Chassis assembly and vehicle

Abstract

A chassis assembly (100) comprises a chassis frame (1), a tray (2) and a floor (3), the tray (2) and the floor (3) are connected with the chassis frame (1), the chassis frame (1), the tray (2) and the floor (3) are matched to define a containing cavity (4), the tray (2) comprises a cooling plate (21), the cooling plate (21) is provided with a plurality of single batteries (5), and the single batteries (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. The invention further discloses a vehicle with the chassis assembly.

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 and a tray and a floor connected to the chassis frame, wherein the chassis frame, the tray and the floor cooperate to define a accommodating cavity, the tray comprises a cooling plate, a plurality of battery cells are arranged on the cooling plate, and the plurality of battery cells are located in the accommodating cavity.

[0006] The chassis assembly provided in the embodiments of the present application utilizes a tray and floor panel in conjunction with the chassis frame to define a housing cavity, into which battery cells are loaded directly, thereby enabling direct integration of the battery cells 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 integration by further reducing the number of components by making components such as the chassis frame and cooling plates multifunctional and reusable. This improves battery integration, optimizes electrical space, and achieves weight and cost reductions for the same amount of power.

[0007] In some embodiments, the tray further includes a connecting frame for connecting to the chassis frame, the connecting frame is connected to the cooling plate, and the plurality of battery cells are disposed within the connecting frame.

[0008] The cooling plate and the chassis frame are connected by setting a connecting frame, thereby achieving connection between the cooling plate and the chassis frame. Multiple battery cells are set on the cooling plate and located within the connecting frame, thereby ensuring that all battery cells are located on the inner side of the chassis frame. The connecting frame and the chassis frame together serve as frames around the battery cells, which can improve the space utilization inside the chassis.

[0009] In some embodiments, the connecting frame is provided on a side surface of the cooling plate along an edge of the cooling plate.

[0010] By setting the connecting frame on the surface of the cooling plate, the connecting frame and the cooling plate jointly define a receiving groove, and the connecting frame extends along the edge of the cooling plate, thereby confining the battery cell in the receiving groove. The battery cell can be limited by using the receiving groove.

[0011] In some embodiments, a first seal is sandwiched between the connecting frame and the cooling plate.

[0012] By providing a first seal between the connecting frame and the cooling plate, external moisture can be effectively blocked from entering the accommodating cavity through the interface between the connecting frame and the cooling plate, thereby ensuring the safety of the battery cells in the accommodating cavity.

[0013] In some embodiments, the connecting frame includes a frame and a connecting portion provided on the periphery of the frame, the frame is used to abut against the chassis frame, and the connecting portion is used to be fixedly connected to the chassis frame.

[0014] The connection between the frame and the chassis frame can be achieved through the connecting part. The frame abuts against the chassis frame, which is convenient for installation and disassembly. When disassembling and installing the pallet, the entire pallet can be disassembled by connecting or separating the connecting part from the chassis frame, thereby improving the installation and disassembly efficiency of the pallet.

[0015] In some embodiments, a second seal is sandwiched between the border and the chassis frame.

[0016] By setting a second seal between the frame and the chassis frame, when assembling the pallet, the connecting part is fixedly connected to the chassis frame, and the second seal can be compressed to seal the gap between the connecting frame and the chassis frame, thereby improving the airtightness of the accommodating cavity, preventing water vapor from entering the accommodating cavity, and improving the safety of the battery cell.

[0017] In some embodiments, the connecting frame and the chassis frame are both configured as matching step structures at the connection point, wherein the contact surface between the frame and the chassis frame is higher than the contact surface between the connecting portion and the chassis frame.

[0018] By setting a step structure, the contact surface between the connecting frame and the chassis frame can be increased, thereby improving the sealing performance. Moreover, the contact surface between the frame and the chassis frame is higher than the contact surface between the connecting part and the chassis frame, which can effectively prevent external water from flowing from the connecting part to the frame, thereby further improving the sealing performance of the accommodating cavity.

[0019] In some embodiments, the tray further includes an isolation structure provided on the connecting frame, wherein the isolation structure divides the accommodating cavity into a plurality of sub-intervals, at least one of the sub-intervals being used to accommodate and constrain the battery cells.

[0020] By providing an isolation structure on the frame, the isolation structure divides the storage cavity 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 storage cavity into multiple sub-compartments, each used to accommodate and restrain the battery cells. This way, when a battery cell expands, the expansion pressure is limited to the corresponding sub-compartment. At the same time, the isolation structure can also offset some of the expansion force, preventing battery cells in other sub-compartments from being affected.

[0021] In some embodiments, the isolation structure includes at least one beam.

[0022] By configuring the isolation structure to include a crossbeam, the accommodation cavity can be separated by the crossbeam.

[0023] In some embodiments, the isolation structure further includes at least one longitudinal beam, wherein the longitudinal beam is perpendicular to the transverse beam.

[0024] 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.

[0025] In some embodiments, the isolation structure is disposed on the cooling plate and fixedly connected to the cooling plate.

[0026] By setting the isolation structure on the cooling plate and fixing the isolation structure to the cooling plate, 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, combined with the connection between the connecting frame and the cooling plate, the isolation structure and the connecting frame are connected to the cooling plate, which can effectively enhance the overall strength of the pallet and extend the service life of the pallet.

[0027] In some embodiments, the isolation structure is sealed to the cooling plate.

[0028] 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 independence and sealing effect of the sub-intervals divided by the isolation structure.

[0029] In some embodiments, the tray further includes a connecting tube connected to the isolation structure and the cooling plate, and the connecting tube is further used to connect to the chassis frame.

[0030] By setting up a connecting tube, the isolation structure and the cooling plate can be connected together using the connecting tube to ensure the structural stability of the pallet. At the same time, the connecting tube is also used to connect with the chassis frame to achieve component reuse, which is conducive to improving integration.

[0031] In some embodiments, a connector connected to the isolation structure is fixed on the connecting tube.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] In some embodiments, the plurality of sub-intervals include a first sub-interval and a second sub-interval, the battery cells are installed in the first sub-interval, the electrical components are installed in the second sub-interval, and the electrical components are electrically connected to the battery cells.

[0038] By functionally dividing the multiple sub-compartments within the accommodating cavity, electrical components and battery cells are installed in different sub-compartments to achieve isolation and improve the overall safety of the battery system.

[0039] In some embodiments, the second sub-interval is defined by the connecting frame and the isolation structure.

[0040] By arranging the second sub-interval to be defined by the connecting frame and the isolation structure, the second sub-interval is located at the edge of the accommodating cavity, which facilitates maintenance of the electrical components.

[0041] In some embodiments, a sealed cabin is provided on the connecting frame, and a via hole connecting the second sub-interval and the sealed cabin is further provided on the connecting frame.

[0042] By providing a sealed cabin on the connecting frame and also providing a via hole on the connecting frame, the via hole connects the second sub-interval and the sealed cabin, which facilitates the connection between the components in the second sub-interval and the components in the sealed cabin, simplifies the structure and facilitates lightweighting.

[0043] In some embodiments, the electrical component includes a battery management unit, which is connected to the battery cell through a first copper busbar. A connector is provided on the sealed cabin, and the battery management unit is connected to the connector through a second copper busbar passing through the via hole.

[0044] The battery management unit is connected to the connector on the sealed cabin by using the second copper busbar to pass through the via hole. The connection point between the second copper busbar and the connector is located inside the sealed cabin. The sealed cabin provides a sealed wiring space to protect the connection point and improve safety.

[0045] In some embodiments, the sealed cabin includes a sealing cover provided on the connecting frame and having a cabin body and a hatch covering the cabin body, and a fourth sealing member is provided between the sealing cover and the cabin body.

[0046] By configuring the sealed cabin to include a cabin body and a sealing cover, and arranging a fourth sealing member between the sealing cover and the cabin body, the sealing effect inside the sealed cabin is ensured, thereby improving safety.

[0047] In some embodiments, the tray further includes a bottom guard plate, which is disposed on a side of the cooling plate facing away from the battery cells.

[0048] By setting up the bottom guard plate, it can effectively prevent the chassis from scraping against the ground while the car is driving, causing damage to the cooling plate or stones on the road from bouncing off and hitting the cooling plate.

[0049] In some embodiments, a third seal is provided between the bottom guard plate and the cooling plate.

[0050] By providing a third seal between the bottom guard plate and the cooling plate, external water vapor can be effectively blocked from invading the area between the bottom guard plate and the cooling plate, thereby improving the safety of the cooling plate.

[0051] In some embodiments, the tray is detachably connected to the chassis frame.

[0052] 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.

[0053] In some embodiments, the tray is threadably connected to the chassis frame.

[0054] 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.

[0055] In some embodiments, the floor and the tray are located on opposite sides of the chassis frame.

[0056] By arranging the floor and the pallet on opposite sides of the chassis frame, the pallet, chassis frame and floor can form a bottom-up layout, which facilitates the installation and disassembly of the product.

[0057] In some embodiments, the floor panel is supported on and welded to the chassis frame.

[0058] By supporting the floor on the chassis frame and welding it to the chassis frame, the load-bearing capacity of the floor can be improved, and the floor can isolate the passenger compartment from the battery, thereby improving safety performance.

[0059] In some embodiments, an insulating layer is provided between the floor and the battery cells.

[0060] By providing an insulating layer between the floor and the battery cells, leakage is prevented and safety is improved.

[0061] In some embodiments, the tray is made of aluminum.

[0062] Since the chassis frame is connected to the tray and the floor, they together define a housing cavity for protecting the battery cells. The overall structural strength of the three is relatively high. Therefore, the tray can be designed as an aluminum part. Aluminum parts have the advantages of light weight, high strength and strong antioxidant ability. Using aluminum parts for the tray can reduce the weight of the tray while improving the strength and service life of the tray.

[0063] In some embodiments, the battery cells are bonded to the cooling plate.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] In some embodiments, the chassis frame includes a frame body and a transverse beam disposed on the frame body.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] In some embodiments, the vehicle includes a passenger compartment, and the floor of the chassis assembly constitutes a floor of the passenger compartment.

[0074] 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.

[0075] 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

[0076] 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.

[0077] FIG1 is a schematic diagram of the exploded structure of a chassis assembly provided in one embodiment of the present application;

[0078] FIG2 is a schematic cross-sectional view of a chassis assembly according to an embodiment of the present application;

[0079] FIG3 is an enlarged view of portion A in FIG2 ;

[0080] FIG4 is a schematic diagram of a top view of a tray provided in one embodiment of the present application;

[0081] FIG5 is a schematic diagram of an exploded structure of a tray provided in one embodiment of the present application;

[0082] FIG6 is a schematic diagram of the three-dimensional structure of a tray provided in one embodiment of the present application;

[0083] FIG7 is an enlarged view of portion B in FIG6 ;

[0084] FIG8 is a schematic diagram of a partial structure of a connection frame provided in an embodiment of the present application;

[0085] FIG9 is a schematic structural diagram of a vehicle provided in an embodiment of the present application.

[0086] The accompanying drawings in the specific implementation manner are as follows:

[0087] 100, chassis assembly;

[0088] 1. Chassis frame; 11. Frame; 12. Transverse beam; 121. Mounting hole; 13. First arm; 14. Second arm;

[0089] 2. Pallet;

[0090] 21. Cooling plate; 211. Thermal conductive structural adhesive layer;

[0091] 22. Connecting frame; 221. Frame; 222. Connecting portion; 223. Sealed cabin; 2231. Cabin body; 2232. Sealing cover; 2233. Hatch; 224. Via hole;

[0092] 23. Isolation structure; 231. Crossbeam; 232. Longitudinal beam;

[0093] 24. Connecting tube;

[0094] 25, connector; 251, connecting plate; 2511, first connecting hole; 252, connecting arm; 2521, second connecting hole;

[0095] 26. Bottom guard plate;

[0096] 3. Floor;

[0097] 4. Accommodation chamber; 41. First sub-interval; 42. Second sub-interval;

[0098] 5. Battery cell; 51. Electrical component; 511. First copper busbar; 512. Second copper busbar; 52. Connector;

[0099] 61. First sealing member; 62. Second sealing member; 63. Third sealing member;

[0100] 71. Fourth fastener; 72. Fifth fastener;

[0101] 1000. Vehicle. DETAILED DESCRIPTION

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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).

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] Referring to Figures 1 to 8, an embodiment of the present application provides a chassis assembly 100, including a chassis frame 1 and a tray 2 and a floor 3 connected to the chassis frame 1. The chassis frame 1, the tray 2 and the floor 3 cooperate to define a accommodating cavity 4. The tray 2 includes a cooling plate 21, and a plurality of battery cells 5 are arranged on the cooling plate 21. The plurality of battery cells 5 are located in the accommodating cavity 4.

[0115] 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.

[0116] 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 for disassembly), including but not limited to welding and riveting, or a detachable connection, including but not limited to threaded connection.

[0117] The floor panel 3 is a sheet of material used to isolate the passenger compartment from the interior of the chassis. Typically, the floor panel 3 is made of metal to ensure its strength. For example, the floor panel 3 is made of steel. The floor panel 3 is connected to the chassis frame 1, either as an integral component, such as by welding, or by a removable connection.

[0118] The accommodating cavity 4 is an enclosed space of a certain volume for loading objects. The chassis frame 1, tray 2, and floor 3 cooperate to define the accommodating cavity 4. This refers to the cavity formed by the chassis frame 1, tray 2, and floor 3 when connected together. The chassis frame 1, tray 2, and floor 3 form the walls of the accommodating cavity 4.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] The multiple battery cells 5 refer to two or more battery cells 5. The multiple battery cells 5 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 5 are connected in both series and parallel.

[0123] The multiple battery cells 5 are disposed on the cooling plate 21, meaning that the cooling plate 21 directly supports the battery cells 5, rather than supporting the battery module or battery pack. The multiple battery cells 5 are located within the accommodating cavity 4, that is, the multiple battery cells 5 are all accommodated within the accommodating cavity 4, and the cavity wall of the accommodating cavity 4 can isolate and protect the battery cells 5.

[0124] The chassis assembly 100 provided in the embodiment of the present application utilizes a tray 2 and a floor 3 to cooperate with the chassis frame 1 to define a receiving cavity 4, into which the battery cells 5 are directly loaded, thereby directly integrating the battery cells 5 into the vehicle chassis. Furthermore, a cooling plate 21 is integrated into the tray 2, which supports the battery cells 5 while also cooling them. The chassis assembly 100 directly integrates the battery cells 5, reducing the number of redundant components. Furthermore, the tray 2 improves its integration by making components such as the chassis frame 1 and the cooling plate 21 multifunctional and reusable, further reducing the number of components. This improves battery integration, optimizes electrical distribution space, and achieves weight and cost reductions while maintaining the same amount of power.

[0125] According to some embodiments of the present application, referring to Figures 2 to 6, the tray 2 further includes a connecting frame 22 for connecting to the chassis frame 1, the connecting frame 22 is connected to the cooling plate 21, and a plurality of battery cells 5 are arranged in the connecting frame 22.

[0126] The connecting frame 22 refers to a hollow frame structure and is used to connect the chassis frame 1. Usually, the shape and size of the connecting frame 22 are consistent with the shape and size of the chassis frame 1. For example, if the chassis frame 1 is square, the connecting frame 22 is also square.

[0127] The connecting frame 22 is connected to the cooling plate 21 and can be integral or detachably connected. The cooling plate 21 can be disposed within the connecting frame 22, i.e., the connecting frame 22 surrounds the cooling plate 21, or the cooling plate 21 can be disposed on one side of the connecting frame 22, i.e., the connecting frame 22 is disposed on the surface of the cooling plate 21.

[0128] The connecting frame 22 is connected to the cooling plate 21 and is used to connect to the chassis frame 1 . To ensure strength, the connecting frame 22 is optionally a metal part.

[0129] The multiple battery cells 5 are arranged in the connecting frame 22 , which means that the shadows of the multiple battery cells 5 are located in the hollow area of ​​the connecting frame 22 when projected in a direction perpendicular to the connecting frame 22 .

[0130] The cooling plate 21 and the chassis frame 1 are connected by providing a connecting frame 22, thereby achieving connection between the cooling plate 21 and the chassis frame 1. Multiple battery cells 5 are provided on the cooling plate 21 and located within the connecting frame 22, thereby ensuring that all battery cells 5 are located on the inner side of the chassis frame 1. The connecting frame 22 and the chassis frame 1 together serve as frames around the battery cells 5, which can improve the space utilization inside the chassis.

[0131] According to some embodiments of the present application, referring to FIG. 2 to FIG. 6 , the connecting frame 22 is provided along the edge of the cooling plate 21 on a side surface of the cooling plate 21 on which the battery cells 5 are provided.

[0132] Specifically, the cooling plate 21 has two opposite surfaces along the thickness direction, namely a first surface and a second surface, and the connecting frame 22 and the battery cell 5 are both arranged on the first surface.

[0133] As an example, the cooling plate 21 is in the shape of a flat plate, with dimensions slightly larger than the hollow interior dimensions of the connecting frame 22, and the edge of the cooling plate 21 is fixedly connected to the bottom of the connecting frame 22. In other embodiments, the cross-sectional shape of the cooling plate 21 can also be set to be U-shaped, and the connecting frame 22 is fixedly connected to the outer sides of the cooling plate 21.

[0134] By setting the connecting frame 22 on the surface of the cooling plate 21, the connecting frame 22 and the cooling plate 21 jointly define a receiving groove, and the connecting frame 22 extends along the edge of the cooling plate 21, thereby confining the battery cell 5 in the receiving groove. The battery cell 5 can be limited by using the receiving groove.

[0135] According to some embodiments of the present application, referring to FIG. 5 , a first sealing member 61 is sandwiched between the connecting frame 22 and the cooling plate 21 .

[0136] The first sealing member 61 is a material or component used to prevent fluid or solid particles from invading the accommodating cavity 4 from adjacent joint surfaces. The material of the first sealing member 61 includes but is not limited to nitrile rubber, EPDM rubber, fluororubber, silicone rubber, fluorosilicone rubber, nylon, polyurethane, etc.

[0137] As an example, the first sealing member 61 is a sealing gasket, which is provided along the edge of the cooling plate 21. Of course, in other embodiments, the first sealing member 61 may also be a sealant or the like.

[0138] By providing a first seal 61 between the connecting frame 22 and the cooling plate 21 , external moisture can be effectively blocked from entering the accommodating cavity 4 through the interface between the connecting frame 22 and the cooling plate 21 , thereby ensuring the safety of the battery cells 5 in the accommodating cavity 4 .

[0139] According to some embodiments of the present application, please refer to Figures 2 to 5. The connecting frame 22 includes a frame 221 and a connecting portion 222 arranged on the outer periphery of the frame 221. The frame 221 is used to abut against the chassis frame 1, and the connecting portion 222 is used to be fixedly connected to the chassis frame 1.

[0140] The connecting frame 22 includes a frame 221 and a connecting portion 222. The connecting portion 222 is arranged on the outer periphery of the frame 221, that is, the connecting portion 222 is opposite to the hollow area of ​​the frame 221. It can be understood that the frame 221 and the connecting portion 222 are arranged in sequence along the direction extending outward from the center of the connecting frame 22. The frame 221 and the connecting portion 222 can be integrally formed or assembled together.

[0141] The frame 221 is used to abut against the chassis frame 1. Here, the frame 221 can be used to directly contact the chassis frame 1 and push each other, or the frame 221 can indirectly apply force to the chassis frame 1. For example, an intermediate object is provided between the frame 221 and the chassis frame 1, and the frame 221 indirectly pushes the chassis frame 1 by directly pushing the intermediate object.

[0142] The connection portion 222 is used for fixed connection with the chassis frame 1 , and the fixed connection includes but is not limited to threaded connection, welding, snap connection, riveting, etc.

[0143] As an example, the frame 221 is a square frame formed in an integral manner, and the connecting portion 222 is a protrusion formed by protruding outward from the side portion of the square frame. The square frame has four sides, each of which is provided with a protrusion. A first threaded hole (not shown) is provided on the square frame, and the cooling plate 21 is connected to the first threaded hole via a first threaded member (not shown), thereby connecting the cooling plate 21 to the connecting frame 22. A second threaded hole (not shown) is provided on the protrusion, and the chassis frame 1 is connected to the second threaded hole via a second threaded member (not shown), thereby connecting the chassis frame 1 to the connecting frame 22.

[0144] The connection between the frame 22 and the chassis frame 1 can be achieved through the connecting part 222, and the frame 221 abuts against the chassis frame 1, which is convenient for installation and disassembly. When disassembling and installing the pallet 2, the entire disassembly of the pallet 2 can be achieved by connecting or separating the connecting part 222 from the chassis frame 1, thereby improving the installation and disassembly efficiency of the pallet 2.

[0145] According to some embodiments of the present application, referring to FIG. 2 and FIG. 3 , a second sealing member 62 is sandwiched between the frame 221 and the chassis frame 1 .

[0146] The second sealing member 62 also refers to a material or part used to prevent fluid or solid particles from invading the accommodating cavity 4 from between adjacent joint surfaces. Optionally, the second sealing member 62 is a flexible member with soft elasticity, including but not limited to silicone members, rubber members, etc.

[0147] By setting a second seal 62 between the frame 221 and the chassis frame 1, when assembling the pallet 2, the connecting portion 222 is fixedly connected to the chassis frame 1, and the second seal 62 can be compressed to seal the gap between the connecting frame 22 and the chassis frame 1, thereby improving the airtightness of the accommodating cavity 4, preventing water vapor and the like from entering the accommodating cavity 4, and improving the safety of the battery cell 5.

[0148] According to some embodiments of the present application, please refer to Figures 2 and 3, the connecting frame 22 and the chassis frame 1 are both set to a matching step structure at the connection point, wherein the contact surface between the frame 221 and the chassis frame 1 is higher than the contact surface between the connecting part 222 and the chassis frame 1.

[0149] Specifically, referring to the orientation shown in FIG2 , the upper end of the connecting frame 22 is docked with the lower end of the chassis frame 1, the upper end of the connecting frame 22 is set as a step structure, and the lower end of the chassis frame 1 is also set as a step structure, and the two step structures are mutually adapted, that is, the two are complementary, thereby ensuring that they are limited and matched with each other during docking. The upper end of the connecting frame 22 is set as a step structure, wherein the frame 221 is formed as a first step, the upper surface of the frame 221 is a first step surface, the connecting portion 222 is formed as a second step, and the upper surface of the connecting portion 222 is a second step surface. The contact surface between the frame 221 and the chassis frame 1 is the first step surface, and the contact surface between the connecting portion 222 and the chassis frame 1 is the second step surface, that is, the first step surface is higher than the second step surface.

[0150] By setting a step structure, the contact surface between the connecting frame 22 and the chassis frame 1 can be increased, thereby improving the sealing performance. Moreover, the contact surface between the frame 221 and the chassis frame 1 is higher than the contact surface between the connecting portion 222 and the chassis frame 1, thereby effectively preventing external water from flowing from the connecting portion 222 to the frame 221, thereby further improving the sealing performance of the accommodating cavity 4.

[0151] According to some embodiments of the present application, referring to Figures 4 to 6, the tray 2 also includes an isolation structure 23 arranged on the connecting frame 22, and the isolation structure 23 divides the accommodating cavity 4 into multiple sub-intervals, at least one of which is used to accommodate and constrain the battery cell 5.

[0152] The isolation structure 23 is a component for separating a space and is disposed on the frame 22 . Optionally, both ends of the isolation structure 23 are connected to the frame 22 .

[0153] A sub-interval refers to an area whose space size is smaller than that of the accommodation cavity 4. The isolation structure 23 divides the accommodation cavity 4 into a plurality of sub-intervals, where a plurality refers to two or more sub-intervals.

[0154] At least one subinterval is used to accommodate and constrain the battery cell 5 means that the multiple subintervals can be used to accommodate and constrain the battery cell 5 in full or in part. A single subinterval may accommodate 0 battery cells 5, 1 battery cell 5, or multiple battery cells 5. As an example, the isolation structure 23 divides the accommodating cavity 4 into 2 subintervals, one of which is used to accommodate and constrain multiple battery cells 5, and the other subinterval is used to accommodate electrical components 51, such as battery management units, relays, etc. As an example, the isolation structure 23 divides the accommodating cavity 4 into 100 subintervals, each of which is used to accommodate and constrain 1 battery cell 5. At the same time, the size of each subinterval in the multiple subintervals may be the same or different.

[0155] By providing an isolation structure 23 on the frame 22, the isolation structure 23 divides the accommodating chamber 4 into multiple sub-compartments. The battery cells 5 are loaded into the sub-compartments, and the isolation structure 23 can restrain the battery cells 5 from expanding. In addition, the isolation structure 23 divides the accommodating chamber 4 into multiple sub-compartments, each of which is used to accommodate and restrain the battery cells 5. In this way, when a battery cell 5 expands, the expansion pressure is limited to the corresponding sub-compartment. At the same time, the isolation structure 23 can also offset some of the expansion force, preventing battery cells 5 in other sub-compartments from being affected.

[0156] According to some embodiments of the present application, referring to FIG. 4 to FIG. 6 , the isolation structure 23 includes at least one beam 231 .

[0157] The isolation structure 23 extending along the first direction is referred to as a beam 231. Referring to FIG. 4 , the first direction can be the Y direction shown in the figure, or it can be the X direction. Optionally, the first direction is the Y direction. The number of beams 231 can be one or more, and is not limited here.

[0158] By configuring the isolation structure 23 to include the crossbeam 231 , the accommodating cavity 4 can be separated by the crossbeam 231 .

[0159] According to some embodiments of the present application, referring to FIG. 4 to FIG. 6 , the isolation structure 23 further includes at least one longitudinal beam 232 , and the longitudinal beam 232 is perpendicular to the transverse beam 231 .

[0160] 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. 4 , when the first direction is the Y direction, the second direction is the X direction. The number of longitudinal beams 232 can be one or more, and is not limited here.

[0161] 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.

[0162] According to some embodiments of the present application, the longitudinal beam 232 is welded to the transverse beam 231 .

[0163] By configuring the isolation structure 23 to further include the longitudinal beam 232 and welding the longitudinal beam 232 to the transverse beam 231 , the structural stability of the isolation structure 23 is enhanced, and the isolation structure 23 is prevented from shaking and affecting the battery cells 5 .

[0164] According to some embodiments of the present application, the isolation structure 23 is an aluminum part.

[0165] 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.

[0166] 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.

[0167] According to some embodiments of the present application, referring to FIG. 4 to FIG. 6 , the isolation structure 23 is disposed on the cooling plate 21 , and the cooling plate 21 is fixedly connected to the isolation structure 23 .

[0168] The isolation structure 23 is disposed on a side surface of the cooling plate 21, specifically on the same side surface of the cooling plate 21 as the battery cells 5. The cooling plate 21 and the isolation structure 23 are fixedly connected, either integrally or removably. For example, the cooling plate 21 and the isolation structure 23 are connected by screws. For example, the cooling plate 21 and the isolation structure 23 are welded together.

[0169] By setting the isolation structure 23 on the cooling plate 21, the isolation structure 23 is fixedly connected to the cooling plate 21. 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, combined with the connection frame 22 and the cooling plate 21, the isolation structure 23 and the connecting frame 22 are connected to the cooling plate 21, which can effectively enhance the overall strength of the tray 2 and extend the service life of the tray 2.

[0170] According to some embodiments of the present application, referring to FIG. 4 to FIG. 6 , the isolation structure 23 is sealedly connected to the cooling plate 21 .

[0171] 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.

[0172] 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.

[0173] 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.

[0174] 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 of the sub-intervals divided by the isolation structure 23.

[0175] According to some embodiments of the present application, referring to FIG. 1 and FIG. 4 to FIG. 7 , the tray 2 further includes a connecting tube 24 connected to the isolation structure 23 and the cooling plate 21 , and the connecting tube 24 is also used to connect to the chassis frame 1 .

[0176] The connecting tube 24 is specifically a hollow cylindrical structure with two ends opened.

[0177] As an example, the body of the connecting tube 24 sequentially passes through the cooling plate 21 and the isolation structure 23. One end of the connecting tube 24 extends from the cooling plate 21 and is fixedly connected to the cooling plate 21, 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 connect to the chassis frame 1. Specifically, the connecting tube 24 is connected to the mounting hole 121 on the chassis frame 1, for example, via a first fastener (not shown). The first fastener can be, but is not limited to, a screw or bolt.

[0178] By setting up the connecting tube 24, the isolation structure 23 can be connected to the cooling plate 11 using the connecting tube 24 to ensure the structural stability of the tray 2. At the same time, the connecting tube 24 is also used to connect to the chassis frame 1 to achieve component reuse, which is conducive to improving integration.

[0179] According to some embodiments of the present application, referring to FIG. 4 to FIG. 7 , a connector 25 connected to the isolation structure 23 is fixed on the connecting cylinder 24 .

[0180] 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.

[0181] 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.

[0182] 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.

[0183] According to some embodiments of the present application, referring to FIG. 4 to FIG. 7 , the connector 25 includes a connecting plate 251 sleeved on the connecting cylinder 24 , and a first connecting hole 2511 for connecting to the isolation structure 23 is provided on the connecting plate 251 .

[0184] As an example, the connector 25 includes a connecting plate 251 having a central hole through which the connecting plate 251 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 second 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 second fastener may be, but is not limited to, a screw.

[0185] 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 .

[0186] According to some embodiments of the present application, referring to FIG. 4 to FIG. 7 , 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 .

[0187] 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.

[0188] 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.

[0189] According to some embodiments of the present application, please refer to Figures 4 to 6. The multiple sub-intervals include a first sub-interval 41 and a second sub-interval 42. The first sub-interval 41 is installed with a battery cell 5, and the second sub-interval 42 is installed with an electrical component 51. The electrical component 51 is electrically connected to the battery cell 5.

[0190] The first sub-interval 41 and the second sub-interval 42 are respectively designated as sub-intervals for different purposes. The first sub-interval 41 is used to accommodate battery cells 5, and the second sub-interval 42 is used to accommodate electrical components 51. There can be one or more first sub-intervals 41 and one or more second sub-intervals 42.

[0191] The electrical components 51 refer to electronic components used to be electrically connected to the battery cells 5 to cooperate with the battery cells 5 to work, including but not limited to battery management units, relays, fuses, etc.

[0192] As an example, referring to FIG. 4 , the accommodating chamber 4 is divided into seven sub-intervals, six of which are first sub-intervals 41 , and only one sub-interval is a second sub-interval 42 .

[0193] By functionally dividing the multiple sub-compartments within the accommodating cavity 4 , the electrical components 51 and the battery cells 5 are respectively installed in different sub-compartments to achieve isolation and improve the overall safety of the battery system.

[0194] According to some embodiments of the present application, referring to FIG. 4 to FIG. 6 , the second sub-interval 42 is defined by the connecting frame 22 and the isolation structure 23 .

[0195] It can be understood that the second sub-interval 42 is arranged close to the connecting frame 22 and is located at the edge of the accommodating cavity 4 , and the connecting frame 22 constitutes a side wall of the second sub-interval 42 .

[0196] By configuring the second sub-interval 42 to be defined by the connecting frame 22 and the isolation structure 23 , the second sub-interval 42 is located at the edge of the accommodating cavity 4 , making it easier to maintain the electrical component 51 .

[0197] According to some embodiments of the present application, referring to FIG. 4 to FIG. 7 , a sealed cabin 223 is provided on the connecting frame 22 , and a via hole 224 connecting the second sub-interval 42 and the sealed cabin 223 is further provided on the connecting frame 22 .

[0198] The sealed cabin 223 is a closed container and is disposed on the connecting frame 22 . Optionally, the sealed cabin 223 is welded to the connecting frame 22 , and the connecting frame 22 constitutes a bulkhead of the sealed cabin 223 .

[0199] The connecting frame 22 is further provided with a via 224, which connects the second sub-interval 42 and the sealed compartment 223. The number of the via 224 can be one or more. The via 224 can be a round hole or a square hole, which is not limited here.

[0200] As an example, referring to Fig. 4, the connecting frame 22 is a square, and the connecting frame 22 comprises a front frame bar, a rear frame bar, a left frame bar and a right frame bar, and wherein the airtight cabin 223 is installed on the front frame bar.The connecting frame 22 is provided with an isolation structure 23, which comprises three crossbeams 231, the two ends of which are connected with the left frame bar and the right frame bar respectively, and along the front frame bar to the direction of the rear frame bar, the three crossbeams 231 are spaced apart in sequence.Wherein, the front frame bar, the left frame bar and the right frame bar and the first crossbeam 231 along the direction of the front frame bar to the rear frame bar define the second subinterval 42 together.On the front frame bar, a via 224 is provided, and this via 224 communicates with the second subinterval 42 and the airtight cabin 223.

[0201] By providing a sealed cabin 223 on the connecting frame 22, and also providing a through hole 224 on the connecting frame 22, the through hole 224 connects the second sub-interval 42 and the sealed cabin 223, so as to facilitate the connection between the components in the second sub-interval 42 and the components in the sealed cabin 223, simplifying the structure and facilitating lightweighting.

[0202] According to some embodiments of the present application, please refer to Figures 4 to 6. The electrical component 51 includes a battery management unit, which is connected to the battery cell 5 through a first copper bus 511. A connector 52 is provided on the sealed cabin 223, and the battery management unit is connected to the connector 52 through a second copper bus 512 through a via 224.

[0203] A battery management unit (BMU), also known as a battery management system, is an electronic device that monitors and manages batteries. By collecting and calculating parameters like voltage, current, and temperature, the BMU controls the charge and discharge process, protecting the battery and improving its overall performance.

[0204] The copper busbar refers to a copper busbar. The first copper busbar 511 is used to connect the battery management unit and the battery cell 5. The second copper busbar 512 is used to connect the battery management unit and the connector 52.

[0205] Connector 52 is a connector, also known as a joint, socket, or electrical connector, used to connect two active devices to transmit current or signals. Connector 52 is mounted on sealed compartment 223, with a portion located within and a portion exposed outside. A second copper busbar 512 extends through via 224 into sealed compartment 223 and connects to connector 52.

[0206] The battery management unit is connected to the connector 52 on the sealed cabin 223 by using the second copper busbar 512 to pass through the via 224. The connection position between the second copper busbar 512 and the connector 52 is located in the sealed cabin 223. The sealed cabin 223 provides a sealed wiring space to protect the connection position and improve safety.

[0207] According to some embodiments of the present application, please refer to Figures 4 to 6, the sealed cabin 223 includes a sealing cover 2232 provided on the connecting frame 22, having a cabin body 2231 and a hatch 2233 covering the cabin body 2231, and a fourth sealing member (not shown) is provided between the sealing cover 2232 and the cabin body 2231.

[0208] The cabin body 2231 refers to a container with an opening, which is the hatch 2233. The sealing cover 2232 is provided on the cabin body 2231 and closes the hatch 2233. Optionally, the sealing cover 2232 is clamped on the cabin body 2231.

[0209] The fourth sealing member refers to a material or component used to prevent fluid or solid particles from invading the sealed chamber 223 from adjacent joint surfaces. Materials for the fourth sealing member include, but are not limited to, nitrile butadiene rubber, EPDM rubber, fluororubber, silicone rubber, fluorosilicone rubber, nylon, polyurethane, etc.

[0210] By configuring the sealed cabin 223 to include a cabin body 2231 and a sealing cover 2232 , and providing a fourth sealing member between the sealing cover 2232 and the cabin body 2231 , the sealing effect inside the sealed cabin 223 is ensured, thereby improving safety.

[0211] According to some embodiments of the present application, referring to FIG. 2 to FIG. 5 , the tray 2 further includes a bottom guard plate 26 , which is disposed on a side of the cooling plate 21 facing away from the battery cells 5 .

[0212] The bottom guard plate 22 is a component used to protect the cooling plate 21. In actual use, the bottom guard plate 22 is generally provided on the lower surface of the cooling plate 21, that is, the side facing away from the battery cell 5. Alternatively, the bottom guard plate 22 can be a plastic part, a metal part, etc.

[0213] The bottom guard plate 26 and the cooling plate 21 are fixedly arranged. Optionally, the bottom guard plate 26 and the cooling plate 21 are fastened together by a fourth fastener 71 .

[0214] By providing the bottom guard plate 22 , it is possible to effectively prevent the chassis from scraping against the ground during driving of the vehicle, thereby preventing the cooling plate 21 from being damaged or stones on the road from bouncing off and hitting the cooling plate 21 .

[0215] According to some embodiments of the present application, referring to FIG. 2 to FIG. 5 , a third sealing member 63 is provided between the bottom guard plate 26 and the cooling plate 21 .

[0216] The third seal 63 is a material or component used to prevent fluid or solid particles from invading the space between the bottom guard plate 26 and the cooling plate 21 from the adjacent joint surfaces. The material of the third seal 63 includes, but is not limited to, nitrile butadiene rubber, EPDM rubber, fluororubber, silicone rubber, fluorosilicone rubber, nylon, polyurethane, etc.

[0217] As an example, the third sealing member 63 is a sealing gasket, which is provided along the edge of the cooling plate 21. Of course, in other embodiments, the third sealing member 63 may also be a sealant or the like.

[0218] By providing the third sealing member 63 between the bottom guard plate 26 and the cooling plate 21 , external water vapor can be effectively blocked from invading the area between the bottom guard plate 26 and the cooling plate 21 , thereby improving the safety of the cooling plate 21 .

[0219] According to some embodiments of the present application, referring to FIG. 1 to FIG. 3 , the tray 2 is detachably connected to the chassis frame 1 .

[0220] The detachable connection methods include but are not limited to threaded connection, key connection, and pin connection.

[0221] 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.

[0222] According to some embodiments of the present application, referring to FIG. 1 to FIG. 3 , the tray 2 is threadedly connected to the chassis frame 1 .

[0223] As an example, the tray 2 is threadedly connected to the chassis frame 1 via a fifth fastener 72. Specifically, the fifth fastener 72 passes through the tray 2 and is connected to the chassis frame 1. The fifth fastener 72 may be, but is not limited to, a screw, a bolt, or the like.

[0224] 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.

[0225] According to some embodiments of the present application, referring to FIG. 2 , the floor 3 and the tray 2 are respectively located on opposite sides of the chassis frame 1 .

[0226] Typically, the chassis frame 1 has two opposite sides along its thickness direction, such as a first side and a second side, wherein the first side is the side of the chassis frame 1 close to the ground when in use, and the second side is the side away from the ground. Specifically, the tray 2 is located on the first side and the floor 3 is located on the second side.

[0227] It can be understood that the tray 2, chassis frame 1, and floor 3 are arranged sequentially from bottom to top. Because the tray 2 and floor 3 are connected to the chassis frame 1 and together define the accommodating cavity 4, during assembly, the chassis frame 1 and floor 3 can be assembled together before the tray 2 is assembled to the chassis frame 1. Similarly, during disassembly, the tray 2 can be removed from the chassis frame 1 independently.

[0228] By arranging the floor 3 and the tray 2 on opposite sides of the chassis frame 1, the tray 2, the chassis frame 1 and the floor 3 can form a bottom-up layout, which facilitates the installation and disassembly of the product.

[0229] According to some embodiments of the present application, the floor panel 3 is supported on the chassis frame 1 and welded to the chassis frame 1 .

[0230] Specifically, the floor panel 3 is supported on a side of the chassis frame 1 that is away from the ground.

[0231] By supporting the floor 3 on the chassis frame 1 and welding it to the chassis frame 1, the bearing capacity of the floor 3 can be improved, and the floor 2 can isolate the passenger compartment from the battery, thereby improving safety performance.

[0232] According to some embodiments of the present application, an insulating layer (not shown) is provided between the floor 3 and the battery cells 5 .

[0233] The insulating layer refers to a structural layer containing insulating material.

[0234] By providing an insulating layer between the floor 3 and the battery cells 5 , leakage is prevented and safety is improved.

[0235] According to some embodiments of the present application, the tray 2 is an aluminum part.

[0236] Aluminum parts refer to parts made of aluminum, which can be aluminum metal or aluminum alloy.

[0237] Because chassis frame 1 is connected to tray 2 and floor 3, they together define a housing cavity 4 that protects battery cells 5. The resulting overall structural strength is high, allowing tray 2 to be designed as an aluminum component. Aluminum components offer advantages such as light weight, high strength, and strong oxidation resistance. Using aluminum for tray 2 reduces its weight while increasing its strength and service life.

[0238] According to some embodiments of the present application, referring to FIG. 2 and FIG. 3 , the battery cell 5 is bonded to the cooling plate 21 .

[0239] 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.

[0240] 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.

[0241] According to some embodiments of the present application, referring to FIG. 2 to FIG. 3 , a heat-conducting structural adhesive layer 211 is provided on the surface of the cooling plate 21 , and the battery cells 5 are bonded to the cooling plate 21 via the heat-conducting structural adhesive layer 211 .

[0242] Thermally conductive structural adhesive layer 211 refers to a structural layer containing thermally conductive structural adhesive. Thermally conductive structural adhesive is a material used for heat conduction and structural reinforcement. Thermally conductive structural adhesive typically includes a thermally conductive material, a filler, and an adhesive. Thermally conductive structural 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.

[0243] By using the thermally conductive structural adhesive layer 211 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 .

[0244] According to some embodiments of the present application, referring to FIG. 5 , the cooling plate 21 is a liquid cooling plate, and a cooling liquid channel (not shown) for circulating cooling liquid is provided inside the liquid cooling plate.

[0245] A liquid cold plate is a component that uses liquid circulation to transfer heat. Specifically, the plate is internally provided with coolant channels for the circulation of coolant. As the coolant flows through these channels, heat is transferred. The coolant can be either water or oil.

[0246] 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.

[0247] According to some embodiments of the present application, referring to FIG. 1 , a chassis frame 1 includes a frame 11 and a transverse beam 12 provided on the frame 11 .

[0248] 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.

[0249] As an example, the tray 2 includes a connecting frame 22 and an isolation structure 23 mounted on the connecting frame 22. The chassis frame 1 is connected to the tray 2, specifically, the frame 11 is connected to the connecting frame 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.

[0250] 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.

[0251] 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 .

[0252] Referring to FIG. 9 , an embodiment of the present application further provides a vehicle 1000 , which includes the above-mentioned chassis assembly 100 .

[0253] 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.

[0254] 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.

[0255] 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.

[0256] 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.

[0257] 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.

[0258] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, 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, characterized in that: include: A chassis frame and a tray and a floor connected to the chassis frame, wherein the chassis frame, the tray and the floor cooperate to define a receiving cavity, the tray comprises 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, characterized in that: The tray further comprises a connection frame for connecting the chassis frame, the connection frame is connected to the cooling plate, and the plurality of battery cells are arranged in the connection frame.

3. The chassis assembly according to claim 2, characterized in that: The connecting frame is arranged on one side surface of the cooling plate along the edge of the cooling plate.

4. The chassis assembly according to claim 3, characterized in that: A first sealing member is sandwiched between the connecting frame and the cooling plate.

5. The chassis assembly according to any one of claims 2 to 4, characterized in that: The connecting frame comprises a frame and a connecting portion arranged at the periphery of the frame, the frame is used to abut against the chassis frame, and the connecting portion is used to be fixedly connected to the chassis frame.

6. The chassis assembly according to claim 5, characterized in that: A second sealing member is sandwiched between the frame and the chassis frame.

7. The chassis assembly according to claim 5 or 6, characterized in that: The connecting frame and the chassis frame are both configured as matching step structures at the connection point, wherein the contact surface between the frame and the chassis frame is higher than the contact surface between the connecting portion and the chassis frame.

8. The chassis assembly according to any one of claims 2 to 7, characterized in that: The tray further comprises an isolation structure arranged on the connecting frame, wherein the isolation structure divides the accommodating cavity into a plurality of sub-intervals, and at least one of the sub-intervals is used to accommodate and constrain the battery monomer.

9. The chassis assembly according to claim 8, characterized in that: The isolation structure includes at least one beam.

10. The chassis assembly according to claim 9, characterized in that The isolation structure further comprises at least one longitudinal beam, wherein the longitudinal beam is perpendicular to the transverse beam.

11. The chassis assembly according to any one of claims 8 to 10, characterized in that: The isolation structure is disposed on the cooling plate and is fixedly connected to the cooling plate.

12. The chassis assembly according to claim 11, characterized in that The isolation structure is sealed and connected to the cooling plate.

13. The chassis assembly according to any one of claims 8 to 12, characterized in that: The tray further comprises a connecting tube connected to the isolation structure and the cooling plate, and the connecting tube is further used to be connected to the chassis frame.

14. The chassis assembly according to claim 13, characterized in that A connecting head connected to the isolation structure is fixed on the connecting cylinder.

15. The chassis assembly according to claim 14, 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.

16. The chassis assembly according to claim 15, 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.

17. A chassis assembly according to any one of claims 8 to 16, characterized in that: The plurality of subsections include a first subsection and a second subsection, the battery cell being installed in the first subsection, and an electrical element being installed in the second subsection, the electrical element being electrically connected to the battery cell.

18. The chassis assembly according to claim 17, characterized in that The second sub-interval is defined by the connecting frame and the isolation structure.

19. The chassis assembly according to claim 18, characterized in that A sealed cabin is disposed on the connection frame, and a via hole connecting the second sub-interval and the sealed cabin is also disposed on the connection frame.

20. The chassis assembly according to claim 19, characterized in that The electrical component comprises a battery management unit, which is connected to the battery monomer via a first copper busbar. A connector is provided on the sealed cabin, and the battery management unit is connected to the connector via a second copper busbar passing through the via hole.

21. A chassis assembly according to claim 19 or 20, characterised in that The sealed cabin comprises a sealing cover which is arranged on the connecting frame and has a cabin body and a hatch of the cabin body, and a fourth sealing member is arranged between the sealing cover and the cabin body.

22. A chassis assembly according to any one of claims 1 to 21, characterised in that The tray further includes a bottom guard plate, which is disposed on a side of the cooling plate facing away from the battery cells.

23. The chassis assembly according to claim 22, characterized in that A third sealing member is provided between the bottom guard plate and the cooling plate.

24. A chassis assembly according to any one of claims 1 to 23, characterised in that The tray is detachably connected to the chassis frame.

25. The chassis assembly of claim 24, wherein: The tray is threadedly connected to the chassis frame.

26. A chassis assembly according to any one of claims 1 to 25, characterised in that The floor and the tray are respectively located on opposite sides of the chassis frame.

27. The chassis assembly of claim 26, wherein: The floor panel is supported on the chassis frame and welded to the chassis frame.

28. A chassis assembly according to claim 26 or 27, characterised in that An insulating layer is provided between the floor and the battery cells.

29. A chassis assembly according to any one of claims 1 to 28, characterised in that The tray is an aluminum part.

30. A chassis assembly according to any one of claims 1 to 29, characterised in that The battery cell is bonded to the cooling plate.

31. The chassis assembly of claim 30, wherein: 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.

32. A chassis assembly according to any one of claims 1 to 31, characterised 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.

33. A chassis assembly according to any one of claims 1 to 32, characterised in that The chassis frame includes a frame body and a transverse beam arranged on the frame body.

34. A vehicle, characterized in that: A chassis assembly comprising any one of claims 1 to 33.

35. The vehicle of claim 34, wherein: The vehicle includes a passenger compartment, and the floor of the chassis assembly is configured as a floor of the passenger compartment.

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