Chassis assembly and vehicle

Abstract

The invention provides a chassis assembly (100) and a vehicle (1000), the chassis assembly (100) comprises a chassis frame (1), a tray (2) connected with the chassis frame (1) and a floor (3) located above the tray (2), the tray (2) and the floor (3) define a containing cavity (4), the tray (2) comprises a cooling plate (21), the cooling plate (21) is provided with a plurality of battery cells (5), and the battery cells (5) are located in the containing cavity (4). According to the chassis assembly (100), the integration level of the whole vehicle can be effectively improved, and the power distribution space is optimized.

Description

Chassis components and vehicles Technical Field

[0001] The present application belongs to the field of automobile technology, and more specifically, relates to a chassis assembly and a vehicle. Background Art

[0002] As the power source of electric vehicles, batteries play a crucial role in the vehicle's range, cost, and lifespan. Existing batteries are primarily integrated into the vehicle floor in the form of battery packs, forming part of the vehicle's overall structure. A battery pack typically consists of several battery modules, a battery management system, and a power distribution module. While this modular design helps reduce assembly complexity, it also increases the number of components, increasing the weight and cost of the battery pack and limiting overall vehicle space utilization.

[0003] Summary of the Invention

[0004] In view of the above problems, the embodiments of the present application provide a chassis assembly and a vehicle, which can improve the integration of the entire vehicle and optimize the electrical space.

[0005] In a first aspect, an embodiment of the present application provides a chassis assembly, comprising a chassis frame, a tray connected to the chassis frame, and a floor located above the tray, wherein the tray and the floor define a accommodating cavity, the tray comprising a cooling plate, a plurality of battery cells being arranged on the cooling plate, and the plurality of battery cells being located in the accommodating cavity.

[0006] The chassis assembly provided in the embodiments of the present application is constructed by placing a tray beneath the floor. The tray and the floor together define a storage cavity, into which the battery cells are directly loaded. The tray is then connected to the chassis frame, thereby integrating the battery cells directly into the vehicle chassis. The tray also incorporates a cooling plate, which supports the battery cells while also cooling them. The chassis assembly directly integrates the battery cells, reducing the number of redundant components. Furthermore, the tray improves the integration level, further reducing the number of components by creating multifunctional reuse, thereby improving battery integration and optimizing electrical space. This results in weight and cost reductions for the same amount of power.

[0007] In some embodiments, the tray further includes a tray body, the tray body is connected to the chassis frame, a first receiving groove is provided on the tray body, and the cooling plate is fixed in the first receiving groove.

[0008] By providing a tray body with a first receiving slot within the tray, the tray body is connected to the chassis frame, and the cooling plate is fixed within the first receiving slot, so that the tray body and the cooling plate are combined to form the tray. The tray body and the chassis frame are connected by connecting the tray body to achieve the connection between the tray and the chassis frame. In addition, the first receiving slot is used to load the cooling plate and battery cells, thereby protecting and limiting the cooling plate and battery cells.

[0009] In some embodiments, the floor is connected to the tray body, and the floor covers the first receiving groove to form the receiving cavity.

[0010] By connecting the floor panel to the tray body, the floor panel seals the opening of the first receiving slot, thereby forming a receiving cavity. Since the receiving cavity is defined solely by the floor panel and the tray body, ensuring a reliable connection between the floor panel and the tray body effectively enhances the sealing effect of the receiving cavity and reduces the difficulty of sealing the receiving cavity.

[0011] In some embodiments, a second accommodating groove is formed in a depression on the floor, an opening of the first accommodating groove is opposite to an opening of the second accommodating groove, and the first accommodating groove and the second accommodating groove together constitute the accommodating cavity.

[0012] By setting a second accommodating groove on the floor, the first accommodating groove and the second accommodating groove are connected when the floor is connected to the tray body to form an accommodating cavity. This arrangement is conducive to increasing the volume of the accommodating cavity and improving the loading capacity of battery cells.

[0013] In some embodiments, a seal is provided between the connection area between the floor and the pallet body.

[0014] By providing a seal between the floor and the tray body, the seal is used to improve the airtightness of the accommodating cavity, prevent water vapor and the like from entering the accommodating cavity, and improve the safety of the battery cells.

[0015] In some embodiments, at least one supporting protrusion is provided on the bottom wall of the first receiving groove, and the cooling plate is supported on the supporting protrusion.

[0016] By providing a supporting protrusion on the bottom wall of the first receiving groove and placing the cooling plate on the supporting protrusion, the supporting protrusion can be used to reduce the contact surface between the cooling plate and the bottom wall of the first receiving groove, that is, the tray body, to avoid the cooling plate absorbing the temperature of the tray body, thereby ensuring the cooling effect of the cooling plate on the battery cell.

[0017] In some embodiments, the supporting protrusion includes a bulge formed by the tray body protruding inwardly, and the bulge is connected to the cooling plate via a first fastener.

[0018] By setting the supporting protrusion as a bulge formed by the inward protrusion of the tray body, the bulge supports the cooling plate, and then using a first fastener to connect the bulge and the cooling plate, the first fastener can be partially accommodated in the bulge, and the bulge can protect the first fastener.

[0019] In some embodiments, the tray body includes a first connecting portion disposed around an opening of the first receiving groove, and the first connecting portion is connected to the floor.

[0020] The tray body is connected to the floor by utilizing the first connection portion to connect to the floor. At the same time, the first connection portion is arranged around the opening of the first receiving groove, which can improve the reliability of the connection between the tray body and the floor and improve the sealing effect of the receiving cavity.

[0021] In some embodiments, a second connecting portion is provided on a side of the first connecting portion away from the opening of the first receiving groove, and the second connecting portion is connected to the chassis frame.

[0022] The connection between the pallet body and the chassis frame is achieved by connecting the second connection part to the chassis frame. At the same time, the first connection part and the second connection part are arranged in sequence along the direction away from the opening of the first accommodating groove. The first connection part and the second connection part can cooperate with each other. When the second connection part is connected to the chassis frame, the first connection part can be used to utilize the floor to absorb the contact surface tolerance on the pallet body to relieve the force.

[0023] In some embodiments, a third connection portion is provided on the floor, and the third connection portion is connected to the chassis frame and the first connection portion.

[0024] The third connecting portion is provided on the floor so as to realize connection between the floor, the chassis frame and the tray. The structure is simple and the number of parts is reduced.

[0025] In some embodiments, the tray body is made of steel.

[0026] The tray body not only bears the function of carrying battery cells, but also bears the function of connecting other components. By setting the tray body as a steel part, on the one hand, the strength of the tray body can be guaranteed and the tray body can be prevented from breaking or being damaged, and at the same time, it is also convenient for processing and assembly.

[0027] In some embodiments, the tray further includes an isolation structure disposed in the first receiving groove, wherein the isolation structure divides the first receiving groove into a plurality of sub-regions, at least one of the sub-regions being used to receive and constrain the battery cell.

[0028] By providing an isolation structure within the first receiving tank, the isolation structure divides the first receiving tank into multiple sub-compartments. Battery cells are loaded into the sub-compartments, and the isolation structure can restrain the battery cells from expanding. Furthermore, the isolation structure divides the first receiving tank into multiple sub-compartments, each used to accommodate a battery cell. This allows expansion pressure to be limited to the corresponding sub-compartment when a battery cell expands. The isolation structure also partially offsets the expansion force, preventing battery cells in other sub-compartments from being affected.

[0029] In some embodiments, the isolation structure is disposed on the cooling plate, and the tray body, the cooling plate, and the isolation structure are fixedly connected.

[0030] By fixedly connecting the isolation structure with the tray body and the cooling plate, the three are integrated together to form the tray. On the one hand, the position of the isolation structure can be stabilized, thereby ensuring the position stability of the battery cell. On the other hand, it can also effectively enhance the overall strength of the tray and extend the service life of the tray. At the same time, the tray can be disassembled and assembled as a whole during use, which is more convenient.

[0031] In some embodiments, the isolation structure includes at least one beam.

[0032] By configuring the isolation structure to include a crossbeam, the crossbeam can be used to separate the first receiving groove.

[0033] In some embodiments, the isolation structure further includes at least one longitudinal beam, wherein the longitudinal beam is perpendicular to the transverse beam.

[0034] By configuring the isolation structure to also include longitudinal beams, with the longitudinal beams and transverse beams being perpendicular to each other, the isolation structure presents a criss-cross structure, thereby further improving the strength of the isolation structure, enhancing the restraining effect on the battery cells, and further improving the strength of the tray.

[0035] In some embodiments, the isolation structure further includes at least one longitudinal beam, and the longitudinal beam is welded to the transverse beam.

[0036] By including longitudinal beams in the isolation structure and welding them to the crossbeams, the structural stability of the isolation structure is enhanced, preventing the isolation structure from shaking and affecting the battery cells. Furthermore, welding eliminates the need for additional connectors, reducing the number of components in the pallet and, consequently, its weight.

[0037] In some embodiments, the isolation structure is an aluminum member.

[0038] Aluminum parts are generally light in weight. By setting the isolation structure as an aluminum part, the overall weight of the pallet can be reduced.

[0039] In some embodiments, the cooling plate and the isolation structure are sealed.

[0040] By setting the isolation structure on the cooling plate and sealing the cooling plate and the isolation structure, the flow of water vapor and the like on the contact interface between the cooling plate and the isolation structure can be suppressed, thereby ensuring the sealing effect between the multiple sub-intervals divided by the isolation structure and maintaining the independence of each sub-interval.

[0041] In some embodiments, the pallet also includes a connecting tube that passes through the pallet body, the cooling plate and the isolation structure in sequence, one end of the connecting tube is fixedly connected to the pallet body, and the other end of the connecting tube is fixedly connected to the isolation structure. The connecting tube is also used to pass through the floor and connect to the chassis frame.

[0042] By providing a connecting tube that passes through the tray body, cooling plate, and isolation structure, and with its ends fixedly connected to the tray body and isolation structure respectively, the tray body, cooling plate, and isolation structure are combined to form a single, integrated structure. The connecting tube also passes through the floor and connects to the chassis frame from bottom to top, thus connecting the tray to the chassis frame. Here, the connecting tube serves as both an internal connector for the tray and a connector connecting the tray to the chassis frame, achieving multifunctional reuse, simplifying the chassis assembly structure and reducing its weight.

[0043] In some embodiments, a connector connected to the isolation structure is fixed on the connecting tube.

[0044] By providing a connecting head which is respectively connected and fixed to the connecting cylinder and the isolating structure, the connection and fixation of the connecting cylinder and the isolating structure are indirectly achieved.

[0045] In some embodiments, the connector includes a connecting plate sleeved on the connecting cylinder, and the connecting plate is provided with a first connecting hole for connecting with the isolation structure.

[0046] The connection between the connecting tube and the isolation structure is achieved by configuring the connecting head to include a connecting plate, and utilizing the connecting plate to connect with the isolation structure.

[0047] In some embodiments, the connector further includes a connecting arm disposed on the connecting plate, and the connecting arm is provided with a second connecting hole for connecting to the isolation structure.

[0048] By configuring the connector to further include a connecting arm, and utilizing the connecting plate and the connecting arm to connect with the isolation structure, the reliability of the connection between the connecting cylinder and the isolation structure is improved.

[0049] In some embodiments, the tray further includes a first reinforcement structure disposed in the first receiving groove, and the isolation structure is connected to the first reinforcement structure.

[0050] By providing the first reinforcement structure to be connected to the isolation structure in the first receiving groove, the strength and stability of the isolation structure are enhanced, and the load-bearing capacity of the isolation structure and the restraining effect on the battery cell are improved.

[0051] In some embodiments, the number of the first reinforcement structures is two, and the two first reinforcement structures are respectively attached to opposite sides of the first receiving groove, and both ends of the isolation structure are respectively connected to the first reinforcement structures.

[0052] By placing a pair of first reinforcement structures against opposing inner walls of the first receiving groove, and connecting the pair of first reinforcement structures to both ends of the isolation structure, it can be understood that the isolation structure can prevent the two first reinforcement structures from moving toward each other, and the side walls of the first receiving groove can prevent the two first reinforcement structures from moving away from each other, indirectly preventing the isolation structure from moving. Therefore, the first reinforcement structures, the inner walls of the first receiving groove, and the isolation structure cooperate to achieve position limiting.

[0053] In some embodiments, the isolation structure and the first reinforcement structure are connected via a triangular block.

[0054] By using triangular blocks to connect the isolation structure and the first reinforcement structure, the size of the connection angle between the isolation structure and the first reinforcement structure can be limited. When the angle becomes larger, the triangular blocks can play a pulling role, and when the angle becomes smaller, the triangular blocks can play a barrier role, thereby ensuring the stability of the relative position between the isolation structure and the first reinforcement structure.

[0055] In some embodiments, the first reinforcement structure is welded to the tray body.

[0056] By welding the first reinforcement structure to the pallet body, the stability of the first reinforcement structure can be effectively improved. At the same time, welding does not require the introduction of new parts, which helps to promote the lightweighting of the pallet.

[0057] In some embodiments, the first reinforcement structure is a steel member.

[0058] By configuring the first reinforcement structure as a steel member, the strength of the first reinforcement structure can be effectively ensured.

[0059] In some embodiments, the cooling plate is supported on and fixedly connected to the first reinforcement structure.

[0060] By supporting the cooling plate on the first reinforcement structure and fixedly connecting it to the first reinforcement structure, and since the isolation structure is connected to the first reinforcement structure, the first reinforcement structure, the cooling plate and the isolation structure are combined together to form an integral structure, thereby enhancing the strength of the tray.

[0061] In some embodiments, the first reinforcement structure includes a connecting plate attached to the side wall of the first accommodating groove and a support plate supported on the bottom wall of the first accommodating groove, the connecting plate and the support plate are integrally arranged, the cooling plate is supported on the support plate and fixedly connected to the support plate, and the isolation structure is supported on the cooling plate and fixedly connected to the connecting plate.

[0062] By setting the first reinforcement structure to include a connecting plate and a support plate, the support plate is used to support and fix the cooling plate, and the isolation structure is set on the cooling plate and connected to the connecting plate, the first reinforcement structure can simultaneously support the cooling plate and the isolation structure and connect the two together.

[0063] In some embodiments, the tray further includes a second reinforcement structure, wherein the second reinforcement structure is wrapped around a surface of the tray body on a side facing away from the cooling plate.

[0064] By wrapping a second reinforcement structure on the surface of the tray body on one side facing away from the cooling plate, the second reinforcement structure is used to support the tray body, thereby improving the reliability of the tray.

[0065] In some embodiments, the second reinforcement structure includes at least one transverse reinforcement strip.

[0066] The use of transverse reinforcement strips can effectively improve the strength of the pallet.

[0067] In some embodiments, the second reinforcement structure further includes at least one longitudinal reinforcement strip, wherein the longitudinal reinforcement strip intersects with the transverse reinforcement strip.

[0068] By configuring the second reinforcement structure to also include longitudinal reinforcement bars, the longitudinal reinforcement bars intersect with the transverse reinforcement bars, so that the longitudinal reinforcement bars present an interwoven mesh structure, the strength of the second reinforcement structure is improved while making the second reinforcement structure as lightweight as possible.

[0069] In some embodiments, the second reinforcement structure further includes a connecting side plate for connecting to the chassis frame, and an end portion of the transverse reinforcement bar is connected to the connecting side plate.

[0070] The connection side plates are provided to connect with the chassis frame, and the transverse reinforcement strips are connected with the connection side plates, thereby ensuring the reliability of the connection between the second reinforcement structure and the chassis frame.

[0071] In some embodiments, the second reinforcement structure further includes a connecting end plate for connecting to the chassis frame, and ends of the longitudinal reinforcement strips are connected to the connecting end plate.

[0072] The connection end plates are provided to connect with the chassis frame, and the longitudinal reinforcement strips are connected with the connection end plates, thereby ensuring the reliability of the connection between the second reinforcement structure and the chassis frame.

[0073] In some embodiments, the second reinforcement structure is a steel member.

[0074] By configuring the second reinforcement structure as a steel member, the strength of the second reinforcement structure can be effectively ensured.

[0075] In some embodiments, the second reinforcement structure is welded to the tray body.

[0076] By welding the second reinforcement structure to the pallet body, the pallet's strength can be effectively improved. At the same time, welding does not introduce new components, which helps to achieve a lighter pallet.

[0077] In some embodiments, the floor is located between the chassis frame and the tray.

[0078] By arranging the floor between the chassis frame and the pallet, the pallet, the floor and the chassis frame can form a bottom-up layout, which not only facilitates the installation of the product, but also facilitates the disassembly of the product.

[0079] In some embodiments, the tray and the floor are connected to the same side of the chassis frame.

[0080] By arranging the tray and the floor on the same side of the chassis frame, the installation and disassembly of the tray and the floor are facilitated, and the sealing effect of the accommodating cavity is also improved.

[0081] In some embodiments, the battery cells are bonded to the cooling plate.

[0082] By bonding the battery cells to the cooling plate, on the one hand, the stability of the battery cells can be ensured and the battery cells can be prevented from moving on the cooling plate. On the other hand, the contact between the battery cells and the cooling plate can be strengthened to achieve a better cooling effect.

[0083] In some embodiments, a heat-conducting structural adhesive layer is provided on the surface of the cooling plate, and the battery cells are bonded to the cooling plate via the heat-conducting structural adhesive layer.

[0084] By using a thermally conductive structural adhesive layer to bond the battery cell to the cooling plate, on the one hand, the thermally conductive structural adhesive layer can achieve heat transfer and better cool the battery cell, and on the other hand, it can ensure the adhesion of the battery cell to the cooling plate.

[0085] In some embodiments, the cooling plate is a liquid cooling plate, and a cooling liquid channel for circulating cooling liquid is provided inside the liquid cooling plate.

[0086] By setting the cooling plate as a liquid cooling plate, the battery cells are cooled by using the liquid cooling plate, which has a simple structure and a good cooling effect.

[0087] In some embodiments, the chassis frame includes a frame and a transverse beam disposed on the frame.

[0088] By configuring the chassis frame to include a frame and a transverse beam, the overall structural strength of the chassis frame is improved, while more locations are provided for connecting the chassis frame to the pallet.

[0089] In some embodiments, the tray is detachably connected to the chassis frame.

[0090] By setting the connection mode between the tray and the chassis frame to be detachable, the tray can be unloaded separately when the product needs to be maintained.

[0091] In some embodiments, the tray is threadably connected to the chassis frame.

[0092] By adopting the threaded connection, the detachable connection mode is not only simple in structure and reliable in connection, but also easy to assemble and disassemble.

[0093] In some embodiments, the floor panel is connected to the chassis frame by welding, and the floor panel is sealed to the chassis frame along a circumferential direction.

[0094] The floor is welded to the chassis frame and the floor is sealed to the chassis frame along the circumferential direction, thereby ensuring the sealing of the passenger compartment.

[0095] In a second aspect, an embodiment of the present application provides a vehicle, comprising the chassis assembly provided in the first aspect of the embodiment of the present application.

[0096] The vehicle provided in the embodiment of the present application can effectively improve the integration of batteries and optimize the power distribution space by adopting the above-mentioned chassis components, namely CTC technology; under the condition of the same power, the weight and cost of the entire vehicle can be reduced.

[0097] In some embodiments, the vehicle includes a passenger compartment, and the floor of the chassis assembly constitutes a floor of the passenger compartment.

[0098] By setting the floor of the chassis assembly as the floor of the passenger compartment, the floor serves as both the bulkhead of the passenger compartment and the cavity wall of the accommodating cavity. The passenger compartment and the accommodating cavity share the floor, thereby reducing the number of parts on the vehicle and contributing to lightweighting of the vehicle.

[0099] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0100] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0101] FIG1 is a bottom view of a chassis assembly according to an embodiment of the present application;

[0102] FIG2 is a first exploded structural diagram of a chassis assembly provided in one embodiment of the present application;

[0103] FIG3 is a schematic diagram of the three-dimensional structure of a chassis frame provided in one embodiment of the present application;

[0104] FIG4 is a second exploded structural diagram of a chassis assembly provided in one embodiment of the present application;

[0105] FIG5 is an enlarged view of portion A in FIG4 ;

[0106] FIG6 is a schematic diagram of an exploded structure of a tray provided in one embodiment of the present application;

[0107] FIG7 is an enlarged view of portion B in FIG5 ;

[0108] FIG8 is a schematic cross-sectional view of a chassis assembly according to an embodiment of the present application;

[0109] FIG9 is an enlarged view of portion C in FIG8 ;

[0110] FIG10 is a schematic top view of a tray provided in one embodiment of the present application;

[0111] FIG11 is a cross-sectional view taken along line DD in FIG10 ;

[0112] FIG12 is an enlarged view of portion E in FIG11 ;

[0113] FIG13 is an enlarged view of portion F in FIG11 ;

[0114] FIG14 is a first schematic diagram of a three-dimensional structure of a tray provided in one embodiment of the present application;

[0115] FIG15 is a second schematic perspective structural diagram of a tray provided in one embodiment of the present application, showing a state where a battery cell is installed on the tray;

[0116] FIG16 is a bottom view of a tray provided in one embodiment of the present application;

[0117] FIG17 is a cross-sectional view taken along line GG in FIG16 ;

[0118] FIG18 is an enlarged view of portion H in FIG17 ;

[0119] FIG19 is an enlarged view of portion I in FIG18;

[0120] FIG20 is a schematic structural diagram of a vehicle provided in an embodiment of the present application.

[0121] The accompanying drawings in the specific implementation manner are as follows:

[0122] 100, chassis assembly;

[0123] 1. Chassis frame; 11. Frame; 12. Transverse beam; 121. Mounting hole; 13. First arm; 14. Second arm;

[0124] 2. Pallet;

[0125] 21. Cooling plate; 211. Cooling liquid channel;

[0126] 22. Tray body; 221. First receiving groove; 2211. Sub-interval; 222. Support protrusion; 223. First connecting portion; 2231. First via hole; 224. Second connecting portion; 2241. Second via hole;

[0127] 23. Isolation structure; 231. Crossbeam; 232. Longitudinal beam;

[0128] 24. Connecting tube;

[0129] 25, connector; 251, connecting plate; 2511, first connecting hole; 252, connecting arm; 2521, second connecting hole;

[0130] 26. First reinforcement structure; 261. Triangular block; 262. Connecting plate; 263. Support plate;

[0131] 27. Second reinforcement structure; 271. Horizontal reinforcement strip; 272. Longitudinal reinforcement strip; 273. Connecting side plate; 2731. Third via hole; 274. Connecting end plate;

[0132] 3. Floor; 31. Second receiving groove; 32. Third connecting portion;

[0133] 4. Accommodation cavity;

[0134] 5. Battery cells;

[0135] 6. Seals;

[0136] 71. First fastener; 72. Second fastener; 73. Third fastener; 74. Fourth fastener;

[0137] 1000. Vehicle. DETAILED DESCRIPTION

[0138] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0139] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0140] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0141] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0142] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0143] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0144] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0145] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0146] As the power source of electric vehicles, batteries play a crucial role in the vehicle's range, cost, and lifespan. Existing batteries are primarily integrated into the vehicle floor in the form of battery packs, forming part of the vehicle's overall structure. A battery pack typically consists of several battery modules, a battery management system, and a power distribution module. While this modular design helps reduce assembly complexity, it also increases the number of components, increasing the weight and cost of the battery pack and limiting overall vehicle space utilization.

[0147] To improve vehicle integration, related technologies have proposed integrating the battery module into the vehicle chassis. A battery module primarily consists of multiple battery cells connected in series or parallel, and a housing to house them. While this simplified assembly method reduces the number of components to a certain extent, there is still room for further optimization.

[0148] Based on this, this application proposes a CTC (Cell to Chassis) technology, which integrates battery cells directly into the vehicle chassis to minimize the number of components, thereby improving the integration of the entire vehicle and optimizing the power distribution space.

[0149] The CTC technology disclosed in the embodiments of the present application can be applied to new energy vehicles, including but not limited to pure electric vehicles, hybrid vehicles or extended-range vehicles.

[0150] Referring to Figures 1 to 19, an embodiment of the present application provides a chassis assembly 100, including a chassis frame 1, a tray 2 connected to the chassis frame 1, and a floor 3 located above the tray 2, the tray 2 and the floor 3 define a accommodating cavity 4, the tray 2 includes a cooling plate 21, a plurality of battery cells 5 are arranged on the cooling plate 21, and the plurality of battery cells 5 are located in the accommodating cavity 4.

[0151] The chassis frame 1 refers to a component used to support and install the vehicle's power components and their various components and assemblies, forming the overall shape of the vehicle. Typically, the chassis frame 1 is a metal component to ensure that the chassis frame 1 has high strength. At the same time, metal components are also easier to process and assemble. As an example, the chassis frame 1 is a steel component, which refers to a component made of steel. Steel includes but is not limited to carbon steel, low alloy steel, and stainless steel. The chassis frame 1 can be prepared by forming processes such as rolling and stamping.

[0152] The tray 2 is a component used to support the chassis frame 1. The tray 2 is connected to the chassis frame 1 and can be an integral part (i.e., a fixed connection that requires destruction to be disassembled), including but not limited to welding, or a detachable connection, including but not limited to threaded connection.

[0153] The floor 3 refers to a plate used to isolate the passenger compartment of the car from the interior of the chassis. Usually, the floor 3 is a metal plate to ensure the strength of the floor 3. As an example, the floor 3 is a steel plate. Specifically, referring to Figure 8, the tray 2 is located below the floor 3, and the floor 3 is located above the tray 2, that is, when the car is placed on the ground, the floor 3 is located on the side of the tray 2 away from the ground, that is, the tray 2 is closer to the ground than the floor 3. Optionally, the floor 3 is only connected to the tray 2, which can be an integral setting or a detachable connection. Optionally, the floor 3 is only connected to the chassis frame 1, for example, the floor 3 is welded to the chassis frame 1. Optionally, the floor 3 is connected to the tray 2, and the floor 3 is also connected to the chassis frame 1.

[0154] The accommodating cavity 4 refers to an enclosed space with a certain volume for loading objects. The pallet 2 and the floor 3 define the accommodating cavity 4, which means that the pallet 2 and the floor 3 jointly construct a cavity, that is, the pallet 2 and the floor 3 constitute the cavity wall of the accommodating cavity 4. Usually, at least one of the pallet 2 and the floor 3 is provided with a accommodating groove. As an example, the pallet 2 is provided with a accommodating groove, and the floor 3 is covered on the pallet 2 to obtain the accommodating cavity 4. As an example, the floor 3 is provided with a accommodating groove, and the pallet 2 is covered on the floor 3 to obtain the accommodating cavity 4. As an example, both the pallet 2 and the floor 3 are provided with accommodating grooves, and the pallet 2 and the floor 3 are buckled together, and the accommodating grooves on the two are connected to each other to form the accommodating cavity 4.

[0155] The tray 2 is connected to the chassis frame 1, and the tray 2 includes a cooling plate 21. Here, the cooling plate 21 can be directly connected to the chassis frame 1, or the cooling plate 21 can be indirectly connected to the chassis frame 1. For example, the tray 2 also includes a connecting part, which is respectively connected to the cooling plate 21 and the chassis frame 1, thereby realizing the connection between the tray 2 and the chassis frame 1.

[0156] The cooling plate 21 refers to a component that can achieve a cooling effect. As an example, the cooling plate 21 can be, but is not limited to, one of a liquid cooling plate, an air cooling plate, and a semiconductor cooling plate.

[0157] Battery cells 5 are the basic units that convert chemical energy into electrical energy and are the smallest components of a battery. They can be secondary or primary batteries; they can also be lithium-sulfur batteries, sodium-ion batteries, or magnesium-ion batteries, but are not limited to these. Battery cells 5 can be cylindrical, flat, rectangular, or other shapes.

[0158] Taking a lithium-ion battery as an example, the battery cell 5 typically includes a housing, end caps, an electrode assembly, an electrolyte, and other functional components. The electrode assembly is primarily formed by winding or stacking a negative electrode sheet and a positive electrode sheet into an integrated structure, and a separator is typically provided between adjacent negative and positive electrode sheets.

[0159] Multiple battery cells 5 refer to two or more battery cells 5. Multiple battery cells 5 can be connected in series, in parallel, or in a mixed connection. Mixed connection means that multiple battery cells 5 are connected in both series and parallel. Multiple battery cells 5 are arranged on the cooling plate 21, which means that the cooling plate 21 supports the battery cells 5, rather than supporting the battery module or battery pack. Multiple battery cells 5 are located in the accommodating cavity 4, that is, multiple battery cells 5 are all accommodated in the accommodating cavity 4, and the cavity wall of the accommodating cavity 4 can be used to isolate and protect the battery cells 5.

[0160] The chassis assembly 100 provided in the embodiment of the present application is provided with a tray 2 below the floor 3. The tray 2 and the floor 3 together define a receiving cavity 4. The battery cells 5 are directly loaded into the receiving cavity 4. The tray 2 is connected to the chassis frame 1 to achieve direct integration of the battery cells 5 into the vehicle chassis. At the same time, a cooling plate 21 is integrated on the tray 2. The cooling plate 21 can cool the battery cells 5 while supporting them, thereby achieving multifunctional reuse. On the one hand, the chassis assembly 100 directly uses the battery cells 5 for integration, reducing the number of redundant components. On the other hand, it improves the integration of the tray 2. By creating multifunctional reuse of components, the number of components is further reduced, thereby improving battery integration, optimizing the power distribution space, and achieving weight and cost reduction under the condition of equal power.

[0161] According to some embodiments of the present application, referring to Figures 6 to 9 and Figures 16 to 18, the tray 2 also includes a tray body 22, the tray body 22 is connected to the chassis frame 1, a first accommodating groove 221 is provided on the tray body 22, and the cooling plate 21 is fixed in the first accommodating groove 221.

[0162] The tray body 22 refers to a component for realizing a load-bearing function. Usually, the tray body 22 is a metal part to ensure load-bearing strength. In order to reduce weight, optionally, the tray body 22 is plate-shaped.

[0163] The first receiving groove 221 refers to a cavity with an open end. It can be understood that the first receiving groove 221 is used to construct the receiving cavity 4. The first receiving groove 221 is provided on the tray body 22. In some embodiments, the tray body 22 as a whole is recessed to one side to form the first receiving groove 221. This one-piece molding preparation method is not only convenient to operate, but also has a higher strength of the tray body 22. In other embodiments, a through hole can be opened on the tray body 22, and then the first receiving groove 221 can be welded to the tray body 22.

[0164] The tray 2 is connected to the chassis frame 1 in such a way that the tray body 22 is connected to the chassis frame 1, and the cooling plate 21 is provided on the tray body 22. The cooling plate 21 may be directly connected to the chassis frame 1 or may not be directly connected to the chassis frame 1. Optionally, the cooling plate 21 is not directly connected to the chassis frame 1, nor is it directly connected to the floor 3.

[0165] The cooling plate 21 is fixed in the first receiving groove 221 , and the fixing methods include but are not limited to welding, clamping, threading, bonding, etc. As an example, the cooling plate 21 is fixedly connected to the tray body 22 via a fourth fastener 74 .

[0166] By providing a tray body 22 having a first receiving slot 221 in the tray 2, the tray body 22 is connected to the chassis frame 1, and the cooling plate 21 is fixed in the first receiving slot 221, the tray body 22 and the cooling plate 21 are combined to form the tray 2. The tray 2 and the chassis frame 1 can be connected by connecting the tray body 22 to the chassis frame 1. In addition, the first receiving slot 221 is used to load the cooling plate 21 and the battery cell 5, thereby protecting and limiting the cooling plate 21 and the battery cell 5.

[0167] According to some embodiments of the present application, referring to FIG. 4 , the floor panel 3 is connected to the tray body 22 , and the floor panel 3 covers the first receiving groove 221 to form a receiving cavity 4 .

[0168] The floor 3 is connected to the tray body 22 and can be integrally formed, such as by welding, or detachably connected, such as by bolts. The floor 3 covers the open end of the first receiving groove 221 to form a closed cavity, namely the receiving cavity 4, in the first receiving groove 221.

[0169] By connecting the floor panel 3 to the tray body 22, the floor panel 3 seals the opening of the first receiving slot 221, thereby forming a receiving chamber 4. Since the components defining the receiving chamber 4 are only the floor panel 3 and the tray body 22, as long as the connection between the floor panel 3 and the tray body 22 is reliable, the sealing effect of the receiving chamber 4 can be effectively improved, and the difficulty of sealing the receiving chamber 4 can be reduced.

[0170] According to some embodiments of the present application, please refer to Figures 8 and 9. A second accommodating groove 31 is formed in a depression on the floor 3. The opening of the first accommodating groove 221 is opposite to the opening of the second accommodating groove 31. The first accommodating groove 221 and the second accommodating groove 31 together constitute an accommodating cavity 4.

[0171] The second receiving groove 31 also refers to a cavity with an open end. It is understood that the second receiving groove 31 is used to construct the receiving cavity 4. The second receiving groove 31 is provided on the floor panel 3. Specifically, the floor panel 3 is recessed to one side to form the second receiving groove 31. This one-piece manufacturing method is not only convenient to operate, but also improves the strength of the floor panel 3.

[0172] The opening of the first receiving groove 221 is opposite to the opening of the second receiving groove 31. When the floor panel 3 is connected to the tray body 22, the first receiving groove 221 and the second receiving groove 31 are connected to each other to form the receiving cavity 4. Optionally, the opening of the first receiving groove 221 and the opening of the second receiving groove 31 are the same shape and size.

[0173] By providing a second receiving groove 31 on the floor 3, the first receiving groove 221 and the second receiving groove 31 are connected to each other when the floor 3 is connected to the tray body 22, thereby forming a receiving cavity 4. This arrangement is conducive to increasing the volume of the receiving cavity 4 and improving the loading capacity of the battery cell 5.

[0174] According to some embodiments of the present application, referring to FIG. 2 to FIG. 9 , a seal 6 is provided between the connection area of ​​the floor 3 and the tray body 22 .

[0175] The sealing member 6 refers to a component used to improve the airtightness of the accommodating chamber 4. Optionally, the sealing member 6 is a flexible member with soft elasticity, including but not limited to a silicone member, a rubber member, and the like.

[0176] In order to prevent the seal 6 from shifting, the seal 6 can be clamped between the floor 3 and the pallet body 22, and the floor 3 and the pallet body 22 are used to clamp the seal 6; the seal 6 can also be bonded to at least one of the floor 3 and the pallet body 22; or the seal 6, the floor 3 and the pallet body 22 can be connected and fixed together at the same time by fasteners (such as screws).

[0177] By providing a seal 6 between the floor 3 and the tray body 22 , the seal 6 is used to improve the airtightness of the accommodating cavity 4 , thereby preventing moisture and the like from entering the accommodating cavity 4 and improving the safety of the battery cells 5 .

[0178] According to some embodiments of the present application, referring to FIG. 10 to FIG. 12 , at least one supporting protrusion 222 is provided on the bottom wall of the first receiving groove 221 , and the cooling plate 21 is supported on the supporting protrusion 222 .

[0179] The bottom wall of the first receiving groove 221 refers to the end wall of the first receiving groove 221 opposite the opening. The support protrusion 222 refers to a structure protruding from the bottom wall of the first receiving groove 221. Optionally, the support protrusion 222 is a block assembled (e.g., welded) to the bottom wall of the first receiving groove 221. The number of support protrusions 222 can be one or more, without limitation.

[0180] By providing a support protrusion 222 on the bottom wall of the first accommodating groove 221 and placing the cooling plate 21 on the support protrusion 222, the support protrusion 222 can be used to lower the contact surface between the cooling plate 21 and the bottom wall of the first accommodating groove 221, that is, the tray body 22, to avoid the cooling plate 21 absorbing the temperature of the tray body 22, thereby ensuring the cooling effect of the cooling plate 21 on the battery cell 5.

[0181] According to some embodiments of the present application, referring to FIG. 10 to FIG. 13 , the support protrusion 222 includes a convex bump formed by the tray body 22 protruding inwardly, and the convex bump is connected to the cooling plate 21 via a first fastener 71 .

[0182] For the sake of distinction, the “inside” here refers to the inside of the first receiving groove 221 , and the tray body 22 protruding inwardly refers to the tray body 22 protruding into the first receiving groove 221 , thereby forming a convex bump.

[0183] The convex hull is threadedly connected to the cooling plate 21, specifically, the convex hull is connected to the cooling plate 21 via a first fastener 71. Optionally, the convex hull is threadedly connected to the cooling plate 21, and the first fastener 71 can be, but is not limited to, a screw, a bolt, or the like.

[0184] By setting the support protrusion 222 to include a bulge formed by the tray body 22 protruding inward, the bulge supports the cooling plate 21, and then using the first fastener 71 to connect the bulge and the cooling plate 21, the first fastener 71 can be partially accommodated in the bulge, and the bulge can protect the first fastener 71.

[0185] According to some embodiments of the present application, referring to FIG. 4 , FIG. 5 , FIG. 8 and FIG. 9 , the tray body 22 includes a first connection portion 223 arranged around the opening of the first receiving groove 221 , and the first connection portion 223 is connected to the floor 3 .

[0186] The first connection portion 223 is connected to the floor 3 and can be an integral arrangement, such as welding or riveting, or a detachable connection, such as a threaded connection.

[0187] As an example, the first connection portion 223 includes a flange disposed around the opening of the first receiving slot 221, with a plurality of first through-holes 2231 disposed on the flange. The plurality of first through-holes 2231 are spaced apart along the opening of the first receiving slot 221. The first connection portion 223 is connected to the floor 3 via a second fastener 72. Specifically, the second fastener 72 passes through the first through-hole 2231 and is connected to the floor 3. Optionally, the first connection portion 223 is threadedly connected to the floor 3, and the second fastener 72 may be, but is not limited to, a screw, bolt, or the like. In some embodiments, a seal 6 may be disposed between the connection area between the floor 3 and the tray body 22. The second fastener 72 can simultaneously pass through the tray body 22, the seal 6, and the floor 3 to secure all three.

[0188] The tray body 22 is connected to the floor 3 by utilizing the first connecting portion 223. At the same time, the first connecting portion 223 is arranged around the opening of the first receiving groove 221, which can improve the reliability of the connection between the tray body 22 and the floor 3 and improve the sealing effect of the receiving cavity 4.

[0189] According to some embodiments of the present application, referring to Figures 4, 5, 8 and 9, a second connection portion 224 is provided on a side of the first connection portion 223 away from the opening of the first accommodating groove 221, and the second connection portion 224 is connected to the chassis frame 1.

[0190] A second connecting portion 224 is provided on the side of the first connecting portion 223 away from the opening of the first receiving groove 221. It is understood that the first connecting portion 223 and the second connecting portion 224 are provided in sequence from the opening of the first receiving groove 221 away from the opening. The second connecting portion 224 is connected to the chassis frame 1 and can be integrally provided or detachably connected.

[0191] As an example, the second connecting portion 224 includes a plurality of mounting lugs spaced apart along the edge of the first connecting portion 223. Each mounting lug is provided with a second through-hole 2241. The second connecting portion 224 is connected to the chassis frame 1 via a third fastener 73. Specifically, the third fastener 73 passes through the second through-hole 2241 and is connected to the chassis frame 1. Alternatively, the second connecting portion 224 is threadedly connected to the chassis frame 1. The third fastener 73 may be, but is not limited to, a screw, bolt, or the like.

[0192] The tray body 22 is connected to the chassis frame 1 by utilizing the second connection part 224 to connect with the chassis frame 1. At the same time, the first connection part 223 and the second connection part 224 are arranged in sequence along the direction away from the opening of the first accommodating groove 221. The first connection part 223 and the second connection part 224 can cooperate with each other. When the second connection part 224 is connected to the chassis frame 1, the first connection part 223 can be used to utilize the deformation of the floor 3 to absorb the contact surface tolerance on the tray body 22 and relieve the force.

[0193] According to some embodiments of the present application, referring to FIG. 4 , FIG. 5 , FIG. 8 and FIG. 9 , a third connection portion 32 is provided on the floor 3 , and the third connection portion 32 is connected to the chassis frame 1 and the first connection portion 223 .

[0194] The third connection portion 32 is connected to the chassis frame 1 and the first connection portion 223, which means that the third connection portion 32 is connected to both the chassis frame 1 and the first connection portion 223. Optionally, the third connection portion 32 is integrally provided with the chassis frame 1, for example, by welding, and the third connection portion 32 is detachably connected to the first connection portion 223, for example, by threading.

[0195] As an example, a second receiving groove 31 is provided on the floor panel 3, and the third connecting portion 32 is a flange provided around the opening of the second receiving groove 31. The portion of the flange close to the opening of the second receiving groove 31 is connected to the first connecting portion 223, and the portion of the flange away from the opening of the second receiving groove 31 is connected to the chassis frame 1.

[0196] By providing the third connecting portion 32 on the floor 3 , the floor 3 can be connected to the chassis frame 1 and the tray 2 , which has a simple structure and helps to reduce the number of parts.

[0197] According to some embodiments of the present application, the tray body 22 is made of steel.

[0198] The tray body 22 not only bears the function of carrying the battery cell 5, but also bears the function of connecting other components. By setting the tray body 22 as a steel part, on the one hand, the strength of the tray body 22 can be guaranteed to prevent the tray body 22 from breaking or being damaged, and at the same time, it is also convenient for processing and assembly.

[0199] According to some embodiments of the present application, please refer to Figures 6 to 15, the tray 2 also includes an isolation structure 23 arranged in the first receiving groove 221, and the isolation structure 23 divides the first receiving groove 221 into multiple sub-intervals 2211, and at least one sub-interval 2211 is used to accommodate and constrain the battery cell 5.

[0200] The isolation structure 23 is a component for separating a space and is disposed in the first receiving groove 221 . Optionally, both ends of the isolation structure 23 extend to the inner surface of the sidewall of the first receiving groove 221 .

[0201] The sub-interval 2211 refers to an area whose space size is smaller than the space size of the first receiving groove 221. The isolation structure 23 divides the first receiving groove 221 into a plurality of sub-intervals 2211, where "a plurality" refers to two or more sub-intervals.

[0202] At least one subspace 2211 is used to accommodate and constrain a battery cell 5. This means that all or some of the multiple subspaces 2211 can be used to accommodate and constrain a battery cell 5. Constraint here refers to the subspace 2211 securing the battery cell 5 in place, preventing it from moving. A single subspace 2211 can accommodate zero, one, or multiple battery cells 5. For example, the isolation structure 23 divides the first receiving slot 221 into two subspaces 2211, one of which is used to accommodate and constrain multiple battery cells 5, and the other subspace 2211 is used to accommodate electrical components, such as a battery management unit (BMU) or relays. For example, the isolation structure 23 divides the first receiving slot 221 into 100 subspaces 2211, each of which is used to accommodate and constrain a single battery cell 5. Furthermore, the sizes of the multiple subspaces 2211 can be the same or different.

[0203] By providing an isolation structure 23 within the first receiving groove 221, the isolation structure 23 divides the first receiving groove 221 into multiple sub-regions 2211. Battery cells 5 are loaded within the sub-regions 2211, and the isolation structure 23 can restrain the battery cells 5 from expanding. Furthermore, the isolation structure 23 divides the first receiving groove 221 into multiple sub-regions 2211, each used to accommodate and restrain the battery cells 5. This allows the expansion pressure of a battery cell 5 to be limited to the corresponding sub-region 2211 when it expands. The isolation structure 23 also partially offsets the expansion force, preventing battery cells 5 in other sub-regions 2211 from being affected.

[0204] According to some embodiments of the present application, referring to FIG. 6 to FIG. 15 , the isolation structure 23 is disposed on the cooling plate 21 , and the tray body 22 , the cooling plate 21 and the isolation structure 23 are fixedly connected.

[0205] The tray body 22, cooling plate 21 and isolation structure 23 are fixedly connected, which can be an integral arrangement, such as riveting, or a detachable connection, such as threading. Optionally, the tray body 22, cooling plate 21 and isolation structure 23 are fixed together using a flow drill screw (FDS) riveting process.

[0206] As an example, the isolation structure 23 is set on the cooling plate 21, and the cooling plate 21 is supported on the tray body 22, for example, on the bulge of the tray body 22, and the first fastener 71 is used to pass through the tray body 22, the cooling plate 21 and the isolation structure 23 at the same time and connect the above three together.

[0207] By fixedly connecting the isolation structure 23 with the tray body 22 and the cooling plate 21, the three are integrated together to form the tray 2. On the one hand, the position of the isolation structure 23 can be stabilized, thereby ensuring the position stability of the battery cell 5. On the other hand, it can also effectively enhance the overall strength of the tray 2 and extend the service life of the tray 2. At the same time, the tray 2 can be disassembled and assembled as a whole during use, which is more convenient.

[0208] According to some embodiments of the present application, referring to FIG. 6 to FIG. 15 , the isolation structure 23 includes at least one beam 231 .

[0209] The isolation structure 23 extending along the first direction is referred to as a beam 231. Referring to FIG. 10 , the first direction can be the Y direction shown in the figure, or the X direction. Optionally, the first direction is the X direction. The number of beams 231 can be one or more, and is not limited herein.

[0210] Optionally, the tray body 22 , the cooling plate 21 and the isolation structure 23 are fixedly connected in a manner that specifically includes the tray body 22 , the cooling plate 21 and the crossbeam 231 being fixedly connected.

[0211] By configuring the isolation structure 23 to include the crossbeam 231 , the crossbeam 231 can be used to separate the first receiving groove 221 .

[0212] According to some embodiments of the present application, referring to FIG. 6 to FIG. 15 , the isolation structure 23 further includes at least one longitudinal beam 232 , and the longitudinal beam 232 and the transverse beam 231 are perpendicular to each other.

[0213] The isolation structure 23 extending along the second direction is referred to as a longitudinal beam 232. The second direction is perpendicular to the first direction. Referring to FIG. 10 , when the first direction is the X direction, the second direction is the Y direction. The number of longitudinal beams 232 can be one or more, and is not limited here.

[0214] Optionally, the fixed connection between the tray body 22 , the cooling plate 21 and the isolation structure 23 is specifically that the tray body 22 , the cooling plate 21 and the longitudinal beam 232 are fixedly connected.

[0215] By configuring the isolation structure 23 to also include longitudinal beams 232 , the longitudinal beams 232 and the transverse beams 231 are perpendicular to each other, so that the isolation structure 23 presents a criss-cross structure, the strength of the isolation structure 23 is further improved, the restraining effect on the battery cells 5 is enhanced, and the strength of the tray 2 is further improved.

[0216] According to some embodiments of the present application, referring to FIG. 6 to FIG. 15 , the isolation structure 23 further includes at least one longitudinal beam 232 , and the longitudinal beam 232 is welded to the transverse beam 231 .

[0217] By configuring the isolation structure 23 to also include longitudinal beams 232 and welding the longitudinal beams 232 to the cross beams 231, the structural stability of the isolation structure 23 is enhanced, preventing the isolation structure 23 from shaking and affecting the battery cells 5. Furthermore, the welding method eliminates the need for additional connectors, reducing the number of components in the tray 2 and, consequently, its weight.

[0218] According to some embodiments of the present application, the isolation structure 23 is an aluminum part.

[0219] Aluminum parts refer to parts made of aluminum. The aluminum here can be aluminum metal or aluminum alloy. When the isolation structure 23 includes longitudinal beams 232 and cross beams 231, both longitudinal beams 232 and cross beams 231 are aluminum parts.

[0220] Generally, aluminum parts are light in weight. By configuring the isolation structure 23 as an aluminum part, the overall weight of the tray 2 can be reduced.

[0221] According to some embodiments of the present application, referring to FIG. 6 to FIG. 15 , the cooling plate 21 and the isolation structure 23 are sealed and connected.

[0222] The sealed connection between the cooling plate 21 and the isolation structure 23 refers to a sealed setting of the contact interface between the cooling plate 21 and the isolation structure 23 to prevent the passage of water vapor and the like.

[0223] Optionally, a sealing strip, such as a silicone strip, is provided between the cooling plate 21 and the isolation structure 23 to prevent water vapor from passing through.

[0224] Optionally, sealant is coated on the contact interface between the cooling plate 21 and the isolation structure 23. For example, before the isolation structure 23 is set on the cooling plate 21, sealant is coated on the connecting end face of the isolation structure 23, and then the connecting end face of the isolation structure 23 is docked with the cooling plate 21. The sealant is used to seal the gap between the cooling plate 21 and the isolation structure 23 to inhibit the passage of water vapor.

[0225] By setting the isolation structure 23 on the cooling plate 21 and sealing the cooling plate 21 and the isolation structure 23, it is possible to prevent water vapor and the like from flowing on the contact interface between the cooling plate 21 and the isolation structure 23, thereby ensuring the independence and sealing effect between the sub-intervals 2211 divided by the isolation structure 23.

[0226] According to some embodiments of the present application, please refer to Figures 3 to 18, the pallet 2 also includes a connecting tube 24 that passes through the pallet body 22, the cooling plate 21 and the isolation structure 23 in sequence, one end of the connecting tube 24 is fixedly connected to the pallet body 22, and the other end of the connecting tube 24 is fixedly connected to the isolation structure 23. The connecting tube 24 is also used to pass through the floor 3 and be connected to the chassis frame 1.

[0227] The connecting tube 24 is a hollow cylindrical structure with two open ends. The barrel of the connecting tube 24 sequentially passes through the tray body 22, the cooling plate 21, and the isolation structure 23. One end of the connecting tube 24 extends from the tray body 22 and is fixedly connected to the tray body 22, while the other end of the connecting tube 24 extends from the isolation structure 23 and is fixedly connected to the isolation structure 23. The connecting tube 24 is also used to pass through the floor 3 and connect to the chassis frame 1. Specifically, after passing through the floor 3, the connecting tube 24 connects to the mounting hole 121 on the chassis frame 1, for example, via a fifth fastener (not shown). The fifth fastener can be, but is not limited to, a screw or bolt.

[0228] By providing a connecting tube 24 that passes through the tray body 22, the cooling plate 21, and the isolation structure 23, and having both ends of the connecting tube 24 fixedly connected to the tray body 22 and the isolation structure 23, the tray body 22, the cooling plate 21, and the isolation structure 23 are combined to form a tray 2 having an integral structure. The connecting tube 24 is also used to pass through the floor 3 and connect to the chassis frame 1 from bottom to top, thereby connecting the tray 2 to the chassis frame 1. Here, the connecting tube 24 serves as both a connector inside the tray 2 and a connector connecting the tray 2 to the chassis frame 1, achieving multifunctional reuse, simplifying the structure of the chassis assembly 100, and reducing the weight of the chassis assembly 100.

[0229] According to some embodiments of the present application, referring to FIG. 6 , FIG. 7 , and FIG. 16 to FIG. 18 , a connector 25 connected to the isolation structure 23 is fixed on the connecting cylinder 24 .

[0230] The connecting head 25 is fixedly connected to the connecting tube 24 . For example, the connecting head 25 and the connecting tube 24 are welded, or the connecting head 25 and the connecting tube 24 are snap-fitted, which is not limited here.

[0231] The connector 25 is connected to the isolation structure 23. For example, the connector 25 is threadedly connected to the isolation structure 23, or the connector 25 is snap-connected to the isolation structure 23, which is not limited here.

[0232] By providing a connecting head 25 that is respectively connected and fixed to the connecting cylinder 24 and the isolation structure 23 , the connection and fixation between the connecting cylinder 24 and the isolation structure 23 is indirectly achieved.

[0233] According to some embodiments of the present application, please refer to Figures 6, 7, 16 to 18, the connecting head 25 includes a connecting plate 251 sleeved on the connecting cylinder 24, and the connecting plate 251 is provided with a first connecting hole 2511 for connecting to the isolation structure 23.

[0234] As an example, the connector 25 includes a connecting plate 251 having a central hole through which it is mounted on the connecting tube 24. The connecting plate 251 is provided with two first connecting holes 2511, one at each end of the connecting plate 251. A sixth fastener (not shown) passes through the first connecting holes 2511 to connect the connecting plate 251 to the isolation structure 23, more specifically, to the crossbeam 231. The sixth fastener may be, but is not limited to, a screw.

[0235] The connection between the connecting tube 24 and the isolation structure 23 is achieved by configuring the connecting head 25 to include a connecting flat plate 251 and utilizing the connecting flat plate 251 to connect to the isolation structure 23 .

[0236] According to some embodiments of the present application, referring to Figures 6, 7, 16 to 18, the connector 25 further includes a connecting arm 252 disposed on the connecting plate 251, and the connecting arm 252 is provided with a second connecting hole 2521 for connecting to the isolation structure 23.

[0237] As an example, the connecting head 25 further includes connecting arms 252, for example, two connecting arms 252. The connecting arms 252 are integrally formed with the connecting plate 251. The two connecting arms 252 are symmetrically arranged on two opposite sides of the connecting plate 251. Second connecting holes 2521 are provided on the connecting arms 252, with each connecting arm 252 having a second connecting hole 2521. A seventh fastener (not shown) passes through the second connecting holes 2521 to connect the connecting arms 252 to the isolation structure 23, more specifically to the longitudinal beam 232, which is perpendicular to the cross beam 231. The seventh fastener can be, but is not limited to, a screw.

[0238] By configuring the connector 25 to further include a connecting arm 252 , and utilizing the connecting plate 251 and the connecting arm 252 to connect to the isolation structure 23 , the reliability of the connection between the connecting cylinder 24 and the isolation structure 23 is improved.

[0239] According to some embodiments of the present application, referring to FIG. 6 , FIG. 10 , FIG. 13 and FIG. 14 , the tray 2 further includes a first reinforcing structure 26 disposed in the first receiving groove 221 , and the isolation structure 23 is connected to the first reinforcing structure 26 .

[0240] The first reinforcement structure 26 is a rigid member. The first reinforcement structure 26 can be in the shape of a strip, a plate, or a block. Optionally, the first reinforcement structure 26 is a metal member, and the metal includes but is not limited to iron, copper, aluminum, etc.

[0241] The first reinforcement structure 26 is disposed in the first receiving groove 221 and connected to the isolation structure 23. Optionally, the first reinforcement structure 26 is fixedly connected to the isolation structure 23.

[0242] By providing the first reinforcement structure 26 connected to the isolation structure 23 in the first receiving groove 221 , the strength and structural stability of the isolation structure 23 are enhanced, and the load-bearing capacity of the isolation structure 23 and the restraining effect on the battery cell 5 are improved.

[0243] According to some embodiments of the present application, please refer to Figures 6, 10, 13 and 14. The number of first reinforcement structures 26 is two, and the two first reinforcement structures 26 are respectively attached to the opposite sides of the first accommodating groove 221, and the two ends of the isolation structure 23 are respectively connected to the first reinforcement structures 26.

[0244] As an example, the first reinforcement structure 26 is elongated and extends along the Y-direction, conforming to the sidewalls of the first receiving slot 221. Two first reinforcement structures 26 are spaced apart on opposite sides of the first receiving slot 221. Optionally, the isolation structure 23 includes a plurality of crossbeams 231 extending along the X-direction, with each end of the crossbeam 231 connected to the two first reinforcement structures 26. Optionally, there are three crossbeams 231, which are arranged sequentially along the Y-direction. The ends of the first and last crossbeams 231 are connected to the ends of the two first reinforcement structures 26, respectively, and the ends of the middle crossbeam 231 are connected to the middle positions of the two first reinforcement structures 26. Thus, the first reinforcement structure 26 and the isolation structure 23 form a stable rectangular frame structure. In other embodiments, there may be two or five crossbeams 231, or the first reinforcement structure 26 may extend along the X-direction and be connected to longitudinal beams 232 extending along the Y-direction.

[0245] By placing a pair of first reinforcing structures 26 against opposing inner walls of the first receiving groove 221 and connecting the pair of first reinforcing structures 26 to both ends of the isolation structure 23, it can be understood that the isolation structure 23 prevents the two first reinforcing structures 26 from moving toward each other, and the side walls of the first receiving groove 221 prevent the two first reinforcing structures 26 from moving away from each other, indirectly preventing the movement of the isolation structure 23. Therefore, the first reinforcing structures 26, the inner walls of the first receiving groove 221, and the isolation structure 23 cooperate to achieve position limiting.

[0246] According to some embodiments of the present application, referring to FIG. 6 , FIG. 10 , FIG. 13 and FIG. 14 , the isolation structure 23 and the first reinforcement structure 26 are connected via a triangular block 261 .

[0247] The triangle block 261 refers to a triangular connecting block. Optionally, the triangle is a right triangle, an acute triangle or an obtuse triangle.

[0248] As an example, the triangular block 261 is connected to the isolation structure 23 and the first reinforcement structure 26 . Specifically, two sides of the triangular block 261 are connected to the isolation structure 23 and the first reinforcement structure 26 , respectively.

[0249] By using the triangular block 261 to connect the isolation structure 23 and the first reinforcement structure 26, the size of the connection angle between the isolation structure 23 and the first reinforcement structure 26 can be limited. When the angle becomes larger, the triangular block 261 can play a pulling role, and when the angle becomes smaller, the triangular block 261 can play a barrier role, thereby ensuring the stability of the relative position between the isolation structure 23 and the first reinforcement structure 26.

[0250] According to some embodiments of the present application, the first reinforcement structure 26 is welded to the tray body 22 .

[0251] By welding the first reinforcement structure 26 to the pallet body 22, the stability of the first reinforcement structure 26 can be effectively improved. At the same time, the welding method does not require the introduction of new parts, which is conducive to promoting the lightweighting of the pallet 2.

[0252] According to some embodiments of the present application, the first reinforcement structure 26 is a steel member.

[0253] By configuring the first reinforcement structure 26 as a steel member, the strength of the first reinforcement structure 26 can be effectively ensured.

[0254] According to some embodiments of the present application, referring to FIG. 8 , FIG. 9 , FIG. 11 and FIG. 13 , the cooling plate 21 is supported on the first reinforcement structure 26 and is fixedly connected to the first reinforcement structure 26 .

[0255] A first reinforcement structure 26 is provided in the first accommodating groove 221, the isolation structure 23 is connected to the first reinforcement structure 26, and the cooling plate 21 is fixed in the first accommodating groove 221. Specifically, the first reinforcement structure 26 is provided on the tray body 22, the cooling plate 21 is supported on the first reinforcement structure 26, and the cooling plate 21 is fixedly connected to the first reinforcement structure 26. The fixed connection here includes but is not limited to at least one of bonding, welding, and riveting.

[0256] As an example, the number of the first reinforcement structures 26 is two, and the two first reinforcement structures 26 are respectively arranged on the opposite sides of the first accommodating groove 221, and the two ends of the isolation structure 23 are respectively connected to the first reinforcement structures 26, and the two ends of the cooling plate 21 are respectively supported on the two first reinforcement structures 26, and the cooling plate 21 is clamped between the isolation structure 23 and the first reinforcement structure 26.

[0257] By supporting the cooling plate 21 on the first reinforcement structure 26 and fixedly connecting it to the first reinforcement structure 26, and because the isolation structure 23 is connected to the first reinforcement structure 26, the first reinforcement structure 26, the cooling plate 21 and the isolation structure 23 are combined together to form an integral structure, thereby enhancing the strength of the pallet 2.

[0258] According to some embodiments of the present application, referring to Figures 8, 9, 11 and 13, the first reinforcement structure 26 includes a connecting plate 262 attached to the side wall of the first accommodating groove 221 and a support plate 263 supported on the bottom wall of the first accommodating groove 221, the connecting plate 262 and the support plate 263 are integrally arranged, the cooling plate 21 is supported on the support plate 263 and fixedly connected to the support plate 263, and the isolation structure 23 is supported on the cooling plate 21 and fixedly connected to the connecting plate 262.

[0259] Specifically, the first receiving groove 221 has a bottom wall and side walls, and the bottom wall and the side walls are connected. The first reinforcement structure 26 includes a connecting plate 262 and a support plate 263, and the connecting plate 262 and the support plate 263 are integrally arranged. The connecting plate 262 corresponds to the side wall of the first receiving groove 221 and is attached to the side wall, and the support plate 263 corresponds to the bottom wall of the first receiving groove 221 and is supported on the bottom wall. Optionally, the connecting plate 262 is a flat plate and the support plate 263 is a bent plate. A portion of the support plate 263 is directly supported on the bottom wall, and the other portion is suspended relative to the bottom wall. The cooling plate 21 is supported on the support plate 263, and the cooling plate 21 is fixedly connected to the support plate 263, while the isolation structure 23 is supported on the cooling plate 21 and is fixedly connected to the connecting plate 262. Optionally, the isolation structure 23 is fixedly connected to the connecting plate 262 via a triangular block 261.

[0260] By setting the first reinforcement structure 26 to include a connecting plate 262 and a support plate 263, the support plate 263 is used to support and fix the cooling plate 21, and at the same time the isolation structure 23 is set on the cooling plate 21 and connected to the connecting plate 262, the first reinforcement structure 26 can simultaneously support the cooling plate 21 and the isolation structure 23 and connect the two together.

[0261] According to some embodiments of the present application, referring to FIG. 6 and FIG. 16 , the tray 2 further includes a second reinforcement structure 27 , which is wrapped around a surface of the tray body 22 on one side facing away from the cooling plate 21 .

[0262] The second reinforcement structure 27 wraps around the tray body 22. It is understood that the shape of the second reinforcement structure 27 is adapted to the tray body 22. For example, if the tray body 22 is flat, then the second reinforcement structure 27 is also flat; if the tray body 22 is formed with a first receiving groove 221, then the second reinforcement structure 27 is also formed with a groove adapted to the outer surface of the first receiving groove 221.

[0263] The second reinforcement structure 27 is provided on a surface of the tray body 22, specifically on a side surface facing away from the cooling plate 21. Specifically, the tray body 22 has a first surface and a second surface facing each other along its thickness direction. The cooling plate 21 is provided on the first surface, and the second reinforcement structure 27 is provided on the second surface.

[0264] By wrapping the second reinforcement structure 27 on the surface of the tray body 22 facing away from the cooling plate 21 , the second reinforcement structure 27 is used to support the tray body 22 , thereby improving the reliability of the tray 2 .

[0265] According to some embodiments of the present application, referring to FIG. 6 and FIG. 16 , the second reinforcement structure 27 includes at least one transverse reinforcement strip 271 .

[0266] The long strip of rigid member extending along the first direction is referred to as a transverse reinforcement strip 271. Referring to FIG. 16 , the first direction may be the Y direction shown in the figure, or the X direction. Optionally, the first direction is the X direction. Optionally, there are multiple transverse reinforcement strips 271, and the multiple transverse reinforcement strips 271 are arranged at intervals. Specifically, the transverse reinforcement strip 271 is attached to a side surface of the tray body 22 facing away from the cooling plate 21, such as the second surface.

[0267] The transverse reinforcement strips 271 can effectively improve the strength of the tray 2 .

[0268] According to some embodiments of the present application, referring to FIG. 6 and FIG. 16 , the second reinforcement structure 27 further includes at least one longitudinal reinforcement strip 272 , and the longitudinal reinforcement strip 272 intersects with the transverse reinforcement strip 271 .

[0269] The long strip of rigid member extending along the second direction is called a longitudinal reinforcement bar 272, and the second direction intersects with the first direction. Optionally, the second direction is perpendicular to the first direction, please refer to Figure 16, the first direction is the X direction, and the second direction is the Y direction. Optionally, there are multiple longitudinal reinforcement bars 272, and the multiple longitudinal reinforcement bars 272 are arranged at intervals. Specifically, the longitudinal reinforcement bar 272 is attached to the side surface of the tray body 22 facing away from the cooling plate 21, such as the second surface, and the longitudinal reinforcement bar 272 intersects with the transverse reinforcement bar 271. Optionally, the longitudinal reinforcement bar 272 and the transverse reinforcement bar 271 are welded together.

[0270] By configuring the second reinforcement structure 27 to also include longitudinal reinforcement strips 272 , which intersect with the transverse reinforcement strips 271 , the longitudinal reinforcement strips 272 are formed into an interwoven mesh structure, thereby improving the strength of the second reinforcement structure 27 while making the second reinforcement structure 27 as lightweight as possible.

[0271] According to some embodiments of the present application, referring to Figures 4 to 6 and Figures 16 to 19 , the second reinforcement structure 27 also includes a connecting side plate 273 for connecting to the chassis frame 1 , and the end of the transverse reinforcement strip 271 is connected to the connecting side plate 273 .

[0272] Connecting side plate 273 is a rigid plate extending along a second direction. Referring to Figure 16 , the second direction can be the Y direction shown in the figure, or the X direction. Optionally, the second direction is the Y direction. Connecting side plate 273 is used to connect to chassis frame 1 and can be integral or removably connected.

[0273] As an example, a first receiving groove 221 is formed on the tray body 22, and a connecting side plate 273 is attached to the outer surface of the side wall of the first receiving groove 221. The tray body 22 also includes a first connecting portion 223 and a second connecting portion 224, and the connecting side plate 273 is also provided with a fourth connecting portion (not shown) and a fifth connecting portion (not shown) corresponding to parts of the first connecting portion 223 and the second connecting portion 224, respectively. Optionally, when the first connecting portion 223 is a flange, the fourth connecting portion is also a corresponding flange. Optionally, the second connecting portion 224 is a mounting lug, and a second through-hole 2241 is provided on the mounting lug, and the fifth connecting portion is also a mounting lug corresponding thereto, and a third through-hole 2731 corresponding to the second through-hole 2241 is also provided on the mounting lug, and the third fastener 73 passes through the third through-hole 2731 and the second through-hole 2241 at the same time and is connected to the chassis frame 1.

[0274] The end of the transverse reinforcement strip 271 is connected to the connecting side plate 273. Specifically, the transverse reinforcement strip 271 extends to the outer surface of the connecting side plate 273, that is, the side surface of the connecting side plate 273 facing away from the pallet body 22, and the transverse reinforcement strip 271 is connected to the connecting side plate 273, for example, welded.

[0275] The connection side plates 273 are provided to connect to the chassis frame 1 , and the transverse reinforcement strips 271 are connected to the connection side plates 273 , thereby ensuring the reliability of the connection between the second reinforcement structure 27 and the chassis frame 1 .

[0276] According to some embodiments of the present application, referring to Figures 4 to 6 and Figures 16 to 19 , the second reinforcement structure 27 also includes a connecting end plate 274 for connecting to the chassis frame 1 , and the end of the longitudinal reinforcement strip 272 is connected to the connecting end plate 274 .

[0277] Connecting end plate 274 is a rigid plate extending along a first direction. Referring to Figure 16 , the first direction can be the Y direction shown in the figure, or the X direction. Optionally, the first direction is the X direction. Connecting end plate 274 is used to connect to chassis frame 1 and can be integral or detachably connected.

[0278] As an example, a first receiving groove 221 is formed on the tray body 22, and a connecting end plate 274 is attached to the outer surface of the side wall of the first receiving groove 221. The tray body 22 also includes a first connecting portion 223 and a second connecting portion 224, and the connecting end plate 274 is also provided with a sixth connecting portion (not shown) and a seventh connecting portion (not shown) corresponding to parts of the first connecting portion 223 and the second connecting portion 224, respectively. Optionally, when the first connecting portion 223 is a flange, the sixth connecting portion is also a flange corresponding thereto. Optionally, the second connecting portion 224 is a mounting lug, and a second through-hole 2241 is provided on the mounting lug, and the seventh connecting portion is also a mounting lug corresponding thereto, and a fourth through-hole (not shown) corresponding to the second through-hole 2241 is also provided on the mounting lug, and the third fastener 73 passes through the fourth through-hole and the second through-hole 2241 at the same time and is connected to the chassis frame 1.

[0279] The ends of the longitudinal reinforcing strips 272 are connected to the connecting end plates 274. Specifically, the longitudinal reinforcing strips 272 extend to the outer surface of the connecting end plates 274, i.e., the side surface of the connecting end plates 274 facing away from the tray body 22. The longitudinal reinforcing strips 272 are connected to the connecting end plates 274, for example, by welding. Optionally, the connecting end plates 274 are connected to the connecting side plates 273, for example, by welding.

[0280] The connection end plate 274 is provided to connect with the chassis frame 1 , and the longitudinal reinforcement strip 272 is connected to the connection end plate 274 , thereby ensuring the reliability of the connection between the second reinforcement structure 27 and the chassis frame 1 .

[0281] According to some embodiments of the present application, the second reinforcement structure 27 is a steel member.

[0282] Optionally, the second reinforcement structure 27 includes a transverse reinforcement bar 271, a longitudinal reinforcement bar 272, a connecting side plate 273 and a connecting end plate 274, and the transverse reinforcement bar 271, the longitudinal reinforcement bar 272, the connecting side plate 273 and the connecting end plate 274 are all made of steel.

[0283] By configuring the second reinforcement structure 27 as a steel member, the strength of the second reinforcement structure 27 can be effectively ensured.

[0284] According to some embodiments of the present application, the second reinforcement structure 27 is welded to the tray body 22 .

[0285] By welding the second reinforcement structure 27 to the tray body 22, the strength of the tray 2 can be effectively improved. At the same time, the welding method does not introduce new components, which is conducive to achieving lightweighting of the tray 2.

[0286] According to some embodiments of the present application, referring to FIG. 1 to FIG. 6 , the floor 3 is located between the chassis frame 1 and the tray 2 .

[0287] As can be understood, the tray 2, floor panel 3, and chassis frame 1 are arranged sequentially from bottom to top. Because the tray 2 and floor panel 3 are connected and together define the accommodating cavity 4, during assembly, the tray 2 and floor panel 3 can be assembled together before being attached to the chassis frame 1. Alternatively, the floor panel 3 can be assembled to the chassis frame 1 first, and then the tray 2, floor panel 3, and chassis frame 1 can be connected. Similarly, during disassembly, the tray 2 can be removed independently, or both the tray 2 and floor panel 3 can be removed from the chassis frame 1 simultaneously.

[0288] By arranging the floor 3 between the chassis frame 1 and the pallet 2, the pallet 2, the floor 3 and the chassis frame 1 can form a bottom-up layout, which not only facilitates the installation of the product, but also facilitates the disassembly of the product.

[0289] According to some embodiments of the present application, referring to FIG. 1 to FIG. 6 , the tray 2 and the floor 3 are connected to the same side of the chassis frame 1 .

[0290] Typically, the chassis frame 1 has two opposite sides along its thickness direction, for example, a first side and a second side, wherein the first side is a side of the chassis frame 1 close to the ground when in use, and the second side is a side away from the ground.

[0291] Optionally, the tray 2 and the floor 3 are both located on the first side and connected to the chassis frame 1 .

[0292] By arranging the tray 2 and the floor 3 on the same side of the chassis frame 1 , the installation and disassembly of the tray 2 and the floor 3 are facilitated, and the sealing effect of the accommodating cavity 4 is also improved.

[0293] According to some embodiments of the present application, referring to FIG. 2 to FIG. 4 , the battery cell 5 is bonded to the cooling plate 21 .

[0294] Typically, the battery cell 5 includes two opposite ends, one of which is provided with an electrical connection terminal, such as a tab, and the other end of the battery cell 5 is bonded to the cooling plate 21 , thereby avoiding damage to the electrical connection terminal.

[0295] By bonding the battery cell 5 to the cooling plate 21 , on the one hand, the stability of the battery cell 5 can be ensured and the battery cell 5 can be prevented from moving on the cooling plate 21 ; on the other hand, the contact between the battery cell 5 and the cooling plate 21 can be strengthened to achieve a better cooling effect.

[0296] According to some embodiments of the present application, referring to FIG. 2 to FIG. 4 , a heat-conducting structural adhesive layer (not shown) is provided on the surface of the cooling plate 21 , and the battery cell 5 is bonded to the cooling plate 21 via the heat-conducting structural adhesive layer.

[0297] A thermally conductive structural adhesive layer refers to a structural layer containing thermally conductive adhesive. Thermally conductive adhesive is a material used for heat conduction and structural reinforcement. It typically consists of a thermally conductive material, filler, and adhesive. Thermally conductive adhesive offers advantages such as uniform lamination, good thermal conductivity, excellent adhesion, and heat and corrosion resistance, making it suitable for use in the installation of fixed components.

[0298] By using the thermally conductive structural adhesive layer to bond the battery cell 5 to the cooling plate 21 , the thermally conductive structural adhesive layer can achieve heat transfer and better cool the battery cell 5 , while also ensuring the adhesion of the battery cell 5 to the cooling plate 21 .

[0299] According to some embodiments of the present application, referring to FIG. 12 and FIG. 13 , the cooling plate 21 is a liquid cooling plate, and a cooling liquid channel 211 for circulating cooling liquid is provided inside the liquid cooling plate.

[0300] A liquid cooling plate is a component that uses liquid circulation to transfer heat. Specifically, the plate is internally provided with cooling liquid channels 211 for circulating coolant. The coolant flowing through these channels transfers heat. The coolant can be either water or oil.

[0301] By setting the cooling plate 21 as a liquid cooling plate, the battery cells 5 are cooled by the liquid cooling plate, which has a simple structure and a good cooling effect.

[0302] According to some embodiments of the present application, referring to FIG. 1 to FIG. 18 , the chassis frame 1 includes a frame 11 and a transverse beam 12 provided on the frame 11 .

[0303] Typically, the frame 11 corresponds to the passenger compartment of the vehicle body. Optionally, the frame 11 is square. To ensure strength, the frame 11 is constructed of metal, such as steel. Transverse beams 12 are disposed on the frame 11, with each end of the beam 12 connected to the frame 11. The provision of transverse beams 12 effectively enhances the strength of the chassis frame 1. The number of transverse beams 12 can be one or more.

[0304] As an example, pallet 2 includes a pallet body 22 and an isolation structure 23 mounted on pallet body 22. The chassis frame 1 is connected to the pallet 2, specifically, the frame 11 is connected to the pallet body 22, and the transverse beam 12 is connected to the isolation structure 23. Specifically, the transverse beam 12 is provided with a mounting hole 121, and the isolation structure 23 is provided with a connecting tube 24. The connecting tube 24 passes through the floor 3 and connects to the mounting hole 121 in the chassis frame 1.

[0305] Optionally, the chassis frame 1 further includes a first arm 13 and a second arm 14 respectively connected to the frame 11 , and the first arm 13 and the second arm 14 are used to construct the rear floor and the front cabin respectively.

[0306] By configuring the chassis frame 1 to include a frame 11 and a transverse beam 12 , the overall structural strength of the chassis frame 1 is improved, while more locations are provided for connecting the chassis frame 1 to the pallet 2 .

[0307] According to some embodiments of the present application, referring to FIG. 1 to FIG. 9 , the tray 2 is detachably connected to the chassis frame 1 .

[0308] The detachable connection methods include but are not limited to threaded connection, key connection, and pin connection.

[0309] Optionally, the tray 2 is also detachably connected to the floor 3. The detachable connection mode between the tray 2 and the chassis frame 1 and the detachable connection mode between the tray 2 and the floor 3 can be the same or different, and is not limited here.

[0310] Optionally, the floor 3 is welded to the chassis frame 1 , the tray 2 is in contact with the floor 3 , and a seal 6 is provided between the tray 2 and the floor 3 .

[0311] By setting the connection mode between the tray 2 and the chassis frame 1 to be detachable, the tray 2 can be unloaded separately when the product needs to be maintained.

[0312] According to some embodiments of the present application, referring to FIG. 1 to FIG. 9 , the tray 2 is threadedly connected to the chassis frame 1 .

[0313] As an example, the tray 2 is threadedly connected to the chassis frame 1 via a third fastener 73. Specifically, the third fastener 73 passes through the tray 2 and is connected to the chassis frame 1. The third fastener 73 may be, but is not limited to, a screw, a bolt, or the like.

[0314] Optionally, the tray 2 is also detachably connected to the floor 3, specifically by being threaded. For example, the tray 2 and floor 3 are threadedly connected via a second fastener 72. Specifically, the second fastener 72 passes through both the tray 2 and the floor 3 to secure them. The second fastener 72 can be, but is not limited to, a screw, bolt, or the like.

[0315] By adopting the threaded connection, the detachable connection mode is not only simple in structure and reliable in connection, but also easy to assemble and disassemble.

[0316] According to some embodiments of the present application, the floor panel 3 is connected to the chassis frame 1 by welding, and the floor panel 3 is sealed to the chassis frame 1 along the circumferential direction.

[0317] Typically, the chassis frame 1 corresponds to a passenger compartment of the vehicle body, and the floor panel 3 is configured as the floor of the passenger compartment.

[0318] The floor panel 3 is welded to the chassis frame 1 , and the floor panel 3 is sealed to the chassis frame 1 along the circumferential direction, thereby ensuring the sealing of the passenger compartment.

[0319] Referring to FIG. 20 , an embodiment of the present application further provides a vehicle 1000 , which includes the above-mentioned chassis assembly 100 .

[0320] Optionally, the vehicle 1000 is a new energy vehicle, including but not limited to a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.

[0321] The vehicle 1000 provided in the embodiment of the present application can effectively improve the integration of batteries and optimize the power distribution space by adopting the above-mentioned chassis assembly 100, that is, CTC technology; under the condition of the same power, the weight and cost of the entire vehicle can be reduced.

[0322] According to some embodiments of the present application, the vehicle 1000 includes a passenger compartment, and the floor 3 of the chassis assembly 100 serves as the floor of the passenger compartment.

[0323] The passenger compartment refers to the space provided for passengers in the vehicle 1000. Seats may be provided in the passenger compartment for passengers to sit in. The floor 3 of the chassis assembly 100 serves as the floor of the passenger compartment. In other words, the floor 3 serves not only as a bulkhead of the passenger compartment but also as a wall of the accommodating cavity 4.

[0324] By setting the floor 3 of the chassis assembly 100 as the floor of the passenger compartment, the floor 3 serves as the bulkhead of the passenger compartment and the cavity wall of the accommodating cavity 4 at the same time. The passenger compartment and the accommodating cavity 4 share the floor 3, thereby reducing the number of parts on the vehicle 1000 and contributing to the lightweighting of the vehicle 1000.

[0325] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A chassis assembly, It is characterized in that It includes a chassis frame, a tray connected to the chassis frame and a floor located above the tray, wherein the tray and the floor define a receiving cavity, and the tray includes a cooling plate, a plurality of battery cells are arranged on the cooling plate, and the plurality of battery cells are located in the receiving cavity.

2. The chassis assembly according to claim 1, It is characterized in that The tray further comprises a tray body, wherein the tray body is connected to the chassis frame, and a first receiving groove is arranged on the tray body, and the cooling plate is fixed in the first receiving groove.

3. The chassis assembly according to claim 2, It is characterized in that The floor is connected to the tray body, and the floor covers the first receiving groove to form the receiving cavity.

4. The chassis assembly according to claim 3, It is characterized in that A second accommodating groove is formed in a depression on the floor, an opening of the first accommodating groove is opposite to an opening of the second accommodating groove, and the first accommodating groove and the second accommodating groove together constitute the accommodating cavity.

5. The chassis assembly according to claim 3 or 4, It is characterized in that A sealing member is provided between the connection area between the floor and the pallet body.

6. The chassis assembly according to any one of claims 2 to 5, It is characterized in that At least one supporting protrusion is arranged on the bottom wall of the first accommodating groove, and the cooling plate is supported on the supporting protrusion.

7. The chassis assembly according to claim 6, It is characterized in that The supporting protrusion includes a convex bump formed by the tray body protruding inwardly, and the convex bump is connected to the cooling plate via a first fastener.

8. The chassis assembly according to any one of claims 3 to 7, It is characterized in that The tray body includes a first connection portion disposed around an opening of the first receiving groove, and the first connection portion is connected to the floor.

9. The chassis assembly according to claim 8, It is characterized in that A second connection portion is provided on a side of the first connection portion away from the opening of the first accommodating groove, and the second connection portion is connected to the chassis frame.

10. The chassis assembly according to claim 8 or 9, It is characterized in that A third connection portion is provided on the floor, and the third connection portion is connected to the chassis frame and the first connection portion.

11. The chassis assembly according to any one of claims 2 to 10, It is characterized in that The tray body is a steel part.

12. A chassis assembly according to any one of claims 2 to 11, It is characterized in that The tray further includes an isolation structure disposed in the first receiving groove, wherein the isolation structure divides the first receiving groove into a plurality of sub-regions, at least one of the sub-regions being used to receive and constrain the battery cell.

13. The chassis assembly according to claim 12, It is characterized in that The isolation structure is arranged on the cooling plate, and the tray body, the cooling plate and the isolation structure are fixedly connected.

14. A chassis assembly according to claim 12 or 13, Features: The isolation structure includes at least one beam.

15. The chassis assembly according to claim 14, Features: The isolation structure further comprises at least one longitudinal beam, wherein the longitudinal beam and the transverse beam are perpendicular to each other and / or the longitudinal beam and the transverse beam are welded.

16. A chassis assembly according to any one of claims 12 to 15, It is characterized in that The isolation structure is an aluminum part.

17. A chassis assembly according to any one of claims 13 to 16, It is characterized in that The cooling plate and the isolation structure are sealed and connected.

18. A chassis assembly according to any one of claims 12 to 17, It is characterized in that The pallet also includes a connecting tube that passes through the pallet body, the cooling plate and the isolation structure in sequence, one end of the connecting tube is fixedly connected to the pallet body, and the other end of the connecting tube is fixedly connected to the isolation structure. The connecting tube is also used to pass through the floor and connect to the chassis frame.

19. The chassis assembly according to claim 18, It is characterized in that A connecting head connected to the isolation structure is fixed on the connecting cylinder.

20. The chassis assembly according to claim 19, It is characterized in that The connector includes a connecting plate sleeved on the connecting cylinder, and the connecting plate is provided with a first connecting hole for connecting with the isolation structure.

21. The chassis assembly according to claim 20, It is characterized in that The connector further comprises a connecting arm arranged on the connecting plate, and the connecting arm is provided with a second connecting hole for connecting with the isolation structure.

22. A chassis assembly according to any one of claims 12 to 21, It is characterized in that The tray further includes a first reinforcement structure disposed in the first receiving groove, and the isolation structure is connected to the first reinforcement structure.

23. The chassis assembly of claim 22, It is characterized in that The number of the first reinforcement structures is two, and the two first reinforcement structures are respectively attached to the opposite sides of the first containing groove, and the two ends of the isolation structure are respectively connected to the first reinforcement structures.

24. A chassis assembly according to claim 22 or 23, It is characterized in that The isolation structure and the first reinforcement structure are connected via a triangular block.

25. A chassis assembly according to any one of claims 22 to 24, It is characterized in that The first reinforcement structure is welded to the tray body; and / or the first reinforcement structure is a steel part.

26. A chassis assembly according to any one of claims 22 to 25, It is characterized in that The cooling plate is supported on the first reinforcement structure and is fixedly connected to the first reinforcement structure.

27. The chassis assembly of claim 26, It is characterized in that The first reinforcement structure includes a connecting plate attached to the side wall of the first accommodating groove and a support plate supported on the bottom wall of the first accommodating groove, the connecting plate and the support plate are integrally arranged, the cooling plate is supported on the support plate and fixedly connected to the support plate, and the isolation structure is supported on the cooling plate and fixedly connected to the connecting plate.

28. A chassis assembly according to any one of claims 2 to 27, It is characterized in that The tray further comprises a second reinforcement structure, wherein the second reinforcement structure is wrapped around a surface of a side of the tray body facing away from the cooling plate.

29. The chassis assembly of claim 28, It is characterized in that The second reinforcement structure comprises at least one transverse reinforcement strip.

30. The chassis assembly of claim 29, It is characterized in that The second reinforcement structure further includes at least one longitudinal reinforcement strip, wherein the longitudinal reinforcement strip intersects with the transverse reinforcement strip.

31. A chassis assembly according to claim 29 or 30, It is characterized in that The second reinforcement structure further includes a connecting side plate for connecting to the chassis frame, and the end of the transverse reinforcement strip is connected to the connecting side plate.

32. The chassis assembly of claim 30, It is characterized in that The second reinforcement structure further includes a connection end plate for connecting to the chassis frame, and the end of the longitudinal reinforcement strip is connected to the connection end plate.

33. A chassis assembly according to any one of claims 29 to 32, It is characterized in that The second reinforcement structure is a steel member, and / or the second reinforcement structure is welded to the tray body.

34. A chassis assembly according to any one of claims 1 to 33, It is characterized in that The floor is located between the chassis frame and the tray.

35. A chassis assembly according to any one of claims 1 to 34, It is characterized in that The tray and the floor are connected to the same side of the chassis frame.

36. A chassis assembly according to any one of claims 1 to 35, It is characterized in that The battery cell is bonded to the cooling plate.

37. A chassis assembly according to claim 36, It is characterized in that A heat-conducting structural adhesive layer is provided on the surface of the cooling plate, and the battery cell is bonded to the cooling plate via the heat-conducting structural adhesive layer.

38. A chassis assembly according to any one of claims 1 to 37, It is characterized in that The cooling plate is a liquid cooling plate, and a cooling liquid channel for circulating cooling liquid is arranged inside the liquid cooling plate.

39. A chassis assembly according to any one of claims 1 to 38, It is characterized in that The chassis frame includes a frame and a transverse beam arranged on the frame.

40. A chassis assembly according to any one of claims 1 to 39, It is characterized in that The tray is detachably connected to the chassis frame.

41. A chassis assembly according to claim 40, It is characterized in that The tray is threadedly connected to the chassis frame.

42. A chassis assembly according to any one of claims 1 to 41, It is characterized in that The floor is connected to the chassis frame by welding, and the floor is sealed to the chassis frame along the circumferential direction.

43. A vehicle, It is characterized in that A chassis assembly comprising any one of claims 1 to 42.

44. The vehicle according to claim 43, It is characterized in that The vehicle includes a passenger compartment, and the floor of the chassis assembly is configured as a floor of the passenger compartment.

Images