Battery device, electric device, energy storage device

Abstract

The application provides a battery device, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery device comprises a plurality of battery monomers, at least part of the battery monomers are arranged along a first direction, and the battery monomers comprise two first walls oppositely arranged along the first direction; the battery device further comprises a cooling member and a box body, the cooling member is clamped between two first walls adjacent to two adjacent battery monomers; the box body comprises a bearing plate for bearing the battery monomers and two side walls connected with the bearing plate, the bearing plate is oppositely arranged with the battery monomers along a second direction perpendicular to the first direction, the bearing plate comprises a bearing plate body and a plurality of reinforcing ribs located on at least one side of the bearing plate body along the second direction, the two side walls are oppositely and spaced apart along a third direction, the third direction is perpendicular to both the first direction and the second direction, and both ends of at least one reinforcing rib are fixedly connected with the two side walls, respectively. The application can balance the light weight and the anti-side column collision capacity of the battery.

Description

Technical Field

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

[0002] Batteries are being used more and more widely in daily life and production. For example, new energy vehicles equipped with batteries are already widely used, and batteries can provide all or part of the power for these vehicles. In addition, batteries are increasingly being used in energy storage and other fields.

[0003] Traditional battery casings, as a key structure of batteries, occupy a significant proportion of the battery's weight and volume, and perform crucial functions. To meet strength and functional requirements, battery casings are typically made of steel and aluminum alloys, resulting in generally bulky casings that severely limit the weight distribution and capacity increase of individual battery cells, thus affecting the battery's energy density. Therefore, how to reduce battery weight and increase its energy density while ensuring that the battery meets mechanical performance requirements has become an urgent problem to be solved in the current battery technology field. Utility Model Content

[0004] This application aims to at least solve one of the technical problems existing in the background art. To this end, one object of this application is to provide a battery device, an electrical device, and an energy storage device, so as to achieve battery weight reduction and increase its energy density while meeting the battery mechanical performance requirements.

[0005] An embodiment of the first aspect of this application provides a battery device including a plurality of battery cells, at least some of which are arranged along a first direction. Each battery cell includes two first walls disposed opposite to each other along the first direction. The battery device also includes a cooling element and a housing. The cooling element is sandwiched between two adjacent first walls of two adjacent battery cells. The housing includes a support plate for supporting the battery cells and two side walls connected to the support plate. The support plate and the battery cells are disposed opposite to each other along a second direction perpendicular to the first direction. The two side walls are spaced apart along a third direction, which is perpendicular to both the first and second directions. The support plate includes a support plate body and a plurality of reinforcing ribs located on at least one side of the support plate body along the second direction. At least one reinforcing rib has two ends fixedly connected to the two side walls respectively.

[0006] In the technical solution of this application embodiment, the cooling component is sandwiched between the first walls of two adjacent battery cells, i.e., a side cooling scheme is adopted. This reduces the load-bearing requirements of the support plate in the second direction, allowing the support plate body to be simplified into a single-layer plate structure while meeting the support requirements, which is beneficial for the lightweighting of the battery device. By providing reinforcing ribs on at least one side of the support plate body along the second direction, and fixing both ends of at least one reinforcing rib to the two side walls respectively, a force-bearing frame connecting the lateral and transverse structures can be formed. This not only improves the structural stiffness, deformation resistance, and load-bearing capacity of the support plate, but also transmits the lateral impact force through the side walls to the reinforcing ribs and support plate connected to them. The entire housing frame participates in absorbing and dispersing impact energy, improving the battery's resistance to side impacts.

[0007] In some embodiments, the reinforcing rib includes a first reinforcing rib disposed on the side of the support plate body facing the battery cell, and the orthographic projection of the battery cell on a plane perpendicular to the second direction is completely offset from the location of the first reinforcing rib. Thus, the combination of the first reinforcing rib and the support plate body forms a natural venting channel. When the corresponding battery cell experiences thermal runaway, the ejected material can smoothly and quickly be discharged to a designated location along this venting channel, greatly reducing the risk of heat spread. Furthermore, when the battery device is subjected to severe conditions such as bottom ball impact or bottom scraping, it can prevent concentrated loads from acting directly on the bottom of the battery cell, thus protecting the battery cell.

[0008] In some embodiments, the first reinforcing rib extends along a third direction that is simultaneously perpendicular to the first and second directions, and multiple first reinforcing ribs are spaced apart along the first direction. This greatly improves the impact, bending, and torsional resistance of the support plate in the third direction, enabling the battery device to achieve better side-impact protection.

[0009] In some embodiments, the first reinforcing rib and the cooling element are arranged facing each other along the second direction. This allows both the first reinforcing rib and the cooling element to be positioned between two adjacent battery cells, achieving a reasonable layout, improving the space utilization rate inside the battery device, and contributing to the improvement of the energy density of the battery device.

[0010] In some embodiments, the orthographic projection of the cooling element onto the support plate at least partially coincides with the location of the corresponding first reinforcing rib. This allows the first reinforcing rib and the cooling element to share space, improving the internal space utilization of the battery device and contributing to increased energy density.

[0011] In some embodiments, the dimension of the cooling element along the first direction is greater than or equal to the dimension of the corresponding first reinforcing rib along the first direction. This does not increase the spacing between adjacent battery cells, which helps improve the internal space utilization of the battery device, thereby increasing the energy density of the battery device.

[0012] In some embodiments, the cooling element has a groove on the side facing the first reinforcing rib, the groove being used to accommodate the first reinforcing rib. This effectively limits the movement of the cooling element and the battery cells, directly restricting the lateral expansion and displacement of adjacent battery cells and improving the stability of the battery device structure.

[0013] In some embodiments, the reinforcing ribs include a plurality of second reinforcing ribs disposed on the side of the support plate body opposite to the battery cell, the second reinforcing ribs extending along a third direction, and the plurality of second reinforcing ribs being spaced apart along a first direction. This significantly improves the rigidity of the support plate and greatly enhances its resistance to impact, bending, and torsion in the third direction, enabling the battery device to achieve better side-impact protection.

[0014] In some embodiments, the reinforcing ribs include a plurality of second reinforcing ribs disposed on the side of the support plate body facing away from the battery cell, and at least two of the plurality of second reinforcing ribs are arranged intersectingly. In this way, the deformation in multiple directions within the plane of the support plate body can be more effectively restrained, and the intersecting second reinforcing ribs can distribute the load in all directions, reducing local stress concentration.

[0015] In some embodiments, the reinforcing ribs include a second reinforcing rib disposed on the side of the support plate body facing away from the battery cell, wherein the orthographic projection of any second reinforcing rib at least partially coincides with the orthographic projection of a first reinforcing rib in a plane perpendicular to the second direction. This allows the support plate to form a three-dimensional, two-way support frame, significantly improving the overall rigidity and deformation resistance of the support plate.

[0016] In some embodiments, the reinforcing rib includes a second reinforcing rib disposed on the side of the support plate body opposite to the battery cell. In a plane perpendicular to the second direction, the orthographic projection of any second reinforcing rib is completely offset from the orthographic projection of the first reinforcing rib. In this way, the first and second reinforcing ribs with offset projections can form mechanical complementarity and misalignment reinforcement, thereby resisting complete deformation of the support plate in both vertical and horizontal directions with the least amount of material used, significantly improving the bidirectional bending resistance efficiency of the support plate.

[0017] In some embodiments, the stiffener includes a stiffener body and a partition. The stiffener body has a cavity, and the partition is disposed within the cavity and serves to divide the cavity into multiple independent sub-cavities. In this way, without significantly increasing the mass, the stiffener's own resistance to bending, torsion, and local buckling is significantly improved by optimizing the internal support structure, thereby improving the resistance to bending, torsion, and local buckling of the load-bearing plate.

[0018] In some embodiments, the stiffeners are integrally formed with the load-bearing plate body. This improves the integrity and reliability of the structure, thereby enhancing the overall stiffness and structural strength of the load-bearing plate.

[0019] In some embodiments, a pressure relief structure is provided on the side of the battery cell facing the support plate, and the orthographic projection of the pressure relief structure on the support plate is offset from the orthographic projection of the reinforcing rib on the support plate. In this way, when the corresponding battery cell experiences thermal runaway, the reinforcing rib will not obstruct pressure relief and directional discharge, greatly reducing the risk of thermal propagation.

[0020] In some embodiments, the battery device further includes a protective element located on the side of the support plate body facing away from the battery cells, with its outer periphery fixedly connected to the housing. The protective element provides excellent protection for the bottom of the battery device, enhancing the safety performance of the electrical appliance.

[0021] In some embodiments, a smoke exhaust channel is formed between the support plate body and the protective component. The battery cell has a pressure relief structure on the side facing the support plate body, and the support plate has an exhaust hole that communicates with the smoke exhaust channel. This allows high-temperature smoke generated by any battery cell after thermal runaway to flow unimpeded into the smoke exhaust channel through the exhaust hole, preventing the accumulation of high-temperature smoke in a localized area and thus avoiding thermal runaway of other battery cells.

[0022] An embodiment of the second aspect of this application provides an electrical device, which includes the aforementioned battery device for providing electrical energy.

[0023] An embodiment of the third aspect of this application provides an energy storage device, which includes a plurality of the above-described battery devices for storing electrical energy.

[0024] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0025] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0026] Figure 1 This is an exploded view of the battery device according to some embodiments of this application;

[0027] Figure 2 Here are exploded views of individual battery cells from some embodiments of this application;

[0028] Figure 3 This is a schematic diagram of the structure of a battery cell according to some embodiments of this application;

[0029] Figure 4 This is a partial exploded view of a battery device according to some embodiments of this application;

[0030] Figure 5 for Figure 4 Enlarged view of region A in the middle;

[0031] Figure 6 This is a schematic diagram of the structure of the support plate and the battery cell in some embodiments of this application;

[0032] Figure 7 for Figure 6 Enlarged view of region B in the middle;

[0033] Figure 8 This is a schematic diagram of the support plate and battery cell in some other embodiments of this application;

[0034] Figure 9 This is a plan view of the support plate in some embodiments of this application;

[0035] Figure 10 This is one of the cross-sectional schematic diagrams of the support plate in a first direction according to some embodiments of this application;

[0036] Figure 11 This is a second schematic cross-sectional view of the support plate in a first direction according to some embodiments of this application;

[0037] Figure 12 This is a schematic cross-sectional view of the reinforcing ribs in a first direction according to some embodiments of this application;

[0038] Figure 13 This is a schematic diagram of the structure of an electrical device according to some embodiments of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 10. Housing; 100. Battery assembly; 101. Battery cell; 1011. End cap; 1012. Electrode terminal; 1013. Pressure relief structure; 1014. Housing; 1015. Electrode assembly; 1016. Tab; 101a. First wall; 101b. Second wall; 11. First part; 12. Second part; 121. Support plate; 1211. Support plate body; 1212. Reinforcing rib; 1213. Vent hole; 122. Frame; 122a. Side wall; 12121. First reinforcing rib; 12122. Second reinforcing rib; 1212a. Reinforcing rib body; 1212b. Separator; 1212c. Sub-cavity; 20. Cooling component; 201. Groove; 30. Protective component. Detailed Implementation

[0041] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0043] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0044] 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 one embodiment 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.

[0045] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0046] 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).

[0047] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0048] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0049] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0050] Among the many characteristics of rechargeable batteries, the capacity and weight of a single battery cell are closely related. Increased weight of a single cell means a corresponding increase in capacity, thus improving the amount of electricity delivered by the rechargeable battery. The casing, as a key structure of the rechargeable battery, occupies a significant proportion of the battery's weight and volume, and performs crucial functions. It must not only provide reliable mechanical support to ensure the battery's structural stability under various operating conditions, but also possess protective functions and the ability to withstand external impacts and vibrations.

[0051] To meet the aforementioned strength and functional requirements, battery casings are typically made of metal to provide good support and protection. The base plate, as the main structure supporting the individual battery cells, usually employs a double-layer profile structure to enhance its load-bearing capacity. However, this structure not only results in greater thickness but also increases the weight of the casing, which undoubtedly increases the overall weight of the battery and is detrimental to improving its energy density.

[0052] Furthermore, in traditional bottom-cooling solutions, cooling structures such as water-cooled plates are integrated or placed on the bottom plate. This results in high demands on the structural form and mechanical properties of the bottom plate, typically using thick metal profiles to resist deformation, and the thickness is also increased to meet the requirements of the flow channel arrangement. However, this significantly increases the overall weight of the battery, which is detrimental to improving the battery's energy density.

[0053] Based on the above considerations, this application designs a battery device, including multiple battery cells, at least some of which are arranged along a first direction. Each battery cell includes two first walls that are arranged opposite each other along the first direction. The battery device also includes a cooling element and a housing. The cooling element is sandwiched between two adjacent first walls of two adjacent battery cells. The housing includes a support plate for supporting the battery cells and two side walls connected to the support plate. The support plate and the battery cells are arranged opposite each other along a second direction perpendicular to the first direction. The two side walls are arranged at intervals along a third direction, which is perpendicular to both the first and second directions. The support plate includes a support plate body and multiple reinforcing ribs located on at least one side of the support plate body along the second direction. At least one reinforcing rib has its two ends fixedly connected to the two side walls respectively.

[0054] In the technical solution of this application embodiment, the cooling component is sandwiched between the first walls of two adjacent battery cells, i.e., a side cooling scheme is adopted. This reduces the load-bearing requirements of the support plate in the second direction, allowing the support plate body to be simplified into a single-layer plate structure while meeting the support requirements, which is beneficial for the lightweighting of the battery device. By providing reinforcing ribs on at least one side of the support plate body along the second direction, and fixing both ends of at least one reinforcing rib to the two side walls respectively, a force-bearing frame connecting the lateral and transverse structures can be formed. This not only improves the structural stiffness, deformation resistance, and load-bearing capacity of the support plate, but also transmits the lateral impact force through the side walls to the reinforcing ribs and support plate connected to them. The entire housing frame participates in absorbing and dispersing impact energy, improving the battery's resistance to side impacts.

[0055] The battery device disclosed in this application can be used, but is not limited to, in electrical devices or energy storage devices such as vehicles, ships, or aircraft. A power system incorporating the battery device disclosed in this application can be used to form such an electrical device or energy storage device.

[0056] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0057] This application also provides an energy storage device that uses a battery as a power source. The energy storage device can be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0058] Please refer to Figure 1 , Figure 1 This is an exploded structural diagram of a battery device according to some embodiments of this application. The battery device 100 includes a housing 10 and a battery cell 101, with the battery cell 101 housed within the housing 10. The housing 10 provides a accommodating space for the battery cell 101, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining a accommodating space for accommodating the battery cell 101. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the accommodating space; alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0059] In the battery device 100, there can be multiple battery cells 101, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 101 are connected in both series and parallel configurations. Multiple battery cells 101 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 101 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 101 first connected in series, parallel, or in a mixed manner to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed manner to form a whole, which is also housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar for electrical connection between the multiple battery cells 101.

[0060] Each battery cell 101 can be a rechargeable battery, such as a lithium-ion battery, lithium-sulfur battery, sodium-ion battery, or magnesium-ion battery, etc. The battery cell 101 can be cylindrical, flat, cuboid, or other shapes.

[0061] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery cell according to some embodiments of this application. Battery cell 101 refers to the smallest unit that makes up a battery. Figure 2The battery cell 101 includes an end cap 1011, a housing 1014, an electrode assembly 1015, and other functional components.

[0062] End cap 1011 refers to a component that covers the opening of housing 1014 to isolate the internal environment of battery cell 101 from the external environment. Not limited to this, the shape of end cap 1011 can be adapted to the shape of housing 1014 to fit the housing 1014. In some embodiments, end cap 1011 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 1011 is not easily deformed under pressure and impact, enabling battery cell 101 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 1012 can be provided on end cap 1011. Electrode terminals 1012 can be used for electrical connection with electrode assembly 1015 for outputting or inputting electrical energy from battery cell 101. In some embodiments, end cap 1011 can also be provided with a pressure relief structure 1013 for releasing internal pressure when the internal pressure or temperature of battery cell 101 reaches a threshold. The end cap 1011 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element can be provided on the inner side of the end cap 1011. The insulating element can be used to isolate the electrical connection components inside the housing 1014 from the end cap 1011 to reduce the risk of short circuit. For example, the insulating element can be plastic, rubber, etc.

[0063] The housing 1014 is a component used to cooperate with the end cap 1011 to form the internal environment of the battery cell 101, wherein the formed internal environment can accommodate the electrode assembly 1015, electrolyte, and other components. The housing 1014 and the end cap 1011 can be independent components. An opening can be provided on the housing 1014, and the end cap 1011 closes the opening to form the internal environment of the battery cell 101. Alternatively, the end cap 1011 and the housing 1014 can be integrated. Specifically, the end cap 1011 and the housing 1014 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 1014, the end cap 1011 closes the housing 1014. The housing 1014 can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 1014 can be determined according to the specific shape and size of the electrode assembly 1015. The casing 1014 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0064] Electrode assembly 1015 is the component in the battery cell 101 where electrochemical reactions occur. The housing 1014 may contain one or more electrode assemblies 1015. Electrode assembly 1015 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrode sheets without active material each constitute a tab 1016. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 1016 connect to the electrode terminals to form a current loop.

[0065] Please refer to Figures 3-6 An embodiment of the first aspect of this application provides a battery device including a plurality of battery cells 101, at least some of which are arranged along a first direction X. Each battery cell 101 includes two first walls 101a disposed opposite to each other along the first direction X. The battery device also includes a cooling element 20 and a housing 10, wherein the cooling element 20 is sandwiched between two adjacent first walls 101a of two adjacent battery cells 101. The housing 10 includes a support plate 121 for supporting the battery cells 101 and two side walls 122a connected to the support plate 121. The support plate 121 is disposed opposite to the battery cells 101 along a second direction Z perpendicular to the first direction X. The support plate 121 includes a support plate body 1211 and a plurality of reinforcing ribs 1212 located on at least one side of the support plate body 1211 along the second direction Z. The two side walls 122a are spaced apart along a third direction Y, which is perpendicular to both the first direction X and the second direction Z. At least one reinforcing rib 1212 is fixedly connected to the two side walls 122a at its two ends.

[0066] Multiple battery cells 101 arranged along a first direction X are stacked to form a battery cell group. The battery device may include one, two, or more battery cell groups. When the battery device includes two or more battery cell groups, adjacent battery cell groups are arranged along a third direction Y, wherein the first direction X, the second direction Z, and the third direction Y are perpendicular to each other.

[0067] The battery cell 101 includes two first walls 101a arranged opposite each other along a first direction X, and two second walls 101b arranged opposite each other along a third direction Y. The two first walls 101a are symmetrically arranged along the mid-longitudinal section of the battery cell 101, and the two second walls 101b are symmetrically arranged along the mid-transverse section of the battery cell 101. The two first walls 101a and the two second walls 101b together form the sidewalls of the battery cell 101. The area of ​​the first wall 101a is larger than the area of ​​the second wall 101b; the first wall 101a can serve as the large surface of the battery cell 101, and the second wall 101b can serve as the small surface of the battery cell 101.

[0068] It should be noted that the mid-longitudinal section of the battery cell 101 refers to the section at the center position of the battery cell 101 along the third direction Y, and the mid-transverse section of the battery cell 101 refers to the section at the center position of the battery cell 101 along the first direction X.

[0069] A cooling element 20 is sandwiched between two adjacent battery cells 101. The cooling element 20 is used to cool the battery cells 101 on both sides. Specifically, the cooling element 20 is sandwiched between two adjacent first walls 101a of two adjacent battery cells 101, that is, the cooling element 20 is in close contact with the large surface of the battery cell 101, which can achieve a better cooling effect on the battery cell 101.

[0070] In some embodiments, the cooling component 20 may include, but is not limited to, a liquid cooling plate, and the shape of the liquid cooling plate may include, but is not limited to, a flat plate, a tubular shape, or a coil shape.

[0071] The second part 12 of the housing 10 includes a support plate 121 for supporting battery cells 101 and a frame 122 connected to the periphery of the support plate 121. The support plate 121 and the frame 122 enclose a cavity for accommodating multiple battery cells 101. The support plate 121 and the battery cells 101 are disposed opposite to each other along a second direction Z perpendicular to the first direction X. The support plate 121 can be a single-layer plate structure.

[0072] Specifically, the bearing plate 121 includes a bearing plate body 1211 and reinforcing ribs 1212 located on at least one side of the bearing plate body 1211 along the second direction Z. The bearing plate body 1211 is a solid, single-layer plate structure. The reinforcing ribs 1212 are protrusions or thickened structures on the bearing plate body 1211 designed to increase structural rigidity, deformation resistance, and load-bearing capacity; their shapes include, but are not limited to, strip-shaped, grid-shaped, fishbone-shaped, or rib-shaped.

[0073] In some embodiments, the reinforcing rib 1212 is disposed on the side surface of the support plate body 1211 facing the battery cell 101, or the reinforcing rib 1212 is disposed on the side surface of the support plate body 1211 away from the battery cell 101, or the support plate body 1211 is provided with reinforcing rib 1212 on both the side surface of the support plate body 1211 facing the battery cell 101 and the side surface of the support plate body 1211 away from the battery cell 101.

[0074] Please refer to Figures 3-5 The second part 12 of the housing 10 includes a support plate 121 and a frame 122 connected to the perimeter of the support plate 121. The frame 122 is a frame structure, and its two parts arranged opposite each other along a third direction constitute the side wall 122a of the housing 10. It should be noted that the side wall 122a can be a plate structure or a beam structure with a certain cavity inside, for example, it can be made of extruded profile.

[0075] It is understandable that the multiple reinforcing ribs 1212 can be provided only on one side of the bearing plate body 1211 along the second direction Z, or the multiple reinforcing ribs 1212 can be provided on both sides of the bearing plate body 1211 along the second direction Z.

[0076] It should be noted that "fixed connection" here can refer to bonding, welding, riveting, or bolting.

[0077] In some embodiments, the bearing plate body 1211 and the reinforcing rib 1212 can be integrally formed.

[0078] In traditional battery packs, the base plate structure supporting the individual battery cells is typically a thick, heavy, double-layered profile structure to meet the core requirements of structural support, bottom protection, and collision safety. While a thinner, single-layer base plate structure would significantly reduce weight, it would inevitably pose challenges to the requirements of structural support, bottom protection, and collision safety.

[0079] In the technical solution of this application embodiment, by sandwiching the cooling element 20 between the first walls 101a of two adjacent battery cells 101, i.e., adopting a side cooling scheme, part of the support function in the second direction Z, originally borne by the support plate 121, is transferred to the housing 10 structure in the first direction X (i.e., the side wall or frame structure of the housing 10), which can reduce the load-bearing requirements of the support plate 121 in the second direction Z. This allows the support plate body 1211 to be simplified into a single-layer plate structure while meeting the support requirements, which is beneficial for the lightweighting of the battery device. A reinforcing rib 1212 is provided on at least one side of the bearing plate 121 body along the second direction Z, and at least one reinforcing rib 1212 is fixedly connected to two side walls 122a at both ends, which can form a force-bearing frame that connects the lateral structure and the transverse structure. This not only improves the structural stiffness, deformation resistance and load-bearing capacity of the bearing plate 121, but also transmits the lateral impact force through the side wall 122a to the reinforcing rib 1212 and the bearing plate 121 connected to it. The entire box frame participates in absorbing and dispersing the impact energy, thereby improving the battery's resistance to side impact.

[0080] The battery device of this application can be applied to vehicles. While reducing weight, the battery device can enhance the vehicle's resistance to side pole impacts and improve the safety performance of the battery device in the vehicle.

[0081] Please refer to Figures 4-6 In some embodiments, the reinforcing rib 1212 includes a first reinforcing rib 12121 disposed on the side of the support plate body 1211 facing the battery cell 101, and the orthographic projection of the battery cell 101 on the plane perpendicular to the second direction Z is completely offset from the position of the first reinforcing rib 12121.

[0082] like Figure 4 and Figure 5 As shown, the support plate body 1211 is a flat plate structure and is arranged perpendicular to the second direction Z. The orthographic projection of the battery cell 101 on the plane perpendicular to the second direction Z refers to the orthographic projection of the battery cell 101 on the support plate body 1211.

[0083] The orthographic projection of the battery cell 101 onto the plane perpendicular to the second direction Z is completely offset from the location of the first reinforcing rib 12121. For example, the first reinforcing rib 12121 may be located between the orthographic projections of two adjacent battery cells 101 onto the support plate body 1211.

[0084] Combination Figure 2 , Figure 4 and Figure 6As shown, a battery device with the pressure relief structure 1013 of the battery cell 101 facing the support plate 121 is called a bottom-spray battery device. For the bottom-spray battery device, the first reinforcing rib 12121 and the orthographic projection of the battery cell 101 on the plane perpendicular to the second direction Z are completely offset, which takes into account the thermal runaway protection requirements of the battery device. If the first reinforcing rib 12121 is set directly opposite the battery cell 101, once the corresponding battery cell 101 experiences thermal runaway, the high-temperature and high-pressure ejected material will directly impact the first reinforcing rib 12121, hindering pressure relief and directional discharge, which can easily cause a fire. However, by completely offsetting the orthographic projection of the first reinforcing rib 12121 and the battery cell 101 on the plane perpendicular to the second direction Z, the first reinforcing rib 12121 and the support plate body 1211 can form a natural exhaust channel. When the corresponding battery cell 101 experiences thermal runaway, the ejected material can smoothly and quickly be discharged to the designated location along this exhaust channel, greatly reducing the risk of heat spread.

[0085] like Figure 6 As shown, the first reinforcing rib 12121 is set on the side of the support plate body 1211 facing the battery cell 101, which can increase the exhaust space between the support plate body 1211 and the protective component. That is, the exhaust space between the support plate body 1211 and the protective component will not be blocked by the reinforcing rib 1212, so that the battery cell 101 can exhaust smoothly when it runs out of heat.

[0086] Furthermore, the first reinforcing rib 12121 is located between the orthographic projections of two adjacent battery cells 101 onto the support plate body 1211. This directly restricts the lateral expansion and displacement of adjacent battery cells 101, effectively limiting their position and improving structural stability. Moreover, when the battery device is subjected to severe conditions such as bottom ball impacts or scraping, the impact force is first absorbed and dispersed by the high-rigidity frame structure formed by the first reinforcing rib 12121 and the support plate body 1211, preventing concentrated loads from directly acting on the bottom of the battery cells 101 and thus protecting them.

[0087] In addition, by setting the first reinforcing rib 12121 on the side of the support plate body 1211 facing the battery cell 101, while retaining the ability to resist side pole impact, it can also solve the problem that when the whole vehicle is subjected to severe conditions such as bottom ball impact or bottom scraping, the protective component on the side of the support plate body 1211 facing away from the battery cell 101 will not collide with the first reinforcing rib 12121 on the support plate body 1211 and break, resulting in the airtight failure of the entire battery device.

[0088] Please refer to Figure 4 , Figure 6 and Figure 7In some embodiments, the first reinforcing rib 12121 extends along a third direction Y that is perpendicular to both the first direction X and the second direction Z, and a plurality of first reinforcing ribs 12121 are spaced apart along the first direction X.

[0089] In some embodiments, a plurality of first reinforcing ribs 12121 are uniformly arranged on the bearing plate body 1211 along the first direction X, which can improve the uniformity of stiffness of the bearing plate 121.

[0090] In some embodiments, a plurality of first reinforcing ribs 12121 extend in the third direction Y. The first reinforcing ribs 12121 may or may not be connected to the side wall 122a of the housing 10.

[0091] The side of the battery pack along the first direction X is the long side, and the side along the third direction Y is the short side. Due to the battery pack's location on the vehicle, the two side walls 122a of the housing 10 along the third direction Y are typically compressed during a side impact with a vehicle side pillar. By extending the first reinforcing rib 12121 along the third direction Y, the impact, bending, and torsional resistance of the bearing plate 121 in the third direction Y is greatly improved, enabling the battery pack to achieve better side impact protection.

[0092] Please refer to Figure 6 and Figure 7 In some embodiments, the first reinforcing rib 12121 is positioned opposite the cooling element 20 along the second direction Z.

[0093] In other words, the first reinforcing rib 12121 and the cooling component 20 are both located between two adjacent battery cells 101.

[0094] By arranging the first reinforcing rib 12121 and the cooling component 20 directly opposite each other along the second direction Z, the first reinforcing rib 12121 and the cooling component 20 can be arranged between two adjacent battery cells 101, achieving a reasonable layout, improving the space utilization rate inside the battery device, and contributing to the improvement of the energy density of the battery device.

[0095] Please refer to Figure 4 , Figure 6 and Figure 7 In some embodiments, the orthographic projection of the cooling element 20 on the support plate 121 at least partially coincides with the location of the corresponding first reinforcing rib 12121.

[0096] In other words, the first reinforcing rib 12121 and the cooling component 20 share space in the first direction X and the third direction Y.

[0097] By setting the orthographic projection of the cooling component 20 on the support plate 121 to at least partially coincide with the location of the corresponding first reinforcing rib 12121, the first reinforcing rib 12121 and the cooling component 20 can share space, thereby improving the space utilization rate inside the battery device and contributing to the improvement of the energy density of the battery device.

[0098] Please refer to Figure 4 and Figure 7 In some embodiments, the dimension of the cooling element 20 along the first direction X is greater than or equal to the dimension of the corresponding first reinforcing rib 12121 along the first direction X.

[0099] In other words, for the side cooling solution, the setting of the first reinforcing rib 12121 does not increase the spacing between two adjacent battery cells 101. Instead, based on the existing spatial position of the cooling component 20, the first reinforcing rib 12121 is set using the redundant space between the cooling component 20 and the support plate body 1211 in the second direction Z.

[0100] This size design does not increase the spacing between two adjacent battery cells 101, which helps to improve the internal space utilization of the battery device, thereby increasing the energy density of the battery device.

[0101] Please refer to Figure 7 In some embodiments, the cooling member 20 has a groove 201 on the side facing the first reinforcing rib 12121, and the groove 201 is used to accommodate the first reinforcing rib 12121.

[0102] The groove 201 extends in the same direction as the first reinforcing rib 12121. The groove 201 extends through the end of the cooling component 20 along its extension direction. The first reinforcing rib 12121 can be at least partially embedded in the groove 201.

[0103] The first reinforcing rib 12121 cooperates with the groove 201 of the cooling component 20, which can play a good limiting role for the cooling component 20 and the battery cell 101, and can directly limit the lateral expansion and displacement of adjacent battery cells 101, thereby improving the stability of the battery device structure.

[0104] Please refer to Figure 4 and Figure 8 In some embodiments, the reinforcing rib 1212 includes a plurality of second reinforcing ribs 12122 disposed on the side of the support plate body 1211 facing away from the battery cell 101. The second reinforcing ribs 12122 extend along a third direction Y, and the plurality of second reinforcing ribs 12122 are spaced apart along a first direction X.

[0105] In some embodiments, a plurality of second reinforcing ribs 12122 are uniformly arranged on the bearing plate body 1211 along the first direction X, which can improve the stiffness uniformity of the bearing plate 121.

[0106] In some embodiments, a plurality of second reinforcing ribs 12122 extend in the third direction Y. The second reinforcing ribs 12122 may or may not be connected to the side wall 122a of the housing 10.

[0107] In some embodiments, the orthographic projection of the battery cell 101 onto the support plate body 1211 is completely offset from the location of the second reinforcing rib 12122. For example, the second reinforcing rib 12122 is located between the orthographic projections of two adjacent battery cells 101 onto the support plate body 1211. When the battery device is subjected to severe conditions such as bottom ball impact or scraping, the impact force is first absorbed and dispersed by the high-rigidity frame structure formed by the second reinforcing rib 12122 and the support plate body 1211. The location of the second reinforcing rib 12122 is a load concentration area. This design avoids concentrated loads acting directly on the bottom of the battery cell 101, thus protecting the battery cell 101.

[0108] By setting multiple second reinforcing ribs 12122, the rigidity of the bearing plate 121 can be significantly improved. Extending the second reinforcing ribs 12122 along the third direction Y greatly enhances the impact resistance, bending resistance and torsion resistance of the bearing plate 121 in the third direction Y, enabling the battery device to achieve better side impact protection.

[0109] Please refer to Figure 4 and Figure 9 In some embodiments, the reinforcing ribs include a plurality of second reinforcing ribs 12122 disposed on the side of the support plate body 1211 facing away from the battery cell 101, and at least two of the plurality of second reinforcing ribs 12122 are arranged in a cross configuration.

[0110] The phrase "at least two second reinforcing ribs 12122 are arranged in an intersecting manner" refers to the at least two second reinforcing ribs 12122 having their orthogonal projections intersecting on the bearing plate body 1211.

[0111] In some embodiments, a plurality of second reinforcing ribs 12122 are arranged in a cross pattern to form a mesh-like, rib-like, or fishbone-like structure.

[0112] In some embodiments, the orthographic projection of the cross-arranged second reinforcing ribs 12122 on the support plate body 1211 is located between the orthographic projections of two adjacent battery cells 101 on the support plate body 1211. This design avoids concentrated loads acting directly on the bottom of the battery cells 101, thus protecting the battery cells 101.

[0113] Compared to a single-line stiffener structure, the intersecting second stiffeners 12122 have a stronger restraining capacity for deformation (bending, shearing, and torsional deformation) in multiple directions within the plane of the bearing plate body 1211. The intersecting second stiffeners 12122 can distribute the load in all directions, reducing local stress concentration. By intersecting multiple second stiffeners 12122 in multiple directions, the overall stiffness of the bearing plate 121 can be improved using less material.

[0114] Please refer to Figure 4 , Figure 5 and Figure 10 In some embodiments, the reinforcing rib 1212 includes a second reinforcing rib 12122 disposed on the side of the support plate body 1211 facing away from the battery cell 101. On a plane perpendicular to the second direction Z, the orthographic projection of any second reinforcing rib 12122 at least partially coincides with the orthographic projection of a first reinforcing rib 12121.

[0115] In some embodiments, the support plate body 1211 has a first reinforcing rib 12121 on the side facing the battery cell 101, and a second reinforcing rib 12122 on the side facing away from the battery cell 101. On a plane perpendicular to the second direction Z (such as the plane where the support plate body 1211 is located), the orthographic projection of any second reinforcing rib 12122 at least partially coincides with the orthographic projection of a first reinforcing rib 12121.

[0116] By providing reinforcing ribs on both sides of the bearing plate body 1211, and ensuring that the orthographic projection of the second reinforcing rib 12122 on the bearing plate body 1211 at least partially overlaps with the orthographic projection of the first reinforcing rib 12121 on the bearing plate body 1211, it is equivalent to superimposing two directions or two layers of support in the same area of ​​the bearing plate body 1211. This upgrades the original "two-dimensional planar reinforcement system" to a "three-dimensional bending and torsional resistance system," thereby forming a three-dimensional bidirectional support frame for the bearing plate 121. This significantly improves the overall stiffness and deformation resistance of the bearing plate 121. Simultaneously, this double-sided reinforcing rib design helps balance the internal stress on both sides, reducing the overall bending tendency of the plate caused by single-sided reinforcement, and enhancing the stability and durability of the structure.

[0117] Please refer to Figure 4 , Figure 5 and Figure 11 In some embodiments, the reinforcing rib 1212 includes a second reinforcing rib 12122 disposed on the side of the support plate body 1211 facing away from the battery cell 101. On the plane perpendicular to the second direction Z, the orthographic projection of any second reinforcing rib 12122 is completely offset from the orthographic projection of the first reinforcing rib 12121.

[0118] In some embodiments, the support plate body 1211 is provided with a first reinforcing rib 12121 on the side facing the battery cell 101, and a second reinforcing rib 12122 on the side facing away from the battery cell 101. On a plane perpendicular to the second direction Z (such as the plane where the support plate body 1211 is located), the orthographic projection of any second reinforcing rib 12122 is completely offset from the orthographic projection of the first reinforcing rib 12121.

[0119] By providing reinforcing ribs on both the front and back sides of the support plate body 1211, and ensuring that the orthographic projection of any second reinforcing rib 12122 on the plane of the support plate body 1211 is completely offset from the orthographic projection of the first reinforcing rib 12121 on the same plane, this asymmetrical three-dimensional structure enhances its torsional resistance. When the support plate 121 is subjected to a vertical load, the stress distribution on the surface facing the battery cell 101 differs from that on the surface facing away from the battery cell 101. The first reinforcing rib 12121 and the second reinforcing rib 12122, with their offset projections, can be precisely positioned in the areas of maximum stress on their respective surfaces, forming a mechanical complementarity and misalignment reinforcement. This allows for the most effective resistance to complete deformation in both vertical and horizontal directions with minimal material usage, significantly improving the bidirectional bending efficiency of the support plate 121. Simultaneously, this layout creates a space truss-like structure within the cross-section of the support plate 121, effectively resisting torsion and avoiding the problem of excessive local stiffness and mass concentration that might result from overlapping projections, thus contributing to the lightweighting of the battery device.

[0120] Please refer to Figure 12 In some embodiments, the reinforcing rib 1212 includes a reinforcing rib body 1212a and a partition 1212b. The reinforcing rib body 1212a has a cavity, and the partition 1212b is disposed in the cavity and is used to divide the cavity into multiple independent sub-cavities 1212c.

[0121] In some embodiments, the cross-sectional shape of the stiffener body 1212a includes, but is not limited to, a rectangle or a semi-circle. A rectangular cross-section is better at resisting bending, while a semi-circular cross-section can effectively disperse stress concentration.

[0122] The separator 1212b refers to the partition structure used to divide the cavity of the reinforcing rib body 1212a into multiple independent sub-cavities 1212c, such as a partition plate.

[0123] In some embodiments, the reinforcing rib body 1212a and the partition 1212b are integrally formed.

[0124] By setting the interior of the stiffener 1212 to have a structure with multiple independent sub-cavities 1212c, the stiffener 1212's resistance to bending, torsion, and local buckling can be significantly improved by optimizing the internal support structure without significantly increasing the mass, thereby improving the resistance to bending, torsion, and local buckling of the bearing plate 121.

[0125] Please see Figure 5 In some embodiments, the reinforcing rib 1212 is integrally formed with the bearing plate body 1211.

[0126] For example, the reinforcing rib 1212 and the supporting plate body 1211 can be integrally formed by die casting. Specifically, molten raw material can be injected into the mold cavity under high pressure, and then cooled and solidified in one step to form an integral part with the reinforcing rib 1212.

[0127] For example, the reinforcing rib 1212 and the bearing plate body 1211 can be integrally formed by metal extrusion. Specifically, the plate and the reinforcing rib 1212 can be formed in one step by extrusion using a die.

[0128] By integrally molding the reinforcing rib 1212 with the bearing plate body 1211, the weld or bonding surface between the reinforcing rib 1212 and the bearing plate body 1211 can be eliminated, thereby improving the integrity and reliability of the structure, and further improving the overall rigidity and structural strength of the bearing plate 121.

[0129] Please refer to Figures 3-5 In some embodiments, the side of the battery cell 101 facing the support plate 121 is provided with a pressure relief structure 1013, and the orthographic projection of the pressure relief structure 1013 on the support plate 121 is offset from the orthographic projection of the reinforcing rib 1212 on the support plate 121.

[0130] The pressure relief structure 1013 refers to a safety device installed on the battery cell 101 to prevent the battery cell 101 from exploding or thermally running away due to abnormally high internal pressure. It releases internal gas automatically to balance the pressure and ensure the safety of the battery cell 101 and the environment in which it is used.

[0131] A battery device with a pressure relief structure 1013 disposed on the side of the battery cell 101 facing the support plate 121 is called a bottom-spray battery device. For a bottom-spray battery device, the orthographic projection of the pressure relief structure 1013 on the support plate 121 and the orthographic projection of the reinforcing rib 1212 on the support plate 121 are staggered to meet the thermal runaway protection requirements of the battery device. If the reinforcing rib 1212 is positioned directly opposite the battery cell 101, in the event of thermal runaway in the corresponding battery cell 101, the high-temperature, high-pressure ejected material will directly impact the reinforcing rib 1212, hindering pressure relief and directional discharge, potentially causing a fire. However, by staggering the orthographic projection of the pressure relief structure 1013 on the support plate 121 and the orthographic projection of the reinforcing rib 1212 on the support plate 121, the reinforcing rib 1212 will not obstruct pressure relief and directional discharge when the corresponding battery cell 101 experiences thermal runaway, significantly reducing the risk of heat spread.

[0132] Please refer to Figure 4 , Figure 5 and Figure 13 In some embodiments, the battery device further includes a protective element 30, which is located on the side of the support plate body 1211 facing away from the battery cell 101, and the outer periphery of the protective element 30 is fixedly connected to the housing 10.

[0133] The protective component 30 refers to the outermost support plate at the bottom of the housing 10, located on the side of the bearing plate body 1211 away from the battery cell 101. One side is used for assembly and connection with the vehicle chassis, and the outer periphery of the other side is fixedly connected to the outer periphery of the housing 10.

[0134] In some embodiments, the protective element 30 may be a metal material with high strength and high hardness.

[0135] By providing a protective element 30 on the side of the support plate body 1211 facing away from the battery cell 101, the bottom of the battery device can be well protected, thus improving the safety performance of the electrical device.

[0136] Please refer to Figure 4 , Figure 5 and Figure 13 In some embodiments, a smoke exhaust channel is formed between the support plate body 1211 and the protective member 30. The battery cell 101 is provided with a pressure relief structure 1013 on the side facing the support plate body 1211. The support plate 121 is provided with an exhaust hole 1213 at the position opposite to the pressure relief structure 1013. The exhaust hole 1213 is connected to the smoke exhaust channel.

[0137] It should be noted that each battery cell 101 has an exhaust port 1213 directly opposite its pressure relief structure 1013, so that the high-temperature smoke generated by any battery cell 101 after thermal runaway can be discharged into the smoke exhaust channel through the corresponding exhaust port 1213.

[0138] The smoke exhaust channel formed between the bearing plate body 1211 and the protective component 30 refers to the large-area through cavity structure formed between the bearing plate body 1211 and the protective component 30.

[0139] The cavity structure design allows high-temperature fumes generated by any battery cell 101 after thermal runaway to flow freely within the cavity structure, preventing the accumulation of high-temperature fumes in localized areas of the cavity structure and thus avoiding thermal runaway of other battery cells 101. An embodiment of the second aspect of this application provides an electrical device including the battery device as described in any of the above embodiments, the battery device being used to provide electrical energy.

[0140] Electrical devices include vehicles (such as cars, electric vehicles, ships, spacecraft, etc.), display devices (such as mobile phones, tablets, laptops, etc.), electric toys, power tools, etc.

[0141] It is understood that the electrical device provided in this application, by applying the battery device of any of the above embodiments, has all the beneficial effects of the battery device described above, which will not be repeated here.

[0142] An embodiment of the third aspect of this application provides an energy storage device, which includes a battery device as described in any of the above embodiments, the battery device being used for energy storage.

[0143] Energy storage devices can include, but are not limited to, centralized energy storage devices (such as containerized energy storage devices), distributed energy storage devices, mobile energy storage devices, and so on.

[0144] It is understood that the energy storage device provided in this application, by applying the battery device of any of the above embodiments, has all the beneficial effects of the battery device described above, which will not be repeated here.

[0145] The battery device of this application will be described in detail below with reference to specific embodiments, as detailed below.

[0146] like Figures 3-7 As shown, some embodiments of this application provide a battery device including a plurality of battery cells 101, at least some of which are arranged along a first direction X. Each battery cell 101 includes two first walls 101a disposed opposite to each other along the first direction X. The battery device also includes a cooling element 20 and a housing 10. The cooling element 20 is sandwiched between two adjacent first walls 101a of two adjacent battery cells 101. The housing 10 includes a support plate 121 for supporting the battery cells 101. The support plate 121 is disposed opposite to the battery cells 101 along a second direction Z perpendicular to the first direction X. The support plate 121 includes a support plate body 1211 and a first reinforcing rib 12121 located on the side of the support plate body 1211 facing the battery cells 101.

[0147] The device comprises multiple first reinforcing ribs 12121, which are spaced apart along a first direction X. Each first reinforcing rib extends along a third direction Y, and both ends of each rib are fixedly connected to two side walls 122a. These multiple first reinforcing ribs enhance the rigidity of the bearing plate 121 and its resistance to bending and torsion, thereby improving the battery device's side impact protection.

[0148] Furthermore, the first reinforcing rib 12121 is located between the orthographic projections of two adjacent battery cells 101 onto the support plate body 1211. Specifically, the first reinforcing rib 12121 is positioned opposite the cooling element 20 along the second direction Z.

[0149] In other words, the orthographic projection of the cooling component 20 on the support plate 121 at least partially coincides with the location of the corresponding first reinforcing rib 12121. By rationally arranging the first reinforcing rib 12121, the internal space utilization of the battery device is improved, thereby increasing the energy density of the battery device.

[0150] like Figures 3-5 as well as Figure 8 As shown, other embodiments of this application provide a battery device comprising a plurality of battery cells 101, at least some of which are arranged along a first direction X. Each battery cell 101 includes two first walls 101a disposed opposite to each other along the first direction X. The battery device further includes a cooling element 20 and a housing 10, the cooling element 20 being sandwiched between two adjacent first walls 101a of two adjacent battery cells 101. The housing 10 includes a support plate 121 for supporting the battery cells 101, the support plate 121 being disposed opposite to the battery cells 101 along a second direction Z perpendicular to the first direction X. The support plate 121 includes a support plate body 1211 and a second reinforcing rib 12122 located on the side of the support plate body 1211 facing away from the battery cells 101.

[0151] The device comprises multiple second reinforcing ribs 12122, which are spaced apart along the first direction X. Each second reinforcing rib extends along the third direction Y, and both ends of each rib are fixedly connected to two sidewalls 122a. These multiple second reinforcing ribs enhance the rigidity of the support plate 121 and its resistance to bending and torsion, thereby improving the battery device's side impact protection.

[0152] Furthermore, the second reinforcing rib 12122 is located between the orthographic projections of two adjacent battery cells 101 onto the support plate body 1211. Specifically, the second reinforcing rib 12122 is positioned opposite the cooling element 20 along the second direction Z.

[0153] In other words, the orthographic projection of the cooling component 20 onto the support plate 121 at least partially coincides with the location of the corresponding second reinforcing rib 12122. By rationally arranging the second reinforcing ribs 12122, the internal space utilization of the battery device is improved, thereby increasing the energy density of the battery device.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application 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. These 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 application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. 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: A plurality of battery cells, at least some of which are arranged along a first direction, wherein each battery cell includes two first walls disposed opposite to each other along the first direction; A cooling element, sandwiched between two adjacent first walls of two adjacent battery cells; and The housing includes a support plate for supporting the battery cell and two side walls connected to the support plate. The support plate is disposed opposite to the battery cell along a second direction perpendicular to the first direction. The support plate includes a support plate body and a plurality of reinforcing ribs located on at least one side of the support plate body along the second direction. Two sidewalls are spaced apart along a third direction, which is perpendicular to both the first direction and the second direction. At least one of the reinforcing ribs is fixedly connected to two side walls at both ends.

2. The battery device according to claim 1, characterized in that, The reinforcing rib includes a first reinforcing rib disposed on the side of the support plate body facing the battery cell, and the orthographic projection of the battery cell on the plane perpendicular to the second direction is completely offset from the position of the first reinforcing rib.

3. The battery device according to claim 2, characterized in that, The first reinforcing rib extends along a third direction that is perpendicular to both the first direction and the second direction, and a plurality of the first reinforcing ribs are spaced apart along the first direction.

4. The battery device according to claim 2, characterized in that, The first reinforcing rib is positioned opposite the cooling component along the second direction.

5. The battery device according to claim 2, characterized in that, The orthographic projection of the cooling component onto the support plate at least partially coincides with the location of the corresponding first reinforcing rib.

6. The battery device according to claim 2, characterized in that, The dimension of the cooling element along the first direction is greater than or equal to the dimension of the corresponding first reinforcing rib along the first direction.

7. The battery device according to claim 2, characterized in that, The cooling component has a groove on the side facing the first reinforcing rib, and the groove is used to accommodate the first reinforcing rib.

8. The battery device according to any one of claims 1-7, characterized in that, The reinforcing ribs include a plurality of second reinforcing ribs disposed on the side of the support plate body facing away from the battery cell. The second reinforcing ribs extend along the third direction, and the plurality of second reinforcing ribs are spaced apart along the first direction.

9. The battery device according to any one of claims 1-7, characterized in that, The reinforcing ribs include a plurality of second reinforcing ribs disposed on the side of the support plate body facing away from the battery cell, and at least two of the plurality of second reinforcing ribs are arranged in a cross pattern.

10. The battery device according to any one of claims 2-7, characterized in that, The reinforcing rib includes a second reinforcing rib disposed on the side of the bearing plate body facing away from the battery cell. On a plane perpendicular to the second direction, the orthographic projection of any second reinforcing rib at least partially coincides with the orthographic projection of one of the first reinforcing ribs.

11. The battery device according to any one of claims 2-7, characterized in that, The reinforcing rib includes a second reinforcing rib disposed on the side of the bearing plate body facing away from the battery cell. On a plane perpendicular to the second direction, the orthographic projection of any second reinforcing rib is completely offset from the orthographic projection of the first reinforcing rib.

12. The battery device according to any one of claims 1-7, characterized in that, The reinforcing rib includes a reinforcing rib body and a partition. The reinforcing rib body has a cavity, and the partition is disposed in the cavity and is used to divide the cavity into multiple independent sub-cavities.

13. The battery device according to any one of claims 1-7, characterized in that, The reinforcing rib is integrally formed with the bearing plate body.

14. The battery device according to any one of claims 1-7, characterized in that, The battery cell has a pressure relief structure on the side facing the support plate, and the orthographic projection of the pressure relief structure on the support plate is offset from the orthographic projection of the reinforcing rib on the support plate.

15. The battery device according to any one of claims 1-7, characterized in that, Also includes: The protective component is located on the side of the support plate body facing away from the battery cell, and the outer periphery of the protective component is fixedly connected to the housing.

16. The battery device according to claim 15, characterized in that, A smoke exhaust channel is formed between the support plate body and the protective component. The battery cell has a pressure relief structure on the side facing the support plate body. The support plate has an exhaust hole, which is connected to the smoke exhaust channel.

17. An electrical device, characterized in that, The electrical device includes a battery device as described in any one of claims 1 to 16, the battery device being used to provide electrical energy.

18. An energy storage device, characterized in that, The energy storage device includes a plurality of battery devices as described in any one of claims 1 to 16, the battery devices being used to store electrical energy.

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