Side plate assembly, battery cell group, tray assembly, battery pack and electric device

Abstract

The present disclosure relates to the technical field of batteries, and specifically relates to a side plate assembly, a battery cell group, a tray assembly, a battery pack and an electric device. The side plate assembly comprises a side plate and an elastic structure, wherein the side plate is adapted to be connected to the end of a plurality of battery cells in the battery cell group; the elastic structure is connected to the side of the side plate away from the battery cells; and the elastic structure comprises a compression surface, which is configured to exert a preload force on the battery cells when compressed.

Description

Side panel assemblies, cell packs, tray assemblies, battery packs and electrical equipment

[0001] This disclosure claims priority to Chinese Patent Application No. 202520174553.2, filed on January 24, 2025, entitled “Side Panel Assembly, Cell Assembly, Tray Assembly, Battery Pack and Electrical Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of battery technology, and in particular to a side panel assembly, a cell assembly, a tray assembly, a battery pack, and an electrical device. Background Technology

[0003] Currently, with the continuous development of electric vehicles, the requirements for battery packs in electric vehicles are also constantly increasing. Therefore, battery packs are developing towards higher integration. However, because the cells in the battery pack need to be stacked and placed into a tray, there is a certain gap between the end cells and the tray. Due to the uneven gap between the end cells and the tray, the outer cells expand under uneven stress, which leads to the risk of lithium plating during high-rate charging and cannot guarantee cycle life.

[0004] In existing technologies, vacuum foam is typically filled into the large gaps on the sides. After the pallet is placed into the box, the foam is punctured and glue is injected to ensure "zero gap" between the large surface of the module and the pallet. However, this solution is complex in structure and operation. Summary of the Invention

[0005] This disclosure provides a side panel assembly, a cell assembly, a tray assembly, a battery pack, and an electrical device to at least solve one of the technical problems existing in the prior art.

[0006] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0007] On one hand, this disclosure provides a side panel assembly for a battery cell assembly, comprising:

[0008] Side plate, the side plate is adapted to be connected to the ends of multiple cells in a cell assembly;

[0009] The elastic structure is connected to the side of the side plate away from the battery cell;

[0010] The elastic structure includes a compression surface, which is used to generate a preload towards the battery cell when compressed.

[0011] In one possible implementation, the resilient structure includes:

[0012] The fixing part is connected to the side plate;

[0013] The extrusion section is connected to the side of the fixing section away from the side plate;

[0014] The extrusion section defines the extrusion surface.

[0015] In one possible implementation, the resilient structure also includes:

[0016] The support part is connected to the side of the fixing part away from the extrusion part and is located between the fixing part and the extrusion part;

[0017] The support portion is spaced apart from the extrusion portion and is used to support the extrusion portion when it is subjected to extrusion deformation.

[0018] In one possible implementation, the included angle between the support and the fixed part is α, where α satisfies: 100°≤a≤150°.

[0019] In one possible implementation, a satisfies: 130°≤a≤140°.

[0020] In one possible implementation, the maximum distance between the extrusion part and the fixing part along the direction perpendicular to the plane where the fixing part is located is L, where L satisfies: 9mm≤L≤13mm.

[0021] In one possible implementation, L satisfies: 10.5mm ≤ L ≤ 11.5mm.

[0022] In one possible implementation, the extrusion part is constructed as an arc-shaped part protruding away from the fixing part, and the extrusion surface is constructed as an arc-shaped surface.

[0023] In one possible implementation, the radius of the arc-shaped part is R, where R satisfies: 70mm≤R≤80mm.

[0024] In one possible implementation, the elastic structure is formed by stamping or bending a spring sheet.

[0025] In one possible implementation, the thickness of the spring sheet ranges from 0.4 mm to 0.6 mm.

[0026] In one possible implementation, the spring is made of spring steel.

[0027] In one possible implementation, the side panel is provided with a first buckle, which engages with the edge of the fixing part.

[0028] In one possible implementation, the first buckle has limit blocks on both sides, and the fixing part has a positioning edge that is engaged between the two limit blocks.

[0029] In one possible implementation, the fixing part includes two parts, with the two sides of the extrusion part connected to the fixing part in a one-to-one correspondence.

[0030] In one possible implementation, the side panel is provided with a plurality of second snaps, which are engaged with the two sides of the fixing part.

[0031] In one possible implementation, the side panel is provided with a third buckle, and the fixing part is provided with a slot, through which the third buckle passes and engages with the fixing part.

[0032] In one possible implementation, the elastic structure comprises multiple elastic structures, which are spaced apart along the extension direction of the side plate.

[0033] On the other hand, this disclosure provides a battery cell assembly, including a plurality of battery cells and at least one of the aforementioned side plate assemblies, wherein the plurality of battery cells are stacked sequentially, and along the stacking direction, the side plate is connected to at least one side of the stacked plurality of battery cells.

[0034] In another aspect, this disclosure provides a tray assembly for mounting battery cells, the tray assembly comprising:

[0035] The pallet is equipped with side beams;

[0036] The elastic structure is connected to the side of the side beam facing the battery cell;

[0037] The elastic structure includes a compression surface, which is used to generate a preload force toward the battery cell when the cell is loaded into the tray by the compression of the side beam.

[0038] Furthermore, this disclosure provides a battery pack, including a tray with side beams and the aforementioned battery cell assembly, wherein the battery cell assembly is installed within the tray, and the extrusion surface of the elastic structure abuts against the side beams; or

[0039] It includes multiple battery cells and the aforementioned tray assembly, with the extrusion surface of the elastic structure abutting against the battery cells located at the ends of the multiple battery cells.

[0040] In another aspect, this disclosure provides an electrical device including the aforementioned battery pack.

[0041] This disclosure provides a side panel assembly, a cell assembly, a tray assembly, a battery pack, and electrical equipment. By connecting an elastic structure to the side panel, the elastic structure undergoes a certain deformation under the pressure of the tray when the cell assembly is inserted into the tray, thereby providing a preload force towards the cell and meeting the cell preload requirements. The structure is simple and easy to operate. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 is one of the structural schematic diagrams of the side panel assembly provided in the embodiments of this disclosure;

[0044] Figure 2 is one of the structural schematic diagrams of the elastic structure of the side plate assembly shown in Figure 1;

[0045] Figure 3 is a second schematic diagram of the elastic structure of the side panel assembly shown in Figure 1;

[0046] Figure 4 is the third structural schematic diagram of the elastic structure of the side plate assembly shown in Figure 1;

[0047] Figure 5 is the fourth structural schematic diagram of the elastic structure of the side plate assembly shown in Figure 1;

[0048] Figure 6 is a second structural schematic diagram of the side panel assembly provided in an embodiment of this disclosure;

[0049] Figure 7 is a cross-sectional view of the side panel assembly shown in Figure 6 along AA;

[0050] Figure 8 is a cross-sectional view of the side panel assembly shown in Figure 6 along BB;

[0051] Figure 9 is a schematic diagram of the battery cell assembly provided in an embodiment of this disclosure;

[0052] Figure 10 is a partially exploded structural diagram of the battery pack provided in an embodiment of this disclosure;

[0053] Figure 11 is a schematic diagram of the cell assembly of the battery pack shown in Figure 10;

[0054] Figure 12 is a schematic diagram of the structure when the battery cells shown in Figure 11 are assembled into the tray;

[0055] Figure 13 is a schematic diagram of the structure of the battery cells shown in Figure 11 after they are assembled into the tray;

[0056] Figure 14 is a schematic diagram of the electrical equipment provided in the embodiments of this disclosure.

[0057] Explanation of reference numerals in the attached drawings: 100-Side panel assembly; 10-Side panel; 11-First buckle; 111-Limiting block; 12-Second buckle; 13-Third buckle; 20-Elastic structure; 21-Fixing part; 211-Positioning edge; 212-Clamping opening; 22-Extrusion part; 221-Extrusion surface; 23-Support part; 200-Cell assembly; 201-Cell; 300-Battery pack; 301-Tray; 302-Side beam; 400-Tray assembly; 500-Electrical equipment. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0059] Currently, with the continuous development of electric vehicles, the requirements for battery packs in electric vehicles are also constantly increasing. Therefore, battery packs are developing towards higher integration. However, because the cells in the battery pack need to be stacked and placed into a tray, there is a certain gap between the end cells and the tray. Due to the uneven gap between the end cells and the tray, the outer cells expand under uneven stress, which leads to the risk of lithium plating during high-rate charging and cannot guarantee cycle life.

[0060] In existing technologies, vacuum foam is typically filled into the large gaps on the sides. After the pallet is placed into the box, the foam is punctured and glue is injected to ensure "zero gap" between the large surface of the module and the pallet. However, this solution is complex in structure and operation.

[0061] To overcome the shortcomings of existing technologies, after repeated consideration and verification, the inventors discovered that if a spring is placed between the tray and the battery cell, and the spring is squeezed by the tray side beam and the battery cell when the battery cell is installed in the tray, it will produce a certain deformation. This allows the spring to provide a certain preload to the battery cell, meeting the preload requirements. Furthermore, the preload provided by the spring is relatively uniform, which helps to provide a uniform pressure distribution between the battery cell and the tray, thereby reducing the risk of lithium plating during charging and reducing the problem of uneven stress on the battery cell expansion. This improves the cycle life and safety of the battery, and the structure is simple and easy to operate.

[0062] In view of this, the present disclosure provides a side panel assembly for a battery cell assembly, comprising:

[0063] Side plate, the side plate is adapted to be connected to the ends of multiple cells in a cell assembly;

[0064] The elastic structure is connected to the side of the side plate away from the battery cell;

[0065] The elastic structure includes a compression surface, which is used to generate a preload towards the battery cell when compressed by the tray.

[0066] By connecting an elastic structure to the side plate, the elastic structure is compressed by the tray when the battery cell is assembled into the tray, and thus generates a certain deformation, thereby providing a pre-tightening force towards the battery cell, which meets the requirements of the battery cell pre-tightening force. The structure is simple and easy to operate.

[0067] The contents of this disclosure will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this disclosure.

[0068] The following sections provide a detailed description of the specific structure of the side panel assembly and various possible implementation methods.

[0069] Figure 1 is one of the structural schematic diagrams of the side panel assembly provided in the embodiments of this disclosure. Figure 2 is one of the structural schematic diagrams of the elastic structure of the side panel assembly shown in Figure 1. Figure 3 is another structural schematic diagram of the elastic structure of the side panel assembly shown in Figure 1. Figure 4 is a third structural schematic diagram of the elastic structure of the side panel assembly shown in Figure 1. Figure 5 is a fourth structural schematic diagram of the elastic structure of the side panel assembly shown in Figure 1. Figure 6 is another structural schematic diagram of the side panel assembly provided in the embodiments of this disclosure. Figure 7 is a cross-sectional view of the side panel assembly shown in Figure 6 along AA. Figure 8 is a cross-sectional view of the side panel assembly shown in Figure 6 along BB. Figure 9 is a structural schematic diagram of the cell assembly provided in the embodiments of this disclosure. Figure 10 is a partially exploded structural schematic diagram of the battery pack provided in the embodiments of this disclosure. Figure 11 is a structural schematic diagram of the cell assembly of the battery pack shown in Figure 10. Figure 12 is a structural schematic diagram of the cell assembly shown in Figure 11 when it is placed into the tray. Figure 13 is a structural schematic diagram of the cell assembly shown in Figure 11 after it is placed into the tray.

[0070] As shown in Figures 1 and 6, the side panel assembly 100 provided in this embodiment is used for the battery cell assembly 200. The battery cell assembly 200 can be installed in the tray 301 to form a battery pack 300.

[0071] The side plate assembly 100 includes a side plate 10 and an elastic structure 20. As shown in FIG9, the side plate 10 is adapted to be connected to the ends of a plurality of battery cells 201 in the battery cell assembly 200. The elastic structure 20 is connected to the side of the side plate 10 away from the battery cells 201.

[0072] As shown in Figures 12 and 13, the elastic structure 20 includes a pressing surface 221. The pressing surface 221 is used to generate a pre-tightening force towards the battery cell 201 when the battery cell assembly 200 is placed into the tray 301 and is pressed by the tray 301.

[0073] Optionally, the battery cell assembly 200 is inserted into the tray 301 by inverting it. When it is inserted inverted, the elastic structure 20 is compressed by the side beam 302 of the tray 301, causing the compression surface 221 of the elastic structure 20 to deform to a certain extent, thereby generating a pre-tightening force perpendicular to the large surface of the battery cell 201.

[0074] When the cell assembly 200 is placed into the tray 301, the elastic structure 20 is compressed by the side beam 302, generating a preload force towards the cell 201. Since the elastic structure 20 is connected to the side plate 10, the generated preload force is evenly distributed to the cell 201 through the side plate 10. This uniform preload force helps ensure the stability of the cell 201 in the tray 301, reducing movement and stress concentration of the cell 201 during charging and discharging. Furthermore, by providing a uniform pressure distribution to the cell 201, the problem of uneven expansion stress on the cell 201 can be reduced, thereby lowering the risk of lithium plating and helping to improve the cycle life and overall performance of the battery pack 300, especially under high-rate charging conditions.

[0075] Furthermore, because the elastic structure 20 can automatically adjust the preload, it reduces the need for precise control of the gap between the cell and the tray, thereby simplifying the assembly process of the battery pack 300 and reducing manufacturing costs and time. At the same time, the elastic structure 20 can be adjusted according to different cell 201 and tray 301 designs to adapt to different battery pack 300 specifications.

[0076] In one possible implementation, the side plate 10 is connected to the large surface of the battery cell 201.

[0077] Optionally, the side plate 10 is attached to the large surface of the battery cell 201 using double-sided adhesive or other connecting materials.

[0078] As shown in Figures 2 and 3, in one possible implementation, the elastic structure 20 includes a fixing part 21 and a pressing part 22. The fixing part 21 is connected to the side plate 10. The pressing part 22 is connected to the side of the fixing part 21 away from the side plate 10. The pressing part 22 defines a pressing surface 221.

[0079] The extrusion section 22 is used to deform under the pressure of the side beam 302 when the battery cell assembly 200 is loaded into the tray 301, so as to provide a preload force toward the battery cell 201.

[0080] The design of the extrusion section 22 enables the elastic structure 20 to distribute and transmit force evenly when it is squeezed by the side beam 302 of the tray 301, which helps to apply a uniform preload force to the cell 201, thereby reducing the risk of stress concentration and deformation of the cell 201.

[0081] Meanwhile, the arc shape of the extrusion section 22 naturally possesses good elasticity and deformation capacity. When subjected to extrusion, the extrusion section 22 can effectively deform and store energy, then convert it into a preload force on the battery cell 201, providing sufficient elasticity without damaging the material. Furthermore, the deformation of the extrusion section 22 is achieved through a smooth curve, rather than through sharp angles, which can reduce material fatigue and wear of the elastic structure 20, improving the durability and service life of the side plate assembly 100.

[0082] The extrusion section 22 can also automatically adjust its deformation according to different extrusion forces, thereby adapting to different cell 201 thicknesses and tray 301 designs, helping to maintain consistent performance under various assembly conditions. At the same time, the compact design of the extrusion section 22 can provide effective flexibility within a limited space, thereby optimizing the space utilization inside the battery pack 300.

[0083] The magnitude of the preload can be adjusted according to the material, thickness, deformation, and assembly gap of the elastic structure 20 to achieve the initial preload requirement.

[0084] In one possible implementation, the elastic structure 20 further includes a support portion 23. The support portion 23 is connected to the side of the fixing portion 21 away from the pressing portion 22 and is located between the fixing portion 21 and the pressing portion 22. The support portion 23 is spaced apart from the pressing portion 22 and is used to support the pressing portion 22 when it is subjected to compression deformation.

[0085] The design of the support portion 23 provides additional support when the extrusion portion 22 is compressed, preventing excessive deformation or instability of the extrusion portion 22, thereby helping to maintain the overall stability and functionality of the elastic structure 20. By supporting and limiting excessive deformation of the extrusion portion 22 through the support portion 23, stress is dispersed, stress concentration on the extrusion portion 22 is reduced, the risk of material fatigue and breakage is lowered, and the service life of the elastic structure 20 is extended.

[0086] Meanwhile, the support portion 23 can also help control the degree of deformation of the extrusion portion 22, ensuring that the extrusion portion 22 can deform within a predetermined range when subjected to extrusion by the side beam 302, which helps to provide a consistent preload. The support portion 23 can also more effectively transfer the extrusion force to the fixing portion 21 and the side plate 10 during the extrusion process of the extrusion portion 22, ensuring the uniformity and effectiveness of the preload, optimizing the force transmission path, and improving the overall efficiency.

[0087] The support section 23 can also be flexibly designed and adjusted according to specific application requirements to adapt to different cell 201 and tray 301 configurations, thereby optimizing the performance of the elastic structure 20.

[0088] In one possible implementation, when the extrusion part 22 deforms, the extrusion part 22 flattens and gradually contacts the support part 23, resisting the support part 23 to undergo a certain deformation, thereby providing support force, keeping the middle part of the extrusion part 22 adequately supported, and providing a certain elasticity.

[0089] In one possible implementation, the included angle between the support part 23 and the fixing part 21 is α, where α satisfies: 100°≤a≤150°.

[0090] The angle between the support portion 23 and the fixing portion 21 directly affects the force transmission path and distribution of the extrusion portion 22 after extrusion deformation. The angle range of 100° to 150° is the result of experimental and computational optimization, which can provide the best force transmission efficiency and uniform force distribution when the extrusion portion 22 is under stress. At the same time, the angle between the support portion 23 and the fixing portion 21 of 100° to 150° can provide the best geometric stability, preventing unnecessary deformation or instability of the support portion 23 and the fixing portion 21 when under stress, thereby maintaining the overall stability of the elastic structure 20 and improving the safety of the battery pack 300, reducing the risk of cell 201 movement or damage due to structural failure.

[0091] Furthermore, by limiting the included angle to between 100° and 150°, the deformation behavior of the support part 23 and the extrusion part 22 can be controlled more precisely, which helps to ensure that the extrusion part 22 can deform within a predetermined range when subjected to extrusion by the side beam 302, thereby providing a consistent preload.

[0092] By limiting the included angle to between 100° and 150°, it helps to disperse the stress between the support part 23 and the fixing part 21, reduce the stress concentrated at a certain point, thereby reducing the risk of material fatigue and damage of the elastic structure 20 and extending the service life of the elastic structure 20.

[0093] In one possible implementation, a satisfies: 130°≤a≤140°.

[0094] In one possible implementation, the maximum distance between the extrusion part 22 and the fixing part 21 along the direction perpendicular to the plane where the fixing part 21 is located is L, where L satisfies: 9mm≤L≤13mm.

[0095] The maximum distance between the extrusion section 22 and the fixing section 21 directly affects the magnitude of the preload force of the extrusion section 22 during extrusion deformation. A distance range of 9mm to 13mm ensures that the extrusion section 22 has sufficient elasticity and deformation capacity to provide the required preload force. Furthermore, it ensures that the extrusion section 22 will not deform excessively under stress, thus providing optimal elastic response without damaging the extrusion section 22, maintaining the stability and functionality of the elastic structure 20. Simultaneously, this distance range also helps to disperse stress, reducing stress concentration in the extrusion section 22, thereby reducing the risk of material fatigue and breakage, and extending the service life of the elastic structure 20.

[0096] In one possible implementation, L satisfies: 10.5mm ≤ L ≤ 11.5mm.

[0097] In one possible implementation, the extrusion portion 22 is configured as an arc-shaped portion protruding away from the fixing portion 21, and the extrusion surface 221 is configured as an arc-shaped surface.

[0098] In one possible implementation, the radius of the arc-shaped part is R, where R satisfies: 70mm≤R≤80mm.

[0099] The radius of the arc-shaped portion directly affects the uniformity of deformation of the extrusion section 22 during the extrusion deformation process. A radius range of 70mm to 80mm provides a gentler curvature, which helps to achieve more uniform deformation under stress and provides sufficient elastic response without damaging the material, thereby effectively applying preload. A radius of 70mm to 80mm also helps to optimize the force transmission path, enabling the extrusion section 22 to effectively transmit force to the battery cell 201 when subjected to extrusion, ensuring the uniformity and effectiveness of the preload. Simultaneously, the gentle curvature reduces stress concentration points on the extrusion section 22, making it more stable under stress, preventing material fatigue and breakage, improving the overall structural durability, and extending the service life of the elastic structure 20.

[0100] Optionally, the radius of the curved section of the wall is 75 mm.

[0101] In one possible implementation, the elastic structure is formed by stamping or bending a spring sheet.

[0102] Stamping and bending are efficient and economical manufacturing processes suitable for mass production, significantly reducing manufacturing costs while increasing production speed. Simultaneously, stamping and bending processes enable high-precision dimensional control, producing parts close to their final shape, reducing the need for subsequent processing, and ensuring the consistency and reliability of each elastic structure 20, which is particularly important for clearances requiring tight tolerances. Furthermore, stamping and bending allow for the realization of complex geometries, enabling designers to optimize the shape and function of the elastic structure 20 according to specific needs. By adjusting appropriate process parameters, stamping and bending can improve the mechanical properties of materials, such as increasing strength and elasticity. This contributes to improving the durability and functionality of the elastic structure 20. Stamping and bending processes are also applicable to a variety of materials, including metals and certain high-strength plastics, allowing designers to select the most suitable material based on application requirements.

[0103] In one possible implementation, the thickness of the spring sheet ranges from 0.4 mm to 0.6 mm.

[0104] The thickness of the spring sheet directly affects the elasticity of the elastic structure 20. A spring sheet in the range of 0.4mm to 0.6mm provides good elasticity, allowing it to deform appropriately under stress, thereby effectively applying preload. This provides optimal elastic response without damaging the material, while ensuring sufficient strength to withstand repeated mechanical stresses without premature fatigue or breakage, extending the service life of the elastic structure 20. By selecting a thickness of 0.4mm to 0.6mm, the force applied by the spring sheet can be more precisely controlled, ensuring consistent preload and thus guaranteeing the stability of the battery cell 201 in the tray 301. The thinner thickness of 0.4mm to 0.6mm reduces the amount of spring sheet material used, thereby lowering costs. At the same time, this thickness range still provides the required mechanical properties, achieving a balance between performance and cost. Furthermore, within the 0.4mm to 0.6mm thickness range, the spring sheet is easy to process and form through processes such as stamping and bending, simplifying the manufacturing process and improving production efficiency.

[0105] Optionally, the thickness of the spring is 0.5mm.

[0106] In one possible implementation, the spring is made of spring steel.

[0107] Spring steel possesses excellent elasticity and resilience, rapidly returning to its original shape after being subjected to stress. It also exhibits high strength, wear resistance, and excellent fatigue resistance, enabling it to withstand significant mechanical stress without permanent deformation. Furthermore, it maintains stable performance under cyclic stress conditions, ensuring the spring retains its functionality and reliability over extended periods of use. Many spring steel alloys also demonstrate good corrosion resistance, making them suitable for use in various environments and reducing performance degradation and maintenance requirements caused by corrosion. Spring steel is also easily processed into desired shapes and sizes through stamping, bending, and other techniques, contributing to improved production efficiency and reduced manufacturing costs.

[0108] In other possible implementations, the spring can also be made of other materials, such as elastic polymers, and can be in various geometries, such as corrugated or bent, to achieve the desired elastic properties.

[0109] As shown in Figure 6, in one possible implementation, the side plate 10 is provided with a first buckle 11, which is engaged with the edge of the fixing part 21.

[0110] By using snap-fit ​​connections, the resilient structure 20 can be quickly and easily installed onto the side plate 10, reducing installation time and complexity and improving production efficiency. Simultaneously, the snap-fit ​​design provides a robust mechanical connection, preventing the resilient structure 20 from loosening or falling off during use, thus maintaining the overall structural integrity of the battery pack 200. When replacement or maintenance of the resilient structure 20 is required, the snap-fit ​​connection facilitates disassembly and reinstallation, reducing maintenance time and costs and improving system maintainability. Compared to bolt or welded connections, the snap-fit ​​design typically requires fewer materials and manufacturing steps, thereby reducing overall costs. The snap-fit ​​can also adapt to different edges of the fixing part 21 and the side plate 10, designed in various shapes and sizes, allowing for optimized connection between the resilient structure 20 and the side plate 10 in different application scenarios.

[0111] As shown in Figures 4 and 7, in one possible implementation, the first buckle 11 is provided with limiting blocks 111 on both sides, and the fixing part 21 is provided with a positioning edge 211, which is engaged between the two limiting blocks 111.

[0112] The positioning edge 211 engages between the two limiting blocks 111, providing multiple fixing points to prevent the fixing part 21 from shifting laterally or rotating during use. This ensures the component remains stable under vibration or impact conditions, thereby improving the overall safety of the system. The positioning edge 211, located between the limiting blocks 111, ensures precise positioning of the fixing part 21 during installation, helping to maintain the alignment and functional consistency of the entire system. Furthermore, the positioning edge 211 and the limiting blocks 111 provide clear physical constraints and positioning references, simplifying the assembly process, reducing the possibility of installation errors, and improving production efficiency.

[0113] In one possible implementation, the fixing part 21 includes two parts, and the two sides of the pressing part 22 are connected to the fixing part 21 in a one-to-one correspondence.

[0114] By providing fixing parts 21 on both sides of the extrusion section 22, a symmetrical support structure is provided, which helps to improve the stability of the elastic structure 20 and prevents tilting or uneven deformation under stress. At the same time, the design of the two fixing parts 21 ensures that the force applied to the extrusion section 22 is evenly distributed throughout the elastic structure 20, reducing stress concentration and lowering the risk of material fatigue. By increasing the connection points, the two fixing parts 21 provide a stronger mechanical connection, improving the durability and reliability of the elastic structure 20. The fixing parts 21 on both sides of the extrusion section 22 can better control elastic deformation, enabling the extrusion section 22 to provide a consistent elastic response under stress.

[0115] The design of the two fixed parts 21 can also simplify the assembly process, reduce the possibility of assembly errors, and improve production efficiency.

[0116] In one possible implementation, the side plate 10 is provided with a plurality of second buckles 12, which are engaged with the two sides of the fixing part 21.

[0117] In one possible implementation, the first latch 11 is engaged with the edge of one of the fixing parts 21, and the second latch 12 is engaged with the edge of the other fixing part 21.

[0118] By providing snap fasteners on the two fixing parts 21, multi-point fixation is provided, which helps to improve the stability of the overall structure and prevents the elastic structure 20 from loosening or shifting during use. At the same time, the two snap fasteners connect the two fixing parts 21 respectively, ensuring that the force applied to the pressing part 22 can be evenly distributed, reducing stress concentration and lowering the risk of material fatigue and damage.

[0119] Optionally, the second buckle 12 is configured as a through structure, ensuring that the fixed part 21 connected to the elastic structure 20 can move linearly on the large surface of the side plate 10 during the assembly of the elastic structure 20 and the inversion of the pallet 301. The limiting block 111 on the first buckle 11 cooperates with the positioning edge 211 on the fixed part 21 to ensure that the fixed part 21 connected to the elastic structure 20 restricts its position during the assembly of the elastic structure 20 and the inversion of the pallet 301, so that the fixed part 21 does not slide.

[0120] As shown in Figures 5 and 8, in one possible implementation, the side plate 10 is provided with a third buckle 13, and the fixing part 21 is provided with a slot 212. The third buckle 13 passes through the slot 212 and is engaged with the fixing part 21.

[0121] The third clip 13 is connected via the bayonet 212, providing a secure mechanical fixation and ensuring that the elastic structure 20 will not loosen or shift during use, thus improving the overall structural stability. The use of clips and bayonets enables quick, tool-free assembly, reducing installation time and complexity and improving production efficiency.

[0122] In one possible implementation, the latch 212 is located in the middle of the fixing part 21, so that the first latch 11, the second latch 12 and the third latch 13 cooperate to stably fix the elastic structure 20 to the side plate 10.

[0123] In one possible implementation, the elastic structure 20 includes a plurality of elastic structures 20 arranged at intervals along the extension direction of the side plate 10.

[0124] The spaced arrangement of multiple elastic structures 20 helps to evenly distribute the applied force across the entire side plate 10, reducing stress concentration and lowering the risk of material fatigue and damage. By providing multiple elastic structures 20 on the side plate 10, multi-point support is provided, improving the overall structural stability and preventing tilting or uneven deformation during use. Simultaneously, the multiple elastic structures 20 can adapt to different load and vibration conditions, providing better cushioning and shock absorption. The spaced arrangement of the elastic structures 20 allows for better response to external pressure and deformation, providing a consistent elastic response, thus facilitating the assembly of the battery pack 300, where precise control of preload application is required. The spaced arrangement design also allows for adjustments to the number, spacing, and position of the elastic structures 20 according to specific application needs, optimizing performance and adapting to different structural requirements.

[0125] In one possible implementation, multiple elastic structures 20 are evenly arranged along the extension direction of the side plate 10, thereby providing a more uniform elastic preload.

[0126] In one possible implementation, the initial preload of the cell 201 in the battery pack 300 needs to be between 10N and 2370N, and the theoretical gap between the cell 201 and the tray 301 is between 5.72mm and 8.82mm.

[0127] The compression section 22 of the elastic structure 20 can be compressed from 11mm to 7.27mm. At this time, each elastic structure 20 provides a force of 116N to 442N to the large surface of the cell 201. The preload provided by the three elastic structures 20 is 348N to 1326N, which meets the initial preload requirements.

[0128] The side panel assembly 100 provided in this embodiment includes a side panel 10 and an elastic structure 20. The side panel 10 is connected to the battery cell 201 in the battery cell assembly 200. The elastic structure 20 is connected to the side of the side panel 10 away from the battery cell 201. The elastic structure 20 is used to generate a preload force toward the battery cell 201 when the battery cell assembly 200 is loaded into the tray 301 and is squeezed by the side beam 302 of the tray 301.

[0129] By connecting the elastic structure 20 to the side plate 10, the elastic structure 20 is subjected to compression by the side beam 302 of the tray 301 when the cell assembly 200 is placed into the tray 301, resulting in a certain deformation. This provides a preload force towards the cell 201, meeting the preload requirements of the cell 201. Since the elastic structure 20 is connected to the side plate 10, the generated preload force is evenly distributed to the cell 201 through the side plate 10. This uniform preload force helps ensure the stability of the cell 201 in the tray 301, reducing the movement and stress concentration of the cell 201 during charging and discharging. Furthermore, by providing a uniform pressure distribution to the cell 201, the problem of uneven expansion stress on the cell 201 can be reduced, thereby reducing the risk of lithium plating and helping to improve the cycle life and overall performance of the battery pack 300, especially under high-rate charging conditions.

[0130] Furthermore, as shown in FIG9, this embodiment of the present disclosure also provides a battery cell assembly 200, including a plurality of battery cells 201 and at least one of the aforementioned side plate assemblies 100. The plurality of battery cells 201 are stacked sequentially, and along the stacking direction, the side plate 10 is connected to at least one side of the stacked plurality of battery cells 201.

[0131] In one possible implementation, side plates 10 are provided on both sides of the stacked multiple cells 201 along the stacking direction.

[0132] Furthermore, this disclosure also provides a tray assembly 400 for mounting battery cells 201. The tray assembly 400 includes a tray 301 and an elastic structure 20. The tray 301 is provided with a side beam 302. The elastic structure 20 is connected to the side of the side beam 302 facing the battery cell 201. The elastic structure 20 includes a pressing surface 221, which is used to generate a preload force towards the battery cell 201 when the battery cell 201 is loaded into the tray 301 by the pressing of the side beam 302.

[0133] In this case, multiple battery cells 201 are stacked sequentially in tray 301.

[0134] Similar to the side panel assembly 100, the elastic structure 20 is compressed by the side beam 302 when the cell 201 is inserted into the tray 301, generating a preload force towards the cell 201. This provides a uniformly distributed preload force to the cell 201, which helps ensure the stability of the cell 201 in the tray assembly 400 and reduces movement and stress concentration of the cell 201 during charging and discharging. Furthermore, by providing a uniform pressure distribution to the cell 201, the problem of uneven expansion stress on the cell 201 can be reduced, thereby reducing the risk of lithium plating and helping to improve the cycle life and overall performance of the battery pack 300, especially under high-rate charging conditions.

[0135] Furthermore, as shown in Figure 10, this disclosure provides a battery pack 300, including a tray 301 and the aforementioned cell assembly 200. The tray 301 is provided with a side beam 302. The cell assembly 200 is installed inside the tray 301, and the pressing surface 221 of the elastic structure 20 abuts against the side beam 302.

[0136] The specific structure, working principle and function of the battery pack 200 have been described in detail in the foregoing embodiments, and will not be repeated here.

[0137] As shown in Figure 11, the side plate assembly 100 with the elastic structure 20 is installed on both sides of the cell assembly 200. As shown in Figures 12 and 13, after the cell assembly 200 is stacked, the tray 301 is inverted and flipped. During the downward movement of the tray 301, the side beam 302 of the tray 301 compresses the elastic structure 20, causing the elastic structure 20 to generate a force perpendicular to the large surface of the cell 201. Thus, after the flipping is completed, the elastic structure 20 is compressed, and the cell 201 is subjected to the preload force of the elastic structure 20.

[0138] In one possible implementation, the battery pack 300 may further include a plurality of battery cells 201 and the aforementioned tray assembly 400. The compression surface 221 of the elastic structure 20 abuts against the end cells 201 of the plurality of battery cells 201.

[0139] As shown in Figure 14, this embodiment of the present disclosure also provides an electrical device 500, including the battery pack 300 described above. The electrical device 500 also includes an electrical appliance. The battery pack 300 is used to provide electrical energy to the electrical appliance.

[0140] In this embodiment, the electrical device 500 can be a vehicle, such as a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle, and a new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. Accordingly, the electrical device can be the vehicle's drive mechanism or the vehicle's control system.

[0141] In addition, electrical equipment 500 can also be other equipment, such as mobile phones, portable devices, laptops, electric toys, power tools, ships and spacecraft, among which spacecraft can include airplanes, rockets, space shuttles or spacecraft.

[0142] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0143] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0144] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0145] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A side panel assembly (100), characterized in that, For use in battery cell packs (200), including: Side plate (10), the side plate (10) being adapted to be connected to the ends of a plurality of cells (201) in the cell assembly (200); An elastic structure (20) is connected to the side of the side plate (10) away from the battery cell (201); The elastic structure (20) includes a compression surface (221) for generating a preload force toward the battery cell (201) when compressed.

2. The side panel assembly (100) according to claim 1, characterized in that, The elastic structure (20) includes: A fixing part (21) is connected to the side plate (10); An extrusion part (22) is connected to the side of the fixing part (21) away from the side plate (10); The extrusion section (22) defines the extrusion surface (221).

3. The side panel assembly (100) according to claim 2, characterized in that, The elastic structure (20) further includes: A support portion (23) is connected to the side of the fixing portion (21) away from the extrusion portion (22) and is located between the fixing portion (21) and the extrusion portion (22); The support portion (23) is spaced apart from the extrusion portion (22) and is used to support the extrusion portion (22) when it is subjected to extrusion deformation.

4. The side panel assembly (100) according to claim 3, characterized in that, The included angle between the support part (23) and the fixing part (21) is α, where α satisfies: 100°≤a≤150°.

5. The side panel assembly (100) according to claim 4, characterized in that, a satisfies: 130°≤a≤140°.

6. The side panel assembly (100) according to claim 2, characterized in that, Along the direction perpendicular to the plane where the fixing part (21) is located, the maximum distance between the extrusion part (22) and the fixing part (21) is L, where L satisfies: 9mm≤L≤13mm.

7. The side panel assembly (100) according to claim 6, characterized in that, L satisfies: 10.5mm≤L≤11.5mm.

8. The side panel assembly (100) according to claim 2, characterized in that, The extrusion part (22) is constructed as an arc-shaped part protruding away from the fixing part (21), and the extrusion surface (221) is constructed as an arc-shaped surface.

9. The side panel assembly (100) according to claim 8, characterized in that, The radius of the arc-shaped part is R, where R satisfies: 70mm≤R≤80mm.

10. The side panel assembly (100) according to claim 1, characterized in that, The elastic structure (20) is formed by stamping or bending of a spring sheet.

11. The side panel assembly (100) according to claim 10, characterized in that, The thickness of the spring sheet ranges from 0.4mm to 0.6mm.

12. The side panel assembly (100) according to claim 10, characterized in that, The spring is made of spring steel.

13. The side panel assembly (100) according to claim 2, characterized in that, The side plate (10) is provided with a first buckle (11), which is engaged with the edge of the fixing part (21).

14. The side panel assembly (100) according to claim 13, characterized in that, The first buckle (11) has limiting blocks (111) on both sides, and the fixing part (21) has a positioning edge (211) which is engaged between the two limiting blocks (111).

15. The side panel assembly (100) according to claim 2, characterized in that, The fixing part (21) includes two parts, and the two sides of the pressing part (22) are connected to the fixing part (21) one by one.

16. The side panel assembly (100) according to claim 2, characterized in that, The side plate (10) is provided with a plurality of second buckles (12), which are engaged with the two sides of the fixing part (21).

17. The side panel assembly (100) according to claim 2, characterized in that, The side plate (10) is provided with a third buckle (13), and the fixing part (21) is provided with a slot (212). The third buckle (13) passes through the slot (212) and is engaged with the fixing part (21).

18. The side panel assembly (100) according to any one of claims 1-17, characterized in that, The elastic structure (20) includes a plurality of elastic structures (20) arranged at intervals along the extension direction of the side plate (10).

19. A battery cell assembly (200), characterized in that, The assembly includes a plurality of battery cells (201) and at least one side plate assembly (100) as described in any one of claims 1-18, wherein the plurality of battery cells (201) are stacked sequentially, and the side plate (10) is connected to at least one side of the stacked plurality of battery cells (201) along the stacking direction.

20. A tray assembly (400), characterized in that, For mounting battery cells (201), the tray assembly (400) includes: The pallet (301) is equipped with side beams (302); An elastic structure (20) is connected to the side of the side beam (302) facing the battery cell (201); The elastic structure (20) includes a compression surface (221), which is used to generate a pre-tightening force toward the battery cell (201) when the battery cell (201) is inserted into the tray (301) by the compression of the side beam (302).

21. A battery pack (300), characterized in that, Includes a tray (301) having a side beam (302), and a battery cell assembly (200) as described in claim 19, the battery cell assembly (200) being installed within the tray (301), the extrusion surface (221) of the elastic structure (20) abutting against the side beam (302); or The assembly includes a plurality of battery cells (201) and a tray assembly (400) as claimed in claim 20, wherein the compression surface (221) of the elastic structure (20) abuts against the end of the plurality of battery cells (201).

22. An electrical appliance (500), characterized in that, Includes the battery pack (300) as described in claim 21.

Images