Battery and electric device

Abstract

The utility model relates to a battery and a power utilization device, the battery comprises a box body and a battery monomer, and the box body comprises a box body; the at least two limiting beams and the box body are enclosed to form an accommodating space; the limiting beam comprises a first beam side face and a second beam side face, the second beam side face is configured to be a vertical plane used for abutting against the large face of the battery single body, and the second beam side face and at least part of the first beam side face are arranged at an included angle; and the fixing pieces are connected among the limiting beams along the first direction. The battery monomers in the accommodating space are restrained through the limiting beams, the first beam side faces abut against the large faces of the battery monomers, and at least part of the first beam side faces are obliquely arranged towards the second beam side faces, so that the limiting beams stably support and restrain expansion on the battery monomers; in addition, the fixing pieces can limit the limiting beams in the first direction, the probability that the limiting beams topple over under the action of expansion deformation of the battery monomers is reduced, and the expansion constraining force on the battery monomers is further improved.

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] A battery cell is the smallest unit that makes up a battery. During the cycle, an electrochemical reaction occurs inside the battery cell, causing the battery cell to swell. As the battery cell continues to swell, it will affect the overall performance of the battery.

[0003] Therefore, when the battery cell is placed in the box, a certain support structure needs to be provided to constrain the expansion of the battery cell. However, the current support structure has a poor anti-expansion effect and cannot provide sufficient support and constraint for the expansion of the battery cell. Utility Model Content

[0004] Based on this, it is necessary to provide a battery and an electrical device to address the problem that the current support structure has poor anti-expansion effect and cannot provide sufficient support and restraint for the expansion of the battery cell.

[0005] In the first aspect, the present application provides a battery, including a battery cell and a box body, the box body including a box body, at least two limiting beams and a fixing member, each limiting beam is arranged in the box body at intervals along a first direction, and two adjacent limiting beams and the box body are enclosed to form a accommodating space for accommodating the battery cell; at least one limiting beam includes a first beam side surface and a second beam side surface arranged opposite to each other along the first direction, the second beam side surface is configured as a vertical plane for abutting against a large surface of the battery cell, the large surface is the 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; the fixing member extends along the first direction and is connected between two adjacent limiting beams, and is used to limit the two adjacent limiting beams along the first direction.

[0006] Through the above structure, the limiting beam can constrain the battery cell in the accommodation space, wherein the first beam side of the limiting beam can abut against the large surface of the battery cell, and the angle between the second beam side and at least part of the first beam side is set, so that the limiting beam can more stably support and constrain the expansion of the large surface of the battery cell. In addition, the fixing member can limit each limiting beam along the first direction, reduce the probability of the limiting beam tipping over under the action of the expansion deformation of the battery cell, and further improve the expansion constraint force on the battery cell.

[0007] In some embodiments, the fixing member has a connecting surface, which is disposed toward the accommodation space and is used to connect with the battery cell in the accommodation space.

[0008] By connecting the fixing member to the battery cell in the accommodating space via the connecting surface, the restraining force of the fixing member on the battery cell can be further enhanced.

[0009] In some embodiments, the box body further includes a connecting piece, which is disposed between the connecting surface and the top cover of the battery cell and is used to connect the fixing piece and the battery cell.

[0010] By providing the connecting piece, the connecting surface and the top cover of the battery cell can be quickly and stably connected, thereby further enhancing the restraining force of the fixing piece on the battery cell.

[0011] In some embodiments, the connector includes an adhesive.

[0012] In some embodiments, the fixing member and the limiting beams are detachably connected, thereby enabling the fixing member and the limiting beams to be more flexibly assembled and disassembled, and convenient for operation.

[0013] In some embodiments, the box body further includes a support beam, and the support beam is connected between the side surface of the first beam and the inner wall of the box body along the first direction.

[0014] Thus, the second beam side of the limit beam can better contact the large surface of the battery cell through the support beam, and form a stable support force for the battery cell. In addition, the expansion force on the battery cell can be smoothly transferred to the box body through the support beam, providing a better anti-expansion effect.

[0015] In some embodiments, the limiting beam extends along the second direction, and the first direction is arranged to intersect with the second direction;

[0016] The box body comprises a plurality of support beams, which are arranged at intervals along the second direction and are respectively connected between the side surfaces of the first beam and the inner wall of the box body along the first direction.

[0017] Through the above structure, the support beam can be better supported between the limiting beam and the box body, and the expansion force on the battery cell can be smoothly transferred to the box body through the support beam, providing a better anti-expansion effect.

[0018] In some embodiments, the side surface of the first beam includes a connected first section and a second section, one end of the supporting beam is connected to the first section along a first direction, and the second section is inclined toward the side surface of the second beam; the first section and the second section are coplanar; or, the first section and the side surface of the second beam are parallel.

[0019] Through the above structure, the support of the battery cell by the limiting beam is made more stable, and the expansion force of the battery cell is smoothly transferred from the limiting beam to the box body through the supporting beam, providing a better anti-expansion effect.

[0020] Furthermore, the limiting beam can provide a stable supporting force for the battery cell. On this basis, the supporting beam can better abut between the limiting beam and the inner wall of the box body, and smoothly transfer the expansion force on the battery cell to the box body.

[0021] In some embodiments, the second beam side surface and the second section have an included angle A, 0°<A≤20°.

[0022] Therefore, by setting the angle between the side surface of the second beam and the second section to the above range, the support force of the limiting beam for the battery cell can be improved, and the installation space inside the box body can be better utilized to improve space utilization.

[0023] In some embodiments, one end of the support beam is connected to the first section along the first direction, thereby making the support of the battery cell by the limit beam more stable, and the expansion force of the battery cell is smoothly transferred from the limit beam to the box body through the support beam, providing a better anti-expansion effect.

[0024] In some embodiments, the limiting beam includes at least one supporting rib connected between the first beam side surface and the second beam side surface.

[0025] Through the above structure, the supporting force between the side surface of the first beam and the side surface of the second beam can be improved, so that the limiting beam can support the battery cell more stably.

[0026] In some embodiments, the support ribs are arranged obliquely relative to the first direction. In this way, 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.

[0027] In some embodiments, the limiting beam includes a plurality of supporting ribs, and at least two adjacent supporting ribs are spaced apart from each other and have opposite inclination directions relative to the first direction.

[0028] By providing the supporting ribs, the structural stability of the limiting beam can be improved, so that the limiting beam can more stably restrain the expansion of the battery cell.

[0029] In some embodiments, at least one end of the supporting rib away from the side surface of the second beam is fixedly connected to the connection between the first section and the second section. Through the above structure, the overall stability of the limiting beam can be made higher.

[0030] In some embodiments, the second beam side includes an upper section, a middle section, and a lower section evenly divided along its height direction; the number of support ribs connected to the middle section is not less than the number of support ribs connected to the upper section or the lower section.

[0031] Through the above structure, the supporting ribs can better support and constrain the middle area of ​​the large surface of the battery cell.

[0032] In some embodiments, one end of all the support ribs is connected to the middle section, so that all the support ribs can support the middle area of ​​the large surface of the battery cell, and better restrain the expansion deformation of the large surface of the battery cell.

[0033] In some embodiments, the limiting beam further includes a top surface and a bottom surface, and 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.

[0034] Through the above structure, the limiting beam forms an internal cavity, that is, the limiting beam is set as a hollow structure, which can reduce the weight of the limiting beam. Therefore, when the limiting beam is set inside the box body, the overall weight of the box body and the battery can be reduced.

[0035] In some embodiments, the limiting beam includes a support plate connected between the top surface and the bottom surface to divide the inner cavity of the limiting beam into at least two sub-cavities.

[0036] Therefore, by providing the support plate, the internal cavity of the limiting beam is divided so that the limiting beam forms a multi-cavity structure, thereby being able to resist a greater expansion force and provide a better support effect.

[0037] In some embodiments, the 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 surface of the first beam and the support plate, and the second sub-rib is connected between the support plate and the side surface of the second beam.

[0038] By providing the first sub-rib and the second sub-rib, the first beam side, the support plate and the second beam side can be better supported, the structural strength of the limiting beam is improved, and the supporting stability of the limiting beam on the battery cell is improved.

[0039] In some embodiments, 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, and 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.

[0040] Through the above structure, when the limiting beam is used to support the battery cell, the expansion force on the large surface of the battery cell can be better transmitted to the supporting beam through the limiting beam, and then transmitted to the box body.

[0041] In some embodiments, one end of a first sub-rib is fixedly connected to the connection between the first section and the second section; and the other end of the first sub-rib is fixedly connected to the connection between the first sub-board and the second sub-board; one end of a second sub-rib is fixedly connected to the connection between the first sub-board and the second sub-board, and the other end of the second sub-rib is connected to the side of the second beam.

[0042] Through the above structure, not only the connection stability between the first section and the second section and between the first sub-plate and the second sub-plate can be improved, but also the expansion force on the battery cell can be smoothly transferred to the support plate and the side of the first beam through the first sub-rib and the second sub-rib, and finally transferred to the box body through the support beam.

[0043] 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.

[0044] In some embodiments, the limiting beam includes multiple first sub-ribs and multiple second sub-ribs; two adjacent first sub-ribs are spaced apart from each other and arranged in parallel; and / or at least two adjacent second sub-ribs are spaced apart from each other and have opposite inclination directions relative to the first direction.

[0045] In some embodiments, at least one second sub-rib is connected to the same position of the support plate as the corresponding first sub-rib.

[0046] Through the above structure, the overall structural strength of the limiting beam can be improved, so as to better support the battery cell and form a stable constraint on the expansion force of the battery cell.

[0047] In some embodiments, the second beam side includes an upper section, a middle section and a lower section evenly divided along its height direction, and the number of second sub-ribs connected to the middle section is not less than the number of second sub-ribs connected to the upper section or the lower section.

[0048] In some embodiments, all of the second sub-ribs are connected to the middle section.

[0049] Through the above structure, the second sub-rib can better support and constrain the middle area of ​​the large surface of the battery cell.

[0050] In a second aspect, the present application also provides an electrical device, comprising the battery as described above, and the battery is used to provide electrical energy to the electrical device.

[0051] The above-mentioned battery and electrical device place the battery cell in the accommodating space, and the limiting beams at both ends can constrain the battery cell in the accommodating space, wherein the first beam side surface of the limiting beam can abut against the large surface of the battery cell, and the angle between the second beam side surface and at least part of the first beam side surface is set, so that the limiting beam can more stably support and constrain the expansion of the large surface of the battery cell; in addition, the fixing member can limit each limiting beam along the first direction, reduce the probability of the limiting beam tipping over under the action of the expansion deformation of the battery cell, and further improve the expansion constraint force on the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a schematic diagram of the structure of a vehicle according to one or more embodiments.

[0053] Figure 2 is a schematic diagram of an exploded structure of a battery according to one or more embodiments.

[0054] Figure 3 is a schematic diagram of an exploded structure of a battery cell according to one or more embodiments.

[0055] Figure 4 It is a schematic diagram of the structure of a box according to one or more embodiments.

[0056] Figure 5 is a top view of a housing according to one or more embodiments.

[0057] Figure 6 is a side view of a housing according to one or more embodiments.

[0058] Figure 7 for Figure 6 A partial enlarged view of point B in the middle.

[0059] Figure 8 is a partial schematic diagram of a box according to one or more embodiments.

[0060] Fig. 9 is a partial schematic diagram of a box according to one or more embodiments.

[0061] Explanation of reference numerals: 1000, vehicle; 100, battery; 200, controller; 300, motor; 10, housing; 20, battery cell; 11, first part; 12, second part; 13, housing body; 14, limiting beam; 15, fixing member; 16, accommodating space; 17, connecting member; 18, supporting beam; 21, end cover; 22, housing; 23, electrode assembly; 141, first beam side; 142, second part Side surface of the second beam; 143, supporting ribs; 144, top surface; 145, bottom surface; 146, internal cavity; 147, supporting plate; 148, first sub-ribs; 149, second sub-ribs; 1411, first section; 1412, second section; 1421, upper section; 1422, middle section; 1423, lower section; 1471, first sub-plate; 1472, second sub-plate; a, first direction; b, second direction. DETAILED DESCRIPTION

[0062] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0063] In the description of the present application, it should be understood that 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 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 present application.

[0064] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In this application, unless otherwise clearly specified and limited, if the 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0066] 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.

[0067] 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.

[0068] 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 and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0069] A battery cell is the smallest unit that makes up a battery. During the cycle, an electrochemical reaction occurs inside the battery cell, causing the battery cell to swell. As the battery cell continues to swell, it will affect the overall performance of the battery.

[0070] Based on this, in order to prevent the battery cells from continuing to expand during the cycle, which would cause the battery performance to deteriorate, a certain support structure is usually set inside the box to support and constrain the battery cells inside the box. However, the current support structure has a poor anti-expansion effect and cannot provide sufficient support and restraint for the expansion of the battery cells.

[0071] Based on the above considerations, in order to solve the problem that the current support structure has poor anti-expansion effect and cannot provide sufficient support and restraint for the expansion of the battery cell, one or more embodiments of the present application provide a battery and an electrical device, wherein the battery cell is placed in a accommodating space, and the battery cell in the accommodating space can be restrained by limiting beams at both ends, wherein the first beam side surface of the limiting beam can abut against the large surface of the battery cell, and at least part of the first beam side surface is inclined toward the second beam side surface, so that the limiting beam can more stably support and restrain the expansion of the large surface of the battery cell; in addition, the fixing member can limit each limiting beam along the first direction, thereby reducing the probability of the limiting beam tipping over under the action of the expansion deformation of the battery cell, and further improving the expansion restraint on the battery cell.

[0072] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, 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, and a spacecraft, etc.

[0073] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0074] Please refer to Figure 1 The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. 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. 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. The controller 200 is used to control the battery 100 to power the motor 300, for example, to meet the power requirements for starting, navigating and driving the vehicle 1000.

[0075] 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.

[0076] Please refer to Figure 2 The battery 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is accommodated inside the box body 10. The box body 10 is used to provide a storage space for the battery cell 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first part 11 and a second part 12, and the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0077] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0078] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0079] Please refer to Figure 3 The battery cell 20 refers to the smallest unit that constitutes the battery. Figure 3 The battery cell 20 includes an end cover 21, a shell 22, an electrode assembly 23 and other functional components.

[0080] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 21a can be provided on the end cap 21. The electrode terminal can be used to electrically connect to the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0081] The shell 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, the electrolyte and other components. The shell 22 and the end cap 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cap 21 at the opening. Without limitation, the end cap 21 and the shell 22 can also be integrated. Specifically, the end cap 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when the interior of the shell 22 needs to be encapsulated, the end cap 21 covers the shell 22. The shell 22 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 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 22 can be various, 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.

[0082] The electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 23 may be included in the housing 22. The electrode assembly 23 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, and the parts of the positive and negative electrode sheets without active materials each constitute a lug. The positive and negative electrode lugs may be located together at one end of the main body or at both ends of the main body, respectively. During the charge and discharge process of the battery, the positive and negative electrode active materials react with the electrolyte, and the lugs connect the electrode terminals to form a current loop.

[0083] Please also read Figure 4 , Figure 5 , Figure 6 as well as Figure 7 In one embodiment of the present application, a battery 100 is provided. The battery 100 includes a box body 10 and a battery cell 20. The box body 10 includes a box body 13, a limiting beam 14 and a fixing member 15. The limiting beam 14 includes at least two, and is arranged in the box body 13 at intervals along the first direction a. The two adjacent limiting beams 14 and the box body 13 enclose a receiving space 16 for accommodating the battery cell 20. At least one limiting beam 14 includes a first beam side surface 141 and a second beam side surface 142 arranged opposite to each other along the first direction a. The second beam side surface 142 is configured as a vertical plane for abutting against the large surface of the battery cell 20. The large surface is the surface with the largest surface area in the battery cell 20. At least part of the first beam side surface 141 is inclined toward the second beam side surface 142. The fixing member 15 extends along the first direction a and is connected between the two adjacent limiting beams 14, and is used to limit the two adjacent limiting beams 14 along the first direction a.

[0084] It should be noted that the box body 13 refers to a structure with a hollow interior that can provide a base for installing and accommodating the battery cell 20 and other structures in the battery 100. When the battery cell 20 is arranged inside the box body 13, the box body 13 can provide a closed and stable environment for the battery cell 20, and play a certain protective role for the battery cell 20.

[0085] The limiting beam 14 refers to a structure disposed inside the box body 13, which can support the battery cell 20 to restrict the expansion deformation of the battery cell 20. Two limiting beams 14 can be provided, and they are respectively disposed on opposite sides of the box body 13 along the first direction a. In this way, the two limiting beams 14 and the inner wall of the box body 13 together enclose a receiving space 16, and the battery cell 20 can be placed in the receiving space 16.

[0086] The large surface of the battery cell 20 refers to the surface with the largest surface area in the battery cell 20. Specifically, the battery cell 20 is usually arranged in a rectangular structure, and the battery cell 20 usually includes two large surfaces, and the two large surfaces are arranged opposite to each other and parallel to each other.

[0087] Furthermore, at least one limiting beam 14 includes a first beam side surface 141 and a second beam side surface 142 that are arranged opposite to each other along the first direction a, and the second beam side surface 142 is arranged toward the large surface of the battery cell 20 in the accommodation space 16 and extends in the vertical direction. When the battery cell 20 is placed in the accommodation space 16, the second beam side surface 142 of the limiting beam 14 can abut against the large surface of the battery cell 20, thereby forming a good support effect on the large surface of the battery cell 20.

[0088] The second beam side surface 142 is set at an angle with at least part of the first beam side surface 141, that is, at least part of the first beam side surface 141 is set obliquely along the vertical direction, and the distance between the inclined first beam side surface 141 and the second beam side surface 142 gradually increases from top to bottom. Therefore, the support of the limiting beam 14 for the battery cell 20 is more stable.

[0089] It can be understood that in some other embodiments, the number of the limiting beams 14 can also be set to be greater, and every two adjacent limiting beams 14 are spaced apart along the first direction a, thereby forming a accommodating space 16 between the inner wall of the box body 13, and each accommodating space 16 can be used to install a battery cell 20.

[0090] In addition, the fixing member 15 refers to a structure that can be connected to each limiting beam 14 and limit each limiting beam 14 along the first direction a so as to better fix the battery cell 20 in the accommodating space 16 .

[0091] Specifically, the fixing member 15 can be, but is not limited to, a steel belt structure, and the steel belt is extended along the first direction a. Taking the arrangement of two limit beams 14 as an example, the opposite ends of the steel belt in the first direction a are respectively connected to the two limit beams 14, thereby providing tension to the two limit beams 14 along the first direction a.

[0092] In this way, when the expansion force of the battery cell 20 is large, the steel belt can tighten the limit beams 14 at both ends through tension, reducing the probability of the limit beams 14 tipping over due to the expansion force of the battery cell 20, thereby making the support and restraint of the battery cell 20 by the limit beams 14 more stable.

[0093] Through the above structure, the limiting beam 14 can constrain the battery cell 20 in the accommodating space 16, wherein the first beam side surface 141 of the limiting beam 14 can abut against the large surface of the battery cell 20, and the angle between the second beam side surface 142 and at least part of the first beam side surface 141 is set, so that the limiting beam 14 can more stably support and constrain the expansion of the large surface of the battery cell 20. In addition, the fixing member 15 can limit each limiting beam 14 along the first direction a, reduce the probability of the limiting beam 14 tipping over under the action of the expansion deformation of the battery cell 20, and further improve the expansion constraint force on the battery cell 20.

[0094] In some embodiments, the fixing member 15 has a connecting surface (not shown in the figure), which is arranged toward the accommodation space 16 and is used to connect with the battery cell 20 in the accommodation space 16 .

[0095] Specifically, when the fixing member 15 is connected to the top ends of the two limiting beams 14, the connection surface is the bottom surface 145 of the fixing member 15. When the battery cell 20 is placed in the accommodation space 16, the connection surface is arranged toward the battery cell 20.

[0096] Thus, the fixing member 15 is connected to the battery cell 20 in the accommodation space 16 via the connection surface, so that the restraining force of the fixing member 15 on the battery cell 20 can be further enhanced.

[0097] In some embodiments, the box body 10 further includes a connector 17 , which is disposed between the connecting surface and the top cover of the battery cell 20 and is used to connect the fixing member 15 and the battery cell 20 .

[0098] Preferably, the connector 17 includes an adhesive. Specifically, the adhesive may be, but is not limited to, a structural adhesive, that is, the structural adhesive is applied between the connecting surface and the top cover of the battery cell 20 to fix the fixing member 15 and the battery cell 20, thereby enhancing the restraint force of the fixing member 15 on the battery cell 20.

[0099] Of course, the connecting member 17 can also be set to other structures, such as double-sided tape or other connecting structures, which will not be described here.

[0100] By providing the connecting member 17 , the connecting surface can be quickly and stably connected to the top cover of the battery cell 20 , thereby further enhancing the restraining force of the fixing member 15 on the battery cell 20 .

[0101] In some embodiments, the fixing member 15 and each limiting beam 14 are detachably connected.

[0102] Specifically, the fixing member 15 and each limiting beam 14 can be detachably connected by bolt connection, snap connection or other connection methods, but not limited to, so that the fixing member 15 and each limiting beam 14 can be more flexibly assembled and disassembled, which is convenient for operation.

[0103] like Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the battery 10 further includes a support beam 18 , and the support beam 18 is connected between the first beam side surface 141 and the inner wall of the box body 13 along the first direction a.

[0104] Specifically, the support beam 18 is extended along the first direction a, and two opposite ends of the support beam 18 are respectively in contact with the first beam side surface 141 and the inner wall of the box body 13 .

[0105] Thus, through the support beam 18, the second beam side surface 142 of the limiting beam 14 can better abut against the large surface of the battery cell 20, and form a stable support force for the battery cell 20. In addition, the expansion force on the battery cell 20 can be smoothly transferred to the box body 13 through the support beam 18, providing a better anti-expansion effect.

[0106] In some embodiments, the first beam side 141 includes a connected first section 1411 and a second section 1412, one end of the support beam 18 is connected to the first section 1411 along a first direction a, and the second section 1412 is inclined toward the second beam side 142; the first section 1411 and the second section 1412 are coplanar; or, the first section 1411 and the second beam side 142 are parallel.

[0107] Specifically, the first section 1411 and the second section 1412 are arranged in sequence along the vertical direction, that is, the second section 1412 is arranged at the upper end of the first section 1411 .

[0108] The second section 1412 is angled with the second beam side surface 142 , that is, the second section 1412 is inclined along the vertical direction, so that the limiting beam 14 forms a structure with a small top and a large bottom, so as to provide more stable support for the battery cell 20 .

[0109] Furthermore, the support beam 18 is disposed on the bottom surface 145 of the box body 13 and extends along the first direction a. One end of the support beam 18 abuts against the inner wall of the box body 13, and the other end abuts against the first section 1411, so as to transfer the expansion force of the battery cell 20 from the limiting beam 14 to the box body 13, providing a better anti-expansion effect.

[0110] In addition, one end of the support beam 18 is connected to the first section 1411 along the first direction a. Thus, the support of the battery cell 20 by the limit beam 14 is more stable, and the expansion force of the battery cell 20 is smoothly transmitted from the limit beam 14 to the box body 10 through the support beam 18, providing a better anti-expansion effect.

[0111] Therefore, through the above structure, the support of the battery cell 20 by the limiting beam 14 is made more stable, and the expansion force of the battery cell 20 is smoothly transferred from the limiting beam 14 to the box body 13 through the support beam 18, providing a better anti-expansion effect.

[0112] In addition, the first section 1411 and the second section 1412 are disposed in the same plane; or, the first section 1411 and the second beam side surface 142 are disposed in parallel.

[0113] When the first section 1411 and the second section 1412 are arranged on the same plane, the first section 1411 and the second section 1412 are inclined in the vertical direction, and the inclination angles of the two sections are equal. At this time, the first section 1411 and the second section 1412 form an inclined surface together. When the support beam 18 abuts against the first section 1411, the end of the support beam 18 needs to be arranged to match the slope of the first section 1411 so that the two can be tightly connected.

[0114] When the first section 1411 is arranged parallel to the second beam side 142, the first section 1411 is arranged in the vertical direction, and the first section 1411 intersects with the second section 1412. In this case, the support beam 18 is perpendicular to the first section 1411, so that the support beam 18 can abut against the first section 1411 more stably.

[0115] Through the above structure, the limiting beam 14 can provide stable support force for the battery cell 20. On this basis, the support beam 18 can better abut between the limiting beam 14 and the inner wall of the box body 13 to smoothly transfer the expansion force on the battery cell 20 to the box body 13.

[0116] In some embodiments, the second beam side surface 142 and the second section 1412 have an included angle A, where 0°<A≤20°.

[0117] Specifically, the angle between the second beam side surface 142 and the second section 1412 is the angle at which the second section 1412 is inclined relative to the vertical direction. Therefore, the larger the angle A, the better the supporting effect of the limiting beam 14 on the battery cell 20. However, as a result, the larger the installation space occupied by the limiting beam 14 in the box body 13, the more disadvantageous it is for the installation of other structures of the battery 100 inside the box body 13.

[0118] Therefore, by setting the angle between the second beam side surface 142 and the second section 1412 to the above range, the support force of the limiting beam 14 for the battery cell 20 can be improved, and the installation space inside the box body 13 can be better utilized to improve space utilization.

[0119] In some embodiments, the limiting beam 14 includes at least one supporting rib 143 , and the supporting rib 143 is connected between the first beam side surface 141 and the second beam side surface 142 .

[0120] Specifically, the inner hollow space of the limiting beam 14 can reduce the weight of the limiting beam 14, thereby reducing the overall weight of the battery 100. At the same time, a support rib 143 is provided inside the limiting beam 14, and the support rib 143 is supported between the first beam side surface 141 and the second beam side surface 142, thereby increasing the supporting force between the first beam side surface 141 and the second beam side surface 142, so that the limiting beam 14 can support the battery cell 20 more stably.

[0121] In some embodiments, the support ribs 143 are arranged obliquely relative to the first direction a. Thus, when the battery cell 20 generates expansion deformation force during the cycle, the support ribs 143 connected to the second beam side 142 can transfer the expansion deformation force obtained in the first direction a to the first beam side 142 after changing the direction, and then transfer it to the support beam 18, thereby improving the overall rigidity of the limit beam 14 in resisting deformation in the first direction a, and effectively avoiding excessive expansion deformation of the battery cell 20 during the cycle.

[0122] In some embodiments, the limiting beam 14 includes a plurality of supporting ribs 143 , and at least two adjacent supporting ribs 143 are spaced apart from each other and have opposite inclination directions relative to the first direction a.

[0123] The multiple support ribs 143 can improve the support force for the first beam side surface 141 and the second beam side surface 142, and the multiple support ribs 143 are arranged at intervals in the vertical direction, so that uniform multi-point support is formed on the first beam side surface 141 and the second beam side surface 142, thereby improving the support stability.

[0124] In addition, two adjacent supporting ribs 143 are spaced apart and have opposite inclination directions relative to the first direction a, which can further improve the supporting stability.

[0125] By providing the supporting ribs 143 , the structural stability of the limiting beam 14 can be improved, so that the limiting beam 14 can more stably restrain the expansion of the battery cell 20 .

[0126] In some embodiments, one end of at least one supporting rib 143 away from the second beam side surface 142 is fixedly connected to the connection between the first section 1411 and the second section 1412 .

[0127] By fixing one end of the support rib 143 away from the second beam side surface 142 to the connection between the first section 1411 and the second section 1412, the support rib 143 can form a certain connection between the first section 1411 and the second section 1412, and can also play a supporting role for the first section 1411 and the second section 1412. Therefore, through the above structure, the overall stability of the limiting beam 14 can be made higher.

[0128] In some embodiments, the second beam side surface 142 includes an upper section 1421, a middle section 1422, and a lower section 1423 equally divided along its height direction. The number of support ribs 143 connected to the middle section 1422 is not less than the number of support ribs 143 connected to the upper section 1421 or the lower section 1423.

[0129] It should be noted that the support rib 143 connected to the middle section 1422 means that one end of the support rib 143 connected to the second beam side 142 falls on the middle section 1422 of the second beam side 142. Similarly, one end of the support rib 143 connected to the second beam side 142 may also fall on the upper section 1421 or the lower section 1423.

[0130] Specifically, the middle section 1422 of the second beam side surface 142 is located between the upper section 1421 and the lower section 1423 . When the second beam side surface 142 abuts against the large surface of the battery cell 20 , the middle section 1422 can correspond to the middle area of ​​the large surface of the battery cell 20 .

[0131] When the battery cell 20 expands, since the large surface of the battery cell 20 has the largest area, the expansion deformation on the large surface is usually larger and mostly concentrated in the middle area of ​​the large surface.

[0132] Therefore, the number of support ribs 143 connected to the middle section 1422 is not less than the number of support ribs 143 connected to the upper section 1421 or the lower section 1423, that is, the support ribs 143 have a greater supporting force on the middle section 1422, thereby being able to better support and constrain the large surface of the battery cell 20.

[0133] Through the above structure, the support ribs 143 can better support and constrain the middle area of ​​the large surface of the battery cell 20 .

[0134] In some embodiments, one end of all the support ribs 143 is connected to the middle section 1422 .

[0135] Thus, one end of all the support ribs 143 is disposed in the middle section 1422 , so that all the support ribs 143 can support the middle area of ​​the large surface of the battery cell 20 , thereby better restraining the expansion deformation of the large surface of the battery cell 20 .

[0136] In some embodiments, the limiting beam 14 further includes a top surface 144 and a bottom surface 145 , which are respectively connected to two ends of the first beam side surface 141 and the second beam side surface 142 to enclose an internal cavity 146 of the limiting beam 14 .

[0137] Through the above structure, the limiting beam 14 forms an internal cavity 146, that is, the limiting beam 14 is set as a hollow structure, which can reduce the weight of the limiting beam 14. Therefore, when the limiting beam 14 is set inside the box body 13, the overall weight of the box body 13 and the battery 100 can be reduced.

[0138] like Figure 6 and Fig. 9 As shown, in some embodiments, the limiting beam 14 includes a support plate 147 , and the support plate 147 is connected between the top surface 144 and the bottom surface 145 to separate the inner cavity 146 of the limiting beam 14 into at least two sub-cavities.

[0139] Specifically, the support plate 147 can be set to a structure matching the first beam side 141, that is, when the first beam side 141 includes a first section 1411 and a second section 1412, the support plate 147 is also set to a two-section structure, and is respectively corresponding to and parallel to the first section 1411 and the second section 1412.

[0140] Furthermore, the support plate 147 can be provided as one piece, and the inner cavity 146 of the limiting beam 14 can be divided into two sub-cavities arranged in sequence along the first direction a. Of course, the support plate 147 can also be provided as two or more pieces, and the inner cavity 146 of the limiting beam 14 can be divided into multiple sub-cavities.

[0141] Therefore, by providing the support plate 147 , the internal cavity 146 of the limiting beam 14 is divided, so that the limiting beam 14 forms a multi-cavity structure, thereby being able to resist a greater expansion force and provide a better support effect.

[0142] In some embodiments, the limiting beam 14 includes at least one first sub-rib 148 and at least one second sub-rib 149 , the first sub-rib 148 is connected between the first beam side 141 and the support plate 147 , and the second sub-rib 149 is connected between the support plate 147 and the second beam side 142 .

[0143] Specifically, when the inner cavity 146 is divided into two sub-cavities by the support plate 147, the first sub-rib 148 may be disposed in the sub-cavity between the first beam side surface 141 and the support plate 147, so that the first sub-rib 148 is supported between the first beam side surface 141 and the support plate 147. The second sub-rib 149 may be disposed in the sub-cavity between the support plate 147 and the second beam side surface 142, so that the second sub-rib 149 is supported between the support plate 147 and the second beam side surface 142.

[0144] Furthermore, a plurality of the first sub-ribs 148 and the second sub-ribs 149 can be provided and spaced apart in the vertical direction to improve the supporting effect.

[0145] By providing the first sub-rib 148 and the second sub-rib 149 , the first beam side 141 , the support plate 147 and the second beam side 142 can be better supported, thereby improving the structural strength of the limiting beam 14 and improving the supporting stability of the limiting beam 14 on the battery cell 20 .

[0146] In some embodiments, the support plate 147 includes a first sub-plate 1471 and a second sub-plate 1472 connected to each other, the second sub-plate 1472 is tilted toward the second beam side 142, and the first sub-plate 1471 and the second sub-plate 1472 are coplanar; or, the first sub-plate 1471 is parallel to the second beam side 142.

[0147] Specifically, the first sub-plate 1471 corresponds to the second section 1412 and is arranged parallel to each other, and the first sub-plate 1471 corresponds to the first section 1411 and is arranged parallel to each other. Thus, the second sub-plate 1472 and the second section 1412 are arranged at an angle with the second beam side surface 142, and the angles are equal.

[0148] Through the above structure, when the limiting beam 14 is used to support the battery cell 20 , the expansion force on the large surface of the battery cell 20 can be better transmitted to the support beam 18 through the limiting beam 14 , and then transmitted to the box body 13 .

[0149] In some embodiments, one end of a first sub-rib 148 is fixedly connected to the connection between the first section 1411 and the second section 1412, and the other end of the first sub-rib 148 is fixedly connected to the connection between the first sub-plate 1471 and the second sub-plate 1472, and one end of a second sub-rib 149 is fixedly connected to the connection between the first sub-plate 1471 and the second sub-plate 1472, and the other end of the second sub-rib 149 is connected to the second beam side 142.

[0150] Specifically, the first sub-rib 148 is arranged between the first beam side 141 and the support plate 147, one end of one of the first sub-ribs 148 is arranged at the connection between the first section 1411 and the second section 1412, and the other end is arranged at the connection between the first sub-plate 1471 and the second sub-plate 1472, thereby improving the structural stability of the first beam side 141 and the support plate 147.

[0151] The second sub-ribs 149 are arranged between the support plate 147 and the second beam side surface 142, and one end of one of the second sub-ribs 149 is arranged at the connection between the first sub-plate 1471 and the second sub-plate 1472, and the other end is connected to the middle section 1422 of the second beam side surface 142. In this way, not only the connection stability between the support plate 147 and the second beam side surface 142 can be improved, but also the expansion deformation of the middle area on the large surface of the battery cell 20 can be better restrained.

[0152] Through the above structure, not only the connection stability between the first section 1411 and the second section 1412 and between the first sub-plate 1471 and the second sub-plate 1472 can be improved, but also the expansion force on the battery cell 20 can be smoothly transferred to the support plate 147 and the first beam side 141 through the first sub-rib 148 and the second sub-rib 149, and finally transferred to the box body 13 through the support beam 18.

[0153] The first sub-rib 148 is arranged parallel to the first direction a, and the second sub-rib 149 is arranged obliquely relative to the first direction a. In this way, when the battery cell 20 generates an expansion deformation force during the cycle, the second sub-rib 149 connected to the second beam side 142 can change the direction of the expansion deformation force obtained in the first direction a and transfer it to the support plate 147, and then the support plate 147 transmits it to the first beam side 142 along the first direction a through the first sub-rib 148, and then the expansion deformation force can be transferred to the support beam 18, thereby improving the overall stiffness of the limit beam 14 in resisting deformation in the first direction a, and effectively avoiding excessive expansion deformation of the battery cell 20 during the cycle.

[0154] In some embodiments, the limiting beam 14 includes a plurality of first sub-ribs 148 and a plurality of second sub-ribs 149, two adjacent first sub-ribs 148 are spaced apart from each other and arranged in parallel, and / or at least two adjacent second sub-ribs 149 are spaced apart from each other and have opposite inclination directions relative to the first direction a.

[0155] In some embodiments, at least one second sub-rib 149 is connected to the same position of the support plate 147 as the corresponding first sub-rib 148 .

[0156] Specifically, two adjacent second sub-ribs 149 are spaced apart from each other and have opposite inclination directions relative to the first direction a, and the position where the second sub-ribs 149 are connected to the second beam side 142 is set in the middle section 1422 of the second beam side 142, so as to better support the battery cell 20 through the second sub-ribs 149 and restrain the expansion force on the large surface of the battery cell 20.

[0157] Furthermore, two adjacent first sub-ribs 148 are spaced apart from each other and arranged in parallel, so as to better transfer the force on the support plate 147 to the first beam side surface 141 .

[0158] In addition, each second sub-rib 149 is disposed at the same position as the corresponding first sub-rib 148 on the support plate 147 , so that the force on the support plate 147 is uniform.

[0159] Through the above structure, the overall structural strength of the limiting beam 14 can be improved, so as to better support the battery cell 20 and form a stable constraint on the expansion force of the battery cell 20 .

[0160] In some embodiments, the second beam side 142 includes an upper section 1421, a middle section 1422 and a lower section 1423 evenly divided along its height direction, and the number of second sub-ribs 149 connected to the middle section 1423 is not less than the number of second sub-ribs 149 connected to the upper section 1421 or to the lower section 123.

[0161] In some embodiments, all second sub-ribs 149 are connected by the middle section 1422 .

[0162] Specifically, the second sub-rib 149 is the supporting rib 143 , and the connection position between the second sub-rib 149 and the second beam side 142 is set in the middle section 1422 , so that the second sub-rib 149 can better support and constrain the middle area of ​​the large surface of the battery cell 20 .

[0163] Please see again Figure 5 , Figure 6 and Figure 7 In some embodiments, the limiting beam 14 extends along the second direction b, and the first direction a intersects the second direction b. The battery 10 includes a plurality of support beams 18, which are arranged at intervals along the second direction b and are respectively connected between the first beam side surface 141 and the inner wall of the box body 13 along the first direction a.

[0164] Specifically, the first direction a and the second direction b are perpendicular to each other, the first direction a is set as the length direction of the box body 13 , and the second direction b is set as the width direction of the box body 13 .

[0165] The supporting beams 18 may be provided in plurality and spaced from each other along the second direction b. One end of each supporting beam 18 abuts against the first beam side surface 141 of the limiting beam 14 and corresponds to the middle position of the large surface of the battery cell 20, and the other end abuts against the inner wall of the box body 13, so as to better transfer the expansion force on the large surface of the battery cell 20 to the box body 13, thereby constraining the expansion on the large surface of the battery cell 20.

[0166] Through the above structure, the support beam 18 can be better supported between the limiting beam 14 and the box body 13, and the expansion force on the battery cell 20 can be smoothly transferred to the box body 13 through the support beam 18, providing a better anti-expansion effect.

[0167] In addition, the battery 100 includes a plurality of battery cells 20, which are arranged in a plurality of rows, and each row of battery cells 20 is arranged in sequence along the first direction a. The limiting beam 14 abuts against the opposite ends of each row of battery cells 20 along the first direction a, and makes the large surfaces of the battery cells 20 at the two ends of each row abut against the second beam side surface 142 of the limiting beam 14.

[0168] Furthermore, the two ends of the fixing member 15 are fixed to the limiting beams 14 on both sides, and at the same time, the supporting beam 18 is supported between the first beam side surface 141 of the limiting beam 14 and the inner wall of the box body 13. Thus, the battery cells 20 in the accommodating space 16 are restrained and supported.

[0169] Based on the same concept as the above-mentioned battery 100, the present application also provides an electrical device, including the above-mentioned battery 100, and the battery 100 is used to provide electrical energy to the electrical device.

[0170] According to one or more embodiments, two limiting beams 14 are respectively arranged inside the box body 13 along the first direction a, and then the battery cell 20 is placed in the accommodating space 16 formed by the limiting beams 14 and the box body 13, and the large surface of the battery cell 20 is abutted against the second beam side surface 142 of the limiting beam 14.

[0171] Furthermore, the fixing member 15 is extended along the first direction a, and the two opposite ends are respectively connected to the two limit beams 14, and then a structural adhesive is applied between the fixing member 15 and the top cover of the battery cell 20 to connect the two. Among them, the fixing member 15 can be provided in plurality, and each fixing member 15 can be arranged at intervals along the second direction b and connected to the limit beams 14 respectively.

[0172] Then, the support beam 18 is extended along the first direction a and supported between the limiting beam 14 and the inner wall of the box body 13. When the battery cell 20 expands, the limiting beam 14 and the support beam 18 can constrain and support the battery cell 20. On this basis, the fixing member 15 can form a pulling force on the two limiting beams 14, and the fixing member 15 is fixed to the battery cell 20, which can further enhance the restraint force on the battery cell 20. Finally, the expansion force on the battery cell 20 is transmitted to the box body 13 through the support beam 18, which has a good anti-expansion effect.

[0173] 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.

[0174] 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 includes a battery cell and a box body, and the box body includes: Box body; At least two limiting beams are arranged in the box body at intervals along a first direction, and two adjacent limiting beams and the box body are enclosed to form a storage space for accommodating a battery cell; at least one limiting beam comprises a first beam side surface and a second beam side surface arranged opposite to each other along the first direction, and the second beam side surface is configured as a vertical plane for abutting against a large surface of the battery cell, and the large surface is the surface with the largest surface area in the battery cell, and at least a part of the first beam side surface is inclined toward the second beam side surface; and A fixing member extends along the first direction and is connected between two adjacent limiting beams, and is used for limiting the two adjacent limiting beams along the first direction.

2. The battery according to claim 1, characterized in that The fixing member has a connecting surface, which is arranged toward the accommodating space and is used to be connected to the battery cell in the accommodating space.

3. The battery according to claim 2, characterized in that The box body further includes a connecting member, which is disposed between the connecting surface and the top cover of the battery cell and is used to connect the fixing member and the battery cell.

4. The battery according to claim 3, characterized in that The connecting member includes an adhesive.

5. The battery according to any one of claims 1 to 4, characterized in that: The fixing member is detachably connected to the limiting beam.

6. The battery according to claim 1, characterized in that The box body further includes a support beam connected between a side surface of the first beam and an inner wall of the box body along the first direction.

7. The battery according to claim 6, characterized in that The limiting beam extends along a second direction, and the first direction intersects with the second direction; The box body includes a plurality of support beams, which are arranged at intervals along the second direction and are respectively connected between the side surfaces of the first beams and the inner wall of the box body along the first direction.

8. The battery according to claim 6, characterized in that The side surface of the first beam includes a first section and a second section connected to each other, one end of the support beam is connected to the first section along the first direction, and the second section is inclined toward the side surface of the second beam; The first section is arranged coplanarly with the second section; or, the first section is arranged parallel to the side surface of the second beam.

9. The battery according to claim 8, characterized in that The second beam side surface and the second section have an included angle A, 0°<A≤20°.

10. The battery according to claim 8, characterized in that The limiting beam includes at least one supporting rib, and the supporting rib is connected between the side surface of the first beam and the side surface of the second beam.

11. The battery according to claim 10, characterized in that The supporting ribs are arranged obliquely relative to the first direction.

12. The battery according to claim 10, characterized in that The limiting beam includes a plurality of the supporting ribs, and at least two adjacent supporting ribs are spaced apart from each other and have opposite inclination directions relative to the first direction.

13. The battery according to claim 12, characterized in that One end of at least one of the support ribs away from the side surface of the second beam is fixedly connected to the connection between the first section and the second section.

14. The battery according to claim 10, characterized in that The second beam side surface includes an upper section, a middle section and a lower section which are evenly divided along the height direction thereof; The number of the supporting ribs connected to the middle section is not less than the number of the supporting ribs connected to the upper section or to the lower section.

15. The battery according to claim 14, characterized in that One end of all the support ribs is connected to the middle section.

16. The battery according to claim 8, characterized in that The limiting beam also 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 inner cavity of the limiting beam.

17. The battery according to claim 16, characterized in that The limiting beam includes a support plate; The support plate is connected between the top surface and the bottom surface to divide the inner cavity of the limiting beam into at least two sub-cavities.

18. The battery according to claim 17, characterized in that The 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 surface of the first beam and the support plate, and the second sub-rib is connected between the support plate and the side surface of the second beam.

19. The battery according to claim 18, characterized in that The support plate comprises a first sub-plate and a second sub-plate connected to each other, and the second sub-plate is arranged obliquely toward the side of the second beam; The first sub-plate is arranged coplanarly with the second sub-plate; or, the first sub-plate is arranged parallel to a side surface of the second beam.

20. The battery according to claim 19, characterized in that One end of one of the first sub-ribs is fixedly connected to the connection between the first section and the second section; and the other end of the first sub-rib is fixedly connected to the connection between the first sub-board and the second sub-board; 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.

21. The battery according to claim 18, characterized in that The first sub-rib is arranged parallel to the first direction, and the second sub-rib is arranged obliquely relative to the first direction.

22. The battery according to claim 18, characterized in that 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 from each other and arranged in parallel; And / or, at least two adjacent second sub-ribs are spaced apart from each other and have opposite inclination directions relative to the first direction.

23. The battery according to claim 18, characterized in that At least one of the second sub-ribs is connected to the same position of the support plate as the corresponding first sub-rib.

24. The battery according to claim 18, characterized in that The side surface of the second beam includes an upper section, a middle section and a lower section evenly divided along its height direction, and 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.

25. The battery according to claim 24, characterized in that All of the second sub-ribs are connected to the middle section.

26. An electrical device, characterized in that: The invention comprises a battery as described in any one of claims 1 to 25, wherein the battery is used to provide electrical energy to the electrical device.

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