Box body, battery and electric device

Abstract

The utility model provides a box body, a battery and a power utilization device, and belongs to the technical field of batteries. The box body comprises a frame body, a partition beam and a reinforcing piece. The partition beam is arranged in the frame body, the partition beam is configured to divide the accommodating space into a first accommodating space and a second accommodating space, and the first accommodating space is used for accommodating the battery monomer. The reinforcing piece is arranged in the second containing space and arranged between the partition beam and the frame body. By arranging the reinforcers between the frame body and the partition beams, the reinforcers can support the partition beams, so that when the battery monomers accommodated in the first accommodating space displace or expand, the force of the battery monomers acting on the partition beams can be transmitted to the frame body through the reinforcers; therefore, the non-deformability of the separation beam under the extrusion of the battery monomers can be effectively improved, and the service life and the use safety of the battery can be further improved.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to international patent application PCT / CN2022 / 115918, filed on August 30, 2022, entitled “Box, Battery and Electrical Device”, the entire contents of which are incorporated herein by reference. Technical Field

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

[0004] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. With the vigorous promotion of new energy vehicles, the demand for power batteries is also growing. As the core components of new energy vehicles, batteries have high requirements in terms of endurance, such as the energy density and weight of batteries. Among them, the battery consists of a box and a plurality of battery cells stacked in the box. However, the battery cells will expand in volume during the recycling process, which can easily lead to the risk of fire and explosion of the battery cells due to expansion and deformation, resulting in a short battery life and a large safety hazard. Utility Model Content

[0005] The embodiments of the present application provide a box, a battery and an electrical device, which can effectively improve the service life and safety of the battery.

[0006] In the first aspect, an embodiment of the present application provides a box body, including a frame body, a partition beam and a reinforcement member; the frame body forms a accommodating space; the partition beam is arranged in the frame body, and the partition beam is configured to divide the accommodating space into a first accommodating space and a second accommodating space, and the first accommodating space is used to accommodate battery cells; the reinforcement member is arranged in the second accommodating space, and the reinforcement member is arranged between the partition beam and the frame body.

[0007] In the above technical solution, a partition beam is provided in the storage space of the frame body, and the partition beam can divide the storage space into a first storage space for storing battery cells and a second storage space for storing other battery components, so that the partition beam can limit the displacement of the battery cells or the expansion during use. By arranging a reinforcement in the second accommodating space and arranging the reinforcement between the frame and the partition beam, the reinforcement can provide support for the partition beam without occupying the space for placing the battery cell. When the battery cell accommodated in the first accommodating space is displaced or expanded, the force exerted by the battery cell on the partition beam can be transmitted to the frame through the reinforcement, thereby effectively improving the deformation resistance of the partition beam under the extrusion of the battery cell. On the one hand, the box body with this structure can effectively alleviate the deformation of the partition beam, which is beneficial to improving the effect of the partition beam in resisting the displacement or expansion of the battery cell, so as to reduce the risk of fire and explosion of the battery cell due to displacement, collision or expansion deformation, thereby improving the service life and safety of the battery with this box body. On the other hand, it can reduce the design requirements of the partition beam to resist the displacement or expansion of the battery cell. That is to say, it can reduce the structural strength of the partition beam itself, thereby simplifying the structural design of the partition beam to reduce the weight and volume of the partition beam, which is beneficial to improving the internal space utilization rate of the battery with this box body and achieving lightweight batteries.

[0008] In some embodiments, a cavity is formed inside the reinforcement.

[0009] In the above technical solution, by setting a cavity inside the reinforcement, the reinforcement can reduce its own weight while transmitting force to the partition beam, thereby achieving lightweight reinforcement, which is beneficial to reducing the overall weight of the box.

[0010] In some embodiments, a reinforcing rib is disposed in the cavity, and the reinforcing rib is connected to the cavity wall surface of the cavity.

[0011] In the above technical solution, reinforcing ribs interconnected with the cavity wall are arranged inside the reinforcement, thereby achieving lightweight of the reinforcement and improving the structural strength of the reinforcement, and reducing the risk of deformation or damage of the reinforcement during use, so as to ensure the supporting effect of the reinforcement on the partition beam.

[0012] In some embodiments, there are multiple reinforcing ribs, one end of each of the multiple reinforcing ribs is connected to each other, and the other end of each of the multiple reinforcing ribs is connected to the cavity wall surface of the cavity.

[0013] In some embodiments, the reinforcement member is an extruded structure.

[0014] In some embodiments, the box body further includes a bottom plate, the frame body is disposed around the bottom plate, and the reinforcement member is fixedly connected to at least one of the frame body, the partition beam and the bottom plate.

[0015] In the above technical solution, the box body is also provided with a bottom plate, and the frame body is arranged around the bottom plate, so that the bottom plate can play a good supporting role for the battery monomer accommodated in the first accommodation space. In addition, by fixing the reinforcement member to at least one of the frame body, the partition beam and the bottom plate, it is helpful to improve the structural stability of the reinforcement member, thereby effectively improving the transmission effect of the reinforcement member on the force acting on the battery monomer on the partition beam.

[0016] In some embodiments, two sides of the reinforcement member are respectively abutted against and fixedly connected to the frame and the partition beam.

[0017] In the above technical solution, by fixing the two sides of the reinforcement to the frame and the partition beam respectively, on the one hand, the connection reliability of the reinforcement between the frame and the partition beam can be effectively improved to reduce the risk of the reinforcement falling off during later use; on the other hand, the supporting effect of the reinforcement on the partition beam can be effectively improved, which is beneficial to ensure the transmission effect of the reinforcement on the force exerted on the partition beam by the battery cell, thereby further improving the deformation resistance of the partition beam.

[0018] In some embodiments, the reinforcement is made of metal material, and the frame has a connecting portion, which is used for welding with the reinforcement, and the connecting portion is made of metal material.

[0019] In the above technical solution, by welding the connection portion of the frame connected to the reinforcement to the reinforcement, it is beneficial to improve the connection stability and reliability between the reinforcement and the frame, and facilitate the reinforcement to transmit the force of the battery cell.

[0020] In some embodiments, the reinforcement is made of metal material, the partition beam has a connecting wall, the connecting wall is used for welding with the reinforcement, and the connecting wall is made of metal material.

[0021] In the above technical solution, by using the partition beam to weld the connecting wall connected to the reinforcement to each other, it is beneficial to improve the connection stability and reliability between the reinforcement and the partition beam, and can effectively improve the supporting effect of the reinforcement on the partition beam, so as to enhance the ability of the partition beam to resist the displacement or expansion of the battery cell.

[0022] In some embodiments, two sides of the reinforcement are respectively welded to the frame and the partition beam, and the reinforcement, the frame and the partition beam are all made of the same metal material.

[0023] In the above technical solution, by welding the two sides of the reinforcement to the frame and the partition beam respectively, it is helpful to further improve the connection firmness between the reinforcement and the frame and the partition beam. On the one hand, it can further reduce the risk of the reinforcement falling off during use, and on the other hand, it is convenient for the reinforcement to transfer the force of the battery cell on the partition beam to the frame.

[0024] In some embodiments, the frame includes a first plate, the first plate is used to be connected to the reinforcement, and the first plate is arranged at an acute angle to the partition beam.

[0025] In the above technical solution, the frame has a first plate connected to the reinforcement. The first plate is arranged at an acute angle to the partition beam so that a necking area is formed at the position of the first plate, and a triangular area is formed between the partition beam and the first plate. This is beneficial to saving the space occupied by the box on the one hand, and on the other hand, by arranging the reinforcement between the first plate and the partition beam, that is, the reinforcement is arranged in the triangular area formed between the first plate and the partition beam, thereby improving the structural stability among the first plate, the reinforcement and the partition beam, and is beneficial to optimizing the size of the reinforcement to reduce the manufacturing cost of the box.

[0026] In some embodiments, a reinforcement member is disposed between each first plate and the partition beam in the thickness direction of the partition beam.

[0027] In some embodiments, the box body also includes a bottom plate and a box cover. In the first direction, one end of the frame body is connected to the bottom plate, and the other end is enclosed to form an opening for the box cover to cover; the frame body also includes two second plates, a third plate, two fourth plates and a fifth plate. The two second plates are arranged opposite to each other along the second direction, the two fourth plates are arranged opposite to each other along the second direction, the third plate and the fifth plate are arranged opposite to each other along the thickness direction of the partition beam, and a first plate, a second plate, a third plate, another second plate, another first plate, a fourth plate, a fifth plate and another fourth plate are connected end to end in sequence to enclose a frame; the first direction, the thickness direction of the partition beam and the second direction are perpendicular to each other.

[0028] In some embodiments, the box body also includes a bottom plate and a box cover. In the first direction, one end of the frame body is connected to the bottom plate, and the other end is enclosed to form an opening for the box cover to cover; the frame body also includes a fifth plate, and two first plates are respectively connected to the two ends of the fifth plate in the second direction, so that the partition beam, the fifth plate and the two first plates are enclosed to form a second accommodating space of a trapezoidal structure; the first direction, the thickness direction of the partition beam and the second direction are perpendicular to each other.

[0029] In some embodiments, the frame also includes two second plates and a third plate, the two second plates are arranged opposite to each other along the second direction, the third plate and the fifth plate are arranged opposite to each other along the thickness direction of the partition beam, and a first plate, a second plate, a third plate, another second plate, another first plate and the fifth plate are connected end to end in sequence to enclose the frame.

[0030] In some embodiments, the frame also includes two second plates, one end of the two first plates are connected to each other, and the other end is respectively connected to the two second plates, so that the partition beam and the two first plates enclose a second accommodating space of a triangular structure.

[0031] In some embodiments, the reinforcement member is a prism structure, and the first plate and the partition beam are respectively connected to different prism sides of the reinforcement member.

[0032] In the above technical solution, by setting the reinforcement as a prismatic structure, and connecting the first plate and the partition beam to different prism sides of the reinforcement respectively, the box body with such a structure can, on the one hand, facilitate the reinforcement to transmit the force of the battery cell acting on the partition beam to the first plate set at an acute angle to the partition beam, and on the other hand, it can enhance the structural strength of the reinforcement to reduce the risk of deformation of the reinforcement in the process of transmitting the force of the battery cell, thereby ensuring the force transmission effect of the reinforcement on the battery cell.

[0033] In some embodiments, the reinforcement is a right triangular prism structure, and the reinforcement includes a first prism side, a second prism side, and a third prism side connected end to end, the first prism side is used to connect to the first plate, and the second prism side is used to connect to the partition beam; wherein the surface area of ​​the first prism side and the surface area of ​​the second prism side are both greater than the surface area of ​​the third prism side.

[0034] In the above technical solution, by setting the reinforcement as a straight triangular prism structure, and connecting the first prism side surface and the second prism side surface with a larger area among the prism side surfaces of the reinforcement respectively to the first plate material and the partition beam, it is beneficial to increase the contact area between the reinforcement and the first plate material and the partition beam, so as to improve the structural stability among the first plate material, the reinforcement and the partition beam, and further facilitate the partition beam to transmit the force generated by the battery cell to the first plate material of the frame through the reinforcement, which is beneficial to improve the partition beam's resistance to the displacement or expansion of the battery cell.

[0035] In some embodiments, the side surface of the first prism and the surface of the first plate facing the second accommodation space are in contact with each other, and the side surface of the second prism and the surface of the partition beam facing the second accommodation space are in contact with each other.

[0036] In some embodiments, the reinforcement is configured to be welded to the first plate and the separation beam respectively to form a first weld and a second weld, wherein the first weld extends along at least a portion of the outer edge of the first prism side, and the second weld extends along at least a portion of the outer edge of the second prism side.

[0037] In the above technical solution, the reinforcement member and the first plate are welded to form a first weld, and the first weld extends along at least part of the outer edge of the first prism side of the reinforcement member, that is, at least part of the outer edge of the first prism side of the reinforcement member and the first plate are welded to form the first weld. This welding structure is conducive to reducing the welding difficulty between the reinforcement member and the first plate, and can ensure the welding strength between the first plate and the reinforcement member. Similarly, the reinforcement member and the partition beam are welded to form a second weld, and the second weld extends along at least part of the outer edge of the second prism side of the reinforcement member, that is, at least part of the outer edge of the second prism side of the reinforcement member and the partition beam are welded to form the second weld. This welding structure is conducive to reducing the welding difficulty between the reinforcement member and the partition beam, and can ensure the welding strength between the partition beam and the reinforcement member.

[0038] In some embodiments, the box body also includes a bottom plate and a box cover. In a first direction, one end of the frame body is connected to the bottom plate, and the other end is enclosed to form an opening for the box cover to cover; wherein a cavity is formed inside the reinforcement member that passes through both ends of the reinforcement member along the first direction, and the first direction is parallel to the side edge of the reinforcement member.

[0039] In the above technical solution, a cavity extending along the first direction is provided inside the reinforcement, that is, the surface of the reinforcement penetrated by the cavity is different from the surface of the reinforcement used to be respectively connected to the first plate material and the partition beam, thereby ensuring the contact area between the reinforcement and the first plate material and the partition beam while reducing the weight of the reinforcement, thereby reducing the overall weight of the box.

[0040] In some embodiments, the first direction is parallel to a side edge of the reinforcement member.

[0041] In some embodiments, the surface of the reinforcement member penetrated by the cavity is different from the surface of the reinforcement member used for interconnecting with the first sheet material and the separation beam, respectively.

[0042] In some embodiments, the extension direction of the reinforcement is parallel to the thickness direction of the partition beam, and two ends of the reinforcement are respectively connected to the first plate and the partition beam.

[0043] In the above technical solution, by setting the extension direction of the reinforcement to be parallel to the thickness direction of the partition beam, that is, the reinforcement is a structure arranged perpendicular to the partition beam. The box body using this structure can enhance the supporting effect of the reinforcement on the partition beam, so that the reinforcement can transfer the force of the battery cell on the partition beam to the first plate, which is beneficial to enhance the deformation resistance of the partition beam.

[0044] In some embodiments, a cavity is formed inside the reinforcement member and penetrates both ends of the reinforcement member along the thickness direction of the partition beam.

[0045] In the above technical solution, a cavity is provided inside the reinforcement member, which extends along the thickness direction of the partition beam and passes through the two ends of the reinforcement member. That is to say, the extension direction of the cavity is consistent with the extension direction of the reinforcement member, so that the cross-section of the cavity and the partition beam of the reinforcement member are interconnected. The reinforcement member with such a structure can, on the one hand, reduce the weight of the reinforcement member itself to achieve lightweight of the box body; on the other hand, it is beneficial for the reinforcement member to transfer the force of the battery cell exerted on the partition beam to the first plate member, and can effectively reduce the deformation of the reinforcement member.

[0046] In some embodiments, the length of the frame along the thickness direction of the partition beam is L 1 , meet, 900mm≤L 1 ≤2800mm.

[0047] In some embodiments, the length of the separator beam is L 2 , meet, 500mm≤L 2 ≤1700mm.

[0048] In a second aspect, an embodiment of the present application further provides a battery, comprising a battery cell and the above-mentioned box body; the battery cell is accommodated in a first accommodation space.

[0049] In some embodiments, along the thickness direction of the separation beam, a projection of the reinforcement member at least partially coincides with a projection of the battery cell.

[0050] In the above technical solution, by setting the projection of the reinforcement in the thickness direction of the partition beam to overlap with at least part of the projection of the battery cell, the reinforcement is arranged corresponding to at least part of the battery cell in the thickness direction of the partition beam, so that the reinforcement can support and reinforce the area of ​​the partition beam for the battery cell to displace or expand, which is beneficial to further enhance the effect of the partition beam in resisting the displacement or expansion of the battery cell, and makes it easy for the reinforcement to transmit the force of the battery cell on the partition beam to the frame, which is beneficial to alleviate the deformation of the partition beam.

[0051] In some embodiments, the battery cell has a first surface, which is a surface with the largest area among the outer surfaces of the battery cell, and the first surface is disposed facing the separation beam.

[0052] In the above technical solution, the first surface with the largest area on the outer surface of the battery cell is arranged to face the partition beam, that is, the surface of the battery cell that expands the largest during use is arranged to face the partition beam, so that the partition beam can better restrain the expansion of the battery cell, thereby reducing the risk of fire and explosion caused by excessive expansion and deformation of the battery cell during use.

[0053] In some embodiments, the battery cell includes an electrode assembly of a wound structure, the winding axis of the electrode assembly is perpendicular to the thickness direction of the separation beam, and the size of the electrode assembly in the thickness direction of the separation beam is smaller than the size of the electrode assembly in other directions perpendicular to the winding axis of the electrode assembly.

[0054] In the above technical solution, the winding axis of the electrode assembly inside the battery cell is arranged perpendicular to the thickness direction of the partition beam, and the size of the electrode assembly in the thickness direction of the partition beam is the smallest, that is, the electrode assembly of the wound structure is flat, and the thickness direction of the flat area of ​​the electrode assembly is consistent with the thickness direction of the partition beam. The battery adopting this structure can have a better restraining effect on the direction in which the expansion size of the battery cell is the largest through the partition beam, so as to reduce the expansion and deformation phenomenon of the battery cell with the electrode assembly of the wound structure.

[0055] In some embodiments, the battery cell includes an electrode assembly, the electrode assembly is flat, and a thickness direction of a flat region of the electrode assembly is consistent with a thickness direction of the separation beam.

[0056] In some embodiments, the battery cell includes an electrode assembly of a laminated structure, and a stacking direction of the electrode assembly is parallel to a thickness direction of the separation beam.

[0057] In the above technical solution, by setting the stacking method of the electrode assembly inside the battery cell to be consistent with the thickness direction of the partition beam, the battery using this structure can have a better restraining effect on the direction of the maximum expansion size of the battery cell through the partition beam, so as to alleviate the phenomenon of expansion and deformation of the battery cell with an electrode assembly having a stacked structure.

[0058] In some embodiments, along the thickness direction of the separation beam, the thickness of the battery cell is L 3 , meet, 5mm≤L 3 ≤40mm.

[0059] In some embodiments, along the extension direction of the partition beam, the length of the battery cell is L 4 , meet, 400mm≤L 4 ≤2500mm.

[0060] In some embodiments, the battery cell is a cylindrical structure, and the axis direction of the battery cell is perpendicular to the thickness direction of the separation beam.

[0061] In the above technical solution, the battery cell arranged in the battery box is a cylindrical structure. By setting the axial direction of the battery cell to be consistent with the thickness direction of the partition beam, that is, the outer peripheral surface of the battery cell is arranged to face the partition beam. The battery adopting this structure can have a better restraining effect on the direction in which the expansion size of the battery cell is the largest through the partition beam.

[0062] In some embodiments, there are a plurality of battery cells, and the plurality of battery cells are stacked along a thickness direction of the separation beam.

[0063] In the above technical solution, by stacking multiple battery cells arranged in the box body along the thickness direction of the partition beam, the partition beam can limit the direction of the maximum expansion size of the multiple battery cells, and can simultaneously limit the expansion of multiple battery cells, thereby alleviating the risk of expansion and deformation of multiple battery cells of the battery, which is beneficial to improving the service life and safety of the battery.

[0064] In some embodiments, the battery includes two rows of battery cells arranged along a second direction, each row of battery cells includes a plurality of battery cells stacked along a thickness direction of the separation beam, and the second direction is perpendicular to the thickness direction of the separation beam.

[0065] In a third aspect, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery, and the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0067] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0068] Figure 2 An exploded view of the structure of a battery provided in some embodiments of the present application;

[0069] Figure 3 A schematic diagram of the structure of a box provided in some embodiments of the present application;

[0070] Figure 4 for Figure 3 A partial enlarged view of the box body at A shown;

[0071] Figure 5 A schematic diagram of the structure of a reinforcement member of a box provided in some embodiments of the present application;

[0072] Figure 6 A schematic diagram of the structure of the reinforcement member of the box provided in some embodiments of the present application in other embodiments;

[0073] Figure 7 A partial cross-sectional view of a box provided in some embodiments of the present application;

[0074] Figure 8 A schematic diagram of a partial structure of a box provided in some embodiments of the present application;

[0075] Fig. 9 A schematic diagram of the structure of a reinforcement member of a box provided in some other embodiments of the present application;

[0076] Fig.10 A partial cross-sectional view of a box provided in some further embodiments of the present application.

[0077] Icons: 1000-vehicle; 100-battery; 10-casing; 11-frame; 111-first plate; 112-second plate; 113-third plate; 114-fourth plate; 115-fifth plate; 12-partition beam; 13-reinforcement; 131-cavity; 132-reinforcement rib; 133-first prism side; 134-second prism side; 135-third prism side; 136-first end face; 137-second end face; 14-first accommodating space; 15-second accommodating space; 16-bottom plate; 20-battery cell; 21-first surface; 30-casing cover; 200-controller; 300-motor; X-first direction; Y-thickness direction of the partition beam; Z-second direction. DETAILED DESCRIPTION

[0078] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0079] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application 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 drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0080] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places 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.

[0081] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0082] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can 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 application generally indicates that the associated objects before and after are in an "or" relationship.

[0083] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0084] The term "plurality" used in the present application refers to two or more (including two).

[0085] In the present application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0086] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells or multiple battery modules. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0087] The battery cell includes a shell, an electrode assembly and an electrolyte, and the electrode assembly and the electrolyte are both contained in the shell. The electrode assembly can be a wound structure formed by winding a positive electrode sheet, a negative electrode sheet and a separator, or a laminated structure formed by stacking a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector. The part of the positive current collector that is not coated with the positive active material layer serves as a positive electrode ear to realize the input or output of electrical energy of the positive electrode sheet through the positive electrode ear. Taking lithium-ion batteries as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The part of the negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab, so as to realize the input or output of electric energy of the negative electrode sheet through the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0088] The material of the isolation film may be polypropylene (PP) or polyethylene (PE), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0089] Batteries have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and low self-discharge coefficient. They are an important part of the development of new energy today. Batteries are usually composed of a box and multiple battery cells stacked in the box. However, with the continuous development of battery technology, higher requirements are also put forward for the battery's endurance, especially in terms of battery energy density and weight.

[0090] The inventors have found that for general batteries, multiple battery cells stacked in a battery box will expand in the stacking direction during the cycle use process, which can easily lead to the risk of fire and explosion of the battery cells due to expansion and deformation, which is not conducive to the safety and service life of the battery. In order to solve the problem of battery cells expanding and deforming during the cycle use, in the prior art, a crossbeam is usually set on one side of the multiple battery cells in the stacking direction so that the multiple battery cells and the crossbeam abut against each other, so that the expansion of the battery cells can be limited to a certain extent through the crossbeam. At the same time, the thickness of the crossbeam is increased or reinforcing ribs are set inside the crossbeam to improve the structural strength of the crossbeam, so as to reduce the risk of deformation of the crossbeam, thereby effectively improving the ability of the crossbeam to resist the expansion of the battery cells, so as to reduce the risk of deformation of the battery cells due to expansion during use. However, in a battery with this structure, the crossbeam is prone to deformation, which makes the crossbeam less effective in resisting the expansion of the battery cells, resulting in a large safety hazard during the use of the battery. Increasing the thickness of the crossbeam or providing reinforcing ribs inside the crossbeam will cause the internal space of the battery to be occupied, thereby further increasing the weight of the battery, which is not conducive to improving the energy density of the battery and achieving battery lightweighting.

[0091] Based on the above considerations, in order to solve the problems of battery safety and low internal space utilization, the inventors have designed a box after in-depth research, which includes a frame, a partition beam and a reinforcement. The frame forms a storage space, the partition beam is arranged in the frame, and the partition beam is configured to divide the storage space into a first storage space and a second storage space, and the first storage space is used to accommodate battery cells. The reinforcement is arranged in the second storage space, the reinforcement is arranged between the partition beam and the frame, and the reinforcement is used to transmit force between the partition beam and the frame.

[0092] In a box of this structure, a partition beam is provided in the storage space of the frame, which can divide the storage space into a first storage space for accommodating battery cells and a second storage space for accommodating other battery components, so that the partition beam can limit the displacement of the battery cells or the expansion that occurs during use. By arranging a reinforcement in the second accommodating space and arranging the reinforcement between the frame and the partition beam, the reinforcement can provide support for the partition beam without occupying the space for placing the battery cell. When the battery cell accommodated in the first accommodating space is displaced or expanded, the force exerted by the battery cell on the partition beam can be transmitted to the frame through the reinforcement, thereby effectively improving the deformation resistance of the partition beam under the extrusion of the battery cell. On the one hand, the box body with this structure can effectively alleviate the deformation of the partition beam, which is beneficial to improving the effect of the partition beam in resisting the displacement or expansion of the battery cell, so as to reduce the risk of fire and explosion of the battery cell due to displacement, collision or expansion deformation, thereby improving the service life and safety of the battery with this box body. On the other hand, it can reduce the design requirements of the partition beam to resist the displacement or expansion of the battery cell. That is to say, it can reduce the structural strength of the partition beam itself, thereby simplifying the structural design of the partition beam to reduce the weight and volume of the partition beam, which is beneficial to improving the internal space utilization rate of the battery with this box body and achieving lightweight batteries.

[0093] The box disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system comprising the box disclosed in the present application, batteries, etc., which is conducive to improving the internal space utilization of the battery and achieving the lightweight of the battery, thereby effectively improving the battery's endurance.

[0094] 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.

[0095] 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.

[0096] Please refer to Figure 1 , Figure 1A 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.

[0097] 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.

[0098] Please refer to Figure 2 , Figure 2 The exploded view of the structure of the battery 100 provided in some embodiments of the present application. The battery 100 comprises a box body 10, a battery cell 20 and a box cover 30, wherein the battery cell 20 is used to be accommodated in the box body 10, and the box cover 30 covers the box body 10.

[0099] The box 10 is used to provide an assembly space for the battery cell 20. The battery 100 can adopt a variety of structures. Figure 2 As shown, along the first direction X, the box body 10 is a hollow structure with one side open, and the box cover 30 is a plate-like structure, and the box cover 30 covers the open side of the box body 10, so that the box body 10 and the box cover 30 together define a closed space for accommodating the battery cell 20. In some embodiments, the battery 100 can also be other structures, for example, the battery 100 includes two box covers 30, along the first direction X, the box body 10 is a hollow structure with two sides open, and the two box covers 30 cover the two sides of the box body 10 in the first direction X, respectively. Of course, the box body 10 and the box cover 30 of the battery 100 can also be hollow structures with one side open, and the open side of the box cover 30 covers the open side of the box body 10, so that the box body 10 and the box cover 30 together define a closed space for accommodating the battery cell 20. Of course, the battery 100 formed by the assembly of the box body 10 and the box cover 30 can be in various shapes, such as a cylinder, a cuboid, etc.

[0100] 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.

[0101] For example, in Figure 2 In the embodiment, a plurality of battery cells 20 are stacked in a box body 10 .

[0102] Each battery cell 20 may be a secondary battery or a primary battery; it may also be 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. Figure 2 In the figure, the battery cell 20 is a rectangular parallelepiped structure.

[0103] According to some embodiments of the present application, referring to Figure 2 , and please refer to Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of the box 10 provided in some embodiments of the present application. Figure 4 for Figure 3 A partial enlarged view of the A of the box body 10 shown. The present application provides a box body 10, which includes a frame body 11, a partition beam 12 and a reinforcement member 13. The frame body 11 forms a storage space, and the partition beam 12 is arranged in the frame body 11. The partition beam 12 is configured to divide the storage space into a first storage space 14 and a second storage space 15. The first storage space 14 is used to store battery cells 20. The reinforcement member 13 is arranged in the second storage space 15. The reinforcement member 13 is arranged between the partition beam 12 and the frame body 11. The reinforcement member 13 is used to transmit force between the partition beam 12 and the frame body 11.

[0104] Among them, the reinforcement 13 is used to transfer force between the partition beam 12 and the frame 11, that is, the reinforcement 13 is used to transfer the extrusion force acting on the partition beam 12 when the battery cell 20 is displaced or expanded along the thickness direction Y of the partition beam to the frame 11, so as to achieve the supporting effect on the partition beam 12.

[0105] The box 10 may further include a bottom plate 16, and the frame 11 is disposed around the bottom plate 16. The frame 11 encloses a receiving space, and the bottom plate 16 is used to support and place the battery cell 20. In the first direction X, one end of the frame 11 is connected to the bottom plate 16, and the other end encloses an opening for the box cover 30 to cover.

[0106] exist Figure 3 In the embodiment, the partition beam 12 extends along the second direction Z, and the partition beam 12 is disposed in the accommodation space, so that the partition beam 12 divides the accommodation space of the frame body 11 into a first accommodation space 14 and a second accommodation space 15 arranged along the thickness direction Y of the partition beam, and the second accommodation space 15 is used to accommodate other electronic components such as the battery management system of the battery 100. The first direction X, the thickness direction Y of the partition beam, and the second direction Z are perpendicular to each other.

[0107] Optionally, the partition beam 12 can be connected in various ways, such as a structure in which both ends of the partition beam 12 in the second direction Z are connected to the frame 11 , or a structure in which one side of the partition beam 12 in the first direction X is connected to the bottom plate 16 .

[0108] The reinforcement 13 is arranged between the partition beam 12 and the frame 11, and the reinforcement 13 is configured to transfer the expansion force of the battery cell 20 acting on the partition beam 12 to the frame 11. That is to say, the reinforcement 13 plays the role of supporting the partition beam 12, so that the reinforcement 13 can transfer the expansion force of the battery cell 20 acting on the partition beam 12 due to expansion during use to the frame 11.

[0109] The connection structure between the reinforcement member 13 and the partition beam 12 can be various, for example, Figure 3 In the embodiment, the reinforcement 13 and the partition beam 12 abut against each other, so that the reinforcement 13 can directly support the partition beam 12, thereby transmitting the expansion force of the battery cell 20 on the partition beam 12 to the frame 11. Of course, in some embodiments, the reinforcement 13 can also be set with a gap in the thickness direction Y of the partition beam 12, that is, the reinforcement 13 and the partition beam 12 do not abut against each other, so that the partition beam 12 can abut against the reinforcement 13 after being deformed under the expansion force of the battery cell 20, so that the reinforcement 13 can support the partition beam 12.

[0110] It should be noted that the structure formed by the frame 11 can be various, such as a triangular structure, a rectangular structure, a polygonal structure or a special-shaped structure. Figure 3 In the embodiment, the frame 11 is a special-shaped structure formed by connecting a plurality of plates end to end in sequence.

[0111] A partition beam 12 is provided in the storage space of the frame 11. The partition beam 12 can separate the storage space into a first storage space 14 for storing battery cells 20 and a second storage space 15 for storing other components of the battery 100, so that the partition beam 12 can limit the displacement of the battery cells 20 or the expansion that occurs during use. By providing a reinforcement member 13 in the second storage space 15 and providing the reinforcement member 13 between the frame 11 and the partition beam 12, so that the reinforcement member 13 can provide support for the partition beam 12 and does not occupy the space for placing the battery cells 20, when the battery cells 20 stored in the first storage space 14 are displaced or expanded, the force of the battery cells 20 acting on the partition beam 12 can be transmitted to the frame 11 through the reinforcement member 13, thereby effectively improving the anti-deformation ability of the partition beam 12 under the extrusion of the battery cells 20. The box 10 with such a structure can effectively alleviate the deformation of the partition beam 12, which is beneficial. The effect of improving the partition beam 12 in resisting the displacement or expansion of the battery cell 20 can be reduced, so as to reduce the risk of fire and explosion caused by displacement, collision or expansion deformation of the battery cell 20, thereby improving the service life and safety of the battery 100 having such a box 10. On the other hand, the design requirements of the partition beam 12 for resisting the displacement or expansion of the battery cell 20 can be reduced, that is, the structural strength of the partition beam 12 itself can be reduced, and then the structural design of the partition beam 12 can be simplified to reduce the weight and volume of the partition beam 12, which is beneficial to improving the internal space utilization rate of the battery 100 having such a box 10 and achieving lightweight of the battery 100.

[0112] In some embodiments, reference Figure 4 , and please refer to Figure 5 , Figure 5 The structure diagram of the reinforcement member 13 of the box body 10 provided in some embodiments of the present application is shown in FIG. A cavity 131 is formed inside the reinforcement member 13 .

[0113] Exemplarily, the cavity 131 passes through both ends of the reinforcement member 13 along the first direction X. Of course, in other embodiments, the cavity 131 may also be formed inside the reinforcement member 13, that is, the cavity 131 does not pass through the reinforcement member 13. Similarly, the cavity 131 may also pass through both ends of the reinforcement member 13 along the thickness direction of the partition.

[0114] By providing the cavity 131 inside the reinforcement 13 , the reinforcement 13 can reduce its own weight while transmitting force to the partition beam 12 , thereby achieving lightweight reinforcement 13 , which is beneficial to reducing the overall weight of the box body 10 .

[0115] In some embodiments, please refer to Figure 6 , Figure 6The structural diagram of the reinforcement member 13 of the box body 10 provided in some embodiments of the present application in other embodiments. A reinforcement rib 132 is arranged in the cavity 131 , and the reinforcement rib 132 is connected to the cavity wall surface of the cavity 131 .

[0116] The number of reinforcing ribs 132 disposed in the cavity 131 may be one or more. Figure 6 In the embodiment, there are three reinforcing ribs 132 disposed in the cavity 131, and one end of the three reinforcing ribs 132 is connected to each other, and the other end is connected to the cavity wall of the cavity 131. Of course, in other embodiments, there may be one, two, four or five reinforcing ribs 132 disposed in the cavity 131.

[0117] By arranging reinforcing ribs 132 interconnected with the wall surface of the cavity 131 inside the reinforcement 13, it is beneficial to improve the structural strength of the reinforcement 13 while achieving lightweight of the reinforcement 13, and it is beneficial to reduce the risk of deformation or damage of the reinforcement 13 during use, so as to ensure the supporting effect of the reinforcement 13 on the partition beam 12.

[0118] According to some embodiments of the present application, the reinforcement member 13 is made by an extrusion molding process. The manufacturing method of the extrusion molding process can be referred to in the relevant art and will not be described in detail here.

[0119] It should be noted that, in other embodiments, the reinforcement member 13 may also be made by stamping, casting or other processes.

[0120] Producing the reinforcement 13 through an extrusion molding process facilitates the molding of the reinforcement 13 , helps reduce the manufacturing difficulty of the reinforcement 13 , and helps improve the mechanical properties of the reinforcement 13 to effectively transmit the force of the battery cell 20 acting on the partition beam 12 .

[0121] According to some embodiments of this application, see Figure 3 and Figure 4 As shown, the box body 10 further includes a bottom plate 16 , the frame body 11 is disposed around the bottom plate 16 , and the reinforcement member 13 is fixedly connected to at least one of the frame body 11 , the partition beam 12 and the bottom plate 16 .

[0122] Among them, the reinforcement 13 is fixedly connected to at least one of the frame 11, the partition beam 12 and the bottom plate 16, that is, the reinforcement 13 can be connected to one of the frame 11, the partition beam 12 and the bottom plate 16, or connected to two of the frame 11, the partition beam 12 and the bottom plate 16, or connected to all of the frame 11, the partition beam 12 and the bottom plate 16.

[0123] The box body 10 is also provided with a bottom plate 16, and the frame body 11 is arranged around the bottom plate 16, so that the bottom plate 16 can play a good supporting role for the battery cell 20 accommodated in the first accommodation space 14. In addition, by fixing the reinforcement member 13 to at least one of the frame body 11, the partition beam 12 and the bottom plate 16, it is helpful to improve the structural stability of the reinforcement member 13, thereby effectively improving the transmission effect of the reinforcement member 13 on the force exerted by the battery cell 20 on the partition beam 12.

[0124] According to some embodiments of the present application, see Figure 4 As shown, two sides of the reinforcement member 13 are respectively abutted against and fixedly connected to the frame 11 and the partition beam 12 .

[0125] Optionally, the reinforcement member 13 may be fixedly connected to the frame 11 and the partition beam 12 in a variety of ways, such as welding, bonding, or bolting, etc. For example, in the embodiment of the present application, the two sides of the reinforcement member 13 are welded to the frame 11 and the partition beam 12, respectively.

[0126] By fixing the two sides of the reinforcement 13 to the frame 11 and the partition beam 12 respectively, on the one hand, the connection reliability of the reinforcement 13 between the frame 11 and the partition beam 12 can be effectively improved to reduce the risk of the reinforcement 13 falling off during later use; on the other hand, the supporting effect of the reinforcement 13 on the partition beam 12 can be effectively improved, which is beneficial to ensure the transmission effect of the reinforcement 13 on the force exerted by the battery cell 20 on the partition beam 12, thereby further improving the deformation resistance of the partition beam 12.

[0127] In some embodiments, the reinforcement member 13 is made of metal material, and the frame 11 has a connecting portion, which is used for welding with the reinforcement member 13 and is made of metal material.

[0128] The frame body 11 has a connecting portion, that is, a region of the frame body 11 used for welding with the reinforcement member 13 is the connecting portion.

[0129] Exemplarily, the reinforcement member 13 and the connection portion may be made of steel, iron, aluminum or copper.

[0130] By welding the connection portion of the frame 11 connected to the reinforcement 13 to the reinforcement 13 , the connection stability and reliability between the reinforcement 13 and the frame 11 are improved, and the reinforcement 13 is convenient for transmitting the force of the battery cell 20 .

[0131] In some embodiments, the reinforcement member 13 is made of metal material, and the partition beam 12 has a connecting wall, which is used for welding with the reinforcement member 13 and is made of metal material.

[0132] The partition beam 12 has a connecting wall, that is, the wall surface of the partition beam 12 used for welding with the reinforcement member 13 is the connecting wall.

[0133] Exemplarily, the reinforcement member 13 and the connecting wall may be made of steel, iron, aluminum or copper.

[0134] By welding the connecting wall connected to the reinforcement 13 by using the partition beam 12, it is beneficial to improve the connection stability and reliability between the reinforcement 13 and the partition beam 12, and can effectively improve the supporting effect of the reinforcement 13 on the partition beam 12, so as to enhance the ability of the partition beam 12 to resist the displacement or expansion of the battery cell 20.

[0135] According to some embodiments of the present application, see Figure 4 As shown, two sides of the reinforcement member 13 are respectively welded to the frame 11 and the partition beam 12 , and the reinforcement member 13 , the frame 11 and the partition beam 12 are all made of the same metal material.

[0136] Exemplarily, the reinforcement 13 , the frame 11 and the partition beam 12 may all be made of steel, iron, aluminum or copper.

[0137] By welding the two sides of the reinforcement 13 to the frame 11 and the partition beam 12 respectively, it is helpful to further improve the connection firmness between the reinforcement 13 and the frame 11 and the partition beam 12. On the one hand, it can further reduce the risk of the reinforcement 13 falling off during use. On the other hand, it is convenient for the reinforcement 13 to transfer the force exerted by the battery cell 20 on the partition beam 12 to the frame 11.

[0138] According to some embodiments of this application, see Figure 3 and Figure 4 The frame 11 includes a first plate 111 , which is used to be connected to the reinforcement 13 , and the first plate 111 is arranged at an acute angle to the partition beam 12 .

[0139] The frame 11 is a structure formed by connecting a plurality of plates end to end in sequence, and the first plate 111 is a plate used to connect the frame 11 to the reinforcement member 13 .

[0140] For example, in Figure 3 In the figure, the frame 11 may include two first plates 111, the two first plates 111 are arranged relatively to each other along the second direction Z, and the two first plates 111 are arranged at an acute angle to the partition beam 12, and in the thickness direction Y of the partition beam, each first plate 111 is provided with a reinforcement 13 between the partition beam 12, thereby facilitating further enhancing the ability of the partition beam 12 to resist the expansion of the battery cell 20.

[0141] In some embodiments, see Figure 3As shown, the frame 11 may also include two second plates 112, a third plate 113, two fourth plates 114 and a fifth plate 115. The two second plates 112 are arranged oppositely along the second direction Z, the two fourth plates 114 are arranged oppositely along the second direction Z, and the third plate 113 and the fifth plate 115 are arranged oppositely along the thickness direction Y of the partition beam. A first plate 111, a second plate 112, a third plate 113, another second plate 112, another first plate 111, a fourth plate 114, a fifth plate 115 and another fourth plate 114 are connected end to end in sequence to enclose the frame 11. Among them, the two ends of the partition beam 12 in the second direction Z are respectively connected to the two second plates 112, and the length of the third plate 113 in the second direction Z is greater than the length of the fifth plate 115 in the second direction Z, so that the frame 11 forms a necking area at the position where the first plate 111 is located.

[0142] Of course, in other embodiments, the structure of the frame 11 can be various. For example, the frame 11 may not include the two fourth plates 114, and the two first plates 111 are respectively connected to the two ends of the fifth plate 115 in the second direction Z, so that the partition beam 12, the fifth plate 115 and the two first plates 111 enclose a second accommodation space 15 of a trapezoidal structure. Similarly, the frame 11 may not include the fifth plate 115 and the two fourth plates 114, and one end of the two first plates 111 is connected to each other, and the other end is respectively connected to the two second plates 112, so that the partition beam 12 and the two first plates 111 enclose a second accommodation space 15 of a triangular structure.

[0143] The frame 11 has a first plate 111 connected to the reinforcement 13. The first plate 111 and the partition beam 12 are arranged at an acute angle so that the box 10 forms a necking area at the position of the first plate 111, and a triangular area is formed between the partition beam 12 and the first plate 111. This is beneficial to saving the occupied space of the box 10 on the one hand, and on the other hand, by arranging the reinforcement 13 between the first plate 111 and the partition beam 12, that is, the reinforcement 13 is arranged in the triangular area formed between the first plate 111 and the partition beam 12, thereby improving the structural stability among the first plate 111, the reinforcement 13 and the partition beam 12, and is beneficial to optimizing the size of the reinforcement 13 to reduce the manufacturing cost of the box 10.

[0144] According to some embodiments of the present application, see Figure 4 As shown, the reinforcement member 13 is a prism structure, and the first plate 111 and the partition beam 12 are respectively connected to different prism sides of the reinforcement member 13 .

[0145] The prism side surface is a surface formed between two adjacent edges in the circumferential direction of the reinforcement member 13 .

[0146] Optionally, the reinforcing member 13 may be a straight prism structure or an oblique prism structure. Of course, the reinforcing member 13 may also have three, four, five or six side edges. Figure 4 In the embodiment, the reinforcement member 13 is a straight triangular prism structure.

[0147] By setting the reinforcement 13 as a prismatic structure and connecting the first plate 111 and the partition beam 12 to different prismatic sides of the reinforcement 13 respectively, the box body 10 adopting such a structure can, on the one hand, facilitate the reinforcement 13 to transmit the force of the battery cell 20 on the partition beam 12 to the first plate 111 set at an acute angle to the partition beam 12; on the other hand, it can enhance the structural strength of the reinforcement 13 to reduce the risk of deformation of the reinforcement 13 in the process of transmitting the force of the battery cell 20, thereby ensuring the force transmission effect of the reinforcement 13 on the battery cell 20.

[0148] In some embodiments, reference Figure 4 and Figure 5 , and please refer to Figure 7 , Figure 7 It is a partial cross-sectional view of the box body 10 provided in some embodiments of the present application. The reinforcement member 13 is a straight triangular prism structure, and the reinforcement member 13 includes a first prism side 133, a second prism side 134 and a third prism side 135 connected end to end in sequence, the first prism side 133 is used to connect to the first plate 111, and the second prism side 134 is used to connect to the partition beam 12. The surface area of ​​the first prism side 133 and the surface area of ​​the second prism side 134 are both greater than the surface area of ​​the third prism side 135.

[0149] The reinforcement member 13 includes a first prism side surface 133, a second prism side surface 134 and a third prism side surface 135 which are connected end to end in sequence, that is, the first prism side surface 133, the second prism side surface 134 and the third prism side surface 135 enclose the outer peripheral surface of the reinforcement member 13. The first prism side surface 133 is connected to the surface of the first plate 111 facing the second accommodation space 15, and the second prism side surface 134 is connected to the surface of the partition beam 12 facing the second accommodation space 15.

[0150] For example, in Figure 7 In the embodiment, the first prism side surface 133 and the surface of the first plate 111 facing the second accommodation space 15 are in contact with each other, and the second prism side surface 134 and the surface of the partition beam 12 facing the second accommodation space 15 are in contact with each other.

[0151] By setting the reinforcement 13 as a right triangular prism structure, and connecting the first prism side 133 and the second prism side 134 with larger areas in the prism side of the reinforcement 13 to the first plate 111 and the partition beam 12 respectively, it is helpful to increase the contact area between the reinforcement 13 and the first plate 111 and the partition beam 12, so as to improve the structural stability among the first plate 111, the reinforcement 13 and the partition beam 12, and then facilitate the partition beam 12 to transmit the force generated by the battery cell 20 to the first plate 111 of the frame 11 through the reinforcement 13, which is helpful to improve the resistance of the partition beam 12 to the displacement or expansion of the battery cell 20.

[0152] According to some embodiments of the present application, the reinforcement 13 is configured to be welded to the first plate 111 and the partition beam 12 respectively to form a first weld and a second weld, wherein the first weld extends along at least a portion of the outer edge of the first prism side 133 , and the second weld extends along at least a portion of the outer edge of the second prism side 134 .

[0153] The first weld extends along at least a portion of the outer edge of the first prism side surface 133 , that is, at least a portion of the outer edge of the first prism side surface 133 of the reinforcement 13 and the first plate 111 are welded to form the first weld.

[0154] The second weld extends along at least a portion of the outer edge of the second prism side surface 134 , that is, at least a portion of the outer edge of the second prism side surface 134 of the reinforcement 13 and the partition beam 12 are welded to each other to form the second weld.

[0155] It should be noted that, in other embodiments, the first plate 111 and the first prism side surface 133 of the reinforcement 13 and the partition beam 12 and the second prism side surface 134 of the reinforcement 13 may also be connected by bonding.

[0156] By welding the reinforcement 13 and the first plate 111 to each other and forming a first weld, and the first weld extends along at least a portion of the outer edge of the first prism side 133 of the reinforcement 13, the use of such a welding structure is conducive to reducing the welding difficulty between the reinforcement 13 and the first plate 111, and can ensure the welding strength between the first plate 111 and the reinforcement 13. Similarly, by welding the reinforcement 13 and the partition beam 12 to each other and forming a second weld, and the second weld extends along at least a portion of the outer edge of the second prism side 134 of the reinforcement 13, the use of such a welding structure is conducive to reducing the welding difficulty between the reinforcement 13 and the partition beam 12, and can ensure the welding strength between the partition beam 12 and the reinforcement 13.

[0157] In the embodiment where the reinforcement member 13 is a prismatic structure, see Figure 4 and Figure 5As shown, a cavity 131 is formed inside the reinforcement member 13 and passes through two ends of the reinforcement member 13 along a first direction X, and the first direction X is parallel to the side edges of the reinforcement member 13 .

[0158] A cavity 131 is formed inside the reinforcement member 13 and passes through both ends of the reinforcement member 13 along the first direction X, that is, the cavity 131 passes through both ends of the reinforcement member 13 along the extending direction of the side edges of the reinforcement member 13 .

[0159] By providing a cavity 131 extending along the first direction X inside the reinforcement 13, that is, the surface of the reinforcement 13 penetrated by the cavity 131 is different from the surface of the reinforcement 13 used to be respectively connected to the first plate 111 and the partition beam 12, thereby ensuring the contact area between the reinforcement 13 and the first plate 111 and the partition beam 12 while reducing the weight of the reinforcement 13, thereby reducing the overall weight of the box body 10.

[0160] According to some embodiments of this application, please refer to Figure 8 , Fig. 9 and Fig.10 , Figure 8 This is a partial structural diagram of a box 10 provided in some embodiments of the present application. Fig. 9 This is a schematic diagram of the structure of the reinforcement member 13 of the box body 10 provided in some other embodiments of the present application. Fig.10 It is a partial cross-sectional view of the box body 10 provided in some other embodiments of the present application. The extension direction of the reinforcement member 13 is parallel to the thickness direction Y of the partition beam, and the two ends of the reinforcement member 13 are respectively connected to the first plate 111 and the partition beam 12.

[0161] The extending direction of the reinforcement member 13 is parallel to the thickness direction Y of the partition beam, that is, the reinforcement member 13 and the partition beam 12 are perpendicular to each other.

[0162] In some embodiments, see Fig. 9 and Fig.10 As shown, along the thickness direction Y of the partition beam, the two ends of the reinforcement member 13 are respectively formed with a first end face 136 and a second end face 137, the first end face 136 and the surface of the first plate 111 facing the second accommodation space 15 are mutually abutted, and the second end face 137 and the surface of the partition beam 12 facing the second accommodation space 15 are mutually abutted. The reinforcement member 13 with such a structure can increase the contact area between the reinforcement member 13 and the first plate 111 and the partition beam 12, so as to improve the overall structural stability of the box body 10, and on the other hand, it is beneficial for the partition beam 12 to transmit the expansion force generated by the expansion of the battery cell 20 to the first plate 111 through the reinforcement member 13.

[0163] By setting the extension direction of the reinforcement 13 to be parallel to the thickness direction Y of the partition beam, that is, the reinforcement 13 is a structure that is arranged perpendicular to the partition beam 12, the box body 10 using this structure can enhance the supporting effect of the reinforcement 13 on the partition beam 12, so that the reinforcement 13 can transfer the force exerted by the battery cell 20 on the partition beam 12 to the first plate 111, which is beneficial to enhance the deformation resistance of the partition beam 12.

[0164] In some embodiments, see Fig. 9 and Fig.10 As shown, a cavity 131 is formed inside the reinforcement member 13 and passes through both ends of the reinforcement member 13 along the thickness direction Y of the partition beam.

[0165] In the above description, the cavity 131 passes through both ends of the reinforcement member 13 in the thickness direction Y of the partition beam, that is, the cavity 131 extends along the thickness direction Y of the partition beam, and both ends of the cavity 131 pass through the first end surface 136 and the second end surface 137 respectively.

[0166] By setting a cavity 131 inside the reinforcement 13 that extends along the thickness direction Y of the partition beam and passes through the two ends of the reinforcement 13, that is, the extension direction of the cavity 131 is consistent with the extension direction of the reinforcement 13, so that the reinforcement 13 is connected to the partition beam 12 in the cross section of the cavity 131. The reinforcement 13 with such a structure can, on the one hand, reduce its own weight to achieve lightweight box body 10, and on the other hand, it is beneficial for the reinforcement 13 to transfer the force of the battery cell 20 exerted on the partition beam 12 to the first plate 111, and can effectively reduce the deformation of the reinforcement 13.

[0167] According to some embodiments of the present application, see Figure 3 As shown, along the thickness direction Y of the partition beam, the length of the frame 11 is L 1 , meet, 900mm≤L 1 ≤2800mm.

[0168] Among them, the length of the frame 11 is L 1 , that is, the maximum dimension of the frame 11 in the thickness direction Y of the partition beam is between 900 mm and 2800 mm.

[0169] Exemplarily, the length of the frame 11 in the thickness direction Y of the partition beam may be 900 mm, 1000 mm, 1200 mm, 1500 mm, 2000 mm, 2500 mm or 2800 mm, etc.

[0170] According to some embodiments of this application, please continue to refer to Figure 3 As shown, the length of the partition beam 12 is L 2 , meet, 500mm≤L2 ≤1700mm.

[0171] The partition beam 12 extends along the second direction Z, and the length of the partition beam 12 is L. 2 , that is, the maximum dimension of the partition beam 12 in the second direction Z is between 500 mm and 1700 mm.

[0172] For example, the length of the partition beam 12 in the second direction Z may be 500 mm, 600 mm, 800 mm, 1000 mm, 1200 mm, 1500 mm or 1700 mm, etc.

[0173] According to some embodiments of the present application, see Figure 2 and Figure 3 As shown, the embodiment of the present application further provides a battery 100 , which includes a battery cell 20 and a box body 10 of any of the above solutions, and the battery cell 20 is accommodated in a first accommodation space 14 .

[0174] In some embodiments, along the thickness direction Y of the separation beam, the projection of the reinforcement member 13 at least partially coincides with the projection of the battery cell 20 .

[0175] The projection of the reinforcement member 13 at least partially overlaps with the projection of the battery cell 20 , that is, in the thickness direction Y of the partition beam, the reinforcement member 13 at least partially overlaps with the battery cell 20 .

[0176] By setting the projection of the reinforcement 13 in the thickness direction Y of the partition beam to overlap with at least part of the projection of the battery cell 20, the reinforcement 13 is set corresponding to at least part of the battery cell 20 in the thickness direction Y of the partition beam, so that the reinforcement 13 can support and reinforce the area of ​​the partition beam 12 for the battery cell 20 to displace or expand, which is beneficial to further enhance the effect of the partition beam 12 in resisting the displacement or expansion of the battery cell 20, and facilitates the reinforcement 13 to transmit the force exerted by the battery cell 20 on the partition beam 12 to the frame 11, which is beneficial to alleviate the deformation of the partition beam 12.

[0177] According to some embodiments of the present application, see Figure 2 As shown, the battery cell 20 is a rectangular parallelepiped structure. The battery cell 20 has a first surface 21 . The first surface 21 is the surface with the largest area among the outer surfaces of the battery cell 20 . The first surface 21 is arranged facing the partition beam 12 .

[0178] The first surface 21 is the surface with the largest area among the outer surfaces of the battery cell 20 . The first surface 21 is disposed facing the partition beam 12 , that is, the thickness direction of the battery cell 20 is the same as the thickness direction Y of the partition beam.

[0179] By arranging the first surface 21 with the largest area among the outer surfaces of the battery cell 20 to face the partition beam 12, that is, the surface of the battery cell 20 that expands the largest during use is arranged to face the partition beam 12, the partition beam 12 can better restrain the expansion of the battery cell 20, thereby reducing the risk of fire and explosion caused by excessive expansion and deformation of the battery cell 20 during use.

[0180] In some embodiments, the battery cell 20 includes an electrode assembly of a wound structure, the winding axis of the electrode assembly is perpendicular to the thickness direction Y of the partition beam, and the size of the electrode assembly in the thickness direction Y of the partition beam is smaller than the size of the electrode assembly in other directions perpendicular to the winding axis of the electrode assembly.

[0181] The electrode assembly of the battery cell 20 is contained in the housing of the battery cell 20. The electrode assembly of the wound structure is a wound structure formed by winding the positive electrode sheet, the negative electrode sheet and the separator. The specific structure of the electrode assembly of the wound structure can be referred to in the related art and will not be described here.

[0182] The size of the electrode assembly in the thickness direction Y of the partition beam is smaller than the size of the electrode assembly in other directions perpendicular to the winding axis of the electrode assembly, that is, the shape of the wound structure electrode assembly is flat, and the thickness direction of the flat area of ​​the electrode assembly is consistent with the thickness direction Y of the partition beam.

[0183] By setting the winding axis of the electrode assembly inside the battery cell 20 perpendicular to the thickness direction Y of the partition beam, and the size of the electrode assembly in the thickness direction Y of the partition beam is the smallest, the battery 100 adopting this structure can have a better restraining effect on the direction in which the expansion size of the battery cell 20 is the largest through the partition beam 12, so as to reduce the expansion and deformation phenomenon of the battery cell 20 with the electrode assembly having a winding structure.

[0184] In some embodiments, the battery cell 20 includes an electrode assembly of a laminated structure, and a stacking direction of the electrode assembly is parallel to a thickness direction Y of the separation beam.

[0185] The electrode assembly of the laminated structure is an electrode assembly formed by stacking a positive electrode sheet, a negative electrode sheet and a separator. The specific structure of the electrode assembly of the laminated structure can be found in the relevant art and will not be described here.

[0186] The stacking direction of the electrode assembly is parallel to the thickness direction Y of the separation beam, that is, the positive electrode sheet, the negative electrode sheet and the separator of the electrode assembly are stacked in sequence along the thickness direction Y of the separation beam.

[0187] By setting the stacking mode of the electrode assembly inside the battery cell 20 to be consistent with the thickness direction Y of the partition beam, the battery 100 adopting this structure can have a better restraining effect on the direction of the maximum expansion size of the battery cell 20 through the partition beam 12, so as to alleviate the phenomenon of expansion and deformation of the battery cell 20 with the electrode assembly having a laminated structure.

[0188] In the embodiment in which the battery cell 20 is a rectangular parallelepiped structure, along the thickness direction Y of the partition beam, the thickness of the battery cell 20 is L 3 , meet, 5mm≤L 3 ≤40mm.

[0189] Since the first surface 21 of the battery cell 20 is disposed facing the partition beam 12, that is, the thickness direction of the battery cell 20 is consistent with the thickness direction Y of the partition beam, the thickness of the battery cell 20 is L 3 , that is, the size of the battery cell 20 in the thickness direction Y of the partition beam is between 5 mm and 40 mm.

[0190] For example, in the thickness direction Y of the separation beam, the thickness of the battery cell 20 may be 5 mm, 8 mm, 10 mm, 20 mm, 25 mm, 30 mm, or 40 mm.

[0191] In some embodiments, along the extension direction of the partition beam 12, the length of the battery cell 20 is L 4 , meet, 400mm≤L 4 ≤2500mm.

[0192] Since the partition beam 12 extends along the second direction Z, that is, the extending direction of the partition beam 12 is the second direction Z, the length of the battery cell 20 is L. 4 , that is, the maximum dimension of the battery cell 20 in the second direction Z is between 400 mm and 2500 mm.

[0193] For example, the length of the battery cell 20 in the second direction Z may be 400 mm, 500 mm, 600 mm, 700 mm, 1000 mm, 1500 mm, 2000 mm, or 2500 mm.

[0194] According to some embodiments of the present application, the battery cell 20 may also be a cylindrical structure, and the axial direction of the battery cell 20 is perpendicular to the thickness direction Y of the partition beam.

[0195] The axial direction of the battery cell 20 is perpendicular to the thickness direction Y of the partition beam, that is, the extension direction of the battery cell 20 is the first direction X perpendicular to the thickness direction Y of the partition beam.

[0196] The battery cell 20 arranged in the box body 10 of the battery 100 is a cylindrical structure. By setting the axial direction of the battery cell 20 to be consistent with the thickness direction Y of the partition beam, that is, the outer peripheral surface of the battery cell 20 is arranged to face the partition beam 12. The battery 100 adopting this structure can have a better restraining effect on the direction in which the expansion size of the battery cell 20 is the largest through the partition beam 12.

[0197] According to some embodiments of the present application, see Figure 2 As shown, there are a plurality of battery cells 20 , and the plurality of battery cells 20 are stacked along the thickness direction Y of the partition beam.

[0198] Exemplarily, the battery 100 includes two rows of battery cells 20 arranged along the second direction Z, and each row of battery cells 20 includes a plurality of battery cells 20 stacked along the thickness direction Y of the partition beam. Of course, in other embodiments, the battery 100 may include only one row of battery cells 20, or may include three rows of battery cells 20, four rows of battery cells 20, or five rows of battery cells 20 arranged along the second direction Z.

[0199] By stacking the multiple battery cells 20 arranged in the box body 10 along the thickness direction Y of the partition beam, the partition beam 12 can limit the direction of the maximum expansion size of the multiple battery cells 20, and can simultaneously limit the expansion of the multiple battery cells 20, thereby alleviating the risk of expansion and deformation of the multiple battery cells 20 of the battery 100, which is beneficial to improving the service life and safety of the battery 100.

[0200] According to some embodiments of the present application, an electrical device is further provided, comprising a battery 100 according to any of the above schemes, and the battery 100 is used to provide electrical energy to the electrical device.

[0201] The power-consuming device may be any of the aforementioned devices or systems using the battery 100 .

[0202] According to some embodiments of the present application, see Figures 2 to 5 as well as Figure 7As shown, the present application provides a box body 10, which includes a frame body 11, a partition beam 12, a reinforcement member 13 and a bottom plate 16. The frame body 11 is arranged around the bottom plate 16, and a storage space is formed inside the frame body 11. The partition beam 12 is arranged in the frame body 11, and the partition beam 12 extends along the second direction Z, and the two ends of the partition beam 12 are respectively connected to the frame body 11. The partition beam 12 is configured to divide the storage space into a first storage space 14 and a second storage space 15 arranged along the thickness direction Y of the partition beam. The first storage space 14 is used to store a battery cell 20. The frame body 11 has a first plate 111 arranged at an acute angle to the partition beam 12. The reinforcement member 13 is disposed in the second accommodation space 15. The reinforcement member 13 is a straight triangular prism structure. The reinforcement member 13 includes a first prism side surface 133, a second prism side surface 134 and a third prism side surface 135 which are connected end to end in sequence. The first prism side surface 133 is welded to the surface of the first plate 111 facing the second accommodation space 15, and the second prism side surface 134 is welded to the surface of the partition beam 12 facing the second accommodation space 15. The surface area of ​​the first prism side surface 133 and the surface area of ​​the second prism side surface 134 are both greater than the surface area of ​​the third prism side surface 135. A cavity 131 is formed inside the reinforcement member 13 and passes through both ends of the reinforcement member 13 along a first direction X. The first direction X is parallel to the side edges of the reinforcement member 13.

[0203] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0204] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A box, It is characterized in that include: A frame, forming a receiving space; a partition beam disposed in the frame, the partition beam being configured to divide the accommodation space into a first accommodation space and a second accommodation space, the first accommodation space being used to accommodate a battery cell; as well as A reinforcement member is arranged in the second accommodating space, and the reinforcement member is arranged between the partition beam and the frame body.

2. The box according to claim 1, It is characterized in that A cavity is formed inside the reinforcement.

3. The box according to claim 2, It is characterized in that A reinforcing rib is arranged in the cavity, and the reinforcing rib is connected to the cavity wall surface of the cavity.

4. The box according to claim 3, It is characterized in that There are multiple reinforcing ribs, one ends of the multiple reinforcing ribs are connected to each other, and the other ends are connected to the cavity wall surface of the cavity.

5. The box according to claim 4, It is characterized in that The reinforcement member is an extruded structure.

6. The box according to claim 1, It is characterized in that The box body also includes a bottom plate, the frame body is arranged around the bottom plate, and the reinforcement member is fixedly connected to at least one of the frame body, the partition beam and the bottom plate.

7. The box according to claim 1, It is characterized in that Two sides of the reinforcement member are respectively abutted against and fixedly connected to the frame body and the partition beam.

8. The box according to claim 7, It is characterized in that The reinforcement is made of metal material, and the frame has a connecting portion, which is used for welding with the reinforcement, and the connecting portion is made of metal material.

9. The box according to claim 7, It is characterized in that The reinforcement is made of metal material, and the partition beam has a connecting wall, which is used for welding with the reinforcement, and the connecting wall is made of metal material.

10. The housing according to claim 7, It is characterized in that Two sides of the reinforcement are respectively welded to the frame and the partition beam, and the reinforcement, the frame and the partition beam are all made of the same metal material.

11. The box according to any one of claims 1 to 10, It is characterized in that The frame includes a first plate, the first plate is used to be connected to the reinforcement, and the first plate is arranged at an acute angle with the partition beam.

12. The housing according to claim 11, It is characterized in that In the thickness direction of the partition beam, one reinforcement member is arranged between each of the first plates and the partition beam.

13. The housing according to claim 11, It is characterized in that The box body also includes a bottom plate and a box cover. In a first direction, one end of the frame body is connected to the bottom plate, and the other end is enclosed to form an opening for the box cover to cover. The frame also includes two second plates, a third plate, two fourth plates and a fifth plate, the two second plates are arranged opposite to each other along the second direction, the two fourth plates are arranged opposite to each other along the second direction, the third plate and the fifth plate are arranged opposite to each other along the thickness direction of the partition beam, and one first plate, one second plate, the third plate, another second plate, another first plate, one fourth plate, the fifth plate and another fourth plate are sequentially connected end to end to enclose the frame; The first direction, the thickness direction of the partition beam and the second direction are perpendicular to each other.

14. The housing according to claim 11, It is characterized in that The box body also includes a bottom plate and a box cover. In a first direction, one end of the frame body is connected to the bottom plate, and the other end is enclosed to form an opening for the box cover to cover. The frame body further includes a fifth plate, and two of the first plates are respectively connected to two ends of the fifth plate in the second direction, so that the partition beam, the fifth plate and the two first plates enclose the second accommodation space of a trapezoidal structure; The first direction, the thickness direction of the partition beam and the second direction are perpendicular to each other.

15. The housing according to claim 14, It is characterized in that The frame also includes two second plates and a third plate, the two second plates are arranged opposite to each other along the second direction, the third plate and the fifth plate are arranged opposite to each other along the thickness direction of the partition beam, and one first plate, one second plate, the third plate, another second plate, another first plate and the fifth plate are connected end to end in sequence to enclose the frame.

16. The housing according to claim 11, It is characterized in that The frame also includes two second plates, one ends of the two first plates are connected to each other, and the other ends are respectively connected to the two second plates, so that the partition beam and the two first plates enclose the second accommodating space with a triangular structure.

17. The housing according to claim 11, It is characterized in that The reinforcement is a prism structure, and the first plate and the partition beam are respectively connected to different prism sides of the reinforcement.

18. The housing according to claim 17, It is characterized in that The reinforcing member is a straight triangular prism structure, and the reinforcing member comprises a first prism side surface, a second prism side surface and a third prism side surface connected end to end in sequence, the first prism side surface is used to connect to the first plate, and the second prism side surface is used to connect to the partition beam; The surface area of ​​the first prism side surface and the surface area of ​​the second prism side surface are both greater than the surface area of ​​the third prism side surface.

19. The housing according to claim 18, It is characterized in that The side surface of the first prism is in contact with the surface of the first plate facing the second accommodation space, and the side surface of the second prism is in contact with the surface of the partition beam facing the second accommodation space.

20. The housing according to claim 18, It is characterized in that The reinforcement is configured to be welded to the first plate and the partition beam respectively to form a first weld and a second weld, wherein the first weld extends along at least a portion of an outer edge of the first prism side surface, and the second weld extends along at least a portion of an outer edge of the second prism side surface.

21. The housing according to claim 17, It is characterized in that The box body also includes a bottom plate and a box cover. In a first direction, one end of the frame body is connected to the bottom plate, and the other end is enclosed to form an opening for the box cover to cover. Wherein, a cavity is formed inside the reinforcement member and passes through two ends of the reinforcement member along the first direction.

22. The housing according to claim 21, It is characterized in that The first direction is parallel to a side edge of the reinforcement member.

23. The housing according to claim 21, It is characterized in that The surface of the reinforcement member penetrated by the cavity is different from the surface of the reinforcement member used for connecting with the first plate and the separation beam, respectively.

24. The housing according to claim 11, It is characterized in that The extending direction of the reinforcement is parallel to the thickness direction of the partition beam, and two ends of the reinforcement are respectively connected to the first plate and the partition beam.

25. The housing according to claim 24, It is characterized in that A cavity is formed inside the reinforcement member and penetrates through both ends of the reinforcement member along the thickness direction of the partition beam.

26. The housing according to claim 1, It is characterized in that Along the thickness direction of the partition beam, the length of the frame is L 1 , meet, 900mm≤L 1 ≤2800mm.

27. The housing according to claim 1, It is characterized in that The length of the partition beam is L 2 , meet, 500mm≤L 2 ≤1700mm.

28. A battery, It is characterized in that include: The box as described in any one of claims 1 to 27; as well as The battery cell is accommodated in the first accommodation space.

29. The battery according to claim 28, It is characterized in that Along the thickness direction of the separation beam, a projection of the reinforcement member at least partially overlaps with a projection of the battery cell.

30. The battery according to claim 28, It is characterized in that The battery cell has a first surface, which is a surface with the largest area among the outer surfaces of the battery cell, and the first surface is arranged to face the partition beam.

31. The battery according to claim 28, It is characterized in that The battery cell includes an electrode assembly of a wound structure, the winding axis of the electrode assembly is perpendicular to the thickness direction of the partition beam, and the size of the electrode assembly in the thickness direction of the partition beam is smaller than the size of the electrode assembly in other directions perpendicular to the winding axis of the electrode assembly.

32. The battery according to claim 28, It is characterized in that The battery cell includes an electrode assembly, the electrode assembly is flat, and the thickness direction of the flat region of the electrode assembly is consistent with the thickness direction of the partition beam.

33. The battery according to claim 28, It is characterized in that The battery cell includes an electrode assembly of a laminated structure, and a stacking direction of the electrode assembly is parallel to a thickness direction of the separation beam.

34. A battery according to any one of claims 28 to 33, It is characterized in that Along the thickness direction of the partition beam, the thickness of the battery cell is L 3 , meet, 5mm≤L 3 ≤40mm.

35. The battery according to any one of claims 28 to 33, It is characterized in that Along the extension direction of the partition beam, the length of the battery cell is L 4 , meet, 400mm≤L 4 ≤2500mm.

36. The battery according to claim 28, It is characterized in that The battery cell is a cylindrical structure, and the axis direction of the battery cell is perpendicular to the thickness direction of the partition beam.

37. The battery according to claim 28, It is characterized in that There are a plurality of battery cells, and the plurality of battery cells are stacked along a thickness direction of the partition beam.

38. The battery according to claim 37, It is characterized in that The battery includes two rows of battery cells arranged along a second direction, each row of battery cells includes a plurality of battery cells stacked along a thickness direction of the partition beam, and the second direction is perpendicular to the thickness direction of the partition beam.

39. An electrical device, It is characterized in that The invention comprises a battery as claimed in any one of claims 28 to 38, wherein the battery is used to provide electrical energy.

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