Battery and electric device

Abstract

A battery (100) comprises battery cells (121) and a case (110). The case (110) comprises a case body (112) and limiting beams (10), the limiting beams (10) being arranged in the case body (112) to define an accommodating space. The battery cells (121) are arranged in the accommodating space. Each limiting beam (10) comprises a first beam side surface (11) and a second beam side surface (12) that are arranged opposite each other in a first direction (X), wherein the second beam side surface (12) is configured as a vertical plane abutting against a large surface of each battery cell (121), the large surface being a side surface of each battery cell (121) with the largest surface area; and at least part of the first beam side surface (11) is inclined towards the second beam side surface (12).

Description

Batteries and electrical devices

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 2024206465228, entitled “Battery and Electrical Device,” filed on March 29, 2024, the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0004] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and power tools.

[0005] During the battery cycle, a beam structure is often used to provide lateral support for the battery cells. The structural strength of the beam structure directly affects the reliability of the battery. Therefore, how to effectively improve the strength of the beam structure is an urgent problem to be solved in battery technology.

[0006] Summary of the Invention

[0007] Based on this, it is necessary to provide a battery and an electrical device to address the problem of low strength of the beam structure.

[0008] The first aspect of the present application provides a battery, comprising a battery cell and a box body; the box body comprises a box body and a limiting beam; the limiting beam is arranged in the box body to define a accommodating space; the battery cell is arranged in the accommodating space; the limiting beam comprises a first beam side surface and a second beam side surface arranged opposite to each other along a first direction; wherein the second beam side surface is configured as a vertical plane abutting against the large surface of the battery cell, the large surface being the side surface with the largest surface area in the battery cell, and at least part of the first beam side surface is inclined toward the second beam side surface.

[0009] In this way, when the battery cell generates expansion and deformation force during the cycle, the angle formed by the inclination of the first beam side surface can make the second beam side surface have stronger support in the first direction, thereby improving the deformation resistance of the second beam side surface along the first direction, and ultimately improving the deformation resistance of the limit beam in the first direction, so that the overall support strength of the limit beam is good, and sufficient constraints are provided to the large surface of the battery cell to prevent it from excessive expansion and deformation.

[0010] In one embodiment, the first beam side includes a first section and a second section connected to each other, with the second section being inclined toward the second beam side. Thus, the second beam side transmits the expansion and deformation forces of the battery cells during cycling to the first beam side. The second section is inclined toward the second beam side, thereby improving the deformation resistance of the limit beam in the first direction and preventing battery failure caused by excessive expansion and deformation of the battery cells during cycling.

[0011] In one embodiment, the first section and the second section are coplanar; or, the first section and the side surface of the second beam are parallel. In this manner, the first section and the side surface of the second beam are both vertical planes, allowing the end of the support beam that abuts the first section to be machined into a vertical plane rather than an inclined surface, thereby facilitating the fixation of the two in the first direction.

[0012] In one embodiment, the second beam side and the second section have an included angle A, 0°<A≤20°. Thus, during the cycling of the battery cell, if the amount of expansion is small, the included angle between the second beam side and the second section can be appropriately reduced to free up a larger energy area for placing the battery cell. If the amount of expansion is large, the included angle between the second beam side and the second section can be increased to obtain a better support effect.

[0013] In one embodiment, the battery further includes at least one support beam, one end of the support beam being connected to the side surface of the first beam along a first direction. By abutting the side surface of the first beam along the first direction with the one end of the support beam, the angle of the side surface of the first beam can provide strong support for the side surface of the second beam, thereby improving the deformation resistance of the side surface of the second beam along the first direction, thereby improving the overall support strength of the limit beam, and thus providing sufficient restraint to the large surface of the battery cell to prevent expansion and deformation.

[0014] In one embodiment, the limiting beam extends along the second direction, intersecting the first and second directions. The battery includes multiple support beams, which are spaced apart along the second direction and connected to the side surfaces of the first beam along the first direction. Thus, each limiting beam corresponds to multiple support beams, thereby distributing the expansion and deformation force transmitted by the limiting beam to the box body.

[0015] In one embodiment, one end of the support beam is connected to the first section along a first direction. Thus, the second section is tilted toward the side of the second beam, and one end of the support beam abuts the first section along the first direction. The expansion and deformation force of the battery cells during cycling is transmitted to the side of the first beam via the side of the second beam. The abutment of the first section against the support beam transmits the aforementioned force to the support beam, thereby preventing excessive expansion and deformation of the battery cells during cycling, which could lead to battery failure.

[0016] In one embodiment, the position-limiting beam includes at least one supporting rib connected between the first beam side surface and the second beam side surface. This supports the second beam side surface, thereby increasing the second beam side surface's ability to resist deformation along the first direction and further enhancing the position-limiting beam's support for the battery cell.

[0017] In one embodiment, the support ribs are arranged at an angle relative to the first direction. Thus, when a battery cell generates expansion and deformation forces during cycling, the support ribs connected to the side surfaces of the second beam can redirect the expansion and deformation forces generated in the first direction and transmit them to the side surfaces of the first beam, and then to the support beam. This increases the overall stiffness of the limit beam in resisting deformation in the first direction and effectively prevents excessive expansion and deformation of the battery cell during cycling.

[0018] In one embodiment, the position-limiting beam includes multiple support ribs, with at least two adjacent support ribs spaced apart and inclined in opposite directions relative to the first direction. Thus, the multiple support ribs supported between the first and second beam sides can separate the inner cavity of the position-limiting beam into a non-quadrilateral cavity that is less susceptible to deformation, further improving the overall rigidity of the position-limiting beam. This ensures that the second beam side can transmit the expansion and deformation forces of the battery cells during cycling to the first beam side, and then to the support beam, effectively preventing excessive expansion and deformation of the battery cells during cycling.

[0019] In one embodiment, at least one support rib is fixedly connected to the junction of the first and second sections at one end away from the side of the second beam. This allows the side of the second beam to transmit the expansion and deformation forces of the battery cells to the junction of the first and second sections through the support rib, thereby achieving greater support force and improving the overall stiffness of the limit beam.

[0020] In one embodiment, the side surface of the second beam comprises an upper section, a middle section, and a lower section evenly divided along its height. The number of support ribs connected to the middle section is no less than the number of support ribs connected to the upper section or the lower section. Concentrating the support ribs in the middle section of the side surface of the second beam provides better support for the side surface of the second beam, increasing the overall stiffness of the limit beam and effectively preventing excessive expansion and deformation of the battery cells during cycling.

[0021] In one embodiment, all support ribs are connected at one end to the middle section. This provides a relatively better support effect for a given weight, ensuring the overall rigidity of the limit beam while avoiding excessive weight caused by excessive support ribs, thereby increasing the energy density of the battery.

[0022] In one embodiment, the limiting beam further includes a top surface and a bottom surface; the top surface and the bottom surface are respectively connected to two ends of the first beam side surface and the second beam side surface to enclose an internal cavity of the limiting beam.

[0023] In one embodiment, the limiting beam includes a support plate connected between the top and bottom surfaces to separate the internal cavity of the limiting beam into a first sub-cavity and a second sub-cavity. This, through the support plate, forms the limiting beam into a multi-cavity, three-dimensional structure, which helps improve the overall rigidity of the limiting beam, thereby ensuring that the side surface of the second beam can transmit the expansion and deformation force of the battery cell during cycling to the side surface of the first beam, and then to the support beam, effectively preventing excessive expansion and deformation of the battery cell during cycling.

[0024] In one embodiment, the position-limiting beam includes at least one first sub-rib and at least one second sub-rib; the first sub-rib is connected between the side of the first beam and the support plate; the second sub-rib is connected between the support plate and the side of the second beam. Thus, the second sub-rib connected between the support plate and the side of the second beam provides strong support for the side of the second beam. Furthermore, the first sub-rib is connected between the side of the first beam and the support plate, also providing strong support for the support plate. This improves the position-limiting beam's ability to resist deformation along the first direction, further enhancing the position-limiting beam's ability to restrain expansion and deformation of the battery cells.

[0025] In one embodiment, the support plate includes a first sub-plate and a second sub-plate connected to each other, with the second sub-plate being tilted toward the side surface of the second beam; the first sub-plate and the second sub-plate being coplanar; or the first sub-plate being parallel to the side surface of the second beam. In this manner, the first and second sub-plates form the inner cavity of the limiting beam into an irregular polygonal cavity. This cavity structure improves the overall rigidity of the limiting beam, thereby ensuring that the side surface of the second beam can transmit the expansion and deformation force of the battery cells during cycling to the side surface of the first beam, and then to the support beam, effectively preventing excessive expansion and deformation of the battery cells during cycling.

[0026] In one embodiment, one end of a first sub-rib is fixedly connected to the junction of the first section and the second section; the other end of the first sub-rib is fixedly connected to the junction of the first sub-plate and the second sub-plate; one end of a second sub-rib is fixedly connected to the junction of the first sub-plate and the second sub-plate, and the other end of the second sub-rib is connected to the side surface of the second beam. This allows for effective force transmission, thereby providing greater support for the limit beam, improving the overall stiffness of the limit beam, and ultimately effectively preventing excessive expansion and deformation of the battery cells during cycling.

[0027] In one embodiment, the first sub-rib is arranged parallel to the first direction, and the second sub-rib is arranged obliquely relative to the first direction. Thus, when a battery cell generates an expansion and deformation force during cycling, the second sub-rib connected to the side surface of the second beam can redirect the expansion and deformation force generated in the first direction and transmit it to the support plate. The support plate then transmits the expansion and deformation force along the first direction to the side surface of the first beam via the first sub-rib. This expansion and deformation force can then be transmitted to the support beam, thereby increasing the overall stiffness of the limit beam in resisting deformation in the first direction and effectively preventing excessive expansion and deformation of the battery cell during cycling.

[0028] In one embodiment, the limiting beam includes a plurality of first sub-ribs and a plurality of second sub-ribs; two adjacent first sub-ribs are spaced apart and arranged parallel to each other; and / or two adjacent second sub-ribs are spaced apart and arranged crosswise. In this way, the first sub-ribs connected between the side of the first beam and the support plate can separate the first sub-cavity into a non-deformable quadrilateral cavity, and the second sub-ribs supported between the support plate and the side of the second beam can separate the second sub-cavity into a non-deformable quadrilateral cavity. This further improves the overall rigidity of the limiting beam and effectively prevents excessive expansion and deformation of the battery cells during cycling.

[0029] In one embodiment, each second sub-rib is connected to the same area of ​​the support plate as the corresponding first sub-rib. This ensures a one-to-one correspondence between the first and second sub-ribs, and the three intersections of the first and second sub-ribs with the support plate. This provides greater rigidity, creating stronger support within the limiting beam, thereby increasing the limiting beam's resistance to deformation along the first direction and ultimately effectively enhancing the limiting beam's support for the battery cells.

[0030] In one embodiment, the side surface of the second beam includes an upper section, a middle section, and a lower section evenly divided along its height direction; the number of second sub-rebars connected to the middle section is not less than the number of second sub-rebars connected to the upper section or the lower section.

[0031] In this way, the number of second sub-ribs connected to the middle section is set to be relatively more, the number of second sub-ribs connected to the upper section is set to be relatively less, and the number of second sub-ribs connected to the lower section c is set to be relatively less; the expansion and deformation force of the battery cell during the cycle is first transmitted to the side of the second beam, and then transmitted to the support plate through the second sub-ribs, and then transmitted to the side of the first beam through multiple first sub-ribs corresponding to the second sub-ribs, ensuring the overall stiffness of the limit beam and effectively avoiding excessive expansion and deformation of the battery cell during the cycle.

[0032] In one embodiment, all second sub-ribs are connected to the middle section. This allows for a relatively better support effect given a given weight of the limit beam, ensuring the overall rigidity of the limit beam while avoiding excessive weight from excessive second sub-ribs, thereby increasing the energy density of the battery.

[0033] A second aspect of the present application provides an electrical device comprising the above-mentioned battery, wherein the battery is used to provide electrical energy.

[0034] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on the drawings without inventive work. In the drawings:

[0036] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application.

[0037] FIG2 is a schematic diagram of the exploded structure of a battery provided in some embodiments of the present application.

[0038] FIG3 is a schematic structural diagram of a battery module provided in some embodiments of the present application.

[0039] FIG4 is a schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application.

[0040] FIG5 is a schematic diagram of the assembly of a box and a battery cell provided in some embodiments of the present application.

[0041] FIG6 is a schematic diagram of the assembly of a box and a battery cell provided in some embodiments of the present application from a top view.

[0042] FIG7 is a BB cross-sectional view of the structure shown in FIG6 .

[0043] FIG8 is a schematic diagram of a partial structure of the assembly of a box body and a battery cell provided in some other embodiments of the present application.

[0044] FIG9 is a schematic diagram of a partial structure of the assembly of a box body and a battery cell provided in some further embodiments of the present application.

[0045] Reference numerals

[0046] Vehicle 1000; battery 100, housing 110, housing cover 111, housing body 112, battery module 120, battery cell 121, end cap 122, housing 123, electrode assembly 124, electrode terminal 125, controller 200, motor 300; positioning beam 10, first beam side 11, first section 11a, second section 11b, second beam side 12, upper section 12a, middle section 12b, lower section 12c, supporting rib 13, first sub-rib 13a, second sub-rib 13b, top surface 14, bottom surface 15, supporting plate 16, first sub-plate 16a, second sub-plate 16b, first sub-cavity 18, second sub-cavity 17, supporting beam 20.

[0047] The direction indicated by X is the first direction, and the direction indicated by Y is the second direction. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0050] In the description of the embodiments of the present application, if the technical terms "first" and "second" appear, these terms are only used for descriptive purposes to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0051] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0053] In the description of the embodiments of this application, if the term "plurality" appears, "plurality" means at least two (including two), for example, two, three, etc., unless otherwise specifically defined. Similarly, if the term "multiple groups" appears, "multiple groups" means two or more groups (including two), and if the term "multiple sheets" appears, "multiple sheets" means two or more sheets (including two).

[0054] In the description of the embodiments of the present application, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0055] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if technical terms such as "installed", "connected", "connected", and "fixed" appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0056] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0057] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0058] Currently, market developments indicate that power batteries are becoming increasingly widely used. Power batteries are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in aerospace and other fields. As power battery applications continue to expand, market demand is also growing.

[0059] In related technologies, the beam structure of a battery is usually formed by a combination of a frame with a cavity. The cavity not only reduces the weight of the beam structure, but also gives the beam structure a certain energy absorption capacity, reducing the deformation of the beam structure when it is subjected to external impact; however, this method will lead to a decrease in the structural strength of the beam structure; in addition, in some structures, reinforcement parts are arranged in the cavity of the beam structure to improve the rigidity, but the reinforcement parts and the frame are often connected by welding, and there will inevitably be weak connection points, which in turn affects the overall structural strength and rigidity of the beam structure.

[0060] Based on the above considerations, a limiting beam can be provided within the box to define a storage space for accommodating the battery cell. The limiting beam includes a first beam side surface and a second beam side surface that are arranged opposite each other. The second beam side surface is configured as a vertical plane for contacting the large surface of the battery cell, and at least a portion of the first beam side surface is inclined toward the second beam side surface. In this way, by setting the first beam side surface to be inclined toward the second beam side surface to form an angle, when the battery cell generates an expansion and deformation force during the cycle, the angle formed by the inclination of the first beam side surface can provide strong support for the second beam side surface in a specific direction, thereby improving the deformation resistance of the second beam side surface in the specific direction, and ultimately improving the deformation resistance of the limiting beam in the specific direction, so that the overall support strength of the limiting beam is good, and sufficient constraints are provided to the large surface of the battery cell to prevent it from excessive expansion and deformation.

[0061] The embodiments of the present application provide a battery and an electrical device, which may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0062] It should be understood that the technical solutions generally described in the embodiments of the present application are not limited to the batteries and electrical devices described above, but can also be applied to all batteries including boxes and electrical devices using batteries. However, for the sake of simplicity of description, an electrical device in an embodiment of the present application is taken as an example of vehicle 1000.

[0063] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0064] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0065] Figure 2 is an exploded view of a battery 100 according to some embodiments of the present application; Figure 3 is a schematic diagram of the structure of a battery module according to some embodiments of the present application. Referring to Figures 2 and 3, to meet varying power requirements, the battery 100 may include multiple battery cells 121 and a housing 110. A battery cell 121 is the smallest unit that makes up a battery module 120 or battery pack. Multiple battery cells 121 can be connected in series and / or in parallel via electrode terminals for various applications.

[0066] The housing 110 can have a variety of structures. In some embodiments, the housing 110 can include a lid 111 and a body 112. The lid 111 and body 112 cover each other, and together define a storage space for accommodating the battery cells 121. The body 112 can be a hollow structure with one end open, and the lid 111 can be a plate-like structure. The lid 111 covers the open side of the body 112, so that the lid 111 and body 112 together define a storage space. The lid 111 and body 112 can also be hollow structures with one end open, with the open side of the lid 111 covering the open side of the body 112. Of course, the housing 110 formed by the lid 111 and body 112 can have a variety of shapes, such as a simple three-dimensional structure such as a single rectangular parallelepiped, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as rectangular parallelepipeds, cylinders, or spheres. This is not limited in the present embodiment. The material of the box body 110 can be an alloy material such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin, and the embodiment of the present application is not limited to this.

[0067] In the embodiments of the present application, multiple battery cells 121 can be directly assembled into a battery pack, or they can be first assembled into a battery module 120, which can then be assembled into a battery pack. Specifically, multiple battery cells 121 can be directly connected in series, parallel, or in a hybrid manner to form a whole, which can then be housed within the housing 110. Alternatively, multiple battery cells 121 can be first connected in series, parallel, or in a hybrid manner to form a battery module 120, which can then be assembled into a whole, which can then be housed within the housing 110.

[0068] The battery 100 may further include other structures. For example, the battery 100 may further include a busbar component for achieving electrical connection between the plurality of battery cells 121 .

[0069] Each battery cell 121 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 121 can be cylindrical, flat, rectangular, or in other shapes. Battery cells 121 are generally divided into three types based on the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells. The embodiments of this application do not limit this. However, for the sake of simplicity, the following embodiments are all described using a square lithium-ion battery cell 121 as an example.

[0070] Please refer to Figure 4, which is a schematic diagram of the exploded structure of a battery cell 121 provided in some embodiments of the present application. The battery cell 121 includes an end cap 122, a housing 123, an electrode assembly 124, and other functional components.

[0071] The end cap 122 is a component that covers the opening of the housing 123 to isolate the internal environment of the electrode assembly 124 from the external environment. The shape of the end cap 122 can be adapted to the shape of the housing 123 to fit the housing 123. In some embodiments, the end cap 122 can be made of a material with a certain degree of hardness and strength (such as an aluminum alloy). This prevents the end cap 122 from deforming when subjected to compression or collision, thereby enhancing the structural strength and safety of the battery cell 121. Functional components such as the electrode terminal 125 can be provided on the end cap 122. The electrode terminal 125 can be used to electrically connect to the electrode assembly 124 to transmit or receive electrical energy from the battery cell 121. In some embodiments, the end cap 122 can also be provided with a pressure relief mechanism to release internal pressure when the internal pressure or temperature of the battery cell 121 reaches a threshold. The end cap 122 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this is not particularly limited in the present embodiment. In some embodiments, an insulating member may be provided inside the end cap 122 to isolate the electrical connection components in the housing 123 from the end cap 122 to reduce the risk of short circuit.

[0072] The shell 123 is a component used to cooperate with the end cap 122 to form the internal environment of the battery cell 121, wherein the formed internal environment can be used to accommodate the electrode assembly 124, electrolyte and other components. The shell 123 and the end cap 122 can be independent components. An opening can be set on the shell 123, and the internal environment of the battery cell 121 is formed by covering the opening with the end cap 122. Without limitation, the end cap 122 and the shell 123 can also be integrated. Specifically, the end cap 122 and the shell 123 can form a common connection surface before other components are inserted into the shell. When the interior of the shell 123 needs to be encapsulated, the end cap 122 is then covered with the shell 123. The shell 123 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 123 can be determined according to the specific shape and size of the electrode assembly 124. The shell 123 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0073] The electrode assembly 124 is a component in the battery cell 121 where electrochemical reactions occur. One or more electrode assemblies 124 may be contained in the housing 123. The electrode assembly 124 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 124, and the parts of the positive and negative electrode sheets without active materials each constitute a tab (not shown). The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals 125 to form a current loop.

[0074] Figure 5 is a schematic diagram of the assembly of the box and the battery cell provided in some embodiments of the present application; Figure 6 is a schematic diagram of the assembly of the box and the battery cell provided in some embodiments of the present application from a top view; Figure 7 is a BB cross-sectional view of the structure shown in Figure 6; Figure 8 is a schematic diagram of the partial structure of the assembly of the box and the battery cell provided in other embodiments of the present application; Figure 9 is a schematic diagram of the partial structure of the assembly of the box and the battery cell provided in still other embodiments of the present application.

[0075] 1 to 9 , a first aspect of the present application provides a battery 100 .

[0076] The battery 100 includes a battery cell 121 and a housing 110. The housing 110 includes a housing body 112 and a limiting beam 10. The limiting beam 10 is disposed within the housing body 112 to define a storage space, also known as an energy zone, for accommodating the battery cell 121. The battery cell 121 is disposed within the storage space.

[0077] Specifically, the limiting beam 10 is used to be placed in the box 110 as the side wall of the energy zone. The energy zone can accommodate multiple battery cells 121 or battery modules 120 to prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 121. The limiting beam 10 can abut against the large surface of the battery cell 121 along the first direction X, thereby avoiding free deformation.

[0078] The limiting beam 10 includes a first beam side surface 11 and a second beam side surface 12 arranged opposite each other along a first direction X. The second beam side surface 12 is configured as a vertical plane for contacting the large surface of the battery cell 121, and at least a portion of the first beam side surface 11 is inclined toward the second beam side surface 12. In various embodiments of the present application, the large surface refers to the side of the battery cell 121 with the largest surface area.

[0079] 5-9 , in each embodiment of the present application, the battery cell 121 is disposed on one side of the limiting beam 10 along the first direction X.

[0080] The second beam side surface 12 is located on the side of the limiting beam 10 facing the battery cell 121 and is used to abut against the large surface of the battery cell 121. In this way, the force borne by the second beam side surface 12 along the first direction X is relatively large, which can be used to resist the expansion and deformation force of the battery cell 121 of the battery during the cycle process.

[0081] At least a portion of the first beam side surface 11 is tilted toward the second beam side surface 12. This allows the first beam side surface 11 to provide stronger support for the second beam side surface 12 in the first direction X when the battery cell 121 experiences expansion and deformation during cycling. This angle, formed by the tilt of the first beam side surface 11, further enhances the deformation resistance of the second beam side surface 12 in the first direction X, ultimately improving the deformation resistance of the position-limiting beam 10 in the first direction X. This provides superior overall support strength for the position-limiting beam 10 and provides sufficient restraint on the large surfaces of the battery cell 121, preventing it from excessive expansion and deformation. In some embodiments, the increased rigidity of the position-limiting beam 10 can also avoid the problem of excessive weight resulting from continuously increasing the wall thickness of the position-limiting beam 10, ultimately effectively improving the overall energy density of the battery.

[0082] In some embodiments, the second beam side surface 12 and the first beam side surface 11 have an included angle A, where 0°<A≤20°. As an example, the included angle A between the second beam side surface 12 and the first beam side surface 11 can be, but is not limited to, 1°, 3°, 5°, 6°, 8°, 10°, 14°, 17°, 20°, etc.

[0083] In some embodiments, referring to Figures 1 to 9 , the limiting beam 10 further includes a top surface 14 and a bottom surface 15. The top surface 14 and the bottom surface 15 are respectively connected to the two ends of the first beam side surface 11 and the second beam side surface 12 to enclose an internal cavity of the limiting beam 10. The top surface 14 and the bottom surface 15 can be integrally connected with the first beam side surface 11 and the second beam side surface 12 to define a complete internal cavity. The integral connection process can reduce the weak connection points between the various surfaces of the limiting beam 10, and is conducive to improving the overall structural strength and rigidity of the limiting beam 10. At the same time, the integrally formed limiting beam 10 can also simplify the overall process flow, which is conducive to improving production efficiency and reducing costs.

[0084] The cavity inside the limiting beam 10 can provide a deformation space for the limiting beam 10 to absorb energy and reduce the overall weight of the limiting beam 10, which is beneficial to improving the energy density of the battery.

[0085] The limiting beam 10 can be a hollow beam structure integrally formed from a plate or rod through a process such as stamping / extrusion or metal casting. The wall thickness of the limiting beam 10 can range from 1 mm to 8 mm, depending on actual needs, with 3 mm to 5 mm being more common. At this wall thickness, the limiting beam 10 offers a good price-performance ratio, combining lightweight construction with good structural strength, effectively suppressing expansion and deformation of the battery cells 121 during cycling.

[0086] The limiting beam 10 can be made of, but is not limited to, steel, iron, aluminum, and aluminum alloy.

[0087] In some possible embodiments, referring to FIG. 8 , the first beam side surface 11 includes a first section 11 a and a second section 11 b connected to each other, and the second section 11 b is inclined toward the second beam side surface 12 .

[0088] In this way, the second beam side 12 transmits the expansion and deformation force of the battery cell 121 during the cycle to the first beam side 11, and the second section 11b is inclined toward the second beam side 12, thereby improving the deformation resistance of the limiting beam 10 in the first direction X, and avoiding excessive expansion and deformation of the battery cell 121 during the cycle, which may cause battery failure.

[0089] In some embodiments, the first section 11 a and the second section 11 b are integrally connected, thereby being able to support the wall of the limiting beam 10 and effectively improving the overall structural strength of the limiting beam 10 .

[0090] In some possible embodiments, referring to Figures 5 to 9 , the battery 100 includes at least one support beam 20. One end of the support beam 20 is connected to the first beam side surface 11 along the first direction X.

[0091] The limiting beam 10 resists the expansion and deformation force of the battery cell 121 of the battery 100 during the cycle in the first direction X. The force is transmitted between the first beam side surface 11 and the second beam side surface 12. By abutting one end of the support beam 20 against the first beam side surface 11 along the first direction X, the angle of the first beam side surface 11 can form a strong support for the second beam side surface 12, thereby improving the deformation resistance of the second beam side surface 12 along the first direction X, so that the overall support strength of the limiting beam 10 is good, thereby providing sufficient constraints to the large surface of the battery cell 121 to prevent expansion and deformation.

[0092] In some embodiments, the support beam 20 is a hollow beam having a certain length. The support beam 20 is arranged in the box body 112 and extends along the first direction X. The cross-sectional shape of the support beam 20 along the direction perpendicular to its own length can be but is not limited to rectangular, elliptical, L-shaped, trapezoidal, etc.

[0093] The support beam 20 and the box body 112 can be connected by welding, bolting, or clamping. With one end of the support beam 20 abutting against the first beam side surface 11 along the first direction X, the force of expansion and deformation of the battery cell 121 during the cycle acts on the second beam side surface 12 of the limiting beam 10, and is then transmitted from the first beam side surface 11 to the support beam 20, ultimately acting on the box body 112, thereby preventing excessive expansion and deformation of the battery cell 121 during the cycle from causing battery failure.

[0094] In some embodiments, the support beam 20 may be a plate or a hollow beam structure. The support beam 20 may be made of, but is not limited to, steel, iron, aluminum, or aluminum alloy.

[0095] In some possible embodiments, one end of the support beam 20 is connected to the first section 11 a along the first direction.

[0096] Among them, the second section 11b is inclined toward the second beam side 12, and one end of the support beam 20 is connected to the first section 11a along the first direction; the expansion and deformation force of the battery cell 121 during the cycle is transmitted to the first beam side 11 through the second beam side 12, and the first section 11a is connected to the support beam 20 to transmit the above-mentioned force to the support beam 20, thereby avoiding excessive expansion and deformation of the battery cell 121 during the cycle, which may cause battery function failure.

[0097] In some possible embodiments, as shown in FIG7 , the first section 11 a and the second section 11 b are coplanar, so that the first beam side surface 11 is a single solid surface, which is convenient for processing and forming.

[0098] In other possible embodiments, as shown in Figures 8 and 9 , the first section 11a is disposed parallel to the second beam side 12. Thus, the first section 11a and the second beam side 12 are both vertical planes. This facilitates the connection of the support beam 20 to the first section 11a by forming a vertical plane, rather than an inclined surface, to facilitate securing the two in the first direction X.

[0099] In some possible embodiments, as shown in Figures 1 to 9 , the second beam side surface 12 and the second section 11b have an angle A, where 0 degrees (°) < A ≤ 20 degrees (°). By way of example, the angle A between the second beam side surface 12 and the second section 11b can be, but is not limited to, 1°, 3°, 5°, 6°, 8°, 10°, 14°, 17°, 20°, etc. During the cycling of the battery cell 121, if the amount of expansion is small, the angle A between the second beam side surface 12 and the second section 11b can be appropriately reduced, with a minimum of 1°, thereby freeing up a larger energy area for the battery cell 121. If the amount of expansion is large, the angle A between the second beam side surface 12 and the second section 11b can be increased to 20°, and the position of the internal support ribs 13 (described below) can be adjusted to achieve better support.

[0100] It can be understood that since the second section 11b is tilted toward the second beam side 12, there is also an angle between the second section 11b and the first section 11a; by setting this angle, the force of the expansion and deformation of the battery cell 121 of the battery during the cycle can be effectively transmitted to the second section 11b through the second beam side 12, and then to the first section 11a, and finally to the support beam 20, thereby effectively improving the deformation resistance of the limiting beam 10 in the first direction X, and then giving the limiting beam 10 stronger support stiffness to provide sufficient constraints to the large surface of the battery cell 121.

[0101] In some possible embodiments, referring to FIG. 1 to FIG. 8 , the position-limiting beam 10 includes at least one supporting rib 13 , and the supporting rib 13 is connected between the first beam side surface 11 and the second beam side surface 12 .

[0102] 5-7 , in the embodiment of the present application, the battery cell 121 is disposed on one side of the limiting beam 10 along the first direction X.

[0103] The expansion and deformation of the battery cell 121 during operation exerts a force on the limiting beam 10, with the component of this force along the first direction X being relatively large. Consequently, the second beam side surface 12 of the limiting beam 10 bears a relatively large force along the first direction X. The support ribs 13 connected between the first beam side surface 11 and the second beam side surface 12 provide strong support for the second beam side surface 12, thereby increasing the deformation resistance of the second beam side surface 12 along the first direction X and further enhancing the supporting effect of the limiting beam 10 on the battery cell 121.

[0104] In some embodiments, the number of support ribs 13 can be but is not limited to one, two, three or more.

[0105] In some embodiments, the support ribs 13 may be made of, but are not limited to, steel, iron, aluminum, or aluminum alloy. The support ribs 13 may be integrally formed with the limiting beam 10, or may be fixed between the first beam side 11 and the second beam side 12 by welding, threading, or other methods, which are not limited in this application.

[0106] In some possible embodiments, referring to FIG. 7 and FIG. 8 , the support ribs 13 are arranged to be inclined relative to the first direction X.

[0107] In this way, when the battery cell 121 generates expansion and deformation force during the cycle, the support rib 13 connected to the second beam side 12 can change the direction of the expansion and deformation force obtained in the first direction X and transfer it to the first beam side 11, and then transfer it to the support beam 20, thereby improving the overall stiffness of the limiting beam 10 in resisting deformation in the first direction X, and effectively avoiding excessive expansion and deformation of the battery cell 121 during the cycle.

[0108] In some possible embodiments, as shown in Figures 7 and 8 , the limiting beam 10 includes a plurality of support ribs 13 , with at least two adjacent support ribs 13 spaced apart from each other and inclined in opposite directions relative to the first direction X. Specifically, the plurality of support ribs 13 supported between the first beam side surface 11 and the second beam side surface 12 can separate the inner cavity of the limiting beam 10 into a non-quadrilateral cavity that is less susceptible to deformation, further improving the overall rigidity of the limiting beam 10 , thereby ensuring that the second beam side surface 12 can transmit the expansion and deformation force of the battery cells 121 during cycling to the first beam side surface 11 and then to the support beam 20 , effectively preventing excessive expansion and deformation of the battery cells 121 during cycling.

[0109] In some possible embodiments, as shown in Figures 1 to 8 , at least one support rib 13 is fixedly connected to the junction of the first section 11a and the second section 11b at one end distal from the second beam side surface 12. Specifically, one end of a support rib 13 is connected to the second beam side surface 12, and the other end of the support rib 13 is fixedly connected to the junction of the first section 11a and the second section 11b. In this way, the second beam side surface 12 can transmit the expansion and deformation force of the battery cells 121 to the junction of the first section 11a and the second section 11b through the support rib 13, thereby achieving greater support force and improving the overall stiffness of the limiting beam 10.

[0110] In some possible embodiments, the second beam side surface 12 includes an upper section 12a, a middle section 12b, and a lower section 12c evenly divided along its height direction; the number of supporting ribs 13 connected to the middle section 12b is not less than the number of supporting ribs 13 connected to the upper section 12a or the lower section 12c.

[0111] Since the top of the battery cell 121 has an end cap 122 and the bottom is the bottom of the shell 123, the end cap 122 and the bottom of the shell 123 can form a good restraint force on the electrode assembly 124 to prevent deformation. Therefore, for the battery cell 121, the expansion generated during the cycle is mainly concentrated in the middle area of ​​the shell 123, that is, the area corresponding to the middle section 12b of the second beam side 12.

[0112] Therefore, through the above-mentioned setting, more support ribs 13 are concentratedly connected to the middle section 12b of the second beam side surface 12, which can better support the second beam side surface 12, so as to improve the overall stiffness of the limiting beam 10, thereby effectively suppressing the excessive expansion and deformation of the battery cell 121 during the cycle process.

[0113] It is understandable that, in the embodiment of the present application, the second beam side surface 12 is equal to the height of the battery cell 121 , and the middle section 12 b is configured to abut against the middle region of the battery cell 121 .

[0114] In the embodiment of the present application, at least most of the support ribs 13 should be supported on the middle section 12b at one end. In the specific setting, one end of all the support ribs 13 can be connected to the middle section 12b, and the other ends of all the support ribs 13 can be supported on the first section 11a and / or the second section 11b of the first beam side 11 at dispersed intervals; thereby obtaining a relatively better support effect under a certain weight; it can ensure the overall stiffness of the limiting beam 10, and avoid overweight caused by setting too many support ribs 13, thereby improving the energy density of the battery.

[0115] In some possible embodiments, as shown in FIG9 , the limiting beam 10 includes a support plate 16 connected between the top surface 14 and the bottom surface 15 to separate the internal cavity of the limiting beam 10 into a first sub-cavity 18 and a second sub-cavity 17. Thus, the supporting plate 16 forms the limiting beam 10 into a multi-cavity, three-dimensional structure, which helps improve the overall rigidity of the limiting beam 10. This ensures that the second beam side surface 12 can transmit the expansion and deformation force of the battery cells 121 during cycling to the first beam side surface 11, and then to the support beam 20, effectively preventing excessive expansion and deformation of the battery cells 121 during cycling.

[0116] As shown in Figure 9, the extension direction of the support plate 16 can be maintained parallel to the second beam side 12; the internal cavity of the limiting beam 10 is divided into a first sub-cavity 18 and a second sub-cavity 17, the first sub-cavity 18 is formed by the top surface 14, the first section 11a, the second section 11b, the bottom surface 15 and the support plate 16 in sequence, and the second sub-cavity 17 is formed by the top surface 14, the support plate 16, the bottom surface 15 and the second beam side 12 in sequence; the cross-sections of the first sub-cavity 18 and the second sub-cavity 17 can be square, diamond or other irregular polygons.

[0117] In some possible embodiments, as shown in FIG9 , the position-limiting beam 10 includes at least one first sub-rib 13a and at least one second sub-rib 13b. The first sub-rib 13a is disposed in the first sub-cavity 18 and connects between the first beam side 11 and the support plate 16 ; the second sub-rib 13b is disposed in the second sub-cavity 17 and connects between the support plate 16 and the second beam side 12 .

[0118] The second sub-rib 13b is connected between the support plate 16 and the second beam side surface 12, which can provide strong support for the second beam side surface 12. The first sub-rib 13a is then connected between the first beam side surface 11 and the support plate 16, which can provide strong support for the support plate 16, thereby improving the deformation resistance of the limiting beam 10 along the first direction X, and further improving the restraining effect of the limiting beam 10 on the expansion deformation of the battery cell 121.

[0119] It can be understood that the first sub-ribs 13a and the second sub-ribs 13b correspond one to one, and each group of corresponding first sub-ribs 13a and second sub-ribs 13b are connected to form a support rib 13 supported between the first beam side surface 11 and the second beam side surface 12.

[0120] In some possible embodiments, as shown in FIG. 9 , the first sub-rib 13 a is arranged parallel to the first direction X, and the second sub-rib 13 b is arranged obliquely relative to the first direction X.

[0121] In this way, when the battery cell 121 generates an expansion deformation force during the cycle, the second sub-rib 13b connected to the second beam side 12 can change the direction of the expansion deformation force obtained in the first direction X and transmit it to the support plate 16, and then the support plate 16 transmits it to the first beam side 11 along the first direction X through the first sub-rib 13a, and then the expansion deformation force can be transmitted to the support beam 20, thereby improving the overall stiffness of the limiting beam 10 in resisting deformation in the first direction X, and effectively avoiding excessive expansion and deformation of the battery cell 121 during the cycle.

[0122] In some possible embodiments, as shown in FIG9 , the support plate 16 includes a first sub-plate 16 a and a second sub-plate 16 b connected to each other. The plate surface of the second sub-plate 16 b is tilted toward the second beam side surface 12 .

[0123] That is to say, there is an angle between the second sub-plate 16b and the second beam side surface 12. In this way, when the battery cell 121 generates an expansion and deformation force during the cycle, the second sub-plate 16b can use the angle to provide stronger support in the first direction X and effectively act on the second beam side surface 12, thereby improving the deformation resistance of the second beam side surface 12 along the first direction X, and ultimately improving the deformation resistance of the limiting beam 10 in the first direction X, so that the overall support strength of the limiting beam 10 is better, and sufficient constraints can be provided to the large surface of the battery cell 121 to prevent it from excessive expansion and deformation.

[0124] In some possible embodiments, the first sub-plate 16a and the second sub-plate 16b are arranged on the same plane, so that the support plate 16 is a whole surface, which is convenient for processing and forming.

[0125] In some other possible embodiments, as shown in FIG9 , the first sub-plate 16a is arranged parallel to the second beam side 12. Because the second sub-plate 16b is arranged at an angle toward the second beam side 12, the first sub-plate 16a and the second sub-plate 16b are arranged on different planes. In this way, the first sub-plate 16a and the second sub-plate 16b form the inner cavity of the limiting beam 10 into an irregular polygonal cavity. This cavity structure improves the overall rigidity of the limiting beam 10, thereby ensuring that the second beam side 12 can transmit the expansion and deformation force of the battery cell 121 during the cycle to the first beam side 11, and then to the support beam 20, effectively preventing excessive expansion and deformation of the battery cell 121 during the cycle.

[0126] In some embodiments, the first sub-plate 16a and the second sub-plate 16b may be integrally connected, thereby better supporting the top surface 14 and the bottom surface 15 of the limiting beam 10 , thereby effectively improving the overall structural strength of the limiting beam 10 .

[0127] In some embodiments, the first sub-plate 16a is arranged parallel to the second beam side surface 12 to facilitate the extrusion integral molding process.

[0128] In some embodiments, as shown in FIG9 , the second sub-plate 16b is parallel to the second section 11b ; the first sub-plate 16a and the second sub-plate 16b have an angle between their surfaces, with the angle ranging from 0 to 20°. For example, the angle between the first sub-plate 16a and the second sub-plate 16b can be, but is not limited to, 1°, 2°, 5°, 7°, 9°, 11°, 14°, 16°, or 20°.

[0129] In some possible embodiments, referring to FIG9 , one end of a first sub-rib 13a is fixedly connected to the connection between the first section 11a and the second section 11b; the other end of the first sub-rib 13a is fixedly connected to the connection between the first sub-plate 16a and the second sub-plate 16b; one end of a second sub-rib 13b is fixedly connected to the connection between the first sub-plate 16a and the second sub-plate 16b, and the other end of the second sub-rib 13b is connected to the second beam side surface 12.

[0130] In this way, the second beam side surface 12 can transmit the expansion and deformation force of the battery cell 121 to the connection between the first sub-plate 16a and the second sub-plate 16b through the second sub-rib 13b, and then transmit the expansion and deformation force from the connection between the first sub-plate 16a and the second sub-plate 16b to the connection between the first section 11a and the second section 11b through the first sub-rib 13a corresponding to the second sub-rib 13b, thereby achieving effective transmission of force, thereby enabling the limiting beam 10 to obtain greater supporting force, which can greatly improve the overall stiffness of the limiting beam 10, and ultimately effectively suppress the excessive expansion and deformation of the battery cell 121 during the cycle.

[0131] In some possible embodiments, referring to FIG. 9 , the position-limiting beam 10 includes a plurality of first sub-ribs 13 a and a plurality of second sub-ribs 13 b .

[0132] Two adjacent first sub-ribs 13a may be spaced apart and arranged parallel to each other, and / or at least two adjacent second sub-ribs 13b may be spaced apart and inclined in opposite directions relative to the first direction X. In this manner, the first sub-ribs 13a connected between the first beam side 11 and the support plate 16 can separate the first sub-cavity 18 into a non-deformable quadrilateral cavity. Similarly, the second sub-ribs 13b supported between the support plate 16 and the second beam side 12 can separate the second sub-cavity 17 into a non-deformable quadrilateral cavity, thereby further improving the overall rigidity of the limiting beam 10. By supporting the second beam side 12 with multiple second sub-ribs 13b, the expansion and deformation force of the battery cells 121 during cycling can be transmitted to the support plate 16, and then transmitted to the first beam side 11 through the multiple first sub-ribs 13a, and finally to the support beam 20, effectively preventing excessive expansion and deformation of the battery cells 121 during cycling.

[0133] In some possible embodiments, as shown in FIG9 , each second sub-rib 13b is connected to the corresponding first sub-rib 13a at the same location on the support plate 16. This ensures a one-to-one correspondence between the first and second sub-ribs 13a, 13b, and the intersection of the first and second sub-ribs 13a, 13b, and the support plate 16 at three points, resulting in greater rigidity and stronger support within the limiting beam 10. This, in turn, improves the limiting beam 10's ability to resist deformation along the first direction X, further enhancing the supporting effect of the limiting beam 10 on the battery cells 121.

[0134] In some possible embodiments, as shown in FIG9 , the second beam side surface 12 includes an upper section 12a, a middle section 12b, and a lower section 12c equally divided along its height. The second sub-reinforcements 13b are connected to the middle section 12b. The number of second sub-reinforcements 13b connected to the middle section 12b is no less than the number of second sub-reinforcements 13b connected to the upper section 12a or the lower section 12c.

[0135] For the battery cell 121 , the expansion generated during the cycle is mainly concentrated in the middle area of ​​the shell 123 , that is, the area corresponding to the middle section 12 b of the second beam side surface 12 .

[0136] Therefore, the number of the second sub-ribs 13b connected to the middle section 12b is set to be relatively large, the number of the second sub-ribs 13b connected to the upper section 12a is set to be relatively small, and the number of the second sub-ribs 13b connected to the lower section 12c is set to be relatively small; one end of the second sub-rib 13b can be centrally connected to the middle section 12b of the second beam side surface 12, and the other end of the second sub-rib 13b is supported on the first sub-plate 16a and the second sub-plate 16b; the expansion and deformation force of the battery cell 121 during the cycle is first transmitted to the second beam side surface 12, and then transmitted through the second sub-rib 13b. It is delivered to the support plate 16 and then transmitted to the first beam side 11 through multiple first sub-ribs 13a corresponding to the second sub-ribs 13b, and finally the expansion and deformation force is transmitted to the support beam 20, so as to form a stronger support for the battery cell 121, improve the overall rigidity of the limiting beam 10, and effectively avoid excessive expansion and deformation of the battery cell 121 during the cycle; in addition, it can ensure the overall rigidity of the limiting beam 10 and avoid overweight caused by setting too many support ribs 13, ensuring that the limiting beam 10 can obtain a relatively better support effect while optimizing the weight of the support ribs, thereby improving the energy density of the battery.

[0137] It is understandable that, in the embodiment of the present application, the second beam side surface 12 is equal to the height of the battery cell 121 , and the middle section 12 b is configured to abut against the middle region of the battery cell 121 .

[0138] In some possible embodiments, as shown in Figure 9, one end of all the second sub-ribs 13b is connected to the middle section 12b; and the other ends of all the second sub-ribs 13b are dispersedly supported at intervals on the first sub-plate 16a and / or the second sub-plate 16b of the support plate 16; thereby obtaining a relatively better support effect when the weight of the limiting beam 10 is constant; it can ensure the overall stiffness of the limiting beam 10, and avoid overweight caused by setting too many second sub-ribs 13b, thereby improving the energy density of the battery.

[0139] In some possible embodiments, referring to FIG. 5 to FIG. 9 , the limiting beam 10 extends along the second direction Y, wherein the first direction X and the second direction Y intersect with each other; typically, the first direction X and the second direction Y are perpendicular.

[0140] The limiting beam 10 includes multiple support beams 20 , all of which are spaced apart along the second direction Y and connected to the first beam side surface 11 along the first direction X. Thus, each limiting beam 10 corresponds to multiple support beams 20 , thereby distributing the expansion and deformation force transmitted from the limiting beam 10 to the box body 112 .

[0141] In some possible embodiments, as shown in Figures 5 to 9 , the expansion of the battery cells 121 during cycling is primarily concentrated in the central region of the housing 123. Therefore, to better offset the expansion and deformation forces of the battery cells 121 during cycling, the support beams 20 can be aligned with the central region of the battery cells 121. This allows the expansion and deformation forces to be directly transmitted to the support beams 20 via the limiting beams 10, improving the overall stiffness of the limiting beams 10 and effectively suppressing excessive expansion and deformation of the battery cells 121 during cycling.

[0142] In some embodiments, two limiting beams 10 are arranged relatively spaced apart on both sides of the box body 112 along the first direction X. The area between the two limiting beams 10 and the bottom of the box body 112 together form a receiving space, that is, an energy zone, for placing the battery cell 121.

[0143] The plane where the large surface of the battery cell 121 lies should be perpendicular to the first direction X, and multiple battery cells 121 are stacked along the first direction X. In this way, the two limiting beams 10 respectively prevent the battery cells 121 from excessive expansion and deformation during cycling from both ends of the first direction X.

[0144] A second aspect of the embodiments of the present application provides an electric device 1000. The electric device 1000 includes the aforementioned battery 100, and the battery 100 is used to provide electric energy to the electric device 1000.

[0145] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0146] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A battery comprising a battery cell (121) and a housing (110); The box body (110) includes a box body (112) and a limiting beam (10); the limiting beam (10) is arranged in the box body (112) to define a receiving space; the battery cell (121) is arranged in the receiving space; The limiting beam (10) comprises a first beam side surface (11) and a second beam side surface (12) arranged opposite to each other along a first direction (X); in, The second beam side surface (12) is configured as a vertical plane abutting against the large surface of the battery cell, the large surface being the side surface with the largest surface area in the battery cell, and at least part of the first beam side surface (11) is tilted toward the second beam side surface (12).

2. The battery according to claim 1, wherein The first beam side surface (11) comprises a first section (11a) and a second section (11b) connected to each other, and the second section (11b) is inclined toward the second beam side surface (12); The first section (11a) and the second section (11b) are arranged in the same plane; or the first section (11a) and the second beam side surface (12) are arranged in parallel.

3. The battery according to claim 2, wherein The second beam side surface (12) and the second section (11b) have an included angle A of 0° <A≤20°。 4. The battery according to claim 2 or 3, wherein The battery further comprises at least one supporting beam (20), one end of the supporting beam (20) being connected to the first beam side surface (11) along the first direction (X).

5. The battery according to claim 4, wherein The limiting beam (10) extends along a second direction (Y), and the first direction (X) and the second direction (Y) are arranged to intersect; The battery comprises a plurality of support beams (20), which are arranged at intervals along the second direction (Y) and are respectively connected to the first beam side surfaces (11) along the first direction (X).

6. The battery according to claim 4 or 5, wherein One end of the support beam (20) is connected to the first section (11a) along the first direction (X).

7. The battery according to any one of claims 2 to 6, wherein The position-limiting beam (10) comprises at least one supporting rib (13), and the supporting rib (13) is connected between the first beam side surface (11) and the second beam side surface (12).

8. The battery according to claim 7, wherein The supporting ribs (13) are arranged obliquely relative to the first direction (X).

9. The battery according to claim 8, wherein The limiting beam (10) comprises a plurality of support ribs (13), and at least two adjacent support ribs (13) are spaced apart from each other and have opposite inclination directions relative to the first direction (X).

10. The battery according to any one of claims 7 to 9, wherein One end of at least one of the supporting ribs (13) away from the second beam side surface (12) is fixedly connected to the connection between the first section (11a) and the second section (11b).

11. The battery according to any one of claims 7 to 9, wherein The second beam side surface (12) comprises an upper section (12a), a middle section (12b) and a lower section (12c) equally divided along its height direction; The number of the supporting ribs (13) connected to the middle section (12b) is not less than the number of the supporting ribs (13) connected to the upper section (12a) or the lower section (12c).

12. The battery according to claim 11, wherein One end of all the supporting ribs (13) is connected to the middle section (12b).

13. The battery according to any one of claims 2 to 12, wherein The limiting beam (10) further includes a top surface (14) and a bottom surface (15); The top surface (14) and the bottom surface (15) are respectively connected to the two ends of the first beam side surface (11) and the second beam side surface (12) to enclose an internal cavity of the limiting beam (10).

14. The battery according to claim 13, wherein The limiting beam (10) includes a support plate (16); The support plate (16) is connected between the top surface (14) and the bottom surface (15) to separate the inner cavity of the limiting beam (10) into a first sub-cavity (18) and a second sub-cavity (17).

15. The battery according to claim 14, wherein The limiting beam (10) comprises at least one first sub-rib (13a) and at least one second sub-rib (13b); the first sub-rib (13a) is connected between the first beam side surface (11) and the support plate (16); and the second sub-rib (13b) is connected between the support plate (16) and the second beam side surface (12).

16. The battery according to claim 15, wherein The support plate (16) comprises a first sub-plate (16a) and a second sub-plate (16b) connected to each other, and the second sub-plate (16b) is arranged to be inclined toward the side surface (12) of the second beam; The first sub-plate (16a) and the second sub-plate (16b) are arranged coplanarly; or, the first sub-plate (16a) and the second beam side surface (12) are arranged parallel to each other.

17. The battery according to claim 16, wherein One end of one of the first sub-ribs (13a) is fixedly connected to the connection between the first section (11a) and the second section (11b); and the other end of the first sub-rib (13a) is fixedly connected to the connection between the first sub-plate (16a) and the second sub-plate (16b); One end of one of the second sub-ribs (13b) is fixedly connected to the connection between the first sub-plate (16a) and the second sub-plate (16b), and the other end of the second sub-rib (13b) is connected to the second beam side surface (12).

18. The battery according to any one of claims 15 to 17, wherein The first sub-rib (13a) is arranged parallel to the first direction (X), and the second sub-rib (13b) is arranged obliquely relative to the first direction (X).

19. The battery according to any one of claims 15 to 18, wherein The limiting beam (10) comprises a plurality of the first sub-ribs (13a) and a plurality of the second sub-ribs (13b); Two adjacent first sub-ribs (13a) are spaced apart from each other and arranged in parallel; and / or, At least two adjacent second sub-ribs (13b) are spaced apart from each other and have opposite inclination directions relative to the first direction (X).

20. The battery according to any one of claims 15 to 19, wherein At least one of the second sub-ribs (13b) and the corresponding first sub-rib (13a) are connected to the same position of the support plate (16).

21. The battery according to any one of claims 15 to 20, wherein The second beam side surface (12) comprises an upper section (12a), a middle section (12b) and a lower section (12c) equally divided along its height direction; The number of the second sub-ribs (13b) connected to the middle section (12b) is not less than the number of the second sub-ribs (13b) connected to the upper section (12a) or the lower section (12c).

22. The battery according to claim 21, wherein All of the second sub-ribs (13b) are connected to the middle section (12b).

23. An electrical device, wherein: The battery according to any one of claims 1 to 22 is used to provide electrical energy.

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