Battery device and electric appliance

Abstract

The application relates to a battery device and an electric appliance, wherein the battery device comprises a box assembly (10), a plurality of battery monomers (3) and a supporting assembly (4), the box assembly (10) comprises a box (1) and a cover (2), the cover (2) is used for sealing an opening of the box (1) and is connected with the box (1), the box (1) comprises a containing part (11) and at least one structural beam (12) arranged in the containing part (11), the supporting assembly (4) is fixed to the structural beam (12) at least at one end along a first direction (x) and comprises a main body part (41), the main body part (41) is arranged between the cover (2) and at least part of the battery monomers (3) along a third direction (z), the main body part (41) comprises a plurality of rib strips connected to form a hollow structure, the supporting assembly (4) has a preset distance from the battery monomers (3), and the first direction (x) and the third direction (z) are arranged in intersection. The battery device can improve working reliability.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and electrical equipment. Background Technology

[0002] Due to the advantages of lithium-ion batteries, such as high energy density, high power density, high cycle life, and long storage time, they have been widely used in new energy electric vehicles.

[0003] In some battery devices, support strips are installed between the individual battery cells and the cover of the casing assembly to provide support and improve the device's resistance to being stepped on. However, the battery devices still suffer from low reliability during use. Utility Model Content

[0004] The purpose of this application is to improve the operational reliability of battery devices.

[0005] According to a first aspect of this application, a battery device is provided, comprising: A housing assembly includes a housing and a cover, the housing having an opening, the cover closing the opening and being connected to the housing, the housing including a receiving element and at least one structural beam disposed within the receiving element; Multiple battery cells are housed within the enclosure assembly; and The support component is fixed to the housing and at least one end of it is fixed to the structural beam along the first direction. The support component includes a main body, which is disposed between the cover and at least a portion of the battery cells along the third direction. The main body includes multiple ribs, which are connected to each other to form a hollow structure. The support component and the battery cells have a preset distance between them, and the first direction and the third direction are intersected.

[0006] This embodiment, by providing a support assembly between the cover and at least some of the battery cells, and fixing the support assembly to the housing, allows the housing assembly to reliably provide support when subjected to external impacts, such as being stepped on. This effectively prevents the cover from undergoing large inward deformation, and the force is directly transmitted to the housing through the support assembly, bypassing the battery cells. This optimizes the force transmission path of the impact, preventing the battery cells from being deformed or damaged internally, and avoiding any impact on the performance of the battery cells, thereby improving the operational reliability of the battery device. Furthermore, aligning the electrode terminals and busbars of the battery cells towards the cover also reduces the possibility of short circuits.

[0007] Furthermore, the impact force on the housing assembly can be dispersed through multiple ribs, improving the impact resistance of the housing assembly. The hollow structure of the main body can reduce weight while minimizing impact and is also conducive to heat dissipation of the individual battery cells. This layout can make full use of the gap space between the cover and the individual battery cells, resulting in a compact structure, and the hollow structure of the main body facilitates heat dissipation of multiple battery cells.

[0008] Furthermore, fixing at least one end of the support component along the first direction to the structural beam facilitates the placement of the support component in localized areas based on the actual impact force distribution, or allows for the installation of multiple independent support components. It also facilitates the installation and fixing of the support components without requiring fixation to the side walls of the enclosure, enabling flexible design of the support component's coverage area. Moreover, the impact force received by the enclosure components can be transferred to the structural beam through the support components, preventing compression or damage to the battery cells and improving the reliability of the battery device.

[0009] In some embodiments, the plurality of ribs includes a plurality of first ribs spaced apart along a first direction and a plurality of second ribs spaced apart along a second direction, wherein the plurality of first ribs and the plurality of second ribs are staggered, and the first direction is perpendicular to the second direction.

[0010] In the main body of this embodiment, the first and second ribs are arranged in an alternating grid-like support structure. The alternating and interconnected ribs can transfer the load to other ribs. When the housing assembly is subjected to local forces, the load can be quickly dispersed to the outer peripheral area and even the entire frame, thereby reducing the impact on the local area and reducing the displacement of the support assembly in the third direction. This provides stable support, improves the impact resistance of the housing assembly, and reduces the possibility of damage to individual battery cells under pressure. Moreover, the main body of this structure is easy to process.

[0011] In some embodiments, the first rib and the second rib are both long strips of plate-like structure, and the plate-like structure is set at an angle to the extension plane of the main body, with the angle ranging from 0° to 180°.

[0012] This embodiment arranges the ribs vertically to form a three-dimensional support structure. With a fixed rib thickness, this significantly improves the rigidity of the support assembly, better resisting forward and lateral impacts, reducing bending deformation and torsion, and effectively protecting the battery cells. Furthermore, this rib arrangement facilitates the formation of a three-dimensional ventilation channel, which is beneficial for heat dissipation from the battery cells and improves airflow efficiency.

[0013] In some embodiments, the support component further includes a mounting portion connected to at least one end of the main body portion along a first direction and connected to a structural beam.

[0014] This embodiment provides a mounting portion at at least one end of the main body along the first direction, which can conveniently fix the support component to the structural beam, making it easy to assemble and disassemble. For structural beams of different heights, the height of the mounting portion can be designed to match the structural beam.

[0015] In some embodiments, a plurality of structural beams are provided, and the plurality of structural beams are spaced apart in the receiving member along a first direction, and the support assembly is fixed to two structural beams at both ends along the first direction.

[0016] In this embodiment, the two ends of the support component are fixed to the two structural beams respectively, forming a stable installation form with support at both ends; in addition, the two ends of the support component along the first direction can also be designed with similar structures and fixed to the two structural beams, which can also increase the overall structural strength of the support component.

[0017] In some embodiments, the support component is integrally disposed on the cover.

[0018] This embodiment integrates the support component into the cover, essentially fixing the support component to the housing via the cover. The support component can cover the entire inner surface of the cover, or partially cover the inner surface of the cover depending on the actual impact conditions. This allows for localized thickening and reinforcement of high-impact areas within the cover. Alternatively, the support component can be partially removed to accommodate different battery device layouts, flexibly matching the load requirements and space constraints of various battery devices. This structure reduces the number of components in the battery device, simplifies assembly processes, and eliminates the mounting portion in the support component, allowing direct connection between the cover and the housing via flanges on the cover edge, thus improving structural integrity and rigidity.

[0019] In some embodiments, the main body has multiple hollow areas, the battery cell includes a housing, and the housing is provided with a pressure relief component. The pressure relief component is configured to open when the pressure inside the housing exceeds a preset pressure threshold or the temperature exceeds a preset temperature threshold. The pressure relief component is provided corresponding to the hollow areas.

[0020] This embodiment places the pressure relief component in the hollow area. When a battery cell experiences thermal runaway, the pressure relief component can be opened smoothly by deformation or detachment, so as not to be blocked by the ribs in the support assembly. This improves the reliability of the pressure relief component opening and ensures the reliability of the battery device operation.

[0021] In some embodiments, the battery device further includes a protective layer configured to protect the battery cells, the protective layer including at least one of a heat-insulating layer, a fire-resistant layer, a buffer layer, and an insulating layer.

[0022] If the protective layer in this embodiment is equipped with a heat insulation layer, it can reduce the transfer of heat from the outside of the battery device to the inside, preventing the battery cells from operating at high temperatures and ensuring the performance of the battery device. It can also reduce the direct transfer of heat from inside the battery device to the outside through the housing assembly, instead using a pre-designed heat dissipation device for heat conduction. If the protective layer is equipped with a fireproof layer, it can prevent the outward spread in the event of thermal runaway in the battery cells, reducing the risk of fire in the electrical equipment. If the protective layer is equipped with a buffer layer, it can absorb vibrations and impacts transmitted through the support assembly. If the protective layer is equipped with an insulation layer, it can achieve electrical isolation between the housing assembly and the battery cells, reducing the risk of short circuits or leakage. If multiple layer structures are used in combination, multiple protection functions can be achieved, thereby improving the reliability of the battery device.

[0023] In some embodiments, the main body has a receiving groove on the side facing or away from the battery cell, and a protective layer is disposed in the receiving groove.

[0024] This embodiment, by providing a receiving groove on the main body, allows the protective layer to be embedded inside the receiving groove, which is different from pasting or laying traditional foam. This facilitates the precise positioning and reliable fixation of the protective layer, eliminating the need for additional fixing. It simplifies the assembly process and prevents the protective layer from shifting under vibration conditions, thus protecting additional components fixed to the battery cell. Furthermore, the protective layer can further buffer impact forces on top of the supporting components, or provide other types of protection, improving the reliability and lifespan of the battery device.

[0025] In some embodiments, the main body portion is provided with at least one of a clearance groove and a limiting groove on the side facing the battery cell. The clearance groove is configured to clearance for additional components disposed on the battery cell, and the limiting groove is configured to limit the additional components.

[0026] This embodiment, by providing a clearance groove on the side of the main body facing the battery cell, can avoid additional components mounted on the battery cell, minimizing the size of the battery device along a third direction while withstanding impact forces through the support components. By providing a limiting groove on the side of the main body facing the battery cell, additional components mounted on the battery cell can be limited, preventing misalignment or movement of these components when the battery device operates under vibration. For example, the limiting groove can limit the busbar, preventing misalignment and indirect contact or detachment from the electrode terminals, improving the reliability of the electrical connection, and preventing additional forces from deforming the electrode terminals and affecting the performance of the battery cell.

[0027] In some embodiments, the battery device further includes a cover plate, which is disposed on the side of the main body facing the battery cell, and the cover plate is used to fix additional components disposed on the battery cell.

[0028] This embodiment, by providing a cover plate, can easily fix the additional components installed on the battery cell, so that the additional components can be reliably and firmly fixed, preventing shaking and misalignment, improving the stability of the overall structure, and thus improving the reliability of the battery device.

[0029] In some embodiments, the support components are made of fiberglass.

[0030] Fiberglass has the advantages of high strength, lightweight, aging resistance, corrosion resistance and flame retardancy. It can give the support components good rigidity, play a better impact resistance during long-term use, reduce the overall weight of the battery device and reduce the cost.

[0031] According to a second aspect of this application, an electrical device is provided, including the battery device of the above embodiment, the battery device being used to provide electrical energy to the electrical device.

[0032] In some embodiments, the electrical equipment includes a vehicle, the vehicle includes a vehicle floor, the vehicle floor has an installation opening; the housing assembly also includes a cover, the housing has an opening, the cover closes the opening and is connected to the housing, the cover is located within the installation opening and is part of the vehicle floor, and a main body is disposed between the cover and at least a portion of the battery cell in a third direction consistent with the height direction of the vehicle.

[0033] This embodiment places the cover of the battery device inside the mounting opening and as part of the vehicle floor, which can reduce the space occupied by the battery device in the vertical direction when it is installed in the vehicle. With a fixed installation height space, it is beneficial to improve the power of the battery device. With a fixed height dimension of the battery device, it can save installation space in the vehicle.

[0034] Since the cover is part of the vehicle floor and is subject to long-term trampling or severe impact, the battery device of this application has a support component between the cover and the battery cell, and the support component is fixed to the housing. This can better resist the trampling force, prevent the battery cell from being deformed by pressure or damaged in its internal structure, ensure the performance of the battery cell, and thus improve the working reliability of the battery device. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of some embodiments of the electrical equipment used in this application, which are vehicles.

[0037] Figure 2 This is a schematic diagram of the structure of some embodiments of the battery device of this application.

[0038] Figure 3 This is a structural schematic diagram of some embodiments of the battery device of this application, in which battery cells and support components are arranged inside the casing.

[0039] Figure 4 This is a schematic diagram of the structure of some embodiments of the support components in the battery device of this application.

[0040] Figure 5 for Figure 4 Top view.

[0041] Figure 6 This is a schematic diagram of the structure of some other embodiments of the support components in the battery device of this application.

[0042] Figure 7 Side view of some embodiments of the supporting component.

[0043] Figure 8 A schematic diagram of the structure for supporting the integration of the components and the cover.

[0044] Figure 9 for Figure 8 Side view.

[0045] Figure 10 A schematic diagram showing the positional relationship between the support components, the busbar, and the sampling components.

[0046] Figure 11 for Figure 10 Side view.

[0047] Figure 12 The diagram shows the structure of some other embodiments of the supporting components of this application.

[0048] The accompanying drawings are not drawn to scale.

[0049] Marker explanation: 100. Battery assembly; 10. Housing assembly; 1. Box body; 11. Retaining components; 12. Structural beams; 2. Cover; 3. Battery cell; 31. Casing; 311. Pressure relief component; 32. Electrode terminals; 4. Supporting components; 41. Main body; 411. First rib; 412. Second rib; 413. Hollowed-out area; 414. Receiving groove; 415. Clearance groove; 416. Limiting groove; 417. Third rib; 42. Mounting part; 5. Fasteners; 6. Protective layer; 61. Buffer layer; 62. Fireproof layer; 63. Heat insulation layer; 7. Sampling component; 8. Busbar; 200. Vehicle; 201. Cabin; 202. Vehicle floor; x, first direction; y, second direction; z, third direction. Detailed Implementation

[0050] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0051] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0052] This application uses terms such as "upper," "lower," "top," "bottom," "front," "back," "inner," and "outer" to indicate orientation or positional relationships. This is only for the convenience of describing this application and is not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this application.

[0053] Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" does not mean strictly vertical, but rather within the permissible range of error. "Parallel" does not mean strictly parallel, but rather within the permissible range of error. The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application.

[0054] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0055] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least some of the embodiments of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] Battery cells can include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and this application embodiment is not limited to these. Battery cells can be cylindrical, flat, cuboid, or other shapes, etc., and this application embodiment is not limited to these. Battery cells are generally divided into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to these. Current battery cells typically include a casing and electrode components housed within the casing, and the casing is filled with electrolyte.

[0057] Current battery cells typically consist of a casing and an electrode assembly housed within the casing, with an electrolyte filled inside. The electrode assembly is mainly formed by stacking or winding a first electrode and a second electrode with opposite polarities, and a separator is usually provided between the first and second electrodes. The portions of the first and second electrodes coated with active material constitute the main body of the electrode assembly, while the portions of the first and second electrodes not coated with active material constitute the first tab and the second tab, respectively. In lithium-ion batteries, the first electrode can be a positive electrode, including a positive current collector and a positive electrode coating layer disposed on both sides of the positive current collector. The material of the positive current collector can be, for example, aluminum, and the positive electrode coating can be, for example, lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The second electrode can be a negative electrode, including a negative current collector and a negative electrode coating layer disposed on both sides of the negative current collector. The material of the negative current collector can be, for example, copper, and the negative electrode coating layer can be, for example, graphite or silicon, etc. The first tab and the second tab can be located together at one end of the main body or at opposite ends of the main body. During the charging and discharging process of a single battery cell, the positive electrode coating and the negative electrode coating react with the electrolyte, and the tabs connect to the electrode leads to form a current loop.

[0058] Current battery devices suffer from low reliability, primarily due to the following reasons: In some battery devices, support strips are installed between the battery cells and the cover of the housing assembly to provide support. However, multiple separate support strips form a dispersed support and cannot form a continuous overall support surface. This has limited effect on improving the resistance to trampling. Moreover, when installing support strips, it is necessary to avoid key components such as pressure relief parts and electrode terminals of the battery cells. They can only press on the shoulders of the battery cells. When the cover is subjected to external impact, the load will still be transmitted to the battery cells through the support strips. Long-term use may cause deformation of the shoulders or end caps of the battery cells, damage to the internal structure, or even affect the electrochemical performance of the battery cells.

[0059] In current new energy vehicles, some models directly use the battery cover as the floor. The battery cover is typically made of thin steel plates. Therefore, in this usage scenario, the cover's resistance to trampling and denting is insufficient to meet requirements. If excessive force is applied to a localized area of ​​the cover and transmitted through the support bars to the battery cells, it can damage the individual cells. Increasing the structural strength of the cover by thickening the steel plate or adding reinforcing ribs would increase weight and hinder the overall vehicle lightweight design.

[0060] Therefore, the load on the battery device in the relevant technology is ultimately transmitted to the battery cell. After long-term use, it can still cause deformation of the battery cell, damage to its internal structure, or even affect the electrochemical performance of the battery cell.

[0061] Based on the aforementioned problems, this disclosure aims to change the force transmission path of the battery device, i.e., reduce the transmission of impact force to individual battery cells. Based on this idea, this application proposes an improved battery device to enhance its operational reliability. The battery device includes: a housing assembly, comprising a housing; multiple individual battery cells disposed within the housing; and a support assembly, fixed to the housing and including a main body. The main body is disposed between the wall of the housing assembly and at least some of the individual battery cells, and the main body includes multiple ribs interconnected to form a hollow structure.

[0062] When the housing assembly of this type of battery device is subjected to external impact, the force is directly transmitted to the housing through the support components, bypassing the individual battery cells. This optimizes the force transmission path, preventing deformation or internal structural damage to the battery cells and ensuring their performance is not affected, thereby improving the reliability of the battery device. Furthermore, localized impact forces on the housing assembly can be dispersed through multiple ribs, enhancing the impact resistance of the housing assembly. The hollowed-out main body reduces weight while minimizing impact and also facilitates heat dissipation from the battery cells.

[0063] The battery device described in this application is applicable to various electrical devices. These devices can be mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools, etc.

[0064] like Figure 1 As shown, the electrical equipment can be a vehicle 200, such as a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle; or the electrical equipment can be a drone or a ship. The vehicle 200 may include a cabin 201 and a vehicle floor 202, with the battery device 100 located between the cabin 201 and the vehicle floor 202. The battery device 100 can be located at the bottom, front, or rear of the vehicle 200, and is used to provide electrical power for the motor and other components in the vehicle.

[0065] like Figure 2 As shown, the battery device 100 includes a housing assembly 10 and individual battery cells 3. In the battery device 100, there can be one or more individual battery cells 3. If there are multiple individual battery cells 3, they can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple individual battery cells 3 can be connected in both series and parallel configurations. This can be achieved by first connecting multiple individual battery cells 3 in series, parallel, or in a mixed configuration to form a battery module, and then connecting multiple battery modules in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing assembly 10. Alternatively, all individual battery cells 3 can be directly connected in series, parallel, or in a mixed configuration, and then the whole formed by all individual battery cells 3 is housed within the housing assembly 10.

[0066] The housing assembly 10 can be part of the battery device 100, and the housing assembly 10 can be detachably installed on the electrical equipment for easy maintenance; or, the housing assembly 10 can be a space formed by a structural component in the electrical equipment to accommodate the battery cell 3. For example, when the battery cell 3 is used in the vehicle 200, the housing assembly 10 is a space formed by the vehicle frame to accommodate the battery cell 3.

[0067] The housing assembly 10 is hollow inside and is used to accommodate one or more battery cells 3. Depending on the shape, number, combination method and other requirements of the battery cells 3 it accommodates, the housing assembly 10 may also have different shapes and sizes.

[0068] The battery cell 3 can be a secondary battery. A secondary battery is a battery cell 3 that can be recharged to activate the active materials and continue to be used after it has been discharged.

[0069] The battery cell 3 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0070] As an example, the battery cell 3 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0071] This application provides a battery device 100, such as Figure 3 and Figure 4 As shown, the assembly includes: a housing assembly 10, multiple battery cells 3, and a support assembly 4. The housing assembly 10 includes a housing 1 and a cover 2. The housing 1 has an opening, and the cover 2 closes the opening and is connected to the housing 1. The housing 1 also includes a receiving member 11 and at least one structural beam 12 disposed within the receiving member 11. Multiple battery cells 3 are disposed within the housing assembly 10. The support assembly 4 is fixed to the housing 1 and at least one end of it is fixed to the structural beam 12 along a first direction x. The support assembly 4 includes a main body 41, which is disposed between the cover 2 and at least some of the battery cells 3 along a third direction z. The main body 41 includes multiple ribs, which are interconnected to form a hollow structure. The support assembly 4 and the battery cells 3 have a preset distance between them, and the first direction x and the third direction z intersect.

[0072] The cover 2 closes the opening and is detachably connected to the housing 1, for example, by means of fasteners. After multiple battery cells 3 are placed inside the housing 1, the cover 2 is fastened.

[0073] The support assembly 4 is detachably connected to the housing 1. Taking the application in vehicle 200 as an example, if the support assembly 4 is located between the cover 2 and the battery cell 3, the cover 2 of the battery device 100 can resist the force of being stepped on when it is part of the floor in the vehicle 200.

[0074] Preferably, there is a preset distance between the support component 4 and the battery cell 3, so that when the box assembly 10 is subjected to an impact force transmitted to the support component 4, even if the support component 4 undergoes a slight deformation, the impact force can be prevented from being transmitted to the battery cell 3.

[0075] The support assembly 4 can cover all battery cells 3, or cover a portion of the area where the battery cells 3 are located, depending on the actual impact on the battery device 100. For example, the main body 41 of the support assembly 4 is generally rectangular, but it can also be designed in other shapes. The main body 41 includes multiple ribs, which can be circular, elliptical, or polygonal such as triangles or rectangles in cross-sections perpendicular to their extension direction.

[0076] Multiple ribs are interconnected to form a hollow structure. The hollow area 413 can be circular, elliptical, or polygonal such as triangle or rectangle, and it runs through the thickness direction of the main body 41. The hollow area 413 allows for the avoidance of additional components mounted on the battery cell 3. The mesh parameters and shape can be precisely matched according to load distribution and lightweight objectives. The mesh shape can be adjusted through topology optimization to improve impact stiffness, balancing support strength and structural flexibility.

[0077] For example, support component 4 can be formed by machining or casting.

[0078] For example, such as Figure 3 , Figure 10 and Figure 11 The battery cell 3 includes a housing 31, and the housing 31 has an electrode terminal 32 on the side facing the cover 2. The electrode terminals 32 of adjacent battery cells 3 are electrically connected through a busbar 8. Since the cover 2 generally adopts a thin plate structure and has a large overall area, it is prone to inward deformation during use. Moreover, when applied to vehicles 200, some models directly use the cover 2 as the floor. In this scenario, the cover 2 is frequently stepped on, and its resistance to stepping and denting is difficult to meet the usage requirements. If a local area of ​​the cover 2 is subjected to large forces, it will be transmitted to the battery cell 3, causing the battery cell 3 to deform or be damaged.

[0079] This embodiment, by providing a support component 4 between the cover 2 and at least a portion of the battery cells 3, and fixing the support component 4 to the housing 1, allows the housing assembly 10 to reliably provide support when subjected to external impacts, such as being stepped on. This effectively prevents the cover 2 from undergoing significant inward deformation, and the force is directly transmitted to the housing 1 via the support component 4, bypassing the battery cells 3. This optimizes the force transmission path of the impact, preventing the battery cells 3 from being deformed under pressure or damaged internally, and avoiding any impact on the performance of the battery cells 3. This improves the operational reliability of the battery device 100. Furthermore, aligning the electrode terminals 32 and the busbar 8 of the battery cells 3 towards the cover 2 also reduces the likelihood of short circuits.

[0080] Furthermore, the localized impact force on the housing assembly 10 can be dispersed through multiple ribs, improving the impact resistance of the housing assembly 10. The hollow structure of the main body 41 can reduce weight as much as possible while minimizing impact, and is also conducive to heat dissipation of the battery cells 3. This layout can make full use of the gap space between the cover 2 and the battery cells 3, resulting in a compact structure, and the hollow structure of the main body 41 is conducive to heat dissipation of multiple battery cells 3.

[0081] Furthermore, fixing at least one end of the support component 4 along the first direction x to the structural beam 12 facilitates the placement of the support component 4 in localized areas based on the actual impact force distribution, or facilitates the placement of multiple independent support components 4. It also facilitates the installation and fixing of the support component 4 without requiring fixation to the side wall of the housing 1, allowing for flexible design of the coverage area of ​​the support component 4. Moreover, the impact force received by the housing component 10 can be transmitted to the structural beam 12 through the support component 4, preventing compression or damage to the battery cells 3 and improving the reliability of the battery device 100.

[0082] In some embodiments, such as Figure 4 and Figure 5As shown, the plurality of ribs includes: a plurality of first ribs 411 spaced apart along a first direction x and a plurality of second ribs 412 spaced apart along a second direction y. The plurality of first ribs 411 and the plurality of second ribs 412 are connected and staggered, and the first direction x and the second direction y intersect.

[0083] In this structure, multiple first ribs 411 and multiple second ribs 412 interweave to form a mesh-like perforated structure. Each first rib 411 can penetrate all of the second ribs 412, or each first rib 411 can only penetrate a portion of the second ribs 412. For example, the first ribs 411 extend along the second direction y, and the second ribs 412 extend along the first direction x. The first ribs 411 and the second ribs 412 interweave to form a grid-like perforated structure.

[0084] For example, if the first direction x is perpendicular to the second direction y, then multiple first ribs 411 and multiple second ribs 412 form a vertically intersecting grid-like hollow structure. Alternatively, if the first direction x intersects the second direction y to form an acute or obtuse angle, then multiple first ribs 411 and multiple second ribs 412 form a parallelogram-shaped hollow structure. For example, when the spacing between adjacent first ribs 411 and adjacent second ribs 412 is the same, a rhombus-shaped hollow structure is formed.

[0085] Optionally, such as Figure 12 As shown, the plurality of ribs includes: a plurality of first ribs 411 spaced apart along a first direction x, a plurality of second ribs 412 spaced apart along a second direction y, and a plurality of third ribs 417. The third ribs 417 can be connected to the first ribs 411 and the second ribs 412 to form the diagonal of the hollow area 413. For example, the third ribs 417 of the hollow areas 413 located at diagonal positions are collinear, and the third ribs 417 of adjacent hollow areas 413 serve as different diagonals to form a more stable support component 4.

[0086] Optionally, multiple ribs can be interconnected to form a honeycomb or other perforated structure, and the honeycomb grid can improve the uniformity of load-bearing capacity.

[0087] In the main body 41 of this embodiment, the first rib 411 and the second rib 412 are arranged in an alternating manner to form a grid-like support structure. The alternating and interconnected ribs can transfer the load to other ribs. When the housing assembly 10 is subjected to local forces, the load can be quickly dispersed to the outer peripheral area and even the entire frame, thereby reducing the impact force received locally and reducing the displacement of the support assembly 4 in the third direction z, providing stable support, improving the impact resistance of the housing assembly 10, and reducing the possibility of damage to the battery cell 3 under pressure. Moreover, the main body 41 with this structure is easy to process.

[0088] In some embodiments, the ribs are plate-shaped structures, and the plate-shaped structures are angled to the extension plane of the main body 41, with the angle ranging from 0° to 180°.

[0089] For example, such as Figure 4 As shown, the first rib 411 and the second rib 412 are arranged alternately, and all ribs are plate-like structures and are set at an angle of approximately 90 degrees to the extending plane of the main body 41, that is, the plate-like ribs are perpendicular to the extending plane of the main body 41. If the support assembly 4 is disposed between the cover 2 and the battery cell 3, the width direction of the ribs is consistent with the third direction z. Optionally, the plate-like ribs may also be inclined relative to the extending plane of the main body 41.

[0090] Optionally, the plate-like structure is aligned with the extension plane of the main body 41, so that the entire main body 41 forms a plate-like structure.

[0091] This embodiment arranges the ribs vertically to form a three-dimensional support structure. With a fixed rib thickness, this significantly improves the rigidity of the support component 4, enabling it to better resist forward and lateral impacts, reduce bending deformation and torsion of the support component 4, and effectively protect the battery cell 3. Furthermore, this rib arrangement facilitates the formation of a three-dimensional ventilation channel, which is beneficial for heat dissipation from the battery cell 3 and improves airflow efficiency.

[0092] In some embodiments, such as Figure 4 and Figure 7 As shown, the support component 4 also includes a mounting part 42, which is connected to at least one end of the main body 41 along the first direction x, and is connected to the structural beam 12.

[0093] The mounting portion 42 may extend continuously along the second direction y, or the mounting portion 42 may include a plurality of mounting structures spaced apart along the second direction y. By spaced apart the plurality of mounting structures, the weight of the support assembly 4 can be reduced, and some additional components on the top of the battery cell 3 can be avoided through the gaps between adjacent mounting structures.

[0094] For example, the mounting part 42 can be a plate-like structure that contacts the upper surface of the structural beam 12. The mounting part 42 is detachably connected to the structural beam 12. Optionally, the mounting part 42 can be rigidly fastened to the structural beam 12 by fasteners 5 such as bolts. Using fasteners 5 ensures connection reliability, prevents loosening under vibration conditions, and facilitates later maintenance and replacement of the support components 4 without damaging the structure of the housing 1. Furthermore, the rigid fastening can further enhance the stability of the force transmission path, ensure efficient load transfer to the housing 1, and improve impact resistance.

[0095] The mounting part 42 can extend outward toward the main body 41, that is, the mounting part 42 bends outward relative to the outermost rib. This structure can easily install and fix the mounting part 42 to the structural beam 12, which is convenient for operation and will not occupy the installation space of the battery cell 3.

[0096] This embodiment provides an installation part 42 at at least one end of the main body 41 along the first direction x, which can conveniently fix the support component 4 to the structural beam 12, making it easy to assemble and disassemble. For structural beams 12 of different heights, the height of the installation part 42 can be designed to match the structural beam 12.

[0097] In some embodiments, a plurality of structural beams 12 are provided, and the plurality of structural beams 12 are spaced apart in the receiving member 11 along the first direction x, and the support assembly 4 is fixed at both ends of two structural beams 12 along the first direction x respectively.

[0098] The adjacent structural beams 12 form a cavity to accommodate the battery cell 3, and the structural beams 12 can extend along the second direction y. For example, the support assembly 4 is fixed at both ends of two adjacent structural beams 12 along the first direction x.

[0099] like Figure 4 As shown, the main body 41 has mounting portions 42 at both ends along the first direction x, and the two mounting portions 42 are respectively fixed to two structural beams 12. For example, the two mounting portions 42 can be fixed to two adjacent structural beams 12 respectively, which can minimize the span of the support assembly 4 along the first direction x and increase the overall rigidity of the support assembly 4; or, if it is necessary to reduce the number of support assemblies 4, the two mounting portions 42 can be fixed to two non-adjacent structural beams 12 respectively.

[0100] In this embodiment, the two ends of the support component 4 are respectively fixed to two structural beams 12, forming a stable installation form with support at both ends; in addition, the two ends of the support component 4 along the first direction x can also be designed with similar structures and fixed to the two structural beams 12, which can also increase the overall structural strength of the support component 4. In some embodiments, such as Figure 8 As shown, the support component 4 is integrally set on the cover 2.

[0101] For example, the support component 4 and the cover 2 can be integrally formed, with the cover 2 abutting against the support component 4 and closing the side of the support component 4 away from the battery cell 3.

[0102] For example, the support component 4 and the cover 2 can be integrally formed by lay-up injection molding, compression molding or co-extrusion processes.

[0103] In this embodiment, the support component 4 is integrated into the cover 2, which means that the support component 4 is fixed to the housing 1 through the cover 2. The support component 4 can cover the entire inner surface of the cover 2, or partially cover the inner surface of the cover 2 according to the actual impact conditions, so as to locally thicken and reinforce the areas of high impact by the support component 4. Alternatively, the support component 4 can be partially removed to avoid the layout within the battery device 100, so as to flexibly match the load requirements and space constraints of different battery devices 100. This structure can reduce the number of parts in the battery device 100, simplify the assembly process, and eliminate the mounting part 42 in the support component 4, directly connecting the cover 2 to the housing 1 using the flange on the edge, thereby improving the overall structural integrity and rigidity.

[0104] In some embodiments, such as Figure 3 As shown, the main body 41 has multiple hollow areas 413. The battery cell 3 includes a housing 31. The housing 31 is provided with a pressure relief component 311. The pressure relief component 311 is configured to open when the pressure inside the housing 31 exceeds a preset pressure threshold or the temperature exceeds a preset temperature threshold. The pressure relief component 311 is correspondingly arranged with the hollow areas 413.

[0105] In this embodiment, the pressure relief component 311 is located in the hollow area 413. When the battery cell 3 experiences thermal runaway, the pressure relief component 311 can be opened smoothly by deformation or detachment, so as not to be blocked by the ribs in the support component 4, thereby improving the reliability of the opening of the pressure relief component 311 and ensuring the reliability of the operation of the battery device 100.

[0106] In some embodiments, such as Figure 4 As shown, the battery device also includes a protective layer 6 configured to protect the battery cell 3. The protective layer 6 includes at least one of a heat insulation layer 63, a fireproof layer 62, a buffer layer 61, and an insulating layer.

[0107] For example, such as Figure 6 As shown, the protective layer 6 includes a heat insulation layer 63, a fireproof layer 62, and a buffer layer 61 stacked along the third direction z. The stacking order of each functional layer can be set according to actual needs.

[0108] For example, the buffer layer 61 can be made of foam, PU (polyurethane) foam, silicone or elastic filler, etc., which can be flexibly selected according to needs to achieve buffering and vibration absorption; the fireproof layer 62 can be made of aerogel, etc.; and the heat insulation layer 63 can be made of mica paper, mica board, TC (thermal ceramic fiber) tape, etc.

[0109] For example, a buffer layer 61 is located in the middle, and a fireproof layer 62 and a heat insulation layer 63 are respectively laminated on the upper and lower surfaces. Glass fiber and ceramic fiber layers can be added between adjacent layers to achieve multiple functions such as support, buffer, heat insulation, insulation and fireproofing.

[0110] If the protective layer 6 in this embodiment is provided with a heat insulation layer, it can reduce the transfer of heat from the outside of the battery device 100 to the inside, preventing the battery cells 3 from operating at high temperatures and ensuring the working performance of the battery device 100. It can also reduce the direct transfer of heat from the inside of the battery device 100 to the outside through the housing assembly 10, instead allowing heat to be conducted through a pre-set heat dissipation device. If the protective layer 6 is provided with a fireproof layer, it can prevent the outward spread in the event of thermal runaway of the battery cells 3, reducing the risk of fire in the electrical equipment. If the protective layer 6 is provided with a buffer layer, it can absorb the vibration and impact transmitted through the support assembly 4. If the protective layer 6 is provided with an insulation layer, it can achieve electrical isolation between the housing assembly 10 and the battery cells 3, reducing the risk of short circuits or leakage. If multiple layer structures are used in combination, multiple protection functions can be achieved, thereby improving the reliability of the battery device 100.

[0111] In some embodiments, the main body 41 is provided with a receiving groove 414 on the side facing or away from the battery cell 3, and the protective layer 6 is disposed in the receiving groove 414.

[0112] Among them, the two outermost first ribs 411 in the first direction x extend toward the battery cell 3 at a greater height than the other first ribs 411, so as to form a receiving groove 414.

[0113] This embodiment, by providing a receiving groove 414 on the main body 41, allows the protective layer 6 to be embedded inside the receiving groove 414, which is different from pasting or laying traditional foam. This facilitates the positioning and fixation of the protective layer 6, achieving precise positioning and reliable fixation without the need for additional fixation. This simplifies the assembly process and prevents the protective layer 6 from shifting under vibration conditions, thus avoiding impact on additional components fixed to the battery cell 3. Furthermore, the protective layer 6 can further buffer impact forces on top of the support assembly 4, or provide other types of protection, improving the operational reliability and service life of the battery device 100.

[0114] In some embodiments, the main body 41 is provided with at least one of a clearance groove 415 and a limiting groove 416 on the side facing the battery cell 3. The clearance groove 415 is configured to clearance the additional component disposed on the battery cell 3, and the limiting groove 416 is configured to limit the additional component.

[0115] Among them, such as Figure 4 , Figure 6 and Figure 9As shown, the cross-section of the clearance groove 415 is arc-shaped, such as a circular arc, or it can also be set to a rectangle or other shapes. The limiting groove 416 can be rectangular or other shapes. Both the clearance groove 415 and the limiting groove 416 can extend along the first direction x, which is the direction in which multiple battery cells 3 are arranged side by side.

[0116] like Figure 10 As shown, a sampling component 7 is disposed above the battery cell 3. The sampling component 7 is configured to collect electrical signals and / or temperature signals of the battery cell 3 during operation. The electrical signals include at least one of voltage signals and current signals. The sampling component 7 has a rectangular strip structure and extends along a first direction x. For example, a limiting groove 416 can limit the displacement of the sampling component 7 along a second direction y. The limiting groove 416 extends through the first direction x.

[0117] Each battery cell 3 includes a housing 31. Electrode terminals 32 are provided on the side of the housing 31 facing the cover 2. The electrode terminals 32 of adjacent battery cells 3 are electrically connected via busbars 8. Multiple busbars 8 are spaced apart along a first direction x. By providing a clearance groove 415 extending along the first direction x on the side of the main body 41 facing the battery cell 3, a row of busbars 8 located at the same position along a second direction y can be cleared.

[0118] Optionally, depending on actual needs, the clearance groove 415 and the limiting groove 416 can also be used to clear or limit other additional components on the battery cell 3.

[0119] This embodiment provides a clearance groove 415 on the side of the main body 41 facing the battery cell 3, which allows for clearance of additional components mounted on the battery cell 3. This minimizes the size of the battery device 100 along the third direction z while allowing it to withstand impact forces through the support assembly 4. A limiting groove 416 on the side of the main body 41 facing the battery cell 3 limits the movement of additional components mounted on the battery cell 3, preventing misalignment or movement of these components when the battery device 100 operates under vibration conditions. For example, the limiting groove 416 limits the busbar 8, preventing misalignment and potential contact or detachment from the electrode terminal 32, improving the reliability of the electrical connection, and preventing additional forces from deforming the electrode terminal 32 and affecting the performance of the battery cell 3.

[0120] In some embodiments, the battery device 100 further includes a cover plate, which is disposed on the side of the main body 41 facing the battery cell 3. The cover plate is used to fix additional components disposed on the battery cell 3.

[0121] For example, the cover plate can be fixed by adhesive or by fasteners to the main body 41. Additional components include at least one of the following: sampling component 7, busbar 8, wiring harness, and temperature sensor. To reduce weight, the cover plate can be made of a skin. Providing cover plates on both sides of the main body 41 along the third direction z can form a fully enclosed protective structure, blocking heat transfer during thermal runaway of the battery cell 3, or providing insulation protection.

[0122] This embodiment, by providing a cover plate, can conveniently fix the additional components installed on the battery cell 3, so that the additional components can be reliably and firmly fixed, preventing shaking and misalignment, improving the stability of the overall structure, and thus improving the reliability of the battery device 100.

[0123] In some embodiments, the support component 4 is made of fiberglass.

[0124] Alternatively, depending on actual needs, the support component 4 can also be formed by splicing together high-strength materials such as high-strength steel wire, cold-drawn steel bars, stamped steel strips, glass fiber reinforcement, and carbon fiber.

[0125] Fiberglass material has the advantages of high strength, lightweight, aging resistance, corrosion resistance and flame retardancy. It can give the support component 4 good rigidity, play a better impact resistance during long-term use, reduce the overall weight of the battery device 100 and reduce the cost.

[0126] In some specific embodiments, such as Figure 2 and Figure 3 As shown, the battery device 100 includes a housing assembly 10 and battery cells 3. The housing assembly 10 includes a housing 1 and a cover 2. The housing 1 has an opening, and the cover 2 closes the opening and is connected to the housing 1. The main body 41 of the support assembly 4 is disposed between the cover 2 and at least a portion of the battery cells 3 along a third direction z of the battery device 100. The housing 1 includes a receiving member 11 and a plurality of structural beams 12. The plurality of structural beams 12 are disposed within the receiving member 11 and spaced apart along a first direction x. A plurality of groups of battery cells 3 are disposed between adjacent structural beams 12 along a second direction y. The plurality of battery cells 3 in each group of battery cells 3 are arranged side by side along the first direction x. One or more support assemblies 4 may be provided, and the two ends of the support assembly 4 along the first direction x are detachably connected to adjacent structural beams 12.

[0127] like Figures 4 to 6As shown, the support component 4 has multiple ribs including multiple first ribs 411 spaced apart along the first direction x and multiple second ribs 412 spaced apart along the second direction y. The first ribs 411 extend along the second direction y, and the second ribs 412 extend along the first direction x. The multiple first ribs 411 and multiple second ribs 412 are staggered. The first ribs 411 and the second ribs 412 have a plate-like structure, and their width direction is consistent with the third direction z. Thus, the main body 41 forms a rectangular grid structure.

[0128] In the first direction x, the two outermost first ribs 411 extend toward the battery cell 3 at a greater height than the other first ribs 411 to form a receiving groove 414, into which the protective layer 6 is embedded for positioning and fixation. For example, the protective layer 6 includes at least one of a heat insulation layer 63, a fireproof layer 62, a buffer layer 61, and an insulating layer.

[0129] In some embodiments, the electrical equipment includes a vehicle 200, which includes a vehicle floor with an installation opening; the housing assembly 10 also includes a cover 2, the housing 1 having an opening, the cover 2 closing the opening and being connected to the housing 1, the cover 2 being located within the installation opening and serving as part of the vehicle floor, and a main body 41 being disposed between the cover 2 and at least a portion of the battery cell 3 along a third direction z consistent with the height direction of the vehicle 200.

[0130] The vehicle floor serves as the main bottom support structure for the passenger and driver's cabin. Mounting openings matching the shape and size of the cover 2 can be provided on the vehicle floor. For example, the mounting openings are rectangular, and the cover 2 is embedded in the mounting openings. The cover 2 is flush with the top of the rest of the vehicle floor, thus the cover 2 and the rest of the vehicle floor together form the vehicle floor.

[0131] In this embodiment, the cover 2 of the battery device 100 is placed inside the mounting opening and serves as part of the vehicle floor. This reduces the space occupied by the battery device 100 in the vertical direction when it is installed in the vehicle 200. Given a fixed installation height, this helps to increase the power of the battery device 100. Given a fixed height of the battery device 100, this saves installation space in the vehicle 200.

[0132] Since the cover 2 is part of the vehicle floor and will be subjected to trampling or severe impact for a long time, the battery device 100 of this application provides a support component 4 between the cover 2 and the battery cell 3. The support component 4 is fixed to the housing 1, which can better resist the trampling force, prevent the battery cell 3 from being deformed by pressure or damaged in its internal structure, ensure the performance of the battery cell 3, and thus improve the working reliability of the battery device 100.

[0133] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The box assembly (10) includes a box (1) and a cover (2), the box (1) having an opening, the cover (2) closing the opening and being connected to the box (1), the box (1) including a receiving member (11) and at least one structural beam (12) disposed within the receiving member (11). Multiple battery cells (3) are disposed within the housing assembly (10); and A support component (4) is fixed to the housing (1) and at least one end of it is fixed to the structural beam (12) along the first direction (x). The support component (4) includes a main body (41), which is disposed between the cover (2) and at least a portion of the battery cell (3) along a third direction (z). The main body (41) includes multiple ribs, which are connected to each other to form a hollow structure. The support component (4) and the battery cell (3) have a preset distance between them. The first direction (x) and the third direction (z) intersect each other.

2. The battery device according to claim 1, characterized in that, The plurality of said ribs include: a plurality of first ribs (411) spaced apart along the first direction (x) and a plurality of second ribs (412) spaced apart along the second direction (y), the plurality of first ribs (411) and the plurality of second ribs (412) being connected and interleaved, the first direction (x) and the second direction (y) being intersected.

3. The battery device according to claim 1, characterized in that, The ribs are plate-shaped, and the plate-shaped structure is set at an angle to the extension plane of the main body (41), with the angle value ranging from 0° to 180°.

4. The battery device according to claim 1, characterized in that, The support component (4) further includes a mounting part (42) connected to at least one end of the main body (41) along the first direction (x) and connected to the structural beam (12).

5. The battery device according to claim 1, characterized in that, The structural beams (12) are configured as a plurality of such beams, which are spaced apart in the receiving member (11) along the first direction (x). The support assembly (4) is fixed at both ends of two of the structural beams (12) along the first direction (x).

6. The battery device according to claim 1, characterized in that, The support component (4) is integrally disposed on the cover (2).

7. The battery device according to claim 1, characterized in that, The main body (41) has multiple hollow areas (413). The battery cell (3) includes a housing (31). The housing (31) is provided with a pressure relief component (311). The pressure relief component (311) is configured to open when the pressure inside the housing (31) exceeds a preset pressure threshold or the temperature exceeds a preset temperature threshold. The pressure relief component (311) is provided corresponding to the hollow areas (413).

8. The battery device according to any one of claims 1 to 7, characterized in that, The battery device further includes a protective layer (6) configured to protect the battery cell (3), the protective layer (6) including at least one of a heat insulation layer (63), a fireproof layer (62), a buffer layer (61) and an insulating layer.

9. The battery device according to claim 8, characterized in that, The main body (41) has a receiving groove (414) on the side facing or away from the battery cell (3), and the protective layer (6) is disposed in the receiving groove (414).

10. The battery device according to any one of claims 1 to 7, characterized in that, The main body (41) is provided with at least one of a clearance groove (415) and a limiting groove (416) on the side facing the battery cell (3). The clearance groove (415) is configured to clearance the additional component disposed on the battery cell (3), and the limiting groove (416) is configured to limit the additional component disposed on the battery cell (3).

11. The battery device according to any one of claims 1 to 7, characterized in that, It also includes a cover plate, which is provided on the side of the main body (41) facing the battery cell (3), and the cover plate is used to fix additional components provided on the battery cell (3).

12. The battery device according to any one of claims 1 to 7, characterized in that, The support component (4) is made of fiberglass.

13. An electrical appliance, characterized in that, Includes the battery device (100) according to any one of claims 1 to 12, the battery device (100) being used to provide electrical energy to the electrical equipment.

14. The electrical equipment according to claim 13, characterized in that, The electrical equipment includes a vehicle (200), the vehicle (200) includes a body floor, and the body floor is provided with an installation port; The housing assembly (10) further includes a cover (2), the housing (1) having an opening, the cover (2) closing the opening and being connected to the housing (1), the cover (2) being located within the mounting opening and serving as part of the vehicle floor, the main body (41) being disposed between the cover (2) and at least a portion of the battery cell (3) along a third direction (z) consistent with the height direction of the vehicle (200).

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