Battery and electric device

Abstract

The utility model relates to a battery and a power utilization device. The battery comprises a battery monomer 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 an accommodating space; the battery monomers are arranged in the accommodating space; the limiting beam comprises a first beam side face and a second beam side face which are oppositely arranged in the first direction. Wherein the second beam side face is configured to be a vertical plane abutting against the large face of the battery single body, the large face is the side face with the largest surface area in the battery single body, and at least part of the first beam side face is obliquely arranged towards the second beam side face. The battery and the electric device provided by the embodiment of the utility model have the advantage of good strength.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] During the battery cycle process, 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. Utility Model Content

[0004] 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.

[0005] 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 a large surface of the battery cell, the large surface being a side surface with the largest surface area in the battery cell, and at least a portion of the first beam side surface is inclined toward the second beam side surface.

[0006] 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 finally 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.

[0007] In one embodiment, the first beam side surface includes a first section and a second section connected to each other, and the second section is inclined toward the second beam side surface. In this way, the second beam side surface transmits the expansion and deformation force of the battery cell during the cycle to the first beam side surface, and the second section is inclined toward the second beam side surface, thereby improving the anti-deformation ability of the limit beam in the first direction, and avoiding excessive expansion and deformation of the battery cell during the cycle process, which leads to battery function failure.

[0008] In one embodiment, the first section and the second section are arranged in the same plane; or, the first section is arranged parallel to the side surface of the second beam. In this way, the first section and the side surface of the second beam are both vertical planes, so that the end of the supporting beam abutting against the first section can be processed into a vertical plane instead of an inclined plane, which is conducive to the fixation of the two in the first direction.

[0009] In one embodiment, the side surface of the second beam and the second section have an angle A, 0°<A≤20°. Thus, during the cycle of the battery cell, if the expansion amount is small, the angle value between the side surface of the second beam and the second section can be appropriately reduced to free up a larger energy area for placing the battery cell; if the expansion amount is large, the angle between the side surface of the second beam and the second section can be increased to obtain a better support effect.

[0010] In one embodiment, the battery further comprises at least one support beam, one end of which is connected to the side surface of the first beam along the first direction. By abutting the side surface of the first beam along the first direction with one end of the support beam, the angle of the side surface of the first beam can form a 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, so that the overall support strength of the limit beam is good, thereby providing sufficient constraints to the large surface of the battery cell to prevent expansion and deformation.

[0011] In one embodiment, the limiting beam extends along the second direction, and the first direction and the second direction are arranged to intersect each other; the battery includes a plurality of the supporting beams, and the plurality of the supporting beams are arranged at intervals along the second direction and are respectively connected to the side surfaces of the first beam along the first direction. In this way, each limiting beam corresponds to a plurality of supporting beams, so that the expansion deformation force transmitted by the limiting beam is dispersed to the box body.

[0012] In one embodiment, one end of the support beam is connected to the first section along the first direction. In this way, the second section is inclined toward the side of the second beam, and one end of the support beam abuts against the first section along the first direction; the expansion and deformation force of the battery cell during the cycle is transmitted to the side of the first beam through the side of the second beam, and the first section abuts against the support beam to transmit the above force to the support beam, thereby avoiding excessive expansion and deformation of the battery cell during the cycle, which may lead to battery failure.

[0013] In one embodiment, the limiting beam includes at least one supporting rib, and the supporting rib is connected between the first beam side surface and the second beam side surface. In this way, the supporting rib can provide strong support for the second beam side surface, thereby improving the deformation resistance of the second beam side surface along the first direction, and further improving the supporting effect of the limiting beam on the battery cell.

[0014] In one embodiment, the support ribs are arranged obliquely relative to the first direction. Thus, when the battery cell generates expansion deformation force during the cycle, the support ribs connected to the side of the second beam can transfer the expansion deformation force obtained in the first direction to the side of the first beam after changing the direction, and then to the support beam, thereby improving the overall rigidity of the limit beam in resisting deformation in the first direction, and effectively avoiding excessive expansion deformation of the battery cell during the cycle.

[0015] In one embodiment, the limit beam includes a plurality of support ribs, and at least two adjacent support ribs are spaced apart from each other and have opposite inclination directions relative to the first direction. In this way, the plurality of support ribs supported between the first beam side surface and the second beam side surface can separate the inner cavity of the limit beam into a non-quadrilateral cavity that is not easily deformed, further improving the overall rigidity of the limit beam, thereby ensuring that the second beam side surface can transfer the expansion and deformation force of the battery cell during the cycle process to the first beam side surface, and then to the support beam, effectively avoiding excessive expansion and deformation of the battery cell during the cycle process.

[0016] In one embodiment, at least one end of the support rib away from the side of the second beam is fixedly connected to the connection between the first section and the second section. In this way, the side of the second beam can transfer the expansion and deformation force of the battery cell to the connection between the first section and the second section through the support rib, thereby obtaining a greater support force, and further improving the overall rigidity of the limit beam.

[0017] 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 the support ribs connected to the middle section is not less than the number of the support ribs connected to the upper section or the lower section. In this way, the support ribs are concentratedly connected to the middle section of the side surface of the second beam, which can better support the side surface of the second beam, thereby improving the overall rigidity of the limit beam, thereby effectively suppressing excessive expansion and deformation of the battery cell during the cycle process.

[0018] In one embodiment, one end of all the support ribs is connected to the middle section. In this way, a relatively better support effect can be obtained under a certain weight, which can ensure the overall rigidity of the limit beam and avoid overweight caused by too many support ribs, thereby improving the energy density of the battery.

[0019] 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.

[0020] In one embodiment, the limit beam includes a support plate; the support plate is connected between the top surface and the bottom surface to separate the internal cavity of the limit beam into a first sub-cavity and a second sub-cavity. In this way, the limit beam is formed into a three-dimensional structure with multiple cavities through the support plate, which is conducive to improving the overall rigidity of the limit beam, thereby ensuring that the side surface of the second beam can transfer the expansion and deformation force of the battery cell during the cycle to the side surface of the first beam, and then to the support beam, effectively avoiding excessive expansion and deformation of the battery cell during the cycle.

[0021] In one embodiment, the limit beam includes at least one first sub-rib and at least one second sub-rib; the first sub-rib is connected between the side surface of the first beam and the support plate; the second sub-rib is connected between the support plate and the side surface of the second beam. In this way, the second sub-rib is connected between the support plate and the side surface of the second beam, which can form a strong support for the side surface of the second beam. The first sub-rib is then connected between the side surface of the first beam and the support plate, and can form a strong support for the support plate, thereby improving the anti-deformation ability of the limit beam along the first direction, and further improving the restraining effect of the limit beam on the expansion and deformation of the battery cell.

[0022] In one embodiment, the support plate includes a first sub-plate and a second sub-plate connected to each other, the second sub-plate is tilted toward the side of the second beam; the first sub-plate and the second sub-plate are coplanar; or the first sub-plate and the side of the second beam are parallel. In this way, the inner cavity of the limit beam is formed into an irregular polygonal cavity by the first sub-plate and the second sub-plate, and the overall rigidity of the limit beam is improved by the cavity structure, so as to ensure that the side of the second beam can transfer the expansion and deformation force of the battery cell during the cycle to the side of the first beam, and then to the support beam, effectively avoiding excessive expansion and deformation of the battery cell during the cycle.

[0023] In one embodiment, one end of one of the first sub-ribs is fixedly connected to the connection between the first section and the second section; the other end of the first sub-rib is fixedly connected to the connection between the first sub-plate and the second sub-plate; one end of one of the second sub-ribs is fixedly connected to the connection between 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. In this way, effective transmission of the force can be achieved, thereby enabling the limit beam to obtain greater support force, improving the overall rigidity of the limit beam, and ultimately effectively suppressing excessive expansion and deformation of the battery cell during the cycle.

[0024] 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. In this way, when the battery cell generates expansion deformation force during the cycle, the second sub-rib connected to the side of the second beam can change the direction of the expansion deformation force obtained in the first direction and transmit it to the support plate, which is then transmitted to the side of the first beam by the support plate through the first sub-rib along the first direction, and then the expansion deformation force can be transmitted to the support beam, thereby improving the overall stiffness of the limit beam in resisting deformation in the first direction, and effectively avoiding excessive expansion deformation of the battery cell during the cycle.

[0025] In one embodiment, the limiting beam includes a plurality of the first sub-ribs and a plurality of the second sub-ribs; two adjacent first sub-ribs are spaced apart and arranged in parallel; 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 quadrilateral cavity that is not easily deformed, 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 quadrilateral cavity that is not easily deformed, thereby further improving the overall stiffness of the limiting beam and effectively preventing the battery cell from excessive expansion and deformation during the cycle.

[0026] In one embodiment, each of the second sub-ribs is connected to the same area of ​​the support plate as the corresponding first sub-rib. In this way, the first sub-ribs and the second sub-ribs correspond to each other one by one; and the first sub-ribs, the second sub-ribs and the support plate intersect at three points, which can obtain better rigidity, thereby forming a stronger support inside the limit beam, thereby improving the anti-deformation ability of the limit beam along the first direction, and finally effectively improving the support effect of the limit beam on the battery cell.

[0027] 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 the second sub-ribs connected to the middle section is not less than the number of the second sub-ribs connected to the upper section or the lower section.

[0028] 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, 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 limiting beam and effectively avoiding excessive expansion and deformation of the battery cell during the cycle.

[0029] In one embodiment, all the second sub-ribs are connected to the middle section. In this way, a relatively better supporting effect can be obtained when the weight of the limit beam is constant; the overall rigidity of the limit beam can be ensured, and overweight caused by too many second sub-ribs can be avoided, thereby improving the energy density of the battery.

[0030] 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.

[0031] 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

[0032] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0033] Figure 2 Schematic diagram of the exploded structure of a battery provided in some embodiments of the present application.

[0034] Figure 3 A schematic diagram of the structure of a battery module provided in some embodiments of the present application.

[0035] Figure 4 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application.

[0036] Figure 5 Schematic diagram of the assembly of the box and battery cells provided in some embodiments of the present application.

[0037] Figure 6 This is a schematic diagram of the assembly of a box and a battery cell from a top view provided in some embodiments of the present application.

[0038] Figure 7 for Figure 6 BB cross-sectional view of the structure shown.

[0039] Figure 8 A schematic diagram of the partial structure of the assembly of a box and a battery cell provided in some other embodiments of the present application.

[0040] Fig. 9 A schematic diagram of the partial structure of the assembly of a box body and a battery cell provided in some further embodiments of the present application.

[0041] In the figure, the direction indicated by X is the first direction, and the direction indicated by Y is the second direction.

[0042] Description of reference numerals:

[0043] Vehicles - 1000;

[0044] Battery 100, box 110, box cover 111, box body 112, battery module 120, battery cell 121, end cap 122, housing 123, electrode assembly 124, electrode terminal 125, controller 200, motor 300;

[0045] Limiting 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. DETAILED DESCRIPTION

[0046] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0048] In the description of the embodiments of the present application, if the technical terms "first", "second", etc. 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.

[0049] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0051] In the description of the embodiments of the present application, if the term "multiple" appears, "multiple" means at least two (including two), such as two, three, etc., unless otherwise clearly and specifically defined. Similarly, if the term "multiple groups" appears, "multiple groups" refers to more than two groups (including two groups), and if the term "multiple sheets" appears, "multiple sheets" refers to more than two sheets (including two sheets).

[0052] 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 referred device or element 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.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if the technical terms "installed", "connected", "connected", "fixed" and the like 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.

[0054] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it 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. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0055] 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 a central 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 a central element at the same time. 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 implementation method.

[0056] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0057] In the related art, the beam structure of the battery is usually formed by a frame with a cavity. The cavity can not only reduce the weight of the beam structure, but also make the beam structure have a certain energy absorption capacity, thereby reducing the deformation of the beam structure when 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, thereby affecting the overall structural strength and rigidity of the beam structure.

[0058] Based on the above considerations, a limiting beam can be set in the box to define a storage space for accommodating the battery cell. The limiting beam includes a first beam side and a second beam side that are arranged opposite to each other; wherein the second beam side is configured as a vertical plane for contacting the large surface of the battery cell, and at least part of the first beam side is inclined toward the second beam side. In this way, by setting the first beam side to be inclined toward the second beam side to form an angle, when the battery cell generates an expansion deformation force during the cycle, the first beam side can use the angle formed by the inclination to make the second beam side have strong support in a specific direction, thereby improving the deformation resistance of the second beam side in a specific direction, and finally improving the deformation resistance of the limiting beam in a 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.

[0059] The embodiments of the present application provide a battery and an electric device, which may be, but not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, 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., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0060] 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 a box 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.

[0061] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may 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 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and 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.

[0062] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.

[0063] Figure 2 An exploded view of a battery 100 provided for some embodiments of the present application; Figure 3 This is a schematic diagram of the structure of the battery module provided in some embodiments of the present application. Figure 2 and Figure 3 In order to meet different power requirements, the battery 100 may include a plurality of battery cells 121 and a housing 110. The battery cell 121 refers to the smallest unit constituting the battery module 120 or the battery pack. The plurality of battery cells 121 may be connected in series and / or in parallel via electrode terminals for various applications.

[0064] The box body 110 can adopt a variety of structures. In some embodiments, the box body 110 can include a box cover 111 and a box body 112, the box cover 111 and the box body 112 cover each other, and the box cover 111 and the box body 112 jointly define a storage space for accommodating the battery cell 121. The box body 112 can be a hollow structure with one end open, and the box cover 111 can be a plate-like structure. The box cover 111 covers the open side of the box body 112, so that the box cover 111 and the box body 112 jointly define a storage space; the box cover 111 and the box body 112 can also be hollow structures with one side open, and the open side of the box cover 111 covers the open side of the box body 112. Of course, the box body 110 formed by the box cover 111 and the box body 112 can be in a variety of shapes, such as a simple three-dimensional structure such as a single cuboid or a cylinder or a sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as a cuboid or a cylinder or a sphere, which is not limited in the embodiments of the present application. 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, etc., or a composite material such as glass fiber and epoxy resin, and the implementation mode of the present application is not limited to this.

[0065] In the embodiment of the present application, multiple battery cells 121 can directly form a battery pack, or they can first form a battery module 120, and then the battery module 120 can form a battery pack. Specifically, multiple battery cells 121 can be directly connected in series, parallel or mixed together to form a whole, and then the whole formed by multiple battery cells 121 is accommodated in the box 110. Alternatively, multiple battery cells 121 can first be connected in series, parallel or mixed together to form a battery module 120, and then multiple battery modules 120 can be connected in series, parallel or mixed together to form a whole, and then accommodated in the box 110.

[0066] 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 .

[0067] 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 it is not limited thereto. The battery cell 121 can be cylindrical, flat, rectangular or other shapes. The battery cells 121 are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the implementation method of the present application is not limited to this. However, for the sake of simplicity, the following embodiments are all described by taking the square lithium-ion battery cell 121 as an example.

[0068] Please refer to Figure 4 , Figure 4The schematic diagram of the exploded structure of the 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.

[0069] The end cap 122 refers to a component that covers the opening of the shell 123 to isolate the internal environment of the electrode assembly 124 from the external environment. Without limitation, the shape of the end cap 122 can be adapted to the shape of the shell 123 to match the shell 123. Optionally, the end cap 122 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 122 is not easily deformed when it is squeezed and collided, so that the battery cell 121 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 125 can be provided on the end cap 122. The electrode terminal 125 can be used to electrically connect to the electrode assembly 124 for outputting or inputting electrical energy of the battery cell 121. In some embodiments, the end cap 122 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 121 reaches a threshold. The material of the end cap 122 can also be a variety of 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. 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. For example, the insulating member may be plastic, rubber, or the like.

[0070] 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, the electrolyte and other components. The shell 123 and the end cap 122 can be independent components, and 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 at the opening. 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 put into the shell, and when it is necessary to encapsulate the interior of the shell 123, the end cap 122 covers 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 a variety of 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.

[0071] The electrode assembly 124 is a component in the battery cell 121 where an electrochemical reaction occurs. 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 pole ear (not shown). The positive pole ear and the negative pole ear 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 pole ear connects the electrode terminal 125 to form a current loop.

[0072] Figure 5 A schematic diagram of the assembly of a box and a battery cell provided in some embodiments of the present application; Figure 6 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; Figure 7 for Figure 6 BB section view of the structure shown; Figure 8 A schematic diagram of a partial structure of the assembly of a box and a battery cell provided in some other embodiments of the present application; Fig. 9 A schematic diagram of the partial structure of the assembly of a box body and a battery cell provided in some further embodiments of the present application.

[0073] See also Figures 1 to 9 As shown, a first aspect of the present application provides a battery 100 .

[0074] The battery 100 includes a battery cell 121 and a box 110. The box 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 for receiving the battery cell 121, that is, an energy zone. The battery cell 121 is arranged in the receiving space.

[0075] Specifically, the limiting beam 10 is used to be placed in the box 110 as the side wall of the energy zone, and 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 to avoid free deformation.

[0076] The limiting beam 10 includes a first beam side surface 11 and a second beam side surface 12 which are arranged opposite to each other along a first direction X; wherein the second beam side surface 12 is configured as a vertical plane for contacting with 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 surface of the battery cell 121 with the largest surface area.

[0077] Combination Figure 5-9 In each embodiment of the present application, the battery cell 121 is arranged on one side of the limiting beam 10 along the first direction X.

[0078] 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.

[0079] At least part of the first beam side surface 11 is inclined toward the second beam side surface 12. In this way, when the battery cell 121 generates an expansion deformation force during the cycle, the first beam side surface 11 can use the angle formed by the inclination to make the second beam side surface 12 have stronger support in the first direction X, thereby improving the deformation resistance of the second beam side surface 12 along the first direction X, and finally 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 good, and sufficient constraints are provided to the large surface of the battery cell 121 to prevent it from excessive expansion and deformation; further, after the limiting beam 10 has a higher rigidity, it can also avoid the problem of overweight caused by continuously increasing the wall thickness of the limiting beam 10, and finally effectively improve the overall energy density of the battery.

[0080] Optionally, the second beam side surface 12 and the first beam side surface 11 have an angle A, 0°<A≤20°. As an example, the 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.

[0081] Optionally, see Figures 1 to 9 As shown, the limiting beam 10 also 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 the internal cavity of the limiting beam 10. Among them, 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, so as to define a complete inner cavity. The integral connection process can reduce the connection weak points between the various surfaces of the limiting beam 10, which 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.

[0082] The cavity inside the limiting beam 10 can provide a deformation space for the limiting beam 10 to absorb energy, and can reduce the overall weight of the limiting beam 10, which is beneficial to improving the energy density of the battery.

[0083] The limiting beam 10 can be a hollow beam structure formed by a plate or a rod through stamping / extrusion or metal casting. The wall thickness of the limiting beam 10 can be 1mm-8mm according to actual needs, and 3mm-5mm is more common. With this wall thickness, the limiting beam 10 has a good cost performance, and can have a light weight and good structural strength, and can effectively suppress the expansion deformation of the battery cell 121 during the cycle.

[0084] The limiting beam 10 can be made of, but is not limited to, steel, iron, aluminum, and aluminum alloy.

[0085] In some possible embodiments, see Figure 8 As shown, 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 .

[0086] 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, avoiding excessive expansion and deformation of the battery cell 121 during the cycle, resulting in battery function failure.

[0087] Optionally, the first section 11 a and the second section 11 b are integrally connected, so as to form support for the wall of the limiting beam 10 , and can effectively improve the overall structural strength of the limiting beam 10 .

[0088] In some possible embodiments, see Figures 5 to 9 As shown, 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.

[0089] The limiting beam 10 resists the expansion and deformation force of the battery cell 121 of the battery 100 during the cycle process in the first direction X. The force is transmitted between the first beam side surface 11 and the second beam side surface 12. One end of the support beam 20 abuts against the first beam side surface 11 along the first direction X, so that 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.

[0090] Optionally, the support beam 20 is a hollow beam body with 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.

[0091] The support beam 20 and the box body 112 can be welded, bolted or clamped. With one end of the support beam 20 abutting against the first beam side 11 along the first direction X, the force of the expansion and deformation of the battery cell 121 during the cycle acts on the second beam side 12 of the limiting beam 10, and then is transmitted from the first beam side 11 to the support beam 20, and finally acts on the box body 112, so as to avoid excessive expansion and deformation of the battery cell 121 during the cycle, resulting in failure of the battery function.

[0092] Optionally, the support beam 20 may be a plate or a hollow beam structure. The support beam 20 may be made of, but not limited to, steel, iron, aluminum, aluminum alloy, and other materials.

[0093] In some possible embodiments, one end of the support beam 20 is connected to the first section 11 a along the first direction.

[0094] 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 and causing battery function failure.

[0095] In some possible embodiments, see Figure 7 As shown, the first section 11a and the second section 11b are arranged coplanarly. In this way, the first beam side surface 11 is a whole surface, which is convenient for processing and forming.

[0096] In some other possible embodiments, see Figure 8 and Fig. 9 As shown, the first section 11a is arranged parallel to the second beam side 12. In this way, the first section 11a and the second beam side 12 are both vertical planes. The end of the support beam 20 connected to the first section 11a can be processed into a vertical plane instead of an inclined plane, which is conducive to the fixation of the two in the first direction X.

[0097] In some possible embodiments, see Figures 1 to 9As shown, the second beam side surface 12 and the second section 11b have an angle A, 0°<A≤20°. As an example, the angle A between the second beam side surface 12 and the second section 11b can be, but not limited to, 1°, 3°, 5°, 6°, 8°, 10°, 14°, 17°, 20°, etc. During the cycle of the battery cell 121, if the expansion amount is small, the angle A between the second beam side surface 12 and the second section 11b can be appropriately reduced, and the minimum angle can be 1°, thereby freeing up a larger energy area to place the battery cell 121; if the expansion amount 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 (mentioned below) can be adjusted to obtain a better support effect.

[0098] It can be understood that since the second section 11b is inclined toward the second beam side 12, an angle is also formed 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 limit beam 10 in the first direction X, and then giving the limit beam 10 a stronger support stiffness to provide sufficient constraints to the large surface of the battery cell 121.

[0099] In some possible embodiments, see Figures 1 to 8 As shown, the 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 .

[0100] Combination Figure 5-7 In the embodiment of the present application, the battery cell 121 is arranged on one side of the limiting beam 10 along the first direction X.

[0101] The expansion deformation of the battery cell 121 during operation will exert a force on the limiting beam 10, and the component of the force along the first direction X is relatively large, so the second beam side surface 12 of the limiting beam 10 bears a relatively large force along the first direction X. The support rib 13 is connected between the first beam side surface 11 and the second beam side surface 12, and can form a relatively 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, and further improving the supporting effect of the limiting beam 10 on the battery cell 121.

[0102] Optionally, the number of the supporting ribs 13 may be but is not limited to one, two, three or more.

[0103] Optionally, the support rib 13 may be made of, but not limited to, steel, iron, aluminum, aluminum alloy, etc. The support rib 13 may be formed integrally with the limiting beam 10, or the support rib 13 may be fixed between the first beam side surface 11 and the second beam side surface 12 by welding, threaded connection, etc., which is not limited in the present application.

[0104] In some possible embodiments, see Figure 7 and Figure 8 As shown, the support ribs 13 are arranged to be inclined relative to the first direction X.

[0105] In this way, when the battery cell 121 generates expansion deformation force during the cycle, the support rib 13 connected to the second beam side 12 can change the direction of the expansion 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.

[0106] In some possible embodiments, see Figure 7 and Figure 8 As shown, the limiting beam 10 includes a plurality of supporting ribs 13, at least two adjacent supporting ribs 13 are arranged at intervals from each other, and are inclined in opposite directions relative to the first direction X. Specifically, the plurality of supporting 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 not easily deformed, further improving the overall rigidity of the limiting beam 10, thereby ensuring that the second beam side surface 12 can transmit the expansion deformation force of the battery cell 121 during the cycle process to the first beam side surface 11, and then to the supporting beam 20, effectively avoiding excessive expansion and deformation of the battery cell 121 during the cycle process.

[0107] In some possible embodiments, see Figures 1 to 8 As shown, at least one end of the support rib 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. 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 connection between the first section 11a and the second section 11b; in this way, the second beam side surface 12 can transfer the expansion deformation force of the battery cell 121 to the connection between the first section 11a and the second section 11b through the support rib 13, thereby obtaining a greater support force, and further improving the overall rigidity of the limiting beam 10.

[0108] 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.

[0109] 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 avoid 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.

[0110] Therefore, through the above-mentioned setting, more support ribs 13 are concentratedly connected to the middle section 12b of the second beam side 12, which can better support the second beam side 12 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.

[0111] It can be understood 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 area of ​​the battery cell 121 .

[0112] 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, a relatively better supporting effect can be obtained under a certain weight; the overall stiffness of the limiting beam 10 can be ensured, and overweight caused by setting too many support ribs 13 can be avoided, thereby improving the energy density of the battery.

[0113] In some possible embodiments, see Fig. 9 As shown, 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 internal cavity of the limiting beam 10 into a first sub-cavity 18 and a second sub-cavity 17. In this way, the limiting beam 10 is formed into a three-dimensional structure with multiple cavities by the support plate 16, which is conducive to improving the overall rigidity of the limiting beam 10, thereby ensuring that the second beam side 12 can transfer the expansion deformation force of the battery cell 121 during the cycle process to the first beam side 11, and then to the support beam 20, effectively avoiding excessive expansion and deformation of the battery cell 121 during the cycle process.

[0114] Combination Fig. 9As shown, the extension direction of the support plate 16 can be set 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, rhombus or other irregular polygons.

[0115] In some possible embodiments, see Fig. 9 As shown, the 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 arranged in the first sub-cavity 18, and the first sub-rib 13a is connected between the first beam side surface 11 and the support plate 16; the second sub-rib 13b is arranged in the second sub-cavity 17, and the second sub-rib 13b is connected between the support plate 16 and the second beam side surface 12.

[0116] The second sub-rib 13b is connected between the support plate 16 and the second beam side 12, and can provide strong support for the second beam side 12. The first sub-rib 13a is then connected between the first beam side 11 and the support plate 16, and 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.

[0117] It can be understood that the first sub-ribs 13 a and the second sub-ribs 13 b correspond one to one, and each group of corresponding first sub-ribs 13 a and second sub-ribs 13 b are connected to form a support rib 13 supported between the first beam side surface 11 and the second beam side surface 12 .

[0118] In some possible embodiments, see Fig. 9 As shown, 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.

[0119] 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 transfer 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.

[0120] In some possible embodiments, see Fig. 9As shown, the support plate 16 includes a first sub-plate 16a and a second sub-plate 16b connected to each other. The plate surface of the second sub-plate 16b is inclined toward the second beam side surface 12.

[0121] 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 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.

[0122] In some possible embodiments, the first sub-plate 16a and the second sub-plate 16b are arranged on the same plane. In this way, the support plate 16 is a whole surface, which is convenient for processing and forming.

[0123] In some other possible embodiments, see Fig. 9 As shown, the first sub-plate 16a is arranged parallel to the second beam side 12. Since the second sub-plate 16b is arranged obliquely 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 inner cavity of the limiting beam 10 is formed into an irregular polygonal cavity by the first sub-plate 16a and the second sub-plate 16b, and the overall rigidity of the limiting beam 10 is improved by the cavity structure, thereby ensuring that the second beam side 12 can transmit the expansion deformation force of the battery cell 121 during the cycle process to the first beam side 11, and then to the support beam 20, effectively avoiding excessive expansion and deformation of the battery cell 121 during the cycle process.

[0124] Optionally, the first sub-plate 16 a and the second sub-plate 16 b may be integrally connected, so as to better support 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 .

[0125] Optionally, the first sub-plate 16a is arranged parallel to the second beam side surface 12 to facilitate the extrusion one-piece molding process.

[0126] Optionally, see Fig. 9 As shown, the second sub-plate 16b is parallel to the second section 11b; the plate surfaces of the first sub-plate 16a and the second sub-plate 16b have an angle, and the angle range is 0-20°. As an 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°, 20°, etc.

[0127] In some possible embodiments, see Fig. 9 As shown, 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 12.

[0128] In this way, the second beam side surface 12 can transfer the expansion 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 transfer the expansion 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 the force, thereby enabling the limiting beam 10 to obtain a 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.

[0129] In some possible embodiments, see Fig. 9 As shown, the limiting beam 10 includes a plurality of first sub-ribs 13a and a plurality of second sub-ribs 13b.

[0130] Among them, two adjacent first sub-ribs 13a can be spaced apart and arranged in parallel, and / or at least two adjacent second sub-ribs 13b can be spaced apart and arranged in opposite directions relative to the first direction X. In this way, the first sub-rib 13a connected between the first beam side 11 and the support plate 16 can separate the first sub-cavity 18 into a quadrilateral cavity that is not easily deformed. Similarly, the second sub-rib 13b supported between the support plate 16 and the second beam side 12 can separate the second sub-cavity 17 into a quadrilateral cavity that is not easily deformed, 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 cell 121 during the cycle process can be transmitted to the support plate 16, and then transmitted to the first beam side 11 through multiple first sub-ribs 13a, and then transmitted to the support beam 20, effectively avoiding excessive expansion and deformation of the battery cell 121 during the cycle process.

[0131] In some possible embodiments, see Fig. 9As shown, each second sub-rib 13b is connected to the same position of the support plate 16 with the corresponding first sub-rib 13a. In this way, the first sub-rib 13a and the second sub-rib 13b correspond to each other one by one; and the first sub-rib 13a, the second sub-rib 13b and the support plate 16 intersect at three points, which can obtain better rigidity, thereby forming a stronger support inside the limiting beam 10, thereby improving the anti-deformation ability of the limiting beam 10 along the first direction X, and further improving the supporting effect of the limiting beam 10 on the battery cell 121.

[0132] In some possible embodiments, see Fig. 9 As shown, 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 direction; the second sub-reinforcements 13b are connected to the middle section 12b. The number of the second sub-reinforcements 13b connected to the middle section 12b is not less than the number of the second sub-reinforcements 13b connected to the upper section 12a or the lower section 12c.

[0133] For the battery cell 121 , the expansion generated during the cycle process 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 .

[0134] 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 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, ensure that the limiting beam 10 can obtain a relatively better support effect and optimize the weight of the support ribs, thereby improving the energy density of the battery.

[0135] It can be understood 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 area of ​​the battery cell 121 .

[0136] In some possible embodiments, see Fig. 9 As shown, one end of all the second sub-ribs 13b are connected to the middle section 12b; and the other ends of all the second sub-ribs 13b are dispersedly supported on the first sub-plate 16a and / or the second sub-plate 16b of the support plate 16; thereby obtaining a relatively better supporting 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.

[0137] In some possible embodiments, see Figures 5 to 9 As shown, the limiting beam 10 extends along the second direction Y, wherein the first direction X and the second direction Y are intersecting; usually, the first direction X and the second direction Y are perpendicular.

[0138] The limiting beam 10 includes a plurality of supporting beams 20, all of which are arranged at intervals along the second direction Y and are respectively connected to the first beam side surface 11 along the first direction X. In this way, each limiting beam 10 corresponds to a plurality of supporting beams 20, so that the expansion deformation force transmitted by the limiting beam 10 is dispersed to the box body 112.

[0139] In some possible embodiments, see Figures 5 to 9 As shown, for the battery cell 121, the expansion generated during the cycle is mainly concentrated in the middle area of ​​the housing 123. Therefore, in order to better offset the expansion deformation force of the battery cell 121 during the cycle, the support beam 20 can be aligned with the middle area of ​​the battery cell 121. In this way, the expansion deformation force is directly transmitted to the support beam 20 through the limiting beam 10, which can improve the overall rigidity of the limiting beam 10 and effectively suppress the excessive expansion deformation of the battery cell 121 during the cycle.

[0140] Optionally, two limiting beams 10 are arranged relatively spaced apart on both sides of the box body 112 along the first direction X, and the area between the two limiting beams 10 and the bottom of the box body 112 together form a containing space, that is, an energy zone, for placing the battery cell 121.

[0141] The plane where the large surface of the battery cell 121 is located 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 suppress the excessive expansion and deformation of the battery cell 121 during the cycle process from both ends of the first direction X.

[0142] A second aspect of the embodiments of the present application provides an electric device 1000. The electric device 1000 includes the above-mentioned battery 100, and the battery 100 is used to provide electric energy to the electric device 1000.

[0143] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0144] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery, characterized in that: It comprises a battery cell (121) and a box body (110); The box body (110) comprises a box body (112) and a limiting beam (10); the limiting beam (10) is arranged in the box body (112) to define a containing space; the battery cell (121) is arranged in the containing space; The limiting beam (10) comprises a first beam side surface (11) and a second beam side surface (12) which are arranged opposite to each other along a first direction (X); 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 a portion of the first beam side surface (11) is arranged to be inclined toward the second beam side surface (12).

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

3. The battery according to claim 2, characterized in that The second beam side surface (12) and the second section (11b) have an included angle A, 0°<A≤20°.

4. The battery according to claim 2, characterized in that 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, characterized in that 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), wherein the plurality of support beams (20) are arranged at intervals along the second direction (Y) and are respectively connected to the side surfaces (11) of the first beam along the first direction (X).

6. The battery according to claim 4, characterized in that 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, characterized in that: The limiting beam (10) comprises at least one supporting rib (13), wherein 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, characterized in that The supporting ribs (13) are arranged obliquely relative to the first direction (X).

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

10. The battery according to claim 7, characterized in that 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 claim 7, characterized in that 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, characterized in that 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 6, characterized in that: The limiting beam (10) further comprises a top surface (14) and a bottom surface (15); The top surface (14) and the bottom surface (15) are respectively connected to 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, characterized in that The limiting beam (10) comprises a supporting plate (16); The support plate (16) is 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).

15. The battery according to claim 14, characterized in that 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, characterized in that The support plate (16) comprises a first sub-plate (16a) and a second sub-plate (16b) which are 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, characterized in that 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 claim 15, characterized in that 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 claim 15, characterized in that 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 arranged at intervals from each other and have opposite inclination directions relative to the first direction (X).

20. The battery according to claim 15, characterized in that At least one of the second sub-ribs (13b) is connected to the same position of the support plate (16) as the corresponding first sub-rib (13a).

21. The battery according to claim 15, characterized in that 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, characterized in that All of the second sub-ribs (13b) are connected to the middle section (12b).

23. An electrical device, characterized in that: A battery according to any one of claims 1 to 22, wherein the battery is used to provide electrical energy.

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