Battery device and electric device

Abstract

The utility model is suitable for the technical field of batteries, and provides a battery device and a power utilization device. The battery monomer assembly comprises at least two battery monomers arranged along the first direction, each battery monomer comprises a first side surface and a second side surface, and the area of the first side surface is larger than that of the second side surface; the limiting beams are connected to the box body, and the limiting beams abut against the first side faces of the adjacent single batteries; each limiting beam comprises a first wall abutting against the corresponding battery cell, a reinforcing part is arranged on the side, away from the corresponding battery cell, of each first wall, and the reinforcing parts correspond to the middles, in the height direction and / or the width direction of the battery device, of the corresponding first side faces; according to the battery device provided by the embodiment of the invention, the reinforcer is arranged on the first wall of the limiting beam, and the reinforcer corresponds to the middle part of the first side surface along the height direction and / or the width direction, so that the deformation of the battery monomer can be better restrained in a targeted manner, and the capacity of the limiting beam for restraining the deformation of the battery monomer is further improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and in particular relates to a battery device and an electrical device. Background Technology

[0002] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0003] In current battery devices, the limiting beam is relatively weak, which makes it difficult to suppress the expansion of individual battery cells and cause deformation failure. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can alleviate the problem of deformation failure risk caused by insufficient strength of the limiting beam.

[0005] In a first aspect, embodiments of this application provide a battery device, including:

[0006] The enclosure has a receiving space; a battery cell assembly is housed in the receiving space, the battery cell assembly includes at least two battery cells arranged along a first direction, each battery cell includes two first sides and two second sides, the first sides and second sides alternate sequentially and are connected end to end, the area of ​​the first side is larger than the area of ​​the second side, and the first direction is perpendicular to the first side; a limiting beam is connected to the enclosure, the limiting beam is disposed on one side of the battery cell assembly along the first direction, and the limiting beam abuts against the first side of the adjacent battery cell; the limiting beam includes a first wall abutting against the battery cell, the side of the first wall opposite to the battery cell is provided with a reinforcing member, the reinforcing member corresponds to the middle of the corresponding first side along the height direction and / or width direction of the battery device.

[0007] In this embodiment, a reinforcing member is provided on the first wall of the limiting beam to improve the strength of the first wall and thus the strength of the entire limiting beam. This allows the limiting beam to better suppress the expansion of the battery cells and reduce the risk of deformation failure. Since the deformation of the battery cell is greatest at the middle of the first side, the reinforcing member is aligned with the middle of the first side along the height and / or width directions. This allows for more targeted suppression of the deformation of the battery cells and further enhances the limiting beam's ability to suppress battery cell deformation.

[0008] In some embodiments, the battery cell assembly comprises battery cells arranged in an array along a first direction and a second direction, the length direction of the limiting beam is parallel to the second direction, the second direction is perpendicular to the first direction; the reinforcing member has at least two, and the at least two reinforcing members correspond to adjacent battery cells respectively.

[0009] In the technical scheme of the embodiment, the reinforcing member has multiple, and each reinforcing member corresponds to a battery cell, so that the strength of the first wall at the position corresponding to each battery cell is improved by each reinforcing member respectively, thereby the deformation of the battery cell can be targetedly inhibited, and the ability of the limiting beam to inhibit the deformation of the battery cell can be better improved.

[0010] In some embodiments, the at least two reinforcing members are arranged at intervals along the second direction, and each reinforcing member corresponds to a different battery cell abutting against the limiting beam.

[0011] In the technical scheme of the embodiment, the reinforcing members are arranged at intervals, so that the reinforcing member can not only targetedly inhibit the deformation of the corresponding battery cell, but also reduce the volume of each reinforcing member, thereby the negative influence of the setting of the reinforcing member on the weight of the limiting beam can be reduced, and the processing cost of the limiting beam can be reduced.

[0012] In some embodiments, the length direction of the reinforcing member is parallel to a third direction, and the third direction, the first direction and the second direction are perpendicular to each other.

[0013] In the technical scheme of the embodiment, the length direction of the reinforcing member is parallel to the third direction, and in the case that the length direction of the limiting beam is parallel to the second direction, the setting makes the reinforcing member improve the strength of the first wall in the third direction to inhibit the deformation of the battery cell, and facilitates the reinforcing member to be arranged at intervals along the second direction.

[0014] In some embodiments, the reinforcing member comprises two first connecting portions connected to the first wall, and a first protruding portion connected between the two first connecting portions, the first protruding portion is protrudingly arranged in a direction away from the first wall to form a gap between the first protruding portion and the first wall.

[0015] The technical scheme of the embodiment provides a specific structure of some reinforcing members, so that the reinforcing member comprises the first connecting portion and the first protruding portion, so that the reinforcing member can form a structure similar to a box beam with the first wall, and the gap between the first protruding portion and the first wall can also play an energy absorption role, thereby the strength of the first wall at the reinforcing member is better improved.

[0016] In some embodiments, the first protruding portion corresponds to the middle of the corresponding first side along the height direction and / or the width direction of the battery device.

[0017] In the technical scheme of the embodiment, the first protruding part corresponds to the middle part of the first side face, so that the gap between the first protruding part and the first wall can absorb the deformation of the middle part of the first side face, and the first wall can have higher strength at the position corresponding to the middle part of the first side face under the action of the reinforcing member, so as to better inhibit the deformation of the battery monomer.

[0018] In some embodiments, the limiting beam further comprises a second wall and a third wall, a part of the second wall is connected to the side of the first wall away from the battery monomer, and another part of the second wall is connected to the reinforcing member; the third wall is connected to the side of the second wall away from the first wall.

[0019] The technical scheme of the embodiment provides specific structures of some limiting beams, the second wall and the third wall are provided, so that the limiting beam is a multi-layer structure comprising the first wall, the second wall and the third wall, so that the limiting beam can not only inhibit the deformation of the battery monomer, but also reduce the weight of the limiting beam.

[0020] In some embodiments, the second wall comprises a first main part, at least a part of the first main part is connected to the first wall; a mounting groove is arranged on the side of the first main part facing the first wall, and the first protruding part is connected to the inner wall of the mounting groove.

[0021] The technical scheme of the embodiment provides specific structures of some second walls, the mounting groove is arranged on the second wall to accommodate the reinforcing member through the mounting groove, so as to reduce the interference that the reinforcing member may cause to the connection of the second wall to the first wall; at the same time, the reinforcing member is connected to the inner wall of the mounting groove, so that the second wall can also improve the strength of the reinforcing member and share the force borne by the reinforcing frame, so that the second wall can also improve the strength of the first wall through the reinforcing member.

[0022] In some embodiments, the first main part deforms in the direction away from the first wall and forms a first reinforcing part, and the mounting groove is formed on the side of the first reinforcing part facing the first wall.

[0023] In the technical scheme of the embodiment, the first main part deforms to form the first reinforcing part and the mounting groove, so as to improve the strength of the second wall and the reinforcing member through the first reinforcing part, and accommodate the reinforcing member through the mounting groove; at the same time, this arrangement can also keep the thickness of the second wall consistent, improve the overall performance of the second wall, and reduce the risk of local stress concentration.

[0024] In some embodiments, the first reinforcing part has a plurality of first reinforcing parts, each of which corresponds to a different reinforcing member.

[0025] In the technical scheme of the embodiment, each first reinforcing part corresponds to each reinforcing member, so that the second wall can better improve the strength of each reinforcing member through each first reinforcing part.

[0026] In some embodiments, the first main body part is provided with a second reinforcing part on the side away from the first wall, and the second reinforcing part is connected to the third wall.

[0027] In the technical scheme of the embodiment, the second reinforcing part is arranged on the second wall to improve the strength of the second wall through the second reinforcing part, so that the second wall can better support the first wall and better share the force borne by the first wall and the reinforcing part, thereby improving the strength of the first wall; meanwhile, the second reinforcing part is connected to the third wall, so that the third wall can also share part of the force borne by the second wall, thereby making the third wall also share the force borne by the first wall and the reinforcing part, and further improving the strength of the first wall.

[0028] In some embodiments, the second reinforcing part is formed by deforming a part of the first main body part away from the first wall.

[0029] In the technical scheme of the embodiment, the first main body part is deformed to form the second reinforcing part, so that the second reinforcing part can improve the strength of the second wall; meanwhile, the arrangement can also keep the thickness of the second wall consistent, improve the overall performance of the second wall, and reduce the risk of local stress concentration.

[0030] In some embodiments, the second reinforcing part is located at the middle of the first main body part along a third direction, and the third direction is perpendicular to the first direction.

[0031] In the technical scheme of the embodiment, the second reinforcing part is located at the middle of the first main body part along the third direction, so that the second reinforcing part can correspond to the middle of the battery monomer along the third direction, so that the second wall can better strengthen the strength of the first wall at the middle of the third direction.

[0032] In some embodiments, the first main body part, the reinforcing part and the first wall are connected by welding.

[0033] In the technical scheme of the embodiment, the first main body part, the reinforcing part and the first wall are welded to improve the connection stability of the first main body part, the reinforcing part and the first wall, and reduce the risk of connection failure caused by the force borne by the first wall.

[0034] In some embodiments, the second wall includes a second connecting part connected to the first main body part, and the second connecting part extends away from the first wall and is connected to the third wall.

[0035] The technical scheme of the embodiment makes the second wall include the second connecting part, and makes the second connecting part deform in the direction away from the first wall and connect with the third wall, so that the first wall and the third wall can be indirectly connected through the second wall, and the third wall can also share the force borne by the first wall, thereby improving the strength of the first wall and improving the integrity of the limiting beam; meanwhile, the deformation of the second connecting part in the direction away from the first wall can also form a space between the second wall and the third wall, so as to better improve the strength of the limiting beam.

[0036] In some embodiments, the third wall includes a second main part and a third connecting part connected to the second main part, the third connecting part is connected to the second connecting part, and the third connecting part is also connected to the box body.

[0037] The technical scheme of the embodiment provides specific structures of the third wall, so that the third wall includes the second main part and the third connecting part, and the third connecting part is connected to the second connecting part, so that the second wall can be connected to the third wall.

[0038] In some embodiments, the third wall further includes a fourth connecting part connected to the second main part, the fourth connecting part and the third connecting part are respectively located on opposite sides of the second main part, and the fourth connecting part is connected to the first wall.

[0039] In the technical scheme of the embodiment, the third wall further includes the fourth connecting part, and the fourth connecting part is connected to the first wall, so that the third wall can be directly connected to the first wall, thereby making the third wall better share the force borne by the first wall, improving the strength of the first wall, and improving the integrity of the limiting beam.

[0040] In some embodiments, the fourth connecting part is bent from the second main part to the direction where the first wall is located; the first wall includes a third main part and a fifth connecting part connected to the third main part, the fifth connecting part is bent from the third main part to the direction where the third wall is located, so that the fifth connecting part and the fourth connecting part at least partially overlap.

[0041] In the technical scheme of the embodiment, the first wall includes the fifth connecting part, and the fifth connecting part is connected to the fourth connecting part, so that the third wall can be better connected to the first wall, the fourth connecting part is bent relative to the second main part, and the fifth connecting part is bent relative to the third main part, so as to form a space between the first wall and the third wall, thereby facilitating the provision of space for the second wall and the reinforcing member, and facilitating the improvement of the strength of the limiting beam; the fifth connecting part and the fourth connecting part at least partially overlap, so as to improve the connection strength between the fourth connecting part and the fifth connecting part.

[0042] In some embodiments, the limiting beams are at least two, and the at least two limiting beams are arranged at intervals along the first direction, and the battery monomer assembly is arranged between two adjacent limiting beams; the battery device further comprises a limiting member, two ends of the limiting member are connected to two different limiting beams respectively, and the limiting member is connected to the fourth connecting part and / or the fifth connecting part of the corresponding limiting beam.

[0043] In the technical scheme of the embodiment, the limiting member is arranged, two ends of the limiting member are connected to two limiting beams respectively, the strength of the limiting beam is assisted to be improved through the limiting member, and the limiting beam provides a pulling force directed to the battery monomer in the case of limiting the deformation of the battery monomer; meanwhile, the limiting member is connected to the fourth connecting part and / or the fifth connecting part, so that the limiting member can be more stably connected to the limiting beam.

[0044] In some embodiments, the first wall comprises a third main body part and a sixth connecting part connected to the third main body part, the sixth connecting part is further connected to the box, the sixth connecting part is bent from the third main body part to the direction where the battery monomer assembly is located, and the battery monomer assembly is pressed and held at least part of the sixth connecting part.

[0045] In the technical scheme of the embodiment, the first wall comprises the sixth connecting part, the sixth connecting part is bent to the direction where the battery monomer is located, and the battery monomer is pressed and held in the sixth connecting part, so that the sixth connecting part is fixed by the gravity of the battery monomer, the deformation of the first wall is limited by the pressure of the battery monomer on the sixth connecting part, and the strength of the first wall and the ability to suppress the deformation of the battery monomer are improved.

[0046] In some embodiments, the sixth connecting part is clamped to the box.

[0047] In the technical scheme of the embodiment, the sixth connecting part is clamped to the box, so as to facilitate the installation of the limiting beam.

[0048] In some embodiments, a fixing hole is formed on the sixth connecting part, and a fixing column inserted into the fixing hole is arranged on the box.

[0049] The technical scheme of the embodiment provides some specific structures of the sixth connecting part clamped to the box, a fixing hole is arranged on the sixth connecting part, and a corresponding fixing column is arranged on the box, so as to realize the clamping of the sixth connecting part; meanwhile, the fixing column can also bear part of the force borne by the first wall through the sixth connecting part, so as to improve the strength of the first wall and the ability of the limiting beam to suppress the deformation of the battery monomer.

[0050] In some embodiments, the fixing hole is a triangular hole, the fixing column is a triangular prism, and the shape of the fixing column is matched with the shape of the fixing hole.

[0051] The technical scheme of the embodiment provides specific shapes of the fixing hole and the fixing column, so that the fixing column and the fixing hole are both triangular structures, so that the fixing column can improve the strength of the first wall through the sixth connecting part and can also inhibit the torsional displacement between the fixing column and the fixing hole.

[0052] In some embodiments, the box is provided with a containing groove, and at least part of the sixth connecting part is contained in the containing groove.

[0053] In the technical scheme of the embodiment, at least part of the sixth connecting part is contained in the containing groove, so as to reduce the height of the sixth connecting part protruding from the box, thereby reducing the negative influence of the arrangement of the sixth connecting part on the arrangement of the battery monomer.

[0054] In a second aspect, the embodiment of the application further provides a battery device.

[0055] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, and the application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0056] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the scope of the application. Moreover, the same reference numerals in the attached drawings indicate the same or similar elements. In the drawings:

[0057] Figure 1 The structural schematic diagram of a vehicle provided by some embodiments of the application is shown in the figure;

[0058] Figure 2 The exploded structural schematic diagram of a battery device provided by some embodiments of the application is shown in the figure;

[0059] Figure 3 The exploded structural schematic diagram of a battery monomer provided by some embodiments of the application is shown in the figure;

[0060] Figure 4 The top view schematic diagram of a battery device provided by some embodiments of the application is shown in the figure after removing the top cover;

[0061] Figure 5 The top view schematic diagram of a battery device provided by some embodiments of the application is shown in the figure after removing the top cover; Figure 4 The sectional view schematic diagram of the line A-A in the figure;

[0062] Figure 6 The sectional view schematic diagram of the line A-A in the figure; Figure 5 The local enlarged schematic diagram of B in the figure;

[0063] Figure 7 A perspective view of a case provided for some embodiments of the present application;

[0064] Figure 8 A perspective view of a case provided for some embodiments of the present application; Figure 7 A partial enlarged view at C;

[0065] Figure 9 An exploded structural view of a limiting beam provided for some embodiments of the present application;

[0066] Figure 10 A perspective view of a case provided for some embodiments of the present application; Figure 9 A partial enlarged view at D;

[0067] Figure 11 A front view of a first wall and a reinforcing member provided for some embodiments of the present application.

[0068] The meanings of the labels in the figures are as follows:

[0069] 1000, vehicle;

[0070] 100, battery device;

[0071] 10, case; 11, first case; 12, second case; 13, bottom plate; 14, fixing column; 15, accommodating groove;

[0072] 20, battery cell assembly; 21, battery cell; 211, shell; 2111, first side; 2112, second side; 212, end cover; 213, electrode assembly; 214, electrode terminal;

[0073] 30, limiting beam; 31, first wall; 311, third main body part; 312, fifth connecting part; 313, sixth connecting part; 3131, fixing hole; 32, reinforcing member; 321, first connecting part; 322, first protruding part; 33, second wall; 331, first main body part; 3311, mounting groove; 3312, first reinforcing part; 3313, second reinforcing part; 332, second connecting part; 34, third wall; 341, second main body part; 342, third connecting part; 343, fourth connecting part;

[0074] 200, motor;

[0075] 300, controller. DETAILED DESCRIPTION

[0076] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise noted, the terms "including" and "comprising" are open-ended and do not exclude the presence of unrecited elements or limitations.

[0078] 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 "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0079] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0080] 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, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0081] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0082] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application. The orientation or position of the device or element indicated, and therefore cannot be understood as limiting the embodiments of the present application.

[0083] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled 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.

[0084] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined to form new technical solutions.

[0085] Unless otherwise specified, all technical features and optional technical features of the present application can be combined to form new technical solutions.

[0086] At present, from the development of market situation, the application of battery device is more and more widely. The battery device is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, the demand of its market is also increasing.

[0087] In the charging and discharging cycle process of the battery device, the battery monomer is prone to periodic expansion, and the expansion deformation of the middle part of the side with larger area of the battery monomer is the largest; and the expansion of the battery monomer leads to the risk of short circuit of the positive and negative plates in the battery monomer, and also leads to the risk of rupture of the battery monomer shell.

[0088] In order to inhibit the expansion deformation of the battery monomer in the charging and discharging cycle process, the current battery device usually has a limiting beam abutting against the battery monomer, so as to inhibit the expansion deformation of the battery monomer by the limiting beam.

[0089] In the current battery device, there is a box formed by sheet metal process, and the strength of the limiting beam for limiting the deformation of the battery monomer in such box is usually weak, and the ability of the limiting beam to inhibit the deformation of the battery monomer is usually poor.

[0090] In order to alleviate the problem of insufficient strength of the limiting beam leading to the risk of deformation failure, the present application provides a battery device, which sets a limiting beam, so that the limiting beam comprises a first wall, and the first wall abuts against the battery monomer to limit the expansion deformation of the battery monomer by the first wall; a reinforcing member is arranged on the side of the first wall away from the battery monomer, and the reinforcing member corresponds to the middle part of the first side with larger area of the battery monomer along the height direction and / or width direction of the battery device.

[0091] Because the expansion deformation amount of the battery monomer in the middle of the first side with a larger area is the largest, the reinforcing member corresponds to the middle of the first side with a larger area of the battery monomer in the height direction and / or the width direction of the battery device. In such a battery monomer, the reinforcing member can better inhibit the deformation of the battery monomer by reinforcing the strength of the first wall corresponding to the middle of the first side of the battery monomer in the height direction and / or the width direction of the battery device, thereby further improving the ability of the limiting beam to inhibit the deformation of the battery monomer.

[0092] The battery device disclosed in the embodiments of the present application can be used in a power consumption device using the battery device as a power supply or a variety of energy storage systems using the battery device as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0093] The following embodiments are described with reference to a power consumption device of an embodiment of the present application as an example of a vehicle 1000 for convenience of description.

[0094] Reference Figure 1 , Figure 1 A structural schematic diagram of the vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or an extended range car, etc. The vehicle 1000 is internally provided with a battery, which can be arranged at the bottom, head, or tail of the vehicle 1000. The battery can be used for power supply of the vehicle 1000, for example, the battery can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 300 and a motor 200, and the controller 300 is used to control the battery to supply power to the motor 200, for example, to meet the power demand of the vehicle 1000 during starting, navigation, and driving.

[0095] In some embodiments of the present application, the battery can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0096] Reference Figure 2 , Figure 2An exploded view of a battery device 100 is provided for some embodiments of the present application. The battery device 100 referred to in embodiments of the present application can include one or more battery cell assemblies 20 for providing voltage and capacity. The battery cell assembly 20 can include a plurality of battery cells 21 connected in series, in parallel, or in a mixed connection through busbar components.

[0097] In some embodiments, the battery cell assembly 20 is generally formed by an arrangement of a plurality of battery cells 21.

[0098] As an example, the battery cell assembly 20 can be a battery module formed by an arrangement and fixation of a plurality of battery cells 21 into a single module. As an example, the battery module can be formed by bundling a plurality of battery cells 21 with a cable tie.

[0099] In some embodiments, the battery device 100 can be a battery pack including a housing 10 and one or more battery cell assemblies 20 housed in the housing 10.

[0100] As an example, the battery cell assembly 20 can be a battery module, and the battery cell assembly 20 can be housed in the housing 10 by fixing the battery module in the housing 10.

[0101] As an example, the battery cell assembly 20 can also be housed in the housing 10 by directly fixing a plurality of battery cells 21 in the housing 10.

[0102] As an example, the housing 10 can include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are coupled so that an enclosed space is formed inside the housing 10 to house the battery cell assembly 20. The enclosed here means covered or closed, which can be sealed or unsealed. The first housing 11 can be a top cover or a bottom plate 13.

[0103] As an example, the housing 10 can include a top cover, a frame, and a bottom plate 13. The top cover and the bottom plate 13 are respectively connected to the frame so that an enclosed space is formed inside the housing 10 to house the battery cell assembly 20.

[0104] In some embodiments, the housing 10 can be part of a chassis structure of a vehicle 1000. For example, part of the housing 10 can be at least part of a floor of the vehicle 1000, or part of the housing 10 can be at least part of a cross beam and a longitudinal beam of the vehicle 1000.

[0105] Reference Figure 3 , Figure 3A decomposition structure diagram of a battery cell 21 is provided for some embodiments of the present application. The battery cell 21 refers to the smallest unit that constitutes a battery. As shown in the diagram, the battery cell 21 includes an end cover 212, a shell 211, an electrode assembly 213, and other functional components.

[0106] The end cover 212 refers to a component that covers the opening of the shell 211 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cover 212 can be adapted to the shape of the shell 211 to fit the shell 211. Alternatively, the end cover 212 can be made of a material with certain hardness and strength, such as an aluminum alloy, so that the end cover 212 is less likely to deform when subjected to extrusion and collision, allowing the battery cell 21 to have higher structural strength and improved safety performance. The end cover 212 can be provided with functional components such as an electrode terminal 214. The electrode terminal 214 can be used to electrically connect with the electrode assembly 213 for outputting or inputting the electrical energy of the battery cell 21. In some embodiments, the end cover 212 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 21 when the internal pressure or temperature reaches a threshold value. The material of the end cover 212 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not specially limited in the embodiments of the present application. In some embodiments, an insulating piece can also be provided on the inner side of the end cover 212, which can be used to isolate the electrical connection components in the shell 211 from the end cover 212 to reduce the risk of short circuit. For example, the insulating piece can be plastic, rubber, etc.

[0107] The shell 211 is a component used to fit the end cover 212 to form the internal environment of the battery cell 21, wherein the formed internal environment can be used to accommodate the electrode assembly 213, the electrolyte, and other components. The shell 211 and the end cover 212 can be independent components, and an opening can be provided on the shell 211, and the end cover 212 is made to cover the opening to form the internal environment of the battery cell 21. Without limitation, the end cover 212 and the shell 211 can also be integrated, specifically, the end cover 212 and the shell 211 can first form a common connecting surface before other components enter the shell, and then the end cover 212 is made to cover the shell 211 when it is necessary to seal the internal environment of the shell 211. The shell 211 can be various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell 211 can be determined according to the specific shape and size of the electrode assembly 213. The material of the shell 211 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not specially limited in the embodiments of the present application.

[0108] The electrode assembly 213 is a component in which an electrochemical reaction occurs in the battery cell 21. One or more electrode assemblies 213 can be included inside the case 211. The electrode assembly 213 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly 213, and portions without active materials that each constitute a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminal 214 to form a current loop.

[0109] In a first aspect, with reference to Figure 4 to Figure 6 In some embodiments of the present application, a battery device 100 is provided, which includes a box 10, a battery cell assembly 20, and a limiting beam 30. The box 10 has an accommodation space. The battery cell assembly 20 is accommodated in the accommodation space. The battery cell assembly 20 includes at least two battery cells 21 arranged along a first direction. The battery cell 21 includes two first sides 2111 and two second sides 2112. The first sides 2111 and the second sides 2112 are alternately arranged in sequence and connected end to end. The area of the first side 2111 is greater than the area of the second side 2112. The first direction is perpendicular to the first side 2111. The limiting beam 30 is connected to the box 10. The limiting beam 30 is arranged on one side of the battery cell assembly 20 along the first direction. The limiting beam 30 abuts against the first side 2111 of the adjacent battery cell 21. The limiting beam 30 includes a first wall 31 abutting against the battery cell 21. The first wall 31 is provided with a reinforcing member 32 on a side away from the battery cell 21. The reinforcing member 32 corresponds to the middle part of the corresponding first side 2111 along the height direction and / or the width direction of the battery device 100.

[0110] In the figure, the direction of the X-axis is the length direction of the battery device 100, the direction of the Y-axis is the width direction of the battery device 100, and the direction of the Z-axis is the height direction of the battery device 100.

[0111] The box 10 refers to a structure in the battery device 100 for providing an accommodation space for the battery cell 21 and other structures. The shape of the box 10 can be prismatic, cylindrical, or other shapes. The material of the box 10 can include metal, plastic, or other materials.

[0112] The accommodation space refers to a space structure in the box 10 for accommodating the battery cell 21 and other structures. The accommodation space is formed in the box 10. The accommodation space can be a prismatic space structure, a cylindrical space structure, or a space structure of other shapes. The shape of the accommodation space can also be set according to the shape of the box 10.

[0113] The battery cell assembly 20 refers to a structure composed of battery cells 21, the battery cell 21 refers to the smallest unit constituting the battery device 100, the battery cell assembly 20 can include two battery cells 21, or three or more battery cells 21; in the case where the battery cell assembly 20 includes two or more battery cells 21, each battery cell 21 in the battery cell assembly 20 can be connected in series, in parallel, or in a mixed connection; each battery cell 21 in the battery cell assembly 20 can be fixed and constrained by a binding belt, a plate body, or other structures, and each battery cell 21 in the battery cell assembly 20 can also be directly arranged in the accommodation space of the box body 10.

[0114] At least two battery cells 21 in the battery cell assembly 20 are arranged along the first direction, and the battery cells 21 in the battery cell assembly 20 can be arranged along other directions in addition to the first direction.

[0115] The first direction can be the length direction of the battery device 100, or the width direction of the battery device 100 or other directions; for example, the first direction is the length direction X of the battery device 100.

[0116] The first side surface 2111 and the second side surface 2112 respectively refer to different side surfaces of the battery cell 21, according to the shape of the battery cell 21, the first side surface 2111 can be a plane, or an arc surface or a surface of other shapes, and the second side surface 2112 can be a plane, or an arc surface or a surface of other shapes; two first side surfaces 2111 and two second side surfaces 2112 are alternately connected in sequence, so that the two first side surfaces 2111 and the two second side surfaces 2112 can surround the circumferential surface of the battery cell 21.

[0117] The area of the first side surface 2111 is greater than the area of the second side surface 2112, that is, the first side surface 2111 is the side surface with a larger area among the circumferential surfaces of the battery cell 21; because the area of the first side surface 2111 is greater than the area of the second side surface 2112, the deformation amount of the first side surface 2111 is greater than the deformation amount of the second side surface 2112 during the charging and discharging cycle of the battery cell 21; at the same time, the deformation amount of the first side surface 2111 gradually increases from its edge to the middle position, that is, the deformation amount of the first side surface 2111 away from the middle position of the edge is larger.

[0118] The first direction is perpendicular to the first side surface 2111, and for each battery cell 21 arranged in the first direction, the two first side surfaces 2111 of each battery cell 21 are also arranged along the first direction.

[0119] The limiting beam 30 refers to a beam structure arranged in the accommodating space. The limiting beam 30 can be an I-beam, a box beam or other shaped beam structure. The number of limiting beams 30 can be one, two or more. The limiting beam 30 is connected to the box body 10. The limiting beam 30 can be connected to the frame structure of the box body 10 or the bottom plate 13 of the box body 10. The limiting beam 30 can be connected to the box body 10 by bonding, welding, screwing or other means. The material of the limiting beam 30 can include metal, plastic or other materials.

[0120] When the number of limiting beams 30 is two or more and the number of battery monomer assemblies 20 is two or more, each battery monomer assembly 20 can be located between the same two limiting beams 30. When the number of limiting beams 30 is three or more, any two adjacent limiting beams 30 can be provided with a battery monomer assembly 20.

[0121] The limiting beam 30 is arranged on one side of the battery monomer assembly 20 along the first direction, that is, the limiting beam 30 corresponds to the first side surface 2111 of the adjacent battery monomer 21. The limiting beam 30 abuts against the adjacent battery monomer 21, so that the limiting beam 30 can inhibit the swelling deformation of the battery monomer 21. The limiting beam 30 abuts against the first side surface 2111 of the adjacent battery monomer 21 to limit the deformation of the first side surface 2111 with a larger deformation amount.

[0122] The first wall 31 refers to a wall surface of the limiting beam 30 abutting against the adjacent battery monomer 21. The first wall 31 can be a square plate structure, a circular plate structure or other shaped structure. The material of the first wall 31 can include metal, plastic or other materials.

[0123] The reinforcing member 32 refers to a structure for improving the strength of the first wall 31 in the limiting beam 30. The reinforcing member 32 can be a strip-shaped structure, a columnar structure or other shaped structure. The number of reinforcing members 32 can be one, two or more. The reinforcing member 32 is connected to the first wall 31. The reinforcing member 32 can be connected to the first wall 31 by bonding, welding or other means. The reinforcing member 32 can also be integrally formed with the first wall 31. The material of the reinforcing member 32 can include metal, plastic or other materials.

[0124] The reinforcing member 32 is arranged on the side of the first wall 31 away from the battery monomer 21 to improve the strength of the first wall 31 and reduce the interference of the arrangement of the reinforcing member 32 on the arrangement of the battery monomer 21.

[0125] The position of the reinforcing member 32 can correspond to the middle of the first side surface 2111 in the height direction Z of the battery device 100, that is, the reinforcing member 32 can be a structural member with the length direction parallel to the width direction Y of the battery device 100 to inhibit the deformation of the first side surface 2111 in the middle of the height direction Z of the battery device 100; at this time, the reinforcing member 32 can be a long strip-shaped structural member, and one reinforcing member 32 can correspond to the first side surface 2111 of a plurality of battery monomers 21.

[0126] The position of the reinforcing member 32 can also correspond to the middle of the first side surface 2111 in the width direction Y of the battery device 100, that is, the reinforcing member 32 can be a structural member with the length direction parallel to the height direction Z of the battery device 100 to inhibit the deformation of the first side surface 2111 in the middle of the width direction Y of the battery device 100; at this time, the reinforcing member 32 can be a long strip-shaped structural member, and the number of reinforcing members 32 is multiple, so that the plurality of reinforcing members 32 correspond to the first side surface 2111 of each battery monomer 21 one by one.

[0127] The position of the reinforcing member 32 can also correspond to the middle of the first side surface 2111 in the width direction Y and the height direction Z of the battery device 100, that is, the reinforcing member 32 can correspond to the central part of the first side surface 2111, and at this time, the reinforcing member 32 can be a block-shaped structure to inhibit the deformation of the central part of the first side surface 2111; at this time, the reinforcing member 32 can be a block-shaped structural member, and the number of reinforcing members 32 is multiple, so that the plurality of reinforcing members 32 correspond to the first side surface 2111 of each battery monomer 21 one by one.

[0128] Since the deformation amount of the first side surface 2111 gradually increases from the edge to the middle position, that is, the deformation amount of the first side surface 2111 far from the edge is larger, the reinforcing member 32 corresponds to the middle of the first side surface 2111 in the width direction Y and / or the height direction Z of the battery device 100, so that the reinforcing member 32 can be used to specifically inhibit the part of the first side surface 2111 with larger deformation amount, thereby improving the ability of the first wall 31 to inhibit the deformation of the battery monomer 21 and improving the strength of the first wall 31.

[0129] In the embodiment, the reinforcing member 32 is arranged on the first wall 31 of the limiting beam 30 to improve the strength of the first wall 31 by the reinforcing member 32, and thus the strength of the entire limiting beam 30 is improved, so that the limiting beam 30 can better inhibit the expansion of the battery monomer 21 and reduce the risk of deformation failure of the limiting beam 30; since the deformation amount of the battery monomer 21 in the middle of the first side surface 2111 is the largest, the reinforcing member 32 corresponds to the middle of the first side surface 2111 in the height direction and / or the width direction, so that the deformation of the battery monomer 21 can be specifically and better inhibited, and the ability of the limiting beam 30 to inhibit the deformation of the battery monomer 21 is further improved.

[0130] ReferenceFigure 7 to Figure 9 In some embodiments, the battery cell assembly 20 comprises battery cells 21 arranged in a first direction and a second direction, the length direction of the limiting beam 30 is parallel to the second direction, and the second direction is perpendicular to the first direction; the reinforcing member 32 has at least two, and the at least two reinforcing members 32 correspond to adjacent battery cells 21 respectively.

[0131] The battery cells 21 are arranged in the first direction and the second direction to form the battery cell assembly 20; in the case that the limiting beam 30 is arranged on one side of the battery cell assembly 20 along the first direction, the limiting beam 30 abuts a row of battery cells 21 arranged along the second direction at the adjacent edges of the battery cell assembly 20.

[0132] The second direction can be the width direction Y of the battery device 100, or the length direction X of the battery device 100 or other directions; for example, the second direction is the width direction Y of the battery device 100, and the first direction is the length direction X of the battery device 100.

[0133] The reinforcing member 32 has at least two, and the number of reinforcing members 32 can be two, or three or more; the at least two reinforcing members 32 correspond to adjacent battery cells 21 respectively, and one reinforcing member 32 can correspond to only one battery cell 21, or two or more battery cells 21, so as to more targetedly improve the performance of the first wall 31 in inhibiting the deformation of the battery cell 21.

[0134] In the case that the reinforcing member 32 corresponds to the middle part of the first side surface 2111 of the adjacent battery cell 21 along the width direction Y and / or the height direction Z of the battery device 100, the reinforcing member 32 can correspond to the part with larger deformation amount of the first side surface 2111, and can improve the strength of the first wall 31 at the part with larger deformation amount of the first side surface 2111, so as to more targetedly improve the performance of the first wall 31 in inhibiting the deformation of the battery cell 21.

[0135] For example, in the case that the reinforcing member 32 corresponds to the middle part of the first side surface 2111 of the adjacent battery cell 21 along the width direction Y of the battery device 100, the number of reinforcing members 32 can be the same as the number of battery cells 21 abutting the first wall 31, and in this case, each reinforcing member 32 corresponds to each battery cell 21 abutting the first wall 31 one by one.

[0136] For example, in the case that the reinforcing member 32 corresponds to the middle part of the first side surface 2111 of the adjacent battery cell 21 along the height direction Z of the battery device 100, the number of reinforcing members 32 can be the same as the number of battery cells 21 abutting the first wall 31, or different; in the case that the number of reinforcing members 32 is different from the number of battery cells 21 abutting the first wall 31, one reinforcing member 32 can correspond to two or more battery cells 21 in the second direction.

[0137] In the example, in the case where the reinforcing member 32 corresponds to the middle of the first side surface 2111 of the adjacent battery cell 21 along the width direction Y and the height direction Z of the battery device 100, the number of the reinforcing members 32 can be the same as the number of the battery cells 21 abutting against the first wall 31, or can be different; in the case where the number of the reinforcing members 32 is different from the number of the battery cells 21 abutting against the first wall 31, one reinforcing member 32 can correspond to two or more battery cells 21 in the second direction.

[0138] In the embodiment, the reinforcing member 32 is provided in plurality, and each reinforcing member 32 corresponds to each battery cell 21, so as to respectively improve the strength of the part of the first wall 31 corresponding to each battery cell 21 by each reinforcing member 32, thereby being able to specifically suppress the deformation of the battery cell 21, and being able to better improve the ability of the limiting beam 30 to suppress the deformation of the battery cell 21.

[0139] Reference Figure 7 to Figure 9 In some embodiments, the at least two reinforcing members 32 are arranged in the second direction with intervals, and each reinforcing member 32 corresponds to a different battery cell 21 abutting against the limiting beam 30.

[0140] Each reinforcing member 32 corresponds to a different battery cell 21 abutting against the limiting beam 30, that is, the orthographic projection of each reinforcing member 32 corresponding to the first side surface 2111 respectively falls on each first side surface 2111, so that each reinforcing member 32 can correspond to the strength of the first wall 31 at the battery cell 21 corresponding to the reinforcing member 32, thereby being able to more specifically suppress the deformation of each battery cell 21, and being able to improve the strength of the first wall 31.

[0141] In the example, in the case where the limiting beam 30 is arranged in the second direction, the first wall 31 is arranged along a row of battery cells 21 abutting against the edge of the battery cell assembly 20 and arranged in the second direction, at this time, a plurality of reinforcing members 32 are arranged in the second direction with intervals on the side of the first wall 31 away from the battery cell 21, and each reinforcing member 32 corresponds to each battery cell 21 one by one.

[0142] The reinforcing members 32 are arranged in the second direction with intervals, so as to reduce the volume of each reinforcing member 32, so that the reinforcing member 32 can not only improve the strength of the first wall 31 and specifically suppress the deformation of the corresponding battery cell 21, but also reduce the space occupation of the reinforcing member 32, and reduce the weight of the reinforcing member 32, thereby being able to reduce the negative impact of the arrangement of the reinforcing member 32 on the weight of the limiting beam 30, and further being able to reduce the negative impact of the arrangement of the reinforcing member 32 on the weight of the battery device 100.

[0143] In the embodiment, the reinforcing members 32 are arranged at intervals so that the reinforcing members 32 can not only suppress the deformation of the corresponding battery monomers 21, but also reduce the volume of the reinforcing members 32, thereby reducing the negative impact of the reinforcing members 32 on the weight of the limiting beam 30 and reducing the processing cost of the limiting beam 30.

[0144] With reference to Figure 7 to Figure 9 In some embodiments, the length direction of the reinforcing member 32 is parallel to the third direction, and the third direction, the first direction and the second direction are perpendicular to each other.

[0145] The length direction of the reinforcing member 32 is parallel to the third direction, which can be the height direction Z of the battery device 100 or other directions; for example, the third direction is the height direction of the battery device 100.

[0146] In the case where the length direction of the limiting beam 30 is parallel to the second direction, this arrangement enables the reinforcing member 32 to improve the strength of the first wall 31 in the third direction; in the case where the reinforcing member 32 corresponds to each battery monomer 21, this arrangement not only enables the reinforcing member 32 to correspond to the battery monomer 21 to suppress the deformation of the battery monomer 21, but also facilitates the interval arrangement of the reinforcing member 32.

[0147] In the embodiment, the length direction of the reinforcing member 32 is parallel to the third direction, and in the case where the length direction of the limiting beam 30 is parallel to the second direction, this arrangement enables the reinforcing member 32 to improve the strength of the first wall 31 in the third direction to suppress the deformation of the battery monomer 21 and facilitates the interval arrangement of the reinforcing member 32 along the second direction.

[0148] With reference to Figure 9 to Figure 11 In some embodiments, the reinforcing member 32 comprises two first connecting portions 321 connected to the first wall 31, and a first protruding portion 322 connected between the two first connecting portions 321, the first protruding portion 322 is arranged in a direction away from the first wall 31 to form an interval between the first protruding portion 322 and the first wall 31.

[0149] The first connecting portion 321 refers to the part of the reinforcing member 32 connected to the first wall 31, which can be square, circular or other shaped structures; the first connecting portion 321 is connected to the first wall 31, which can be connected to the first wall 31 by adhesion, welding, screwing or other means; the material of the first connecting portion 321 can include metal, plastic or other materials.

[0150] The first protruding part 322 refers to a part of the reinforcing part 32 spaced apart from the first wall 31, and the first protruding part 322 is protruding away from the first direction to form a gap between the first protruding part 322 and the first wall 31; the first protruding part 322 is connected to the first connecting part 321, and the first protruding part 322 can be connected to the first connecting part 321 by bonding, welding or other means, or the first protruding part 322 can be integrally formed with the first connecting part 321; the material of the first protruding part 322 can include metal, plastic or other materials, and the material of the first protruding part 322 can be the same as or different from that of the first connecting part 321.

[0151] The first connecting part 321 has two, and the first protruding part 322 is located between the two first connecting parts 321, that is, the opposite sides of the first protruding part 322 are connected to the two first connecting parts 321, and the two first connecting parts 321 can be on both sides of the first protruding part 322 along the second direction, or on both sides of the first protruding part 322 along the third direction.

[0152] For example, the first protruding part 322 and the first connecting part 321 are integrally formed, and the middle part of the reinforcing part 32 deforms away from the first wall 31 to form the first protruding part 322, and two first connecting parts 321 can be formed on both sides of the first protruding part 322.

[0153] The reinforcing part 32 includes the first protruding part 322 to form a small box beam structure with the first wall 31 at the position of the reinforcing part 32, so as to improve the strength of the part of the first wall 31 corresponding to the first protruding part 322, so that the first wall 31 can better suppress the deformation of the battery monomer 21.

[0154] The embodiment provides some specific structures of the reinforcing part 32, so that the reinforcing part 32 includes the first connecting part 321 and the first protruding part 322, so that the reinforcing part 32 can form a box beam structure with the first wall 31, and the gap between the first protruding part 322 and the first wall 31 can also play a role in energy absorption, so as to better improve the strength of the first wall 31 at the reinforcing part 32.

[0155] Reference Figure 9 to Figure 11 In some embodiments, the first protruding part 322 corresponds to the middle part of the corresponding first side surface 2111 along the height direction and / or the width direction of the battery device 100.

[0156] The first protruding portion 322 corresponds to the middle portion of the corresponding first side surface 2111 along the height direction Z and / or the width direction Y of the battery device 100, that is, the orthographic projection of the first protruding portion 322 on the corresponding first side surface 2111 falls on the middle portion of the first side surface 2111 along the height direction Z and / or the width direction Y of the battery device 100.

[0157] According to the specific structure of the reinforcing member 32, the first protruding portion 322 can correspond to the middle portion of the corresponding first side surface 2111 along the height direction Z or the width direction Y of the battery device 100; the first protruding portion 322 can also correspond to the middle portion of the corresponding first side surface 2111 along the height direction Z and the width direction Y of the battery device 100, that is, the first protruding portion 322 corresponds to the central portion of the first side surface 2111.

[0158] Because the deformation amount of the middle portion of the first side surface 2111 along the width direction Y and / or the height direction Z of the battery device 100 is large, and because the strength of the portion of the first wall 31 corresponding to the first protruding portion 322 is high, the first protruding portion 322 corresponds to the middle portion of the first side surface 2111 along the height direction Z and / or the width direction Y of the battery device 100, so that the portion of the first wall 31 with high strength can correspond to the portion of the first side surface 2111 with large deformation amount, thereby more targetedly inhibiting the portion of the first side surface 2111 with large deformation amount, and improving the ability of the first wall 31 to inhibit the deformation of the battery monomer 21, and improving the strength of the first wall 31.

[0159] Because the deformation amount of the middle portion of the first side surface 2111 is the largest, the first protruding portion 322 corresponds to the middle portion of the first side surface 2111, so that the gap between the first protruding portion 322 and the first wall 31 can absorb the deformation amount of the middle portion of the first side surface 2111, and the first wall 31 can have higher strength at the portion corresponding to the middle portion of the first side surface 2111 under the action of the reinforcing member 32, so as to better inhibit the deformation of the battery monomer 21.

[0160] Reference Figure 9 In some embodiments, the limiting beam 30 further comprises a second wall 33 and a third wall 34, one portion of the second wall 33 is connected to the side of the first wall 31 away from the battery monomer 21, and the other portion of the second wall 33 is connected to the reinforcing member 32; the third wall 34 is connected to the side of the second wall 33 away from the first wall 31.

[0161] The second wall 33 refers to the part of the limiting beam 30 connected with the first wall 31, and the second wall 33 can share part of the force borne by the first wall 31 to improve the strength of the first wall 31; the second wall 33 can be a square plate structure, or a circular plate structure or other shape structure; the second wall 33 is connected with the first wall 31, and the second wall 33 can be connected with the first wall 31 by welding, bonding or other ways; the material of the second wall 33 can include metal, plastic or other materials.

[0162] The second wall 33 is connected with the first wall 31 on the side away from the battery monomer assembly 20, so that the second wall 33 can not only improve the strength of the first wall 31, but also reduce the interference of the second wall 33 on the arrangement of the battery monomer 21; there can be a gap between the second wall 33 and the first wall 31 to form an energy absorption space, and the limiting beam 30 is similar to a box beam structure to further improve the strength of the limiting beam 30.

[0163] Since the reinforcing member 32 and the second wall 33 are both arranged on the side of the first wall 31 away from the battery monomer 21, part of the second wall 33 is connected with the first wall 31, and the other part of the second wall 33 is connected with the reinforcing member 32 and indirectly connected with the first wall 31 through the reinforcing member 32; the second wall 33 can be connected with the reinforcing member 32 by bonding, welding or other ways, and the second wall 33 can only abut against the reinforcing member 32.

[0164] The third wall 34 refers to the part of the limiting beam 30 connected with the second wall 33, and in the case that the second wall 33 is connected with the first wall 31, the third wall 34 can share part of the force borne by the first wall 31 through the second wall 33 to improve the strength of the first wall 31; the third wall 34 can be a square plate structure, or a circular plate structure or other shape structure; the third wall 34 is connected with the second wall 33, and the third wall 34 can be connected with the second wall 33 by welding, bonding or other ways; the material of the third wall 34 can include metal, plastic or other materials.

[0165] The third wall 34 is connected with the second wall 33 on the side away from the first wall 31, that is, the second wall 33 is located between the first wall 31 and the third wall 34; there can be a gap between the third wall 34 and the second wall 33 to form an energy absorption space, and the limiting beam 30 is similar to a box beam structure to further improve the strength of the limiting beam 30.

[0166] In the case that the limiting beam 30 includes the first wall 31, the second wall 33 and the third wall 34, at least part of the first wall 31 and the second wall 33, and the second wall 33 and the third wall 34 can be arranged with a gap to make the limiting beam 30 a box beam structure with an internal space to improve the strength of the limiting beam 30.

[0167] The embodiment provides specific structures of the limiting beam 30. The second wall 33 and the third wall 34 are arranged, so that the limiting beam 30 is a multi-layer structure including the first wall 31, the second wall 33 and the third wall 34, so that the limiting beam 30 can not only inhibit the deformation of the battery monomer 21, but also reduce the weight of the limiting beam 30.

[0168] Reference Figure 9 to Figure 11 In some embodiments, the second wall 33 includes a first body part 331, at least part of the first body part 331 is connected to the first wall 31; a mounting groove 3311 is arranged on one side of the first body part 331 towards the first wall 31, and the first protruding part 322 is clamped in the mounting groove 3311 and connected to the inner wall of the mounting groove 3311.

[0169] The first body part 331 refers to the main part of the second wall 33. In addition to the first body part 331, the second wall 33 can also include other structures. The first body part 331 can be a square, circular or other shape structure. The first body part 331 can be a plate structure, or a columnar structure or other shape structure. The material of the first body part 331 can include metal, plastic or other materials.

[0170] The first body part 331 is connected to the first wall 31 to share part of the force borne by the first wall 31 and improve the strength of the first wall 31. At least part of the first body part 331 is connected to the first wall 31. The first body part 331 can be only partially connected to the first wall 31, or the first body part 331 can be completely connected to the first wall 31. The first body part 331 can be connected to the first wall 31 by bonding, welding, screwing or other means.

[0171] The mounting groove 3311 refers to a groove structure arranged on the first body part 331. The mounting groove 3311 can be formed by grooving on the first body part 331. The mounting groove 3311 can be formed by local bending of the first body part 331. The cross-sectional shape of the mounting groove 3311 can be square, semicircular or other shapes. In the case that the reinforcing part 32 is clamped in the mounting groove 3311, the cross-sectional shape of the mounting groove 3311 can also be arranged according to the contour shape of the reinforcing part 32. The number of the mounting groove 3311 can be one, two or more.

[0172] The mounting groove 3311 is used to accommodate the reinforcing part 32. The number of the mounting groove 3311 can be consistent with the number of the reinforcing part 32, so that the mounting groove 3311 and the reinforcing part 32 can correspond one by one. The number of the mounting groove 3311 can also be different from the number of the reinforcing part 32. In this case, one mounting groove 3311 can correspond to one reinforcing part 32, or two or more reinforcing parts 32.

[0173] The length direction of the mounting groove 3311 can be parallel to the height direction Z of the battery device 100, or can be parallel to the width direction X of the battery device 100; according to the correspondence between the mounting groove 3311 and the reinforcing member 32, the length direction of the mounting groove 3311 can be the same as the length direction of the reinforcing member 32.

[0174] For example, the mounting groove 3311 is arranged in one-to-one correspondence with the reinforcing member 32, and the length direction of the mounting groove 3311 can be the same as the length direction of the reinforcing member 32.

[0175] The mounting groove 3311 is arranged on the side of the first main body part 331 facing the first wall 31, so that the reinforcing member 32 can be clamped in the mounting groove 3311; in the case that the reinforcing member 32 is clamped in the mounting groove 3311, the reinforcing member 32 can be connected to the inner wall of the mounting groove 3311, that is, the reinforcing member 32 is connected to the first main body part 331, and the reinforcing member 32 can be connected to the inner wall of the mounting groove 3311 by bonding, welding, screwing or other means, or the reinforcing member 32 can only abut against the inner wall of the mounting groove 3311.

[0176] In the case that the first main body part 331 is connected to the first wall 31, the mounting groove 3311 is arranged on the first main body part 331 to accommodate the reinforcing member 32 through the mounting groove 3311, so as to reduce the interference of the reinforcing member 32 on the connection of the first main body part 331 to the first wall 31, and to enable the first main body part 331 to be more stably connected to the first wall 31.

[0177] The first main body part 331 is connected to the first wall 31, so that the first main body part 331 can provide support for the first wall 31 and can bear part of the force on the first wall 31, thereby improving the strength of the first wall 31; the reinforcing member 32 is connected to the inner wall of the mounting groove 3311, so that the first main body part 331 can also provide support for the reinforcing member 32 and can bear part of the force on the reinforcing member 32, thereby further improving the strength of the first wall 31.

[0178] The embodiment provides some specific structures of the second wall 33, the mounting groove 3311 is arranged on the second wall 33 to accommodate the reinforcing member 32 through the mounting groove 3311, so as to reduce the interference of the reinforcing member 32 on the connection of the second wall 33 to the first wall 31; at the same time, the reinforcing member 32 is connected to the inner wall of the mounting groove 3311, so that the second wall 33 can also improve the strength of the reinforcing member 32 and can share the force borne by the reinforcing frame, thereby enabling the second wall 33 to also improve the strength of the first wall 31 through the reinforcing member 32.

[0179] Reference Figure 9 to Figure 11In some embodiments, the first main body part 331 is deformed in a direction away from the first wall 31 and forms a first reinforcing part 3312, and a mounting groove 3311 is formed on a side of the first reinforcing part 3312 facing the first wall 31.

[0180] The first reinforcing part 3312 refers to a reinforcing structure arranged on the first main body part 331 to improve the strength of the first main body part 331; the first reinforcing part 3312 is formed by deforming the first main body part 331 in a direction away from the first wall 31, at this time the first reinforcing part 3312 is a reinforcing rib structure located on a side of the first main body part 331 away from the first wall 31; the deformation of the first main body part 331 can also form a mounting groove 3311 on a side of the first reinforcing part 3312 facing the first wall 31 to correspond to the reinforcing member 32.

[0181] The number of first reinforcing parts 3312 can be one, two or more; the number of first reinforcing parts 3312 is arranged according to the number of reinforcing members 32, and the number of first reinforcing parts 3312 can be the same as the number of reinforcing members 32.

[0182] The length direction of the first reinforcing part 3312 can be parallel to the height direction Z of the battery device 100, or parallel to the width direction X of the battery device 100; according to the correspondence between the mounting groove 3311 and the reinforcing member 32, the length direction of the first reinforcing part 3312 can be the same as the length direction of the reinforcing member 32.

[0183] For example, the mounting groove 3311 and the reinforcing member 32 are arranged one by one, and the length direction of the first reinforcing part 3312 can be the same as the length direction of the reinforcing member 32.

[0184] In this embodiment, the first main body part 331 is deformed to form the first reinforcing part 3312 and the mounting groove 3311, so as to improve the strength of the second wall 33 and the reinforcing member 32 through the first reinforcing part 3312, and accommodate the reinforcing member 32 through the mounting groove 3311; at the same time, this arrangement can also keep the thickness of the second wall 33 consistent, improve the overall performance of the second wall 33, and reduce the risk of local stress concentration.

[0185] Reference Figure 9 , Figure 10 In some embodiments, the first reinforcing part 3312 has multiple first reinforcing parts 3312, each of which corresponds to a different reinforcing member 32.

[0186] There are multiple first reinforcing parts 3312, that is, multiple mounting grooves 3311; each first reinforcing part 3312 is arranged one by one with each reinforcing member 32, that is, each mounting groove 3311 is arranged one by one with each reinforcing member 32, at this time only one reinforcing part is accommodated in one mounting groove 3311, and the shape of the mounting groove 3311 can be arranged according to the contour shape of the reinforcing member 32.

[0187] The first reinforcing portions 3312 are provided in plurality, so that each first reinforcing portion 3312 can better improve the strength of the second wall 33; the first reinforcing portions 3312 are provided in plurality and correspond to different reinforcing members 32 respectively, and the mounting grooves 3311 are also provided in plurality, so that the mounting grooves 3311 correspond to different reinforcing members 32 respectively, thereby making the second wall 33 better support each reinforcing member 32.

[0188] In the technical scheme of the embodiment, each first reinforcing portion 3312 corresponds to each reinforcing member 32, so that the second wall 33 can better improve the strength of each reinforcing member 32 through each first reinforcing portion 3312.

[0189] Reference Figure 9 、 Figure 10 In some embodiments, the first main body portion 331 is provided with a second reinforcing portion 3313 on the side away from the first wall 31, and the second reinforcing portion 3313 is connected to the third wall 34.

[0190] The second reinforcing portion 3313 refers to a reinforcing structure provided on the first main body portion 331 to improve the strength of the first main body portion 331; the second reinforcing portion 3313 can be a structural member connected to the first main body portion 331, or the second reinforcing portion 3313 can be a structure formed by deforming the first main body portion 331; when the second reinforcing portion 3313 is a structural member connected to the first main body portion 331, the second reinforcing portion 3313 can be connected to the first main body portion 331 by adhesion, welding or other means, or the second reinforcing portion 3313 can be integrally formed with the first main body portion 331; the shape of the second reinforcing portion 3313 can be square, circular or other shapes; the number of the second reinforcing portion 3313 can be one, two or more; the material of the second reinforcing portion 3313 can include metal, plastic or other materials.

[0191] When the first main body portion 331 is provided with the first reinforcing portion 3312, the length direction of the second reinforcing portion 3313 can be different from or the same as the length direction of the first reinforcing portion 3312; when the first main body portion 331 is provided with the first reinforcing portion 3312, the second reinforcing portion 3313 can intersect the first reinforcing portion 3312, or the second reinforcing portion 3313 can be provided away from the first reinforcing portion 3312.

[0192] The provision of the second reinforcing portion 3313 can improve the strength of the first main body portion 331 and the strength of the second wall 33, thereby making the second wall 33 better support the first wall 31 and the reinforcing members 32.

[0193] The second reinforcing part 3313 is arranged on the side of the second wall 33 away from the first wall 31, so as to reduce the interference of the second reinforcing part 3313 with the first wall 31, and facilitate the connection of the second reinforcing part 3313 with the third wall 34.

[0194] The second reinforcing part 3313 is connected with the third wall 34, and the second reinforcing part 3313 can be connected with the third wall 34 by means of bonding, welding, screwing or other means. The connection of the second reinforcing part 3313 with the third wall 34 enables the third wall 34 to share part of the force borne by the second wall 33, so as to improve the strength of the second wall 33, and indirectly improve the strength of the first wall 31.

[0195] In the embodiment, the second reinforcing part 3313 is arranged on the second wall 33, so as to improve the strength of the second wall 33 by means of the second reinforcing part 3313, thereby enabling the second wall 33 to better support the first wall 31, and enabling the second wall 33 to better share the force borne by the first wall 31 and the reinforcing member 32, and thereby improving the strength of the first wall 31. Meanwhile, the second reinforcing part 3313 is connected with the third wall 34, so as to enable the third wall 34 to also share part of the force borne by the second wall 33, thereby enabling the third wall 34 to also share the force borne by the first wall 31 and the reinforcing member 32, and thereby better improving the strength of the first wall 31.

[0196] Reference Figure 9 , Figure 10 In some embodiments, the second reinforcing part 3313 is formed by deforming a part of the first main body part 331 in a direction away from the first wall 31.

[0197] The second reinforcing part 3313 is formed by deforming the first main body part 331 in a direction away from the first wall 31, and at this time, the second reinforcing part 3313 is a reinforcing rib structure located on the side of the first main body part 331 away from the first wall 31. According to the deformed shape of the first main body part 331, the cross-sectional shape of the second reinforcing part 3313 can be square, semicircular, triangular or other shapes. For example, the cross-sectional shape of the second reinforcing part 3313 is square.

[0198] The first main body part 331 is deformed in a direction away from the first wall 31 to form the second reinforcing part 3313, and at this time, the first main body part 331 can form a small box beam structure at the second reinforcing part 3313, thereby improving the strength of the first main body part 331 at the second reinforcing part 3313.

[0199] The second reinforcing portion 3313 is deformed to the first main body portion 331, so that the second reinforcing portion 3313 can improve the strength of the second wall 33, and the weight of the second wall 33 is not increased too much, the negative influence of the second reinforcing portion 3313 on the weight of the second wall 33 is reduced, so that the negative influence of the second reinforcing portion 3313 on the weight of the limiting beam 30 can be reduced.

[0200] The second reinforcing portion 3313 is deformed to the first main body portion 331, and the thickness of different parts of the first main body portion 331 can be kept consistent or substantially consistent, so as to reduce the risk of local stress concentration on the first main body portion 331, thereby further improving the strength of the second wall 33.

[0201] In the embodiment, the first main body portion 331 is deformed to the second reinforcing portion 3313, so that the second reinforcing portion 3313 can improve the strength of the second wall 33; at the same time, the thickness of the second wall 33 can be kept consistent, the overall performance of the second wall 33 is improved, and the risk of local stress concentration is reduced.

[0202] Reference Figure 9 、 Figure 10 In some embodiments, the second reinforcing portion 3313 is located at the middle of the first main body portion 331 along the third direction, and the third direction is perpendicular to the first direction.

[0203] The second reinforcing portion 3313 is located at the middle of the first main body portion 331 along the third direction, so that the second reinforcing portion 3313 can correspond to the middle of the first side surface 2111 adjacent to the limiting beam 30; the third direction can be the height direction Z of the battery device 100, or other directions.

[0204] Since the deformation amount of the first side surface 2111 gradually increases from the edge to the middle position, that is, the deformation amount of the first side surface 2111 far away from the middle position of the edge is large, in the case that the second wall 33 is connected to the first wall 31, the arrangement can better strengthen the strength of the first wall 31 at the middle of the third direction, so that the first wall 31 can better suppress the deformation of the first side surface 2111 at the middle of the third direction, thereby better improving the ability of the limiting beam 30 to suppress the deformation of the first side surface 2111.

[0205] In the embodiment, the second reinforcing portion 3313 is located at the middle of the first main body portion 331 along the third direction, so that the second reinforcing portion 3313 can correspond to the middle of the battery monomer 21 along the third direction, so that the second wall 33 can better strengthen the strength of the first wall 31 at the middle of the third direction.

[0206] In some embodiments, the first main body portion 331, the reinforcing member 32 and the first wall 31 are connected by welding.

[0207] The first main body part 331, the reinforcing member 32 and the first wall 31 are connected by welding, and the first main body part 331, the reinforcing member 32 and the first wall 31 can also be connected by fusion welding, pressure welding, brazing or other welding methods; the first main body part 331, the reinforcing member 32 and the first wall 31 are connected by welding, so that the three are stably connected through the welding marks formed by welding, thereby improving the connection strength between the three, and facilitating the first main body part 331 and the reinforcing member 32 to share the force borne by the first wall 31.

[0208] In the technical scheme of the embodiment, the first main body part 331, the reinforcing member 32 and the first wall 31 are welded to improve the connection stability of the first main body part 331, the reinforcing member 32 and the first wall 31, and reduce the risk of connection failure caused by stress of the first wall 31.

[0209] Reference Figure 9 , Figure 10 In some embodiments, the second wall 33 includes a second connecting part 332 connected to the first main body part 331, and the second connecting part 332 extends from the first main body part 331 to a direction away from the first wall 31 and is connected to the third wall 34.

[0210] The second connecting part 332 refers to a part of the second wall 33 connected to the third wall 34, and the third connecting part 342 can be a square, a circle or other shaped structure; the second connecting part 332 is connected to the first main body part 331, and the second connecting part 332 can be connected to the first main body part 331 by adhesion, welding or other methods, or the second connecting part 332 can be integrally formed with the first main body part 331; the third connecting part 342 is connected to the third wall 34, and the third connecting part 342 can be connected to the third wall 34 by adhesion, welding, screwing or other methods; the material of the third connecting part 342 can include metal, plastic or other materials.

[0211] The second connecting part 332 can be located at the upper part or the lower part of the first main body part 331 in the height direction Z of the battery device 100, so as to be connected to the upper part or the lower part of the third wall 34.

[0212] Since the third wall 34 is located on the side of the second wall 33 away from the first wall 31, the second connecting part 332 extends from the first main body part 331 to the direction away from the first wall 31, so as to facilitate the connection of the second connecting part 332 and the third wall 34; the second connecting part 332 extends from the first main body part 331 to the direction of the third wall 34, and at this time, the second connecting part 332 can be arranged at an obtuse angle with the first main body part 331, so as to make the second connecting part 332 inclined relative to the first main body part 331, or the second connecting part 332 can be perpendicular to the first main body part 331.

[0213] For example, the second connecting portion 332 is arranged at an obtuse angle with the first body portion 331 and is inclined relative to the first body portion 331. In this case, the second connecting portion 332 can be connected to the third wall 34 and also functions as a diagonal brace for the first wall 31, so that the second wall 33 can better support the first wall 31 and the second wall 33 can better improve the strength of the first wall 31.

[0214] In the case where the second connecting portion 332 is connected to the third wall 34, the second connecting portion 332 can be connected only to the third wall 34, or the second connecting portion 332 can be connected to the box body 10 at the same time, so as to better improve the connection stability of the second wall 33.

[0215] In this embodiment, the second wall 33 comprises the second connecting portion 332, and the second connecting portion 332 is deformed in a direction away from the first wall 31 and is connected to the third wall 34, so that the first wall 31 and the third wall 34 can be indirectly connected through the second wall 33, and the third wall 34 can also share the force borne by the first wall 31, thereby improving the strength of the first wall 31 and the integrity of the limiting beam 30. Meanwhile, the deformation of the second connecting portion 332 in the direction away from the first wall 31 can form a space between the second wall 33 and the third wall 34, so as to better improve the strength of the limiting beam 30.

[0216] Reference Figure 9 、 Figure 10 In some embodiments, the third wall 34 comprises a second body portion 341 and a third connecting portion 342 connected to the second body portion 341, the third connecting portion 342 is connected to the second connecting portion 332, and the third connecting portion 342 is also connected to the box body 10.

[0217] The second body portion 341 refers to the main part of the third wall 34. The third wall 34 can comprise other structures in addition to the second body portion 341. The second body portion 341 can be a square, circular or other shape structure. The second body portion 341 can be a plate structure, or a column structure or other shape structure. The material of the second body portion 341 can comprise metal, plastic or other materials.

[0218] The third connecting part 342 refers to the part of the third wall 34 that is connected to the second connecting part 332. The third connecting part 342 can be square, circular, or other shaped structures. The third connecting part 342 is connected to the second main body part 341. The third connecting part 342 can be connected to the second main body part 341 by bonding, welding, or other means. The third connecting part 342 can also be integrally formed with the second main body part 341. The third connecting part 342 is connected to the second connecting part 332. The third connecting part 342 can be connected to the second connecting part 332 by bonding, welding, screwing, or other means. The material of the third connecting part 342 can include metal, plastic, or other materials.

[0219] The third connecting part 342 may be located at the upper or lower part of the second main body part 341 along the height direction Z of the battery device 100, so as to adapt to the position of the second connecting part 332.

[0220] The third connecting part 342 is also connected to the housing 10. The third connecting part 342 can be connected to the housing 10 by bonding, welding, screwing or other means. The third connecting part 342 can be directly connected to the housing 10 or indirectly connected to the housing 10 through an intermediate structure.

[0221] The third connecting part 342 is connected to the box body 10, thereby enabling the third wall 34 to be connected to the box body 10 and enabling the limiting beam 30 to be connected to the box body 10; when the second connecting part 332 is connected to the third connecting part 342, the third connecting part 342 connected to the box body 10 can also better support the second wall 33 through the second connecting part 332.

[0222] When the third connecting part 342 is connected to the housing 10, the third connecting part 342 can deform from the second main body part 341 in a direction away from the second wall 33 so that the third connecting part 342 can be connected to the housing 10; the third connecting part 342 can be set at an obtuse angle to the second main body part 341 so that the third connecting part 342 is inclined relative to the second main body part 341, or the third connecting part 342 can be perpendicular to the second main body part 341.

[0223] This embodiment provides some specific structures for the third wall 34, such that the third wall 34 includes a second main body 341 and a third connecting part 342, and the third connecting part 342 is connected to the second connecting part 332, so that the second wall 33 can be connected to the third wall 34.

[0224] refer to Figure 8 , Figure 9 In some embodiments, the third wall 34 further includes a fourth connecting portion 343 connected to the second main body portion 341. The fourth connecting portion 343 and the third connecting portion 342 are located on opposite sides of the second main body portion 341, and the fourth connecting portion 343 is connected to the first wall 31.

[0225] The fourth connecting portion 343 refers to a portion where the second body portion 341 is connected to the first wall 31. The fourth connecting portion 343 can be square, circular, or other shapes. The fourth connecting portion 343 is connected to the second body portion 341. The fourth connecting portion 343 can be connected to the second body portion 341 by adhesion, welding, or other means. The fourth connecting portion 343 can also be integrally formed with the second body portion 341. The fourth connecting portion 343 is connected to the first wall 31. The fourth connecting portion 343 can be connected to the first wall 31 by adhesion, welding, screwing, or other means. The fourth connecting portion 343 can be made of metal, plastic, or other materials.

[0226] The fourth connecting portion 343 is connected to the first wall 31, so that the third wall 34 can share the force borne by the first wall 31. In the case where the fourth connecting portion 343 is connected to the first wall 31, the second body portion 341 can be spaced apart from the first wall 31, and a space can be formed between the second body portion 341 and the first wall 31, so that the limiting beam 30 is a box-shaped beam structure, and the reinforcing member 32 and the second wall 33 can be located in the space.

[0227] In the case where the fourth connecting portion 343 is connected to the first wall 31 and the third connecting portion 342 is connected to the second connecting portion 332, the fourth connecting portion 343 and the third connecting portion 342 can be located on opposite sides of the second body portion 341, so as to reduce the mutual influence between the fourth connecting portion 343 and the third connecting portion 342. For example, in the height direction Z of the battery device 100, the third connecting portion 342 is located below the second body portion 341 and is connected to the bottom plate 13 of the box body 10, and the fourth connecting portion 343 is located above the second body portion 341.

[0228] In the present embodiment, the third wall 34 further includes the fourth connecting portion 343, and the fourth connecting portion 343 is connected to the first wall 31, so that the third wall 34 can be directly connected to the first wall 31, thereby enabling the third wall 34 to better share the force borne by the first wall 31, improving the strength of the first wall 31, and improving the integrity of the limiting beam 30.

[0229] Reference Figure 8 , Figure 9 In some embodiments, the fourth connecting portion 343 is bent from the second body portion 341 to the direction where the first wall 31 is located. The first wall 31 includes a third body portion 311 and a fifth connecting portion 312 connected to the third body portion 311. The fifth connecting portion 312 is bent from the third body portion 311 to the direction where the third wall 34 is located, so that the fifth connecting portion 312 and the fourth connecting portion 343 at least partially overlap.

[0230] The fourth connecting portion 343 is bent from the second main body portion 341 to the direction where the first wall 31 is located, so as to connect the fourth connecting portion 343 with the first wall 31. After being bent, the fourth connecting portion 343 is arranged at an angle with the second main body portion 341. The angle between the fourth connecting portion 343 and the second main body portion 341 can be an obtuse angle or a right angle.

[0231] For example, the angle between the fourth connecting portion 343 and the second main body portion 341 after being bent is a right angle.

[0232] The third main body portion 311 refers to the main body part of the first wall 31. In addition to the third main body portion 311, the first wall 31 can also include other structures. The third main body portion 311 can be a square, circular or other shape structure. The third main body portion 311 can be a plate structure, a column structure or other shape structure. The material of the third main body portion 311 can include metal, plastic or other materials.

[0233] The fifth connecting portion 312 refers to the part of the first wall 31 connected with the fourth connecting portion 343. The fifth connecting portion 312 can be a square, circular or other shape structure. The fifth connecting portion 312 is connected to the third main body portion 311. The fifth connecting portion 312 can be connected to the third main body portion 311 by adhesion, welding or other means. The fifth connecting portion 312 can also be integrally formed with the third main body portion 311. The fifth connecting portion 312 is connected to the fourth connecting portion 343. The fifth connecting portion 312 can be connected to the fourth connecting portion 343 by adhesion, welding, screwing or other means. The material of the fifth connecting portion 312 can include metal, plastic or other materials.

[0234] The fifth connecting portion 312 can be located at the upper or lower part of the third main body portion 311 along the height direction Z of the battery device 100, so as to be adapted to the position of the second connecting portion 332.

[0235] The fifth connecting portion 312 is bent from the third main body portion 311 to the direction where the first wall 31 is located, so as to connect the fifth connecting portion 312 with the fourth connecting portion 343. After being bent, the fifth connecting portion 312 is arranged at an angle with the third main body portion 311. The angle between the fifth connecting portion 312 and the third main body portion 311 can be an obtuse angle or a right angle.

[0236] For example, the angle between the fifth connecting portion 312 and the third main body portion 311 after being bent is a right angle.

[0237] The fifth connecting portion 312 at least partially overlaps with the fourth connecting portion 343. The fifth connecting portion 312 can completely overlap with the fourth connecting portion 343, or only partially overlap with the fourth connecting portion 343, so as to improve the connection strength between the fifth connecting portion 312 and the fourth connecting portion 343.

[0238] In the embodiment, the first wall 31 comprises the fifth connecting part 312, and the fifth connecting part 312 is connected with the fourth connecting part 343, so that the third wall 34 can be better connected with the first wall 31, the fourth connecting part 343 is bent relative to the second main body part 341, and the fifth connecting part 312 is bent relative to the third main body part 311, so as to form a space between the first wall 31 and the third wall 34, thereby providing a space for the second arm and the reinforcing part 32, and improving the strength of the limiting beam 30; the fifth connecting part 312 and the fourth connecting part 343 at least partially overlap, so as to improve the connecting strength between the fourth connecting part 343 and the fifth connecting part 312.

[0239] Reference Figure 7 、 Figure 8 In some embodiments, the limiting beam 30 is at least two, and the at least two limiting beams 30 are arranged at intervals along the first direction, and the battery monomer assembly 20 is arranged between the adjacent two limiting beams 30; the battery device 100 further comprises a limiting part, and two ends of the limiting part are respectively connected to two different limiting beams 30, and the limiting part is connected to the fourth connecting part 343 and / or the fifth connecting part 312 of the corresponding limiting beam 30.

[0240] The limiting beam 30 is at least two, that is, the number of the limiting beam 30 can be two, or three or more; the at least two limiting beams 30 are arranged at intervals along the first direction, so that the battery monomer assembly 20 is installed between the two limiting beams 30, and the limiting beam 30 can restrain the expansion deformation of the battery monomer 21 from the two sides of the battery monomer assembly 20 along the first direction.

[0241] The limiting part refers to a structure in the battery device 100 for improving the restraining performance of the limiting beam 30; the limiting part can be a strip-shaped or belt-shaped structure, or other shaped structures; the limiting part is connected to the limiting beam 30, and the limiting part can be connected to the limiting beam 30 by welding, bonding, screwing or other ways; the number of the limiting part can be one, or two or more.

[0242] The two ends of the limiting part are respectively connected to two limiting beams 30, in the case that the number of the limiting beam 30 is two, the two ends of the limiting part are respectively connected to the two limiting beams 30; in the case that the number of the limiting beam 30 is three or more, the two ends of the limiting part can be respectively connected to the two adjacent limiting beams 30, or the limiting part can be connected to the two limiting beams 30 at the most end in the first direction by passing through one or more limiting beams 30.

[0243] Since the limiting beams 30 are located on both sides of the battery monomer 21 along the first direction, the expansion force borne by the limiting beams 30 is directed from the battery monomer assembly 20 to the limiting beams 30; since the limiting member is connected to the two limiting beams 30, the limiting member provides a pulling force to the limiting beams 30, which is directed from the limiting beams 30 to the battery monomer assembly 20 between the two limiting beams 30, that is, the pulling force provided by the limiting member is opposite to the direction of the expansion force borne by the limiting beams 30, thereby improving the ability of the limiting beams 30 to suppress the expansion deformation of the battery monomer 21 and improving the restraining performance of the limiting beams 30 on the battery monomer 21.

[0244] The fourth connecting part 343 and / or the fifth connecting part 312 of the limiting member are connected to the corresponding limiting beam 30, that is, one end of the limiting member connected to the limiting beam 30 can be connected only to the fourth connecting part 343 or the fifth connecting part 312, or can be connected to both the fourth connecting part 343 and the fifth connecting part 312; for example, when the fifth connecting part 312 of the first wall 31 is connected to the fourth connecting part 343 of the third wall 34 and at least partially overlaps, one end of the limiting member is connected to the corresponding limiting beam 30 through the bolt structure penetrating the fourth connecting part 343 and the fifth connecting part 312; since the fifth connecting part 312 and the fourth connecting part 343 at least partially overlap, the overlapping fourth connecting part 343 and fifth connecting part 312 have higher strength and can provide better support and restraint for the limiting member.

[0245] In this embodiment, the limiting member is provided so that both ends of the limiting member are connected to the two limiting beams 30 to assist in improving the strength of the limiting beams 30 through the limiting member, and to provide a pulling force directed to the battery monomer 21 for the limiting beams 30 when the limiting beams 30 restrict the deformation of the battery monomer 21; at the same time, the limiting member is connected to the fourth connecting part 343 and / or the fifth connecting part 312, so that the limiting member can be more stably connected to the limiting beam 30.

[0246] Reference Figure 7 , Figure 8 In some embodiments, the first wall 31 includes a third main body part 311 and a sixth connecting part 313 connected to the third main body part 311, and the sixth connecting part 313 is also connected to the box body 10; the sixth connecting part 313 is bent from the third main body part 311 in a direction toward the battery monomer assembly 20, and the battery monomer assembly 20 is pressed and held by at least part of the sixth connecting part 313.

[0247] The third main body part 311 refers to the main part of the first wall 31, and the first wall 31 can also include other structures in addition to the third main body part 311; the third main body part 311 can be a square, circular or other shape structure, and can be a plate-shaped structure, a columnar structure or other shape structure; the material of the third main body part 311 can include metal, plastic or other materials.

[0248] The sixth connecting part 313 refers to the part where the first wall 31 is connected to the box body 10. The sixth connecting part 313 can be square, circular or other shapes. The sixth connecting part 313 is connected to the third main part 311. The sixth connecting part 313 can be connected to the third main part 311 by adhesion, welding or other means. The sixth connecting part 313 can also be integrally formed with the third main part 311. The sixth connecting part 313 is also connected to the box body 10. The sixth connecting part 313 can be connected to the box body 10 by adhesion, welding, screwing or other means. The material of the sixth connecting part 313 can include metal, plastic or other materials.

[0249] The sixth connecting part 313 is bent from the third main part 311 to the direction where the battery monomer assembly 20 is located, and the battery monomer assembly 20 holds at least part of the sixth connecting part 313, so as to hold the sixth connecting part 313 on the box body 10 by the pressure of the battery monomer assembly 20, thereby improving the connection stability between the sixth connecting part 313 and the box body 10, and reducing the risk of the sixth connecting part 313 being separated from the box body 10. The battery monomer assembly 20 can hold only part of the sixth connecting part 313, or can hold the entire sixth connecting part 313.

[0250] The sixth connecting part 313 is arranged at an included angle with the third main part 311 after being bent. The included angle between the sixth connecting part 313 and the third main part 311 can be obtuse or right.

[0251] The sixth connecting part 313 can be located at the lower part of the third main part 311 along the height direction Z of the battery device 100, so as to be held by the battery monomer assembly 20 and connected to the box body 10. The sixth connecting part 313 can also be located at the upper part of the third main part 311 along the height direction Z of the battery device 100.

[0252] For example, the sixth connecting part 313 is located at the lower part of the third main part 311 along the height direction Z of the battery device 100, and the sixth connecting part 313 is connected to the bottom plate 13 of the box body 10.

[0253] In this embodiment, the first wall 31 includes the sixth connecting part 313. The sixth connecting part 313 is bent to the direction where the battery monomer 21 is located, and the battery monomer 21 holds the sixth connecting part 313, so as to hold and fix the sixth connecting part 313 by the gravity of the battery monomer 21, thereby limiting the deformation of the first wall 31 by the pressure of the sixth connecting part 313, and improving the strength of the first wall 31 and the ability to suppress the deformation of the battery monomer 21.

[0254] Reference Figure 7 , Figure 8 In some embodiments, the sixth connecting part 313 is clamped to the box body 10.

[0255] The sixth connecting part 313 is clamped on the box body 10. The sixth connecting part 313 can be clamped on the box body 10 by setting a clamping groove on the box body 10 and clamping the sixth connecting part 313 in the clamping groove, or by setting a buckle on the box body 10 and setting a clamping groove on the sixth connecting part 313 matched with the buckle, or by other ways.

[0256] In the technical scheme of the embodiment, the sixth connecting part 313 is clamped on the box body 10, so as to facilitate the installation of the limiting beam 30.

[0257] Reference Figure 7 Figure 8 In some embodiments, a fixing hole 3131 is formed on the sixth connecting part 313, and a fixing column 14 is arranged on the box body 10 and inserted into the fixing hole 3131.

[0258] The fixing hole 3131 refers to a hole structure arranged on the sixth connecting part 313. The fixing hole 3131 can be a through hole penetrating the sixth connecting part 313, or a blind hole. The fixing hole 3131 can be a straight hole, a tapered hole, a stepped hole or other shaped hole structure. The fixing hole 3131 can be a square hole, a circular hole or other shaped hole structure. The number of fixing holes 3131 can be one, two or more.

[0259] The fixing column 14 refers to a columnar structure arranged on the box body 10. The fixing column 14 can be inserted into the fixing hole 3131, and the sixth connecting part 313 is fixed on the box body 10 by the fixing column 14. The fixing column 14 can be a prism structure, a cylindrical structure or other shaped columnar structure. The shape of the fixing column 14 can be adapted to the shape of the fixing hole 3131. The number of fixing columns 14 can be one, two or more. The fixing column 14 is connected to the box body 10. The fixing column 14 can be connected to the box body 10 by bonding, welding, screwing or other ways. The fixing column 14 can be integrally formed with the box body 10. The material of the fixing column 14 can include metal, plastic or other materials. The material of the fixing column 14 can be the same as or different from the material of the box body 10.

[0260] The insertion of the fixing column 14 into the fixing hole 3131 can limit the displacement of the sixth connecting part 313 relative to the box body 10, so as to fix the sixth connecting part 313. The fixing column 14 can especially limit the displacement of the sixth connecting part 313 in the radial direction of the fixing column 14. In the case of the expansion and deformation of the battery monomer 21, the first wall 31 is subjected to a force from the battery monomer 21 to the first wall 31, which is parallel or approximately parallel to the radial direction of the fixing column 14. At this time, the fixing column 14 can inhibit the displacement trend of the first wall 31 away from the battery monomer 21 through the sixth connecting part 313, and can improve the ability of the limiting beam 30 to inhibit the deformation of the battery monomer 21.

[0261] ​In the example, when the sixth connecting part 313 is connected to the bottom plate 13 of the box body 10, the fixing column 14 is arranged on the bottom plate 13 of the box body 10.

[0262] The embodiment provides specific structures of the sixth connecting part 313 clamped to the box body 10, a fixing hole 3131 is arranged on the sixth connecting part 313, and a corresponding fixing column 14 is arranged on the box body 10, so that the clamping of the sixth connecting part 313 is realized; meanwhile, the fixing column 14 arranged in this way can also share part of force borne by the first wall 31 through the sixth connecting part 313, so that the strength of the first wall 31 is improved, and the ability of the limiting beam 30 to restrain the deformation of the battery monomer 21 is improved.

[0263] Reference Figure 7 , Figure 8 In some embodiments, the fixing hole 3131 is a triangular hole, the fixing column 14 is a triangular prism, and the shape of the fixing column 14 is matched with the shape of the fixing hole 3131.

[0264] The fixing hole 3131 is a triangular hole, the fixing column 14 is a triangular prism, and the shape of the fixing column 14 is matched with the shape of the fixing hole 3131, so that the fixing column 14 can be inserted into the fixing hole 3131, and the fixing column 14 can abut against the inner wall of the fixing hole 3131, so that the fixing column 14 can better limit the displacement of the sixth connecting part 313 in the radial direction of the fixing column 14.

[0265] The embodiment makes the fixing hole 3131 and the fixing column 14 triangular structures respectively, compared with the circular fixing hole 3131 and the cylindrical fixing column 14 structure, the triangular fixing hole 3131 and the triangular prism fixing column 14 can not only fix the sixth connecting part 313, but also can inhibit the torsion tendency between the sixth connecting part 313 and the fixing column 14, so as to further improve the connection stability of the sixth connecting part 313.

[0266] The embodiment provides specific shapes of the fixing hole 3131 and the fixing column 14, so that the fixing column 14 and the fixing hole 3131 are triangular structures, so that the fixing column 14 can not only improve the strength of the first wall 31 through the sixth connecting part 313, but also can inhibit the torsion displacement between the fixing column 14 and the fixing hole 3131.

[0267] Reference Figure 7 , Figure 8 In some embodiments, the box body 10 is provided with a containing groove 15, and at least part of the sixth connecting part 313 is contained in the containing groove 15.

[0268] The accommodation groove 15 refers to a groove structure provided on the box body 10, and is used to accommodate the sixth connecting part 313. The accommodation groove 15 can be a square groove, a circular groove, or a groove structure of other shapes. The number of the accommodation groove 15 can be one, two, or more. The number of the accommodation groove 15 can be the same as that of the sixth connecting part 313, so that the accommodation groove 15 corresponds to the sixth connecting part 313 one by one. Alternatively, the number of the accommodation groove 15 can be different from that of the sixth connecting part 313, so that one accommodation groove 15 can accommodate two or more sixth connecting parts 313.

[0269] At least part of the sixth connecting part 313 is accommodated in the accommodation groove 15. The sixth connecting part 313 can be completely accommodated in the accommodation groove 15, or can be only partially accommodated in the accommodation groove 15.

[0270] Accommodating the sixth connecting part 313 in the accommodation groove 15 can reduce the height of the sixth connecting part 313 above the box body 10, so as to reduce the negative impact of the arrangement of the sixth connecting part 313 on the arrangement of the battery monomer 21.

[0271] For example, the accommodation groove 15 is provided on the bottom plate 13 of the box body 10, the sixth connecting part 313 is completely accommodated in the accommodation groove 15, the upper surface of the sixth connecting part 313 is flush with the upper surface of the bottom plate 13, and the battery monomer 21 is connected to the upper surface of the bottom plate 13 and abuts against the upper surface of the sixth connecting part 313.

[0272] In this embodiment, at least part of the sixth connecting part 313 is accommodated in the accommodation groove 15, so as to reduce the height of the sixth connecting part 313 above the box body 10, thereby reducing the negative impact of the arrangement of the sixth connecting part 313 on the arrangement of the battery monomer 21.

[0273] In some embodiments, the battery device 100 includes a box body 10, a battery monomer assembly 20, and a limiting beam 30.

[0274] The battery monomer assembly 20 and the limiting beam 30 are both arranged in the box body 10 and connected to the bottom plate 13 of the box body 10.

[0275] The battery monomer assembly 20 includes a plurality of battery monomers 21, and each battery monomer 21 is arranged in an array along the length direction X and the width direction Y of the battery device 100. The battery monomer 21 has a first side surface 2111 and a second side surface 2112, the area of the first side surface 2111 is greater than that of the second side surface 2112, and the first side surface 2111 of each battery monomer 21 is perpendicular to the length direction X of the battery device 100.

[0276] The limiting beam 30 has two and is arranged along the length direction X of the battery device 100, the battery monomer assembly 20 is arranged between the two limiting beams 30, and the two limiting beams 30 abut the battery monomer assembly 20 respectively; the length direction of the limiting beam 30 is parallel to the width direction Y of the battery device 100.

[0277] The limiting beam 30 includes a first wall 31 abutting the adjacent battery monomer 21, a second wall 33 arranged on the side of the first wall 31 away from the battery monomer 21, and a third wall 34 arranged on the side of the second wall 33 away from the first wall 31; the first wall 31 abuts the first side surface 2111 of the adjacent battery monomer 21.

[0278] The side of the first wall 31 away from the battery monomer 21 is provided with a reinforcing member 32, the length direction of the reinforcing member 32 is parallel to the height direction Z of the battery device 100; the number of reinforcing members 32 is multiple, and the multiple reinforcing members 32 are arranged along the width direction Y of the battery device 100; each reinforcing member 32 corresponds to the first side surface 2111 of the battery monomer 21 abutting the corresponding first wall 31, and the reinforcing member 32 corresponds to the middle of the corresponding first side surface 2111 along the width direction Y of the battery device 100.

[0279] In a second aspect, the embodiments of the present application also provide a power utilization device, which comprises the battery device 100 provided by some embodiments of the first aspect.

[0280] The power utilization device can be a vehicle 1000, or a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, or other power utilization devices using the battery device 100 as a power source or an energy storage element.

[0281] In the power utilization device, the limiting beam 30 of the battery device 100 can better inhibit the swelling deformation of the battery monomer 21, and the limiting beam 30 has a lighter weight.

[0282] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The container has storage space; A battery cell assembly is housed in the housing space. The battery cell assembly includes at least two battery cells arranged along a first direction. Each battery cell includes two first sides and two second sides. The first sides and the second sides alternate sequentially and are connected end to end. The area of ​​the first side is larger than the area of ​​the second side. The first direction is perpendicular to the first side. A limiting beam is connected to the housing, the limiting beam is disposed on one side of the battery cell assembly along the first direction, and the limiting beam abuts against the first side of the adjacent battery cell. The limiting beam includes a first wall that abuts against the battery cell. A reinforcing member is provided on the side of the first wall away from the battery cell. The reinforcing member corresponds to the middle part of the corresponding first side along the height direction and / or width direction of the battery device.

2. The battery device according to claim 1, characterized in that, The battery cell assembly includes battery cells arranged in an array along the first direction and the second direction, the length direction of the limiting beam is parallel to the second direction, and the second direction is perpendicular to the first direction; There are at least two reinforcing members, and each of the at least two reinforcing members corresponds to an adjacent battery cell.

3. The battery device according to claim 2, characterized in that, At least two of the reinforcing members are arranged at intervals along the second direction, and each of the reinforcing members corresponds to a different battery cell that abuts against the limiting beam.

4. The battery device according to claim 2 or 3, characterized in that, The length direction of the reinforcing member is parallel to the third direction, and the third direction, the first direction, and the second direction are perpendicular to each other.

5. The battery device according to any one of claims 1-3, characterized in that, The reinforcing member includes two first connecting portions connected to the first wall, and a first protrusion is connected between the two first connecting portions. The first protrusion protrudes in a direction away from the first wall to form a gap between the first protrusion and the first wall.

6. The battery device according to claim 5, characterized in that, The first protrusion corresponds to the middle of the corresponding first side along the height and / or width direction of the battery device.

7. The battery device according to claim 5, characterized in that, The limiting beam also includes a second wall and a third wall, a portion of the second wall being connected to the side of the first wall away from the battery cell, and another portion of the second wall being connected to the reinforcing member; The third wall is connected to the side of the second wall opposite to the first wall.

8. The battery device according to claim 7, characterized in that, The second wall includes a first main body portion, at least partially connected to the first wall; The first main body has a mounting groove on the side facing the first wall, and the first protrusion is engaged with the mounting groove and connected to the inner wall of the mounting groove.

9. The battery device according to claim 8, characterized in that, The first main body deforms in a direction away from the first wall to form a first reinforcing part, and the mounting groove is formed on the side of the first reinforcing part facing the first wall.

10. The battery device according to claim 9, characterized in that, There are multiple first reinforcing parts, and each first reinforcing part corresponds to a different reinforcing member.

11. The battery device according to claim 8, characterized in that, A second reinforcing part is provided on the side of the first main body that is away from the first wall, and the second reinforcing part is connected to the third wall.

12. The battery device according to claim 11, characterized in that, The second reinforcing part is formed by deformation of a portion of the first main body in a direction away from the first wall.

13. The battery device according to claim 11, characterized in that, The second reinforcing part is located in the middle of the first main body part along a third direction, which is perpendicular to the first direction.

14. The battery device according to claim 8, characterized in that, The first main body, the reinforcing member, and the first wall are connected by welding.

15. The battery device according to claim 8, characterized in that, The second wall includes a second connecting portion connected to the first main body portion, the second connecting portion extending from the first main body portion in a direction away from the first wall and connecting to the third wall.

16. The battery device according to claim 15, characterized in that, The third wall includes a second main body and a third connecting part connected to the second main body. The third connecting part is connected to the second connecting part and is also connected to the housing.

17. The battery device according to claim 16, characterized in that, The third wall further includes a fourth connecting portion connected to the second main body portion. The fourth connecting portion and the third connecting portion are located on opposite sides of the second main body portion, and the fourth connecting portion is connected to the first wall.

18. The battery device according to claim 17, characterized in that, The fourth connecting portion bends from the second main body portion toward the direction where the first wall is located; The first wall includes a third main body and a fifth connecting part connected to the third main body. The fifth connecting part is bent from the third main body toward the third wall so that the fifth connecting part and the fourth connecting part at least partially overlap.

19. The battery device according to claim 18, characterized in that, There are at least two limiting beams, and the at least two limiting beams are arranged at intervals along the first direction, and the battery cell assembly is disposed between two adjacent limiting beams; The battery device further includes a limiting member, the two ends of which are respectively connected to two different limiting beams, and the limiting member is connected to the fourth connecting part and / or the fifth connecting part of the corresponding limiting beam.

20. The battery device according to any one of claims 1-3, characterized in that, The first wall includes a third main body and a sixth connecting part connected to the third main body. The sixth connecting part is also connected to the housing. The sixth connecting part is bent from the third main body toward the direction where the battery cell assembly is located. The battery cell assembly is pressed against at least a portion of the sixth connecting part.

21. The battery device according to claim 20, characterized in that, The sixth connecting part is snapped into the housing.

22. The battery device according to claim 21, characterized in that, The sixth connecting part is provided with a fixing hole, and the box body is provided with a fixing post that can be inserted into the fixing hole.

23. The battery device according to claim 22, characterized in that, The fixing hole is a triangular hole, the fixing post is a triangular prism, and the shape of the fixing post is adapted to the shape of the fixing hole.

24. The battery device according to claim 20, characterized in that, The box body is provided with a receiving groove, and at least part of the sixth connecting part is received in the receiving groove.

25. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-24.

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