Battery and electric device

Abstract

The utility model is applicable to the technical field of power batteries, and provides a battery and a power utilization device, the battery comprises a box body, the box body is used for accommodating a battery monomer, at least two fixed beams are arranged in the box body at intervals, and a space for accommodating the battery monomer is formed between every two adjacent fixed beams; the fixed seat is arranged on the fixed beam; the limiting pieces are connected to the fixing seats on the different fixing beams; the limiting pieces are connected to different fixing beams, so that the deformation of the fixing beams is inhibited through the limiting pieces, the strength of the fixing beams is enhanced, and the deformation quantity of the fixing beams along with the expansion of the battery monomers is reduced; by arranging the fixing seats, the strength of the joints of the limiting pieces and the fixing beams is enhanced, the failure conditions such as breakage of the joints of the limiting pieces and the fixing beams are reduced, the strength of the fixing beams is further enhanced, and therefore expansion of the single batteries is better restrained, the battery performance is improved, and potential safety hazards are reduced.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] During the charging and discharging process, the battery is prone to generate a large expansion force, which will act on the beam structure of the battery box and cause the box to deform. If the box deformation cannot be properly suppressed, it will easily cause the beam structure to break, and on the other hand, it will easily cause problems such as cracking of the battery cell shell and breaking of the connecting aluminum bar, which will lead to battery failure and even safety problems. Summary of the invention

[0004] In view of the above problems, the present application provides a battery and an electrical device that can alleviate the problem of box deformation.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0006] A box body, the box body is used to accommodate the battery monomer;

[0007] At least two fixed beams, at least two fixed beams are arranged on the box body at intervals, and a space for accommodating a battery cell can be formed between two adjacent fixed beams;

[0008] A fixed seat, arranged on the fixed beam;

[0009] The limiting member is connected to the fixing seats on different fixing beams.

[0010] In the technical solution of this embodiment, a fixed beam is arranged in the box body, so that the battery cell can be placed between two adjacent fixed beams, and the expansion of the battery cell is suppressed by the fixed beam, thereby reducing the safety hazard caused by the expansion of the battery cell; the limiter is connected to different fixed beams to suppress the deformation of the fixed beam through the limiter, enhance the strength of the fixed beam, and reduce the deformation of the fixed beam with the expansion of the battery cell; the strength of the connection between the limiter and the fixed beam is enhanced by arranging a fixing seat, and the occurrence of failures such as breakage at the connection between the limiter and the fixed beam is reduced, thereby further enhancing the strength of the fixed beam, thereby better suppressing the expansion of the battery cell, improving battery performance, and reducing safety hazards.

[0011] In some embodiments, a receiving groove can be formed between any two fixed beams, the battery cell is located in the receiving groove, and the fixing seat is arranged on a side of the fixed beam away from the receiving groove.

[0012] Since the force exerted on the fixing seat mainly comes from the expansion of the battery cell, and the force generated by the expansion of the battery cell points from the accommodating slot to the outside of the accommodating slot, the technical solution of this embodiment arranges the fixing seat on the side of the fixed beam away from the accommodating slot, so that the force generated by the expansion of the battery cell can be partially applied to the fixing seat and transmitted to the limiting member through the fixing seat, so as to reduce the situation where the force is concentrated at the connection between the fixing seat and the fixed beam, thereby reducing the situation where the connection between the fixing seat and the fixed beam fails, so that the force exerted on the fixed beam can be more easily transmitted to the fixing seat and the limiting member, thereby further enhancing the strength of the fixed beam.

[0013] In some embodiments, a fixing groove is formed on the fixing beam, the fixing seat is received in the fixing groove, and an outer wall of the fixing seat abuts against an inner wall of the fixing groove.

[0014] The technical solution of this embodiment further provides some ways of connecting the fixing seat and the fixing beam. A fixing groove is provided on the fixing beam, and the fixing seat is accommodated in the fixing groove, so that the interior of the fixing groove can be connected to the fixing seat from multiple directions, thereby increasing the contact area between the fixing seat and the fixed beam, so that the force can be transmitted to the fixing seat more evenly, reducing the situation where the force at the connection between the fixing seat and the fixed beam is concentrated on a certain point, thereby increasing the connection strength between the fixing seat and the fixed beam.

[0015] In some embodiments, along the height direction of the fixing beam, the size of the fixing groove is smaller than the size of the fixing beam.

[0016] In the technical solution of the present embodiment, the dimension of the fixing groove in the direction of the height of the fixing beam is made smaller than the dimension of the fixing beam, so that the dimension of the fixing seat in the direction of the height of the fixing beam can also be smaller than the dimension of the fixing beam; when the fixing beam is subjected to the expansion force of the battery, the force applied to the fixing seat by the limiting member is directed from the outside to the direction of the accommodating groove, and the limiting member is connected to one end of the fixing seat, and the end of the fixing seat away from the limiting member is prone to form a lever force directed from the inside of the accommodating groove to the outside, and has a negative impact on the connection stability between the fixing seat and the fixed beam; making the dimension of the fixing seat in the direction of the height of the fixing beam smaller than the dimension of the fixing beam can reduce the negative impact of the lever force on the connection stability between the fixing seat and the fixed beam, thereby enhancing the connection strength between the fixing seat and the fixed beam.

[0017] In some embodiments, along the thickness direction of the fixing beam, the width of the fixing groove gradually increases, and the width of the fixing seat also gradually increases.

[0018] In the technical solution of this embodiment, the fixing groove is set to a shape that gradually expands in a direction away from the accommodating groove, and the width of the fixing seat is gradually increased so that the shape of the fixing seat can adapt to the shape of the fixing groove. This setting can further increase the contact area between the fixing seat and the fixing beam, thereby further increasing the strength of the connection between the fixing seat and the fixing beam; at the same time, this setting can also make the inner wall of the fixing groove and the outer wall of the fixing seat inclined relative to the direction of the expansion force. Because the fixed beam has a tendency to deform in a direction away from the accommodating groove when subjected to the expansion force of the battery cell, this setting can make the expansion force received at the connection between the fixing seat and the fixed beam form a component force perpendicular to the inner wall of the fixing groove as a tensile force, and also form a component force along the inner wall of the fixing groove as a shear force, so as to reduce the situation where the connection between the fixing seat and the fixing groove is only subjected to a single force and is easy to break, and at the same time, the force received at the connection between the fixing seat and the fixing groove can be dispersed and transmitted to the fixed beam, thereby further increasing the strength of the connection between the fixing seat and the fixed beam.

[0019] In some embodiments, the shape of the fixing seat is a triangular prism, a trapezoidal quadrangular prism or a semi-cylinder.

[0020] The technical solution of this embodiment further provides some specific structures of the fixing seat to increase the contact area between the fixing seat and the fixed beam, thereby further increasing the strength of the connection between the fixing seat and the fixed beam; at the same time, it can also better disperse and transmit the force exerted on the connection between the fixing seat and the fixed beam to the inside of the fixed beam, thereby further increasing the strength of the connection between the fixing seat and the fixed beam.

[0021] In some embodiments, a weight-reducing groove is provided on the fixing seat.

[0022] In the technical solution of this embodiment, the weight-reducing groove is provided on the fixing seat so as to reduce the weight of the fixing seat, thereby reducing the negative impact of the setting of the fixing seat on the overall weight of the box body.

[0023] In some embodiments, at least two fixing seats are spaced apart on the fixing beam along the length direction of the fixing beam.

[0024] In the technical solution of this embodiment, a plurality of fixing seats are arranged on the fixing beam, so that the fixing seats and the limiting members can better transmit the expansion force of the battery cells exerted on the fixing beam, thereby better achieving the effect of suppressing the deformation of the fixing beam.

[0025] In some embodiments, the material of the fixing seat is the same as the material of the fixing beam.

[0026] In the technical solution of this embodiment, the material of the fixing seat is the same as that of the fixing beam, so that the expansion force of the battery cell can be more evenly distributed between the fixing seat and the fixing beam, thereby reducing the occurrence of the fixing seat or the fixing beam breaking and failing first.

[0027] In some embodiments, the limiting member is detachably connected to the corresponding fixing seat.

[0028] In the technical solution of this embodiment, the limit member is detachably connected to the fixing seat to facilitate the installation, removal and replacement of the limit member; at the same time, it is also convenient to apply a pre-tightening force to the limit member in advance, so that the limit member can better suppress the deformation of the fixed beam through the pre-tightening force.

[0029] In some embodiments, the box body further includes a first box body; at least one fixed beam constitutes a frame of the first box body, or each fixed beam is located inside the first box body.

[0030] The technical solution of this embodiment provides some ways of setting the fixed beams, so that the fixed beams can be structural members inside the box, so that the fixed beams can also play a role in increasing the strength of the box; at the same time, the fixed beams can also serve as the frame of the box to reduce the space occupied by the fixed beams inside the box.

[0031] In some embodiments, the battery further comprises a battery cell, and the battery cell is disposed between two adjacent fixing beams;

[0032] The side surface of the battery cell includes two oppositely disposed first surfaces and two oppositely disposed second surfaces, the first surface is adjacent to the second surface, and the area of ​​the first surface is larger than the area of ​​the second surface; the first surface faces the fixed beam.

[0033] In the technical solution of this embodiment, the first surface with a larger area in the battery cell is opposite to the fixed beam. Since the deformation of the first surface with a larger area is usually larger, the expansion of the battery cell can be better suppressed by the fixed beam by making the first surface opposite to the fixed beam.

[0034] In some embodiments, the battery cell further includes a pressure relief mechanism, and the limiting member and the pressure relief mechanism are arranged alternately.

[0035] In the technical solution of this embodiment, the limiting members and the pressure relief mechanisms of the battery cells are arranged alternately to reduce the situation where the limiting members cover the pressure relief mechanisms and hinder the exhaust of the pressure relief mechanisms, thereby reducing the negative impact of the limiting members on the exhaust of the battery cells.

[0036] In a second aspect, some embodiments of the present application further provide an electrical device, comprising the battery provided by some embodiments of the first aspect.

[0037] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0039] Figure 1 A schematic diagram of the structure of an electric device provided in some embodiments of the present application;

[0040] Figure 2 A schematic diagram of an exploded structure of a battery provided in some embodiments of the present application;

[0041] Figure 3 A schematic diagram of an exploded structure of a battery cell provided in some embodiments of the present application;

[0042] Figure 4 A three-dimensional schematic diagram of a first box in the boxes provided in some embodiments of the present application;

[0043] Figure 5 for Figure 4 A local enlarged schematic diagram of the middle A;

[0044] Figure 6 for Figure 5 Schematic diagram of the explosion structure of the middle fixed beam and the fixed seat;

[0045] Figure 7 A schematic top view of a battery provided in some embodiments of the present application with the second housing removed;

[0046] Figure 8 for Figure 7 A local enlarged schematic diagram of point B in the middle.

[0047] The meanings of the marks in the figure are:

[0048] 100. Electrical devices;

[0049] 10. Motor;

[0050] 20. Controller;

[0051] 200. Battery;

[0052] 30. Battery cell; 301. First surface; 302. Second surface; 31. End cover; 32. Electrode assembly; 33. Shell; 34. Pressure relief mechanism;

[0053] 300, box body;

[0054] 70, first box body; 71, fixed beam; 711, fixed groove; 72, fixed seat; 721, threaded hole; 722, weight-reducing groove; 73, limiter; 74, receiving groove;

[0055] 80. The second box. DETAILED DESCRIPTION

[0056] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0058] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0059] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0060] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0061] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0062] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0063] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0064] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0065] Battery cells tend to generate large expansion forces during the charging and discharging process, which will act on the beam structure of the battery box and cause the box to deform. If the box deformation cannot be properly suppressed, it will easily lead to the fracture of the beam structure, and on the other hand, it will easily lead to the cracking of the battery cell shell and the breakage of the current collecting components, which will lead to battery failure and even safety problems.

[0066] In order to alleviate the problem of deformation of the box caused by the expansion of battery cells, an annular steel belt surrounding the battery cells is usually set in the box. Specifically, the steel belt is made to surround multiple battery cells in the box, and the expansion of the battery cells is suppressed by the steel belt. Although such a setting can suppress the expansion of the battery cells, it is necessary to surround the steel belt and form a battery module before the battery cells are installed in the box, which makes the process of installing the battery cells into the box more complicated and will have a negative impact on production efficiency; and if the annular steel belt is assembled after the battery cells are installed in the box, the difficulty of assembly will increase, and there is no relevant space in some types of battery boxes for the annular steel belt to be assembled.

[0067] At present, some batteries directly fix the steel belt on the beam structure of the box through rivets, bolts and other structures, and limit the deformation of the beam structure through the steel belt. However, because the beam structure is mostly hollow, the strength of the connection between the steel belt and the beam structure is usually low, that is, rivets, bolts and other structures are easy to fall out. If the thickness of the beam structure is increased or the beam structure is set as a solid structure, it will lead to a significant increase in the weight of the box and an increase in cost.

[0068] Based on the above considerations, in order to increase the strength of the box body and reduce the negative impact of the expansion of the battery cells on the box body, an embodiment of the present application provides a battery box body, in which a limiter is connected to different fixed beams, and a fixed seat is provided at the connection between the limiter and the fixed beam, that is, the fixed seat is provided on the fixed beam, and one end of the limiter is provided on the fixed seat.

[0069] In such a box, since the battery cell is located between two adjacent fixed beams, the expansion of the battery cell will cause the fixed beam to deform away from the battery cell, that is, the fixed beams on both sides of the battery cell deform in opposite directions, so that the limiter is connected to different fixed beams, so that the expansion forces on both ends of the limiter are in opposite directions, so as to utilize the expansion force of the battery cell itself and the structural strength of the limiter to limit the deformation of the fixed beam; at the same time, the limiter can connect each fixed beam into an integral system, and the force received by the fixed beam can be transmitted to the entire system, thereby reducing the occurrence of local deformation of the fixed beam, thereby achieving the effect of suppressing the deformation of the fixed beam and enhancing the strength of the fixed beam, thereby reducing the deformation of the box.

[0070] The limiter is connected to the fixed beam through a fixing seat, thereby reducing failures such as breakage at the connection between the limiter and the fixed beam, further enhancing the strength of the fixed beam, thereby better suppressing the expansion of the battery cell, improving battery performance, and reducing safety hazards.

[0071] The box disclosed in the embodiment of the present application can be used to accommodate battery cells, and the battery cells can be applied to electrical devices using power sources or various energy storage systems using batteries as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0072] For the convenience of description, the following embodiments are described by taking an electric device 100 of an embodiment of the present application as a vehicle as an example.

[0073] refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle 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 200 is provided inside the vehicle, and the battery 200 may be provided at the bottom, head or tail of the vehicle. The battery 200 may be used to power the vehicle, for example, the battery 200 may be used as an operating power source for the vehicle. The vehicle may also include a controller 20 and a motor 10, and the controller 20 is used to control the battery 200 to power the motor 10, for example, for starting, navigating and driving the vehicle.

[0074] In some embodiments of the present application, the battery 200 can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0075] refer to Figure 2 , Figure 2 An exploded view of a battery 200 provided in some embodiments of the present application. The battery 200 includes a box 300 and a battery cell 30, and the battery cell 30 is contained in the box 300. Among them, the box 300 is used to provide a storage space for the battery cell 30, and the box 300 can adopt a variety of structures. In some embodiments, the box 300 may include a first box 70 and a second box 80, and the first box 70 and the second box 80 cover each other, and the first box 70 and the second box 80 jointly define a storage space for accommodating the battery cell 30. The second box 80 can be a hollow structure with one end open, and the first box 70 can be a plate-like structure. The first box 70 covers the open side of the second box 80, so that the first box 70 and the second box 80 jointly define a storage space; the first box 70 and the second box 80 can also be hollow structures with one side open, and the open side of the first box 70 covers the open side of the second box 80. Of course, the box body 300 formed by the first box body 70 and the second box body 80 can be in various shapes, such as a cylinder, a cuboid, etc.

[0076] In the battery 200, there may be multiple battery cells 30, and the multiple battery cells 30 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 30 are both connected in series and in parallel. The multiple battery cells 30 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 30 is accommodated in the box 300; of course, the battery 200 may also be a battery 200 module formed by connecting multiple battery cells 30 in series, in parallel, or in a mixed connection, and then the multiple battery 200 modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 300. The battery 200 may also include other structures, for example, the battery 200 may also include a converging component for realizing electrical connection between the multiple battery cells 30.

[0077] Each battery cell 30 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 30 may be cylindrical, flat, rectangular, or in other shapes.

[0078] refer to Figure 3 , Figure 3 The schematic diagram of the exploded structure of the battery cell 30 provided in some embodiments of the present application. The battery cell 30 refers to the smallest unit constituting the battery 200. As shown in the figure, the battery cell 30 includes an end cap 31, a housing 33, an electrode assembly 32 and other functional components.

[0079] The end cap 31 refers to a component that covers the opening of the shell 33 to isolate the internal environment of the battery cell 30 from the external environment. Without limitation, the shape of the end cap 31 can be adapted to the shape of the shell 33 to match the shell 33. Optionally, the end cap 31 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 31 is not easily deformed when squeezed and collided, so that the battery cell 30 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals can be provided on the end cap 31. The electrode terminal can be used to electrically connect to the electrode assembly 32 for outputting or inputting electrical energy of the battery cell 30. In some embodiments, the end cap 31 can also be provided with a pressure relief mechanism 34 for releasing the internal pressure when the internal pressure or temperature of the battery cell 30 reaches a threshold. The material of the end cap 31 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 31, and the insulating member may be used to isolate the electrical connection components in the housing 33 from the end cap 31 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0080] The shell 33 is a component used to cooperate with the end cap 31 to form the internal environment of the battery cell 30, wherein the formed internal environment can be used to accommodate the electrode assembly 32, the electrolyte and other components. The shell 33 and the end cap 31 can be independent components, and an opening can be set on the shell 33, and the internal environment of the battery cell 30 is formed by covering the opening with the end cap 31 at the opening. Without limitation, the end cap 31 and the shell 33 can also be integrated. Specifically, the end cap 31 and the shell 33 can form a common connection surface before other components are put into the shell, and when the interior of the shell 33 needs to be encapsulated, the end cap 31 covers the shell 33. The shell 33 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 33 can be determined according to the specific shape and size of the electrode assembly 32. The material of the shell 33 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0081] The electrode assembly 32 is a component in the battery cell 30 where electrochemical reactions occur. One or more electrode assemblies 32 may be included in the housing 33. The electrode assembly 32 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 32, and the parts of the positive and negative electrode sheets without active materials each constitute a tab. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery 200, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0082] In a first aspect, some embodiments of the present application provide a battery 200, referring to Figure 2 , Figure 4 ,in, Figure 2 Schematic diagram of the exploded structure of the battery 200 provided in some embodiments of the present application, Figure 4 This is a three-dimensional schematic diagram of the first box body 70 in the box body 300 provided in some embodiments of the present application.

[0083] Figure 4 The direction of the X-axis is the length direction of the box body 300 , the direction of the Y-axis is the width direction of the box body 300 , and the direction of the Z-axis is the height direction of the box body 300 .

[0084] In some embodiments of the present application, the battery 200 includes a box body 300, which is used to accommodate a battery cell 30. The box body 300 includes a fixed beam 71, a fixed seat 72 and a limit member 73. Specifically, the box body 300 includes at least two fixed beams 71 spaced apart on the box body 300, and a space for accommodating the battery cell 30 is formed between two adjacent fixed beams 71; the fixed seat 72 is arranged on the fixed beam 71; and the limit member 73 is connected to the fixed seat 72 on different fixed beams 71.

[0085] The fixed beam 71 refers to a structure formed inside the box body 300. The fixed beam 71 can be arranged on the first box body 70 or on the second box body 80. The main function of the fixed beam 71 is to provide strength for the box body 300. At the same time, the fixed beam 71 can also limit the position of the battery cell 30 to assist in fixing the battery cell 30. The shape of the fixed beam 71 can be a rectangular parallelepiped, a cylindrical shape or other shapes. The material of the fixed beam 71 can be metal, plastic or other materials. The fixed beam 71 can be welded to the box body 300, or it can be arranged on the box body 300 by other means such as snap connection, bolt connection, adhesive connection, etc.

[0086] Since the main function of the fixed beam 71 is to increase the strength of the box body 300, and the setting of the fixed beam 71 should not affect the arrangement of the battery cell 30 in the box body 300, there should be at least two fixed beams 71. At this time, the two fixed beams 71 can be arranged on opposite sides of the battery cell 30 to reduce the negative impact of the fixed beam 71 on the installation and arrangement of the battery cell 30, and at the same time, the fixed beam 71 can also be abutted against the battery cell 30 to assist in fixing the battery cell 30; at least two fixed beams 71 can also better enhance the strength of the box body 30.

[0087] The fixing seat 72 refers to a structure in the box body 300 that provides a fixing foundation for the limiting member 73, and the fixing seat 72 is also used as a transition structure between the limiting member 73 and the fixed beam 71; the shape of the fixing seat 72 can be a block, a sheet or other shapes, and the fixing seat 72 can be a rectangular parallelepiped, a prism or other shapes; the material of the fixing seat 72 can be the same as the material of the fixed beam 71, and the material of the fixing seat 72 can also be different from the material of the fixed beam 71, for example, the material of the fixing seat 72 can be metal, plastic or other materials; the fixing seat 72 can be welded to the fixed beam 71, and can also be arranged on the fixed beam 71 by means of snap connection, adhesive connection, bolt connection, etc.

[0088] The limit member 73 refers to a structure connecting different fixed beams 71 in the box body 300, and the two ends of the limit member 73 are respectively connected to different fixed beams 71 to limit the deformation of the fixed beams 71 and enhance the strength of the fixed beams 71; the shape of the limit member 73 can be strip-shaped, sheet-shaped (such as a metal sheet structure), block-shaped (such as a flat beam structure) or other shapes; the material of the limit member 73 can be metal, plastic or other materials; the limit member 73 can be connected to the fixed seat 72 by bolt connection, and can also be connected to the fixed seat 72 by welding, snap connection or other methods.

[0089] Because the fixing seat 72 is connected to the fixing beam 71, the expansion force of the battery cell 30 on the fixing beam 71 can be transmitted to the limiter 73 through the fixing seat 72, and then transmitted to another fixing beam 71 through the limiter 73, so as to suppress the force deformation or deformation tendency of the fixing beam 71, thereby improving the strength of the fixing beam 71.

[0090] Because the battery cell 30 is located between two adjacent fixed beams 71, the expansion of the battery cell 30 will cause the fixed beam 71 to deform in a direction away from the battery cell 30, that is, the deformation directions of the fixed beams 71 on both sides of the battery cell 30 are opposite, so that the limiter 73 is connected to different fixed beams 71, so that the expansion forces at both ends of the limiter 73 are in opposite directions, so as to utilize the expansion force of the battery cell 30 itself to limit the deformation of the fixed beam 71; at the same time, the limiter 73 can connect each fixed beam 71 into an integral system. At this time, the force exerted on the fixed beam 71 can be transmitted to the entire system, thereby reducing the occurrence of local deformation of the fixed beam 71, thereby achieving the effect of suppressing the deformation of the fixed beam 71 and enhancing the strength of the fixed beam 71, thereby reducing the deformation of the box body 300.

[0091] The limit member 73 is connected to the fixed beam 71 via the fixing seat 72, thereby reducing the possibility of failure such as breakage at the connection between the limit member 73 and the fixed beam 71, and further enhancing the strength of the fixed beam 71, thereby better suppressing the expansion of the battery cell 30, improving the performance of the battery 200, and reducing safety hazards.

[0092] In this embodiment, a fixed beam 71 is provided in the box body 300, so that the battery cell 30 can be placed between two adjacent fixed beams 71, and the expansion of the battery cell 30 is suppressed by the fixed beam 71, thereby reducing the safety hazard that may be caused by the expansion of the battery cell 30; the limiter 73 is connected to different fixed beams 71, so that the deformation of the fixed beam 71 can be suppressed by the limiter 73, the strength of the fixed beam 71 is enhanced, and the deformation of the fixed beam 71 with the expansion of the battery cell 30 is reduced; the strength of the connection between the limiter 73 and the fixed beam 71 is enhanced by providing a fixing seat 72, and the occurrence of failures such as breakage at the connection between the limiter 73 and the fixed beam 71 is reduced, and the strength of the fixed beam 71 is further enhanced, thereby better suppressing the expansion of the battery cell 30, improving the performance of the battery 200, and reducing safety hazards.

[0093] According to some embodiments of the present application, reference Figure 4 , Figure 5 , Figure 6 ,in, Figure 4 This is a three-dimensional schematic diagram of the first box body 70 in the box body 300 provided in some embodiments of the present application. Figure 5 for Figure 4 A partial enlarged schematic diagram of point A in the middle. Figure 6 for Figure 5 Schematic diagram of the exploded structure of the middle fixed beam 71 and the fixed seat 72.

[0094] Figure 4 The direction of the X-axis is the length direction of the box body 300 , the direction of the Y-axis is the width direction of the box body 300 , and the direction of the Z-axis is the height direction of the box body 300 .

[0095] In some embodiments of the present application, a receiving groove 74 can be formed between any two fixing beams 71 , the battery cell 30 is located in the receiving groove 74 , and the fixing seat 72 is disposed on a side of the fixing beam 71 away from the receiving groove 74 .

[0096] The accommodating groove 74 refers to a structure formed between two adjacent fixed beams 71. The accommodating groove 74 is used to provide space for the placement and arrangement of the battery cells 30. The accommodating groove 74 can be formed by two fixed beams 71 in conjunction with the side walls and bottom walls of the box body 300. The accommodating groove 74 can also be formed by two fixed beams 71 in conjunction with the bottom wall of the box body 300. The accommodating groove 74 can also be formed by only two fixed beams 71. The shape of the accommodating groove 74 can be rectangular, cylindrical or other shapes.

[0097] Since the number of the fixed beams 71 can be two, three or more, the receiving slot 74 can be formed between any two fixed beams 71. In some embodiments, there are two fixed beams 71, in which case the receiving slot 74 is formed between the two fixed beams 71, and the fixing seat 72 is disposed on the side of the fixed beam 71 away from the receiving slot 74; in other embodiments, there are three fixed beams 71, and the receiving slot 74 is only formed between the two fixed beams 71 at both ends, that is, the fixed beam 71 in the middle of the three fixed beams 71 is only used to enhance the structural strength of the box body 300, and is not used to fix the fixing seat 72 and the stopper 73. In this case, the fixing seat 72 is disposed on the side of the fixed beam 71 away from the receiving slot 74; in still other embodiments, the fixing seat 72 is disposed on the side of the fixed beam 71 away from the receiving slot 74. There are three fixed beams 71, and a receiving groove 74 is formed between two adjacent fixed beams 71. At this time, fixed seats 72 are provided on both sides of the middle fixed beam 71 among the three fixed beams 71, and the middle fixed beam 71 is mainly used to provide a fixed foundation for the fixed seat 72 and is not easily deformed with the expansion force. The limit member 73 spans an receiving groove 74 and is connected to two fixed seats 72 on the side of the fixed beam 71 away from the corresponding receiving groove 74; it can be understood that the number and arrangement of the fixed beams 71 and the setting method of the fixed seat 72 can also be other methods, and are not limited to the above-mentioned methods.

[0098] Since the stopper 73 is used to suppress the deformation of the fixed beam 71, and the fixing seat 72 is used to provide a fixing base for the stopper 73, when the fixed beam 71 is subjected to the expansion force of the battery cell 30, the force direction thereof is from the receiving groove 74 to the direction away from the receiving groove 74, that is, from the receiving groove 74 to the outside of the receiving groove 74 in the X-axis direction in the figure, and the force direction of the fixing seat 72 and the stopper 73 is the same as the force direction of the fixed beam 71. Accordingly, in this embodiment, the fixing seat 72 is arranged on the side of the battery cell 30 away from the receiving groove 74, so that the force generated by the expansion of the battery cell 30 can be partially applied to the fixing seat 72 and transmitted to the stopper 73 through the fixing seat 72, so as to reduce the situation where the force is concentrated at the connection between the fixing seat 72 and the fixed beam 71, thereby reducing the situation where the connection between the fixing seat 72 and the fixed beam 71 fails, so that the force on the fixed beam 71 can be more easily transmitted to the fixing seat 72 and the stopper 73, and the strength of the fixed beam 71 is further enhanced.

[0099] According to some embodiments of the present application, reference Figure 4 , Figure 5 , Figure 6 ,in, Figure 4 This is a three-dimensional schematic diagram of the first box body 70 in the box body 300 provided in some embodiments of the present application. Figure 5 for Figure 4 A partial enlarged schematic diagram of point A in the middle. Figure 6 for Figure 5 Schematic diagram of the exploded structure of the middle fixed beam 71 and the fixed seat 72.

[0100] Figure 4 The direction of the X-axis is the length direction of the box body 300 , the direction of the Y-axis is the width direction of the box body 300 , and the direction of the Z-axis is the height direction of the box body 300 .

[0101] In some embodiments of the present application, a fixing groove 711 is formed on the fixing beam 71 , the fixing seat 72 is accommodated in the fixing groove 711 , and an outer wall of the fixing seat 72 abuts against an inner wall of the fixing groove 711 .

[0102] The fixing groove 711 refers to a groove structure opened on the fixing beam 71, and the fixing groove 711 is used to accommodate the fixing seat 72; the fixing groove 711 can be a rectangular groove, a trapezoidal groove or a groove of other shapes; the fixing groove 711 can be opened on any side of the fixing beam 71, for example, the fixing groove 711 is opened on the side of the fixing beam 71 away from the bottom surface of the box body 300, and for another example, the fixing groove 711 is opened on the side of the fixing beam 71 away from the accommodating groove 74.

[0103] The fixing seat 72 is accommodated in the fixing groove 711, and the outer wall of the fixing seat 72 abuts against the inner wall of the fixing groove 711, that is, the side wall of the fixing groove 711 can be connected to the fixing seat 72 from multiple different directions. When the fixing beam 71 is subjected to the expansion force of the battery cell 30, the fixing beam 71 has a tendency to deform in a direction away from the accommodating groove 74. At this time, the force applied to the fixing seat 72 can be dispersed to different directions of the fixing beam 71 through the fixing seat 72 and the inner wall of the fixing groove 711 to reduce the concentration of force, thereby reducing the force applied to the connection between the fixing seat 72 and the fixing beam 71 and increasing the stability of the connection between the fixing seat 72 and the fixing beam 71.

[0104] The outer wall of the fixing seat 72 abutting against the inner wall of the fixing groove 711 can also increase the contact area between the fixing seat 72 and the fixing beam 71, thereby increasing the connection strength between the fixing seat 72 and the side wall of the fixing groove 711, and can also make the force at the connection point between the fixing seat 72 and the fixing beam 71 more dispersed, reducing the situation where the force is concentrated at a certain point where the fixing seat 72 and the fixed beam 71 are connected.

[0105] The present embodiment further provides some ways of connecting the fixing seat 72 with the fixing beam 71. A fixing groove 711 is provided on the fixing beam 71, and the fixing seat 72 is accommodated in the fixing groove 711, so that the interior of the fixing groove 711 can be connected to the fixing seat 72 from multiple directions, thereby increasing the contact area between the fixing seat 72 and the fixing beam 71, so that the force can be transmitted to the fixing seat 72 more evenly, reducing the situation where the force at the connection between the fixing seat 72 and the fixed beam 71 is concentrated on a certain point, thereby increasing the connection strength between the fixing seat 72 and the fixed beam 71.

[0106] refer to Figure 4In some embodiments, along the height direction of the fixing beam 71 , the size of the fixing groove 711 is smaller than the size of the fixing beam 71 .

[0107] The height direction of the fixed beam 71 is the direction of the Z axis in the figure, and the dimension of the fixed beam 71 in its height direction refers to the dimension of the fixed beam 71 in the Z axis direction; the dimension of the fixed groove 711 in the height direction of the fixed beam 71 refers to the dimension of the fixed groove 711 in the Z axis direction; the dimension of the fixed seat 72 in the height direction of the fixed beam 71 refers to the dimension of the fixed seat 72 in the Z axis direction.

[0108] The dimension of the fixing groove 711 in the height direction of the fixing beam 71 is smaller than that of the fixing beam 71 , so that the dimension of the fixing seat 72 in the height direction of the fixing beam 71 is also smaller than that of the fixing beam 71 , that is, the length of the fixing seat 72 should not be too long.

[0109] When the fixing beam 71 is subjected to the expansion force of the battery cell 30, the force applied by the limit member 73 to the fixing seat 72 is directed from the outside to the direction of the accommodating groove 74. Since the limit member 73 is connected to one end of the fixing seat 72, the end of the fixing seat 72 away from the limit member 73 is likely to form a lever force directed from the inside of the accommodating groove 74 to the outside. The direction of the lever force is consistent with the direction of the expansion force of the battery cell 30, which is likely to have a negative impact on the connection stability between the fixing seat 72 and the fixing beam 71, and is likely to cause the connection between the fixing seat 72 and the fixing beam 71 to fail, and is likely to cause the end of the fixing seat 72 away from the limit member 73 to tilt. Making the size of the fixing seat 72 in the height direction of the fixing beam 71 smaller than the size of the fixing beam 71 can reduce the negative impact of the lever force on the connection stability between the fixing seat 72 and the fixing beam 71, thereby enhancing the connection strength between the fixing seat 72 and the fixing beam 71.

[0110] At the same time, it can be understood that the dimension of the fixing seat 72 in the height direction of the fixing beam 71 should not be too short, so that the fixing seat 72 and the fixing beam 71 can be fully in contact with each other, so that the fixing seat 72 and the fixing beam 71 have a strong connection strength.

[0111] In this embodiment, the dimension of the fixing groove 711 in the height direction of the fixing beam 71 is smaller than the dimension of the fixing beam 71, so that the dimension of the fixing seat 72 in the height direction of the fixing beam 71 can also be smaller than the dimension of the fixing beam 71, so as to reduce the negative influence of the lever force generated by the limiting member 73 on the fixing seat 72 on the connection stability between the fixing seat 72 and the fixing beam 71, thereby enhancing the connection strength between the fixing seat 72 and the fixing beam 71.

[0112] refer to Figure 4 , Figure 5 , Figure 6In some embodiments, along the thickness direction of the fixing beam 71 , the width of the fixing groove 711 gradually increases, and the width of the fixing seat 72 also gradually increases.

[0113] Figure 4 In the figure, the thickness direction of the fixed beam 71 is the direction of the X-axis, and the thickness direction of the fixed beam 71 is also the direction of the expansion force of the battery cell 30; the width direction of the fixed groove 711 is the direction of the Y-axis, and the width of the fixed groove 711 is the size of the fixed groove 711 in the Y-axis direction, and the width of the fixed seat 72 is the size of the fixed seat 72 in the Y-axis direction.

[0114] Since the width of the fixing groove 711 gradually increases, the fixing groove 711 may be a triangular groove, a trapezoidal groove or a gradually expanding groove of other shapes; and since the width of the fixing seat 72 gradually increases, the shape of the fixing seat 72 may be a triangular prism, a trapezoidal quadrangular prism or other shapes.

[0115] The width of the fixing groove 711 gradually increases, and accordingly, the inner wall of the fixing groove 711 can be a continuous surface inclined relative to the X-axis direction, and the inner wall of the fixing groove 711 can also be a step-like structure or other structures; and similar to the fixing groove 711, the outer wall of the fixing seat 72 can be a continuous surface inclined relative to the X-axis direction, and can also be a step-like structure or other structures.

[0116] Compared with making the inner wall of the fixing groove 711 parallel to the X-axis, this setting can increase the contact area between the fixing seat 72 and the inner wall of the fixing groove 711, so that the fixing seat 72 can be more fully in contact with the fixing beam 71, so that the connection strength between the fixing seat 72 and the fixing beam 71 is stronger; at the same time, this setting can also disperse the force received at the connection between the fixing seat 72 and the inner wall of the fixing groove 711 to other positions of the fixing beam 71, thereby reducing the force received at the connection between the fixing seat 72 and the inner wall of the fixing groove 711, and also reducing the concentration of force, so as to achieve the effect of enhancing the connection strength between the fixing seat 72 and the inner wall of the fixing groove 711.

[0117] In this embodiment, the fixing groove 711 is set to be gradually expanded in the direction away from the fixing groove 711, and the width of the fixing seat 72 is gradually increased, so that the shape of the fixing seat 72 can adapt to the shape of the fixing groove 711. This setting can further increase the contact area between the fixing seat 72 and the fixing beam 71, thereby further increasing the strength of the connection between the fixing seat 72 and the fixing beam 71; at the same time, this setting can also make the inner wall of the fixing groove 711 and the outer wall of the fixing seat 72 inclined relative to the direction of the expansion force. Because the fixing beam 71 has a tendency to deform away from the accommodating groove 74 when subjected to the expansion force of the battery cell 30, this setting can make the expansion force received at the connection between the fixing seat 72 and the fixing beam 71 form a component force perpendicular to the inner wall of the fixing groove 711 as a tensile force, and also form a component force along the inner wall of the fixing groove 711 as a shear force, so as to reduce the situation where the connection between the fixing seat 72 and the fixing groove 711 is only subjected to a single force and is easy to break, thereby further increasing the strength of the connection between the fixing seat 72 and the fixing beam 71.

[0118] refer to Figure 5 , Figure 6 In some embodiments, the shape of the fixing seat 72 is a triangular prism, a trapezoidal quadrangular prism or a semi-cylinder.

[0119] When the fixing seat 72 is a triangular prism, the bottom surface of the triangular prism faces the bottom wall of the box body 300 , and the tip of the triangular prism faces the receiving groove 74 .

[0120] When the fixing seat 72 is a trapezoidal quadrangular prism, the bottom surface of the trapezoidal quadrangular prism faces the bottom wall of the box body 300 , and the plane with a smaller area of ​​the trapezoidal quadrangular prism faces the receiving groove 74 .

[0121] When the fixing seat 72 is a semi-cylinder, the bottom surface of the semi-cylinder faces the bottom wall of the box body 300 , and the arc surface of the semi-cylinder faces the receiving groove 74 .

[0122] The fixing seat 72 is set to be in the shape of a triangular prism, a trapezoidal quadrangular prism or a semi-cylinder, so that the fixing seat 72 can disperse part of the force it is subjected to into the fixing beam 71, so as to reduce the force on the connection between the fixing seat 72 and the fixing beam 71, thereby increasing the strength of the connection between the fixing seat 72 and the fixing beam 71; at the same time, as the edges on the side walls where the fixing seat 72 and the fixing beam 71 are connected are reduced, the stress concentration phenomenon at the connection between the fixing seat 72 and the fixing beam 71 can also be reduced, thereby further increasing the strength of the connection between the fixing seat 72 and the fixing beam 71.

[0123] The present embodiment further provides some specific structures of the fixing seat 72 to increase the contact area between the fixing seat 72 and the fixing beam 71, thereby further increasing the strength of the connection between the fixing seat 72 and the fixing beam 71; at the same time, it can also better disperse and transmit the force exerted on the connection between the fixing seat 72 and the fixing beam 71 to the inside of the fixing beam 71, thereby further increasing the strength of the connection between the fixing seat 72 and the fixing beam 71.

[0124] refer to Figure 5 , Figure 6 In some embodiments, a weight-reducing groove 722 is provided on the fixing seat 72 .

[0125] The function of the weight-reducing groove 722 is to reduce the weight of the fixing seat 72. Accordingly, the weight-reducing groove 722 can be provided on the top surface or the bottom surface of the fixing seat 72, and the weight-reducing groove 722 should not be provided on the surface where the fixing seat 72 is connected to the fixing beam 71, so as to reduce the negative impact that the weight-reducing groove 722 may have on the connection strength between the fixing seat 72 and the fixing beam 71; the weight-reducing groove 722 can penetrate the fixing seat 72, and the weight-reducing groove 722 can also extend to the inside of the fixing seat 72; the weight-reducing groove 722 can be a square groove, a circular groove or a groove of other shapes; the number of the weight-reducing grooves 722 can be one, or two or more.

[0126] In this embodiment, the weight-reducing groove 722 is provided on the fixing seat 72 to reduce the weight of the fixing seat 72 , thereby reducing the negative impact of the setting of the fixing seat 72 on the overall weight of the box body 300 .

[0127] According to some embodiments of the present application, reference Figure 4 , Figure 4 This is a three-dimensional schematic diagram of the first box body 70 in the box body 300 provided in some embodiments of the present application.

[0128] In some embodiments of the present application, at least two fixing seats 72 are spaced apart on the fixed beam 71 along the length direction of the fixed beam 71. Specifically, the number of the fixing seats 72 may be two, three, four or more, and correspondingly, the number of the limiting members 73 also increases accordingly.

[0129] Due to limitations such as material strength and the connection strength between the fixing seat 72 and the fixing beam 71 , each fixing seat 72 and the limiting member 73 structure can only suppress the expansion force of the battery cell 30 to a limited extent. Therefore, multiple fixing seats 72 are provided to better enhance the force-bearing capacity of the fixing seat 72 and the limiting member 73 structure, thereby better suppressing the deformation of the fixing beam 71 .

[0130] In this embodiment, a plurality of fixing seats 72 are provided on the fixing beam 71 so that the fixing seats 72 and the limiting members 73 can better transmit the expansion force of the battery cells 30 exerted on the fixing beam 71 , thereby better suppressing the deformation of the fixing beam 71 .

[0131] According to some embodiments of the present application, the material of the fixing seat 72 is the same as that of the fixing beam 71; for example, the material of the fixing seat 72 and the fixing beam 71 can both be aluminum or aluminum alloy; for another example, the material of the fixing seat 72 and the fixing beam 71 can also be steel; it can be understood that the material of the fixing seat 72 and the fixing beam 71 can also be other materials, and is not limited to aluminum, aluminum alloy, steel and other materials.

[0132] This arrangement can facilitate welding of the fixing seat 72 and the fixing beam 71 , and can also facilitate transmission of force between the fixing seat 72 and the fixing beam 71 .

[0133] Because the fixing seat 72 and the fixing beam 71 are made of the same material, the fixing seat 72 and the fixing beam 71 can also have the same or similar deformation trends. If the deformation trends of the fixing seat 72 and the fixing beam 71 are different, it may cause the fixing seat 72 and the fixing beam 71 to have a tendency to relative displacement and form an internal force, which may make it easy for the connection between the fixing seat 72 and the fixing beam 71 to bear additional force in addition to the expansion force of the battery cell 30. Therefore, making the fixing seat 72 and the fixing beam 71 of the same material can also reduce the occurrence of additional force at the connection between the fixing seat 72 and the fixing beam 71 due to different deformation trends, thereby strengthening the connection strength between the fixing seat 72 and the fixing beam 71.

[0134] If the fixing seat 72 and the fixing beam 71 are made of different materials, it is easy for one of the fixing seat 72 and the fixing beam 71 to break or fail first, while the other of the fixing seat 72 and the fixing beam 71 has not yet reached the structural limit, which easily leads to insufficient use of the structure. Therefore, making the fixing seat 72 and the fixing beam 71 of the same material can also make full use of the structure and reduce the possibility of one of the fixing seat 72 and the fixing beam 71 failing first.

[0135] In this embodiment, the material of the fixing seat 72 is the same as that of the fixing beam 71 , so that the expansion force of the battery cell 30 can be more evenly distributed between the fixing seat 72 and the fixing beam 71 , and the occurrence of the fixing seat 72 or the fixing beam 71 breaking and failing first can be reduced.

[0136] According to some embodiments of the present application, reference Figures 5 to 8 ,in, Figure 5 for Figure 4 A partial enlarged schematic diagram of point A in the middle. Figure 6 for Figure 5 Schematic diagram of the exploded structure of the middle fixed beam 71 and the fixed seat 72, Figure 7 This is a top view of the battery 200 provided in some embodiments of the present application with the second box 80 removed. Figure 8 for Figure 7 A local enlarged schematic diagram of point B in the middle.

[0137] In some embodiments of the present application, the limiting member 73 is detachably connected to the corresponding fixing seat 72, and the detachable connection method can be a bolt connection, a snap connection or other detachable connection methods.

[0138] The limiting member 73 is detachably connected to the fixing seat 72 , so that the installation, removal and replacement of the limiting member 73 can be facilitated.

[0139] Making the limit member 73 detachably connected to the fixing seat 72 can also make it easier for the staff to apply a pre-tightening force to the limit frame before the limit member 73 is installed; for example, the staff can first apply a pulling force to both ends of the limit member 73, and then respectively install the two ends of the limit member 73 on the corresponding two fixing seats 72. At this time, after the limit member 73 is installed, the restoring force of the limit member 73 can apply a force from the outside toward the inside of the accommodating groove 74 to the fixing seat 72, thereby better suppressing the deformation of the fixed beam 71.

[0140] In this embodiment, the limit member 73 is detachably connected to the fixing seat 72 to facilitate the installation, removal and replacement of the limit member 73; at the same time, it is also convenient to apply a pre-tightening force on the limit member 73 in advance, so that the limit member 73 can better suppress the deformation of the fixed beam 71 through the pre-tightening force.

[0141] According to some embodiments of the present application, reference Figure 2 , Figure 4 ,in, Figure 2 Schematic diagram of the exploded structure of the battery 200 provided in some embodiments of the present application, Figure 4 This is a three-dimensional schematic diagram of the first box body 70 in the box body 300 provided in some embodiments of the present application.

[0142] In some embodiments of the present application, the box 300 further includes a first box 70 ; at least one fixed beam 71 constitutes a frame of the first box 70 , or each fixed beam 71 is located inside the first box 70 .

[0143] The first box body 70 refers to a part of the box body 300. The first box body 70 can independently define the storage space for accommodating the battery cell 30, and the first box body 70 can also cooperate with other structures to define the storage space for accommodating the battery cell 30. In addition to providing an installation basis for the battery cell 30, the first box body 70 can also provide a fixing basis for the fixed beam 71, the limit member 73 or other structures.

[0144] The first box body 70 may be made of metal, plastic or other materials; the first box body 70 may be in a rectangular parallelepiped, cylindrical or other shapes.

[0145] The fixed beam 71 can be used as a component inside the first box body 70 to enhance the strength of the first box body 70 and provide a fixing base for the fixing seat 72; the fixed beam 71 can also be used as a frame of the first box body 70 to reduce the occupation of the internal space of the first box body 70 by the fixed beam 71.

[0146] This embodiment provides some settings for the fixed beam 71, so that the fixed beam 71 can be a structural member inside the box body 300, so that the fixed beam 71 can also play a role in increasing the strength of the box body 300; at the same time, the fixed beam 71 can also serve as the frame of the box body 300, so as to reduce the occupation of the internal space of the box body 300 by the fixed beam 71.

[0147] refer to Figure 5 , Figure 6 In some embodiments, the stopper 73 is fixed to the fixing seat 72 by bolts. Specifically, the fixing seat 72 is provided with a threaded hole 721, and the stopper 73 is provided with a through hole. When the stopper 73 is installed, the through hole of the stopper 73 is aligned with the threaded hole 721 of the fixing seat 72, and then the bolt is passed through the through hole and threadedly engaged in the threaded hole 721.

[0148] According to some embodiments of the present application, three fixed beams 71 are evenly spaced in the first box body 70 , two fixed seats 72 are spaced apart on each fixed beam 71 , and both ends of the limiting member 73 are respectively connected to the fixed seats 72 of two adjacent fixed beams 71 .

[0149] In other embodiments, three fixed beams 71 are evenly spaced in the first box body 70, and no fixed seat 72 is provided on the middle fixed beam 71, while three fixed seats 72 are provided on the fixed beams 71 at both ends, and both ends of the limiting member 73 are respectively connected to the fixed seats 72 of the fixed beams 71 at both ends.

[0150] In some other embodiments, two fixed beams 71 are disposed in the first box body 70 at intervals, four fixed seats 72 are disposed on each fixed beam 71 at intervals, and both ends of the limiting member 73 are respectively connected to the fixed seats 72 on the two fixed beams 71 .

[0151] refer to Figure 2 , Figure 3In some embodiments, the battery 200 also includes a battery cell 30, which is disposed between two fixed beams 71; the battery cell 30 includes two oppositely disposed first surfaces 301 and two oppositely disposed second surfaces 302, the first surface 301 is adjacent to the second surface 302, and the area of ​​the first surface 301 is greater than the area of ​​the second surface 302; the first surface 301 faces the fixed beam 71.

[0152] The first surface 301 and the second surface 302 of the battery cell 30 both refer to the outer surfaces of the shell 33 thereof, wherein the first surface 301 is adjacent to the second surface 302 , and the area of ​​the first surface 301 is larger than that of the second surface 302 .

[0153] When the battery cell 30 is assembled in the first box body 70, the first surface 301 of the battery cell 30 is facing the fixed beam 71, that is, the side of the battery cell 30 with a larger area is facing the fixed beam 71; because when the battery cell 30 expands, the expansion deformation of the first surface 301 is greater, and the first surface 301 is opposite to the fixed beam 71, the deformation of the battery cell 30 can be better suppressed by the fixed beam 71, so as to reduce the occurrence of cracks in the shell 33 and breakage of the connecting aluminum bar due to excessive expansion of the battery cell 30.

[0154] In this embodiment, the first surface 301 with a larger area in the battery cell 30 is opposite to the fixed beam 71. Since the deformation of the first surface 301 with a larger area is usually larger, the expansion of the battery cell 30 can be better suppressed by the fixed beam 71 when the first surface 301 is opposite to the fixed beam 71.

[0155] refer to Figure 3 In some embodiments, the battery cell 30 further includes a pressure relief mechanism 34 , and the limiting member 73 and the pressure relief mechanism 34 are arranged alternately.

[0156] The pressure relief mechanism 34 may be provided on the end cover 31, and is used to release the internal pressure when the internal pressure or temperature of the battery cell 30 reaches a threshold value; the pressure relief mechanism 34 may be an explosion-proof valve, or a pressure relief valve, an explosion-proof cap, a fusible plug, or other devices with a pressure relief function; in some embodiments, the pressure relief mechanism 34 is an explosion-proof valve, which can be opened when the air pressure inside the shell 33 is greater than the pressure relief threshold, so that the gas in the shell 33 can be discharged to the outside, and the pressure relief threshold can be set according to the number, density, and layout of the electrode assemblies 32 in the battery cell 30, and according to the volume and material of the shell 33. In some embodiments, the pressure relief mechanism 34 may also be provided on any end surface of the shell 33, not limited to the end cover 31.

[0157] According to the function of the pressure relief mechanism 34 , the present embodiment arranges the limit members 73 and the pressure relief mechanism 34 of the battery cell 30 in an alternating manner to reduce the situation where the limit members 73 cover the pressure relief mechanism 34 and hinder the exhaust of the pressure relief mechanism 34 , thereby reducing the negative impact of the limit members 73 on the exhaust of the battery cell 30 .

[0158] In a second aspect, some embodiments of the present application further provide an electrical device 100, comprising a battery 200 provided in some embodiments of the first aspect.

[0159] The electric device 100 may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0160] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: A box body, the box body is used to accommodate the battery cells; At least two fixed beams, at least two of which are spaced apart on the box body, and a space for accommodating the battery cells is formed between two adjacent fixed beams; A fixing seat, arranged on the fixing beam; A limiting member, wherein the limiting member is connected to the fixing seats on different fixing beams.

2. The battery according to claim 1, characterized in that An accommodating groove can be formed between any two of the fixing beams, the battery cell is located in the accommodating groove, and the fixing seat is arranged on a side of the fixing beam away from the accommodating groove.

3. The battery according to claim 1, characterized in that The fixing beam is provided with a fixing groove, the fixing seat is accommodated in the fixing groove, and the fixing seat abuts against the inner wall of the fixing groove.

4. The battery according to claim 3, characterized in that Along the height direction of the fixing beam, the size of the fixing groove is smaller than the size of the fixing beam.

5. The battery according to claim 3, characterized in that Along the thickness direction of the fixing beam, the width of the fixing groove gradually increases, and the width of the fixing seat also gradually increases.

6. The battery according to claim 5, characterized in that The shape of the fixing seat is a triangular prism, a trapezoidal quadrangular prism or a semi-cylinder.

7. The battery according to any one of claims 1 to 6, characterized in that The fixing seat is provided with a weight-reducing groove.

8. The battery according to any one of claims 1 to 6, characterized in that At least two fixing seats are arranged at intervals on the fixing beam along the length direction of the fixing beam.

9. The battery according to any one of claims 1 to 6, characterized in that The material of the fixing seat is the same as that of the fixing beam.

10. The battery according to any one of claims 1 to 6, characterized in that: The limiting member is detachably connected to the corresponding fixing seat.

11. The battery according to any one of claims 1 to 6, characterized in that The box body also includes a first box body; At least one of the fixing beams forms a frame of the first box, or each of the fixing beams is located inside the first box.

12. The battery according to any one of claims 1 to 6, characterized in that The battery further comprises a battery cell, and the battery cell is arranged between two adjacent fixing beams; The side surface of the battery cell includes two first surfaces disposed opposite to each other and two second surfaces disposed opposite to each other, the first surface is adjacent to the second surface, and the area of ​​the first surface is larger than the area of ​​the second surface; The first surface faces the fixed beam.

13. The battery according to any one of claims 1 to 6, characterized in that: The battery cell further includes a pressure relief mechanism, and the limiting member and the pressure relief mechanism are arranged alternately.

14. An electrical device, characterized in that: Comprising the battery according to any one of claims 1 to 13.

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