Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a first box body part and a battery monomer, the first box body part is provided with an accommodating cavity for accommodating a battery monomer, the first box body part comprises a side beam for limiting the accommodating cavity, and the side beam comprises a beam main body and a first embedded part; wherein the strength of the first embedded part is larger than that of the beam body, a first hole used for hoisting is formed in the side beam, and the first hole is formed in the first embedded part in the inside and outside direction of the containing cavity. According to the embodiment of the invention, the first embedded part can reinforce the beam body near the hoisting hole, so that the capability of resisting external impact is improved, and meanwhile, the cracking phenomenon caused by tensile stress concentration near the hoisting hole is relieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device. BACKGROUND

[0002] In the field of battery assembly, the box plays an important insulation role in the transfer and later use of the battery, and the structural strength thereof directly affects the reliability of the battery.

[0003] In the related art, the structural strength and economy of the box need to be further improved. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the application provide a battery device and a power utilization device, the battery device is additionally provided with a first embedded part with high material strength in the side beam of the first box part to improve the structural strength, so as to facilitate the transportation and transfer of the battery device.

[0005] In a first aspect, the embodiments of the application provide a battery device, the battery device comprising a first box part and a battery monomer; the first box part has a containing cavity for containing the battery monomer, and the first box part comprises a side beam for defining the containing cavity, the side beam comprising a beam main body and a first embedded part; wherein the strength of the first embedded part is greater than that of the beam main body, and the side beam is provided with a first hole for hoisting, the first hole being provided on the first embedded part along the outer-in direction of the containing cavity.

[0006] The first box part defines the containing cavity for containing the battery monomer through the side beam, the side beam is provided with the first embedded part with high strength, the first embedded part is connected with the beam main body of the side beam to improve the structural strength of the side beam, and the protection effect of the first box part on the battery monomer is improved. The first embedded part is also provided with the first hole along the outer-in direction of the containing cavity to provide a hoisting point outside the first box part, thereby reducing the probability of cracking of the beam main body with low strength during hoisting of the battery. In addition, the first embedded part and the side beam with different strengths can be formed respectively, which helps to control the production cost.

[0007] In some embodiments, the first embedded part comprises an embedded pipe, the embedded pipe extends in the axial direction along the length direction of the beam main body, the beam main body is provided with a second hole along the outer-in direction of the containing cavity, and the second hole is in communication with the first hole to expose the first hole.

[0008] In the embodiments of the application, the embedded pipe and the beam main body extend in the same direction to as much as possible improve the structural strength of the side beam, the beam main body is wrapped on the outer side of the embedded pipe to improve the consistency and connection stability of the beam main body and the embedded pipe, and the beam main body exposes the first hole through the second hole to realize the assembly of the hoisting part to the battery device.

[0009] In some embodiments, the first hole is provided on the outer wall of the embedded pipe away from the containing cavity, and a plurality of first holes are provided in the extension direction of the beam main body.

[0010] In the embodiments of the present application, the first holes are arranged on the outer side of the first box part for the lifting member to pass through, and multiple first holes are arranged to improve the lifting stability of the battery device.

[0011] In some embodiments, the first embedded part includes a nest extending in the same direction as the first hole, and the side beam further includes a support structure arranged circumferentially along the nest, and the nest is connected to the beam body through the support structure.

[0012] In the embodiments of the present application, the nest strengthens the beam body around it, and improves the consistency and connection stability of the nest and the beam body through the support structure.

[0013] In some embodiments, multiple nests are arranged along the extension direction of the beam body, and the nest includes a body part and a stepped part protruding from the body part, and the first hole is arranged in the body part.

[0014] In the embodiments of the present application, multiple nests provide multiple first holes to improve the lifting stability of the battery device, and the nest strengthens the bonding strength with the support structure through the relatively concave-convex body part and stepped part.

[0015] In some embodiments, the stepped part is provided with multiple stepped parts along the extension direction of the first hole.

[0016] In the embodiments of the present application, multiple stepped parts can form at least one groove with the body part, and the support structure penetrates the groove to further improve the bonding strength with the nest and enhance the tensile strength of the nest in the extension direction of the first hole.

[0017] In some embodiments, the nest further includes a protrusion arranged protruding from the stepped part, and the protrusion is continuously arranged at least along the extension direction of the first hole.

[0018] In the embodiments of the present application, the protrusion can enhance the tensile strength of the nest in the extension direction of the beam body, thereby further improving the bonding strength of the support structure and the nest.

[0019] In some embodiments, the beam body is an integral molding structure, the first embedded part is a metal structure, and the first embedded part and the accommodating cavity are separated by at least the beam body.

[0020] In the embodiments of the present application, the first embedded part made of metal can be pre-embedded in the molding mold of the beam body and form an integral structure with the beam body, thereby improving the consistency and structural strength of the side beam. The metal part and the accommodating cavity are separated by the beam body to meet the insulation requirements of the battery monomer.

[0021] In some embodiments, the first box part further includes a bottom plate for supporting the battery monomer, and the bottom plate and the side beam are an integral molding structure.

[0022] In the embodiments of the present application, the bottom plate and the side beam are integrally formed to improve the consistency and structural strength of the first box body part, and the bottom plate can jointly define the accommodating cavity with the side beam for mounting the battery monomer.

[0023] In some embodiments, the first box body part further comprises a second embedded part, and the second embedded part is connected with at least the bottom plate, and the strength of the second embedded part is greater than that of the bottom plate.

[0024] In the embodiments of the present application, the second embedded part can improve the structural strength of the bottom plate, thereby enhancing the load-bearing capacity of the first box body part for the battery monomer.

[0025] In some embodiments, the second embedded part comprises a first part and a second part connected with each other, the first part is embedded in the bottom plate, and the second part is embedded in the beam body.

[0026] In the embodiments of the present application, the second embedded part synchronously strengthens the bottom plate and the side beam through the first part and the second part.

[0027] In some embodiments, the second embedded part comprises a support frame and a filling base material, the strength of the support frame is greater than that of the bottom plate, the melting point of the support frame is greater than that of the bottom plate, and the filling base material is made of the same material as the bottom plate.

[0028] In the embodiments of the present application, during the injection molding of the bottom plate and the side beam, the filling base material can form a semi-melted state, so that the injection molding material and the support frame are better combined to improve the strengthening effect of the second embedded part on the first box body part.

[0029] In a second aspect, the embodiments of the present application provide a power utilization device, which comprises the battery device provided by any of the foregoing embodiments, and the battery device is used to provide electric energy. BRIEF DESCRIPTION OF DRAWINGS

[0030] 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 intended to limit the scope of the present application. Moreover, the same reference numerals are used throughout the drawings to represent similar components. In the drawings:

[0031] Figure 1 A structural schematic diagram of a vehicle of some embodiments of the present application;

[0032] Figure 2 An exploded structural schematic diagram of a battery device of some embodiments of the present application;

[0033] Figure 3 An exploded structural schematic diagram of a battery monomer of some embodiments of the present application;

[0034] Figure 4Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0035] Figure 5 Structure diagram of a first box part in a battery device according to an embodiment of the present application;

[0036] Figure 6 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 5 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0037] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 7 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 5 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0038] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 8 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 5 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0039] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 9 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0040] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 10 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 9 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0041] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 11 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 9 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0042] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 12 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 9 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0043] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Figure 13 Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0044] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0045] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0046] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0047] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0048] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0049] Structure diagram of a first box part in a battery device according to some embodiments of the present application; Structure diagram of a first box part in a battery device according to some embodiments of the present application;

[0050] 301, first hole; 31, embedded pipe; 311, outer wall; 312, top wall; 3121, third hole; 313, inner wall; 314, bottom wall; 32, nested; 321, body part; 322, step part; 323, support structure;

[0051] 42, second embedded part; 421, first part; 422, second part. DETAILED DESCRIPTION

[0052] The embodiments of the technical solutions of the present application will be described in detail below with reference to the 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.

[0053] 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 terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0054] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0055] In this paper, the phrase "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0056] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship between 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 a "or" relationship between the front and rear associated objects.

[0057] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0058] In the description of the embodiments of the present application, the orientations or positional relationships indicated by 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 are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0059] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or 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.

[0060] With the continuous expansion of the application field of power batteries, the market demand is also increasing. As a direct current carrier of power batteries, the battery box bears the role of resisting external impact and providing support and protection for the battery, ensuring the safety and reliability of the battery during driving or transportation.

[0061] Generally, in the battery assembly technology, the battery box with the battery installed is transported and transferred as a single unit, and the transfer mode includes hoisting and the like. Among them, the battery box is integrally formed by injection molding process to realize the protection of the battery while controlling the production cost. However, the rigidity of the injection molded box is insufficient, and when encountering external impact, it may deform greatly, and the internal battery cannot be effectively supported during hoisting, and the hoisting hole is prone to cracking.

[0062] In the related art, part of the non-metal box body is made by splicing process, and the injection molded parts, metal parts and glass fiber reinforced material parts are formed by assembling, welding, locking and the like to improve the structural strength of the box body. However, the preparation of such a box body has the problems of complex process and tedious process, which is not conducive to controlling the production cost, and the consistency between different material components is poor.

[0063] Based on the above considerations, in order to balance the structural strength and production cost of the battery box, the embodiment of the present application provides a battery device, a first embedded part is arranged at the side beam part of the first box body part, the first embedded part has higher strength, and a first hole for lifting is arranged in the first embedded part, the first embedded part can disperse the load applied to the beam body through the lifting hole during lifting, thereby reducing the probability of cracking of the first box body part near the lifting hole. At the same time, the first box body part can be made of at least two kinds of materials, which reduces the processing procedure and the process difficulty, and helps to control the production cost.

[0064] The technical solution described in the embodiment of the present application is applicable to a battery device and a power consumption device using a battery.

[0065] The present application provides a power consumption device using a battery device as a power supply, which can be but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, 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., and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0066] The following embodiments are described for convenience with a power consumption device of an embodiment of the present application as an example of a vehicle 1000.

[0067] Please refer to Figure 1 , Figure 1 The structural schematic diagram of the vehicle 1000 provided by some embodiments of the present application is shown. 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 device 100, which can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300, the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0068] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the 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.

[0069] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0070] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0071] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0072] In some embodiments, the battery apparatus 100 can be a battery pack including a case and one or more battery cell assemblies accommodated in the case.

[0073] As an example, the battery cell assembly can be a battery module, which can be accommodated in the case by fixing the battery module in the case.

[0074] As an example, the battery cell assembly can also be accommodated in the case by directly fixing a plurality of battery cells in the case.

[0075] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging the battery cell.

[0076] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0077] Please refer to Figure 2 , Figure 2 The exploded structural diagram of the battery apparatus 100 provided in some embodiments of the present application is shown. The battery apparatus 100 includes a case 10 and a battery cell assembly 20 accommodated in the case 10.

[0078] The box 10 is used to accommodate the battery monomer assembly 20, and the box 10 can be of various structures. In some embodiments, the box 10 can include a second box part 11 and a first box part 12, the second box part 11 and the first box part 12 are mutually covered, and the second box part 11 and the first box part 12 jointly define an accommodation part for accommodating the battery monomer assembly 20. The first box part 12 can be a hollow structure with one end open, and the second box part 11 is a plate structure, which is covered on the open side of the first box part 12 to form the box 10 with the accommodation part; the second box part 11 and the first box part 12 can also be hollow structures with one side open, and the open side of the second box part 11 is covered on the open side of the first box part 12 to form the box 10 with the accommodation part. Of course, the second box part 11 and the first box part 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0079] In some embodiments, the box can be part of the chassis structure of the vehicle 1000. For example, part of the box can be at least part of the floor of the vehicle 1000, or part of the box can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0080] In some embodiments, the battery device 100 can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0081] Referring to Figure 3 , Figure 3 A structural schematic diagram of a battery monomer assembly 20 provided by an embodiment of the present application is shown. The battery monomer assembly 20 includes a plurality of battery monomers 2121, which are connected in series or in parallel or in a mixed connection to form the battery monomer assembly 20, and then the battery monomer assembly 20 is accommodated in the box.

[0082] For example, the battery monomer 2121 can be a cylindrical battery monomer 21, a prismatic battery monomer 21, a soft-pack battery monomer 21, or other shapes of battery monomers 21, but is not limited thereto. The prismatic battery monomer 21 includes a square case battery monomer 21, a blade-shaped battery monomer 21, a multi-prismatic battery, such as a hexagonal prism battery, etc.

[0083] Referring to Figure 4 and Figure 5 or Figure 9 , the present application provides a battery device, which includes a first box part 12 and a battery monomer 21, the first box part 12 has an accommodation cavity for accommodating the battery monomer 21, the first box part includes a side beam 122 for defining the accommodation cavity, and the side beam 122 includes a beam main body and a first embedded part; wherein the strength of the first embedded part is greater than the strength of the beam main body, the side beam is provided with a first hole for hoisting, and the first hole is provided on the first embedded part in the outward and inward direction of the accommodation cavity.

[0084] The side beam 122 refers to a beam structure for limiting the movement of the battery monomer 21 in the horizontal plane.

[0085] The first hole 301 refers to a through hole structure penetrating at least part of the first embedded part in the outward direction of the accommodation cavity. The hoisting member can pass through the first hole 301 and realize the hoisting and transportation of the entire battery device through the first embedded part.

[0086] Therefore, the first embedded part with higher strength can significantly improve the structural strength of the side beam 122 and improve the resistance effect of the side beam 122 to external impact. During the hoisting and transportation of the battery device, the hoisting member is arranged in the first hole 301 to realize the lifting of the first box body 12 and the battery monomer 21 inside. The pulling force of the hoisting member on the battery device can be dispersed and uniformly distributed to the side beam 122 around the hoisting hole through the first embedded part. The first embedded part with higher strength can improve the tensile strength of the side beam 122 and reduce the probability of deformation of the side beam 122 due to uneven stress or excessive tensile stress during hoisting.

[0087] In an ideal case, the first box body 12 can be made of two materials, i.e., the first embedded part with higher strength and the beam body with lower strength, which can shorten the process as much as possible and reduce the processing difficulty, thereby facilitating the control of production cost while improving the structural strength of the first box body 12.

[0088] According to some embodiments of the present application, referring to Figure 5 or Figure 9 , the side beam 122 includes a pair of first side beams 1221 and a pair of second side beams 1222, and the two first side beams 1221 are connected by the two second side beams 1222.

[0089] The first side beam 1221 is a side beam extending in the thickness direction of the battery monomer 21, and the second side beam 1222 is a side beam extending in the width direction of the battery monomer 21. The first side beam 1221 is perpendicular to the second side beam 1222.

[0090] For example, the first embedded part is connected with the beam body of the first side beam 1221, or the first embedded part is connected with the beam body of the second side beam 1222, or the beam body of the first side beam 1221 and the beam body of the second side beam 1222 are both provided with the first embedded part.

[0091] Therefore, the first embedded part can be set according to the hoisting requirement and can be strengthened for the first side beam 1221 or the second side beam 1222.

[0092] According to some embodiments of the present application, the beam body is an integrally formed structure.

[0093] Optionally, the beam body is made of insulating material to meet the insulation requirement of the battery monomer 21.

[0094] Optionally, the beam body is integrally formed through an injection molding process. The injection molding process is mature, which helps to balance the strength and cost control of the beam body.

[0095] Optionally, the material strength of the first embedded part is greater than that of the beam body.

[0096] Optionally, the first embedded part is a metal structure, please refer to Figure 7 or Figure 11 The first embedded part is spaced apart from the accommodating cavity at least by the beam body.

[0097] In this way, the first embedded part can be embedded in the forming mold of the beam body in advance and combined with the beam body into an integral structure during the forming of the beam body, thereby improving the structural strength of the side beam 122.

[0098] The following will be described by taking the first embedded part arranged in the first side beam 1221 as an example.

[0099] According to some embodiments of the present application, optionally, please refer to Figure 6 to Figure 8 The first embedded part includes an embedded pipe 31, the embedded pipe 31 extends in the same direction as the first side beam 1221, and the first side beam 1221 is arranged in a circumferential cladding manner along the embedded pipe 31. The first side beam 1221 is provided with a second hole, and the second hole is in communication with the first hole 301.

[0100] The embedded pipe 31 extends in the same direction as the first side beam 1221, which means that the axis direction of the embedded pipe 31 extends in the same direction as the beam body of the first side beam 1221. For example, when the first side beam 1221 extends in the thickness direction of the battery monomer 21, the embedded pipe 31 also extends in the thickness direction of the battery monomer 21.

[0101] Optionally, the shape of the second hole is consistent with that of the first hole 301, or the shape of the second hole is greater than that of the first hole 301, so that the first hole 301 can be completely exposed to accommodate the lifting part to realize the lifting of the battery device.

[0102] In this way, the embedded pipe 31 is arranged along the length direction of the first side beam 1221 to further improve the reinforcing effect of the first side beam 1221, and the first side beam 1221 is arranged in a circumferential cladding manner to realize the relative fixation of the first side beam 1221 and the embedded pipe 31.

[0103] According to some embodiments of the present application, optionally, please refer to Figure 7 The cross section of the embedded pipe 31 is rectangular, and the embedded pipe 31 includes a top wall 312, an outer wall 311, a bottom wall 314, and an inner wall 313 connected in sequence. The first hole 301 is arranged in the outer wall 311 away from the accommodating cavity.

[0104] The outer wall 311 is perpendicular to the second edge beam 1222, and the first hole 301 extends in a direction perpendicular to the outer wall 311.

[0105] Further optionally, the first hole 301 is arranged in plurality along the extension direction of the outer wall 311, so that the first box body 12 forms a plurality of hoisting holes, which is conducive to improving the hoisting stability of the battery device as a whole.

[0106] Further optionally, the embedded pipe 31 is further provided with a third hole 3121, the third hole 3121 is arranged on the top wall 312, the first edge beam 1221 is provided with a fourth hole in communication with the third hole 3121 to expose the third hole 3121, so that the first box body 12 can be provided with a connecting piece through the third hole 3121 and the fourth hole, and the relative fixation of the first box body 12 and the second box body 11 is realized.

[0107] Therefore, the embedded pipe 31 is arranged as a square pipe, which can improve the bonding strength of the embedded pipe 31 and the first edge beam 1221 on the one hand, and the square pipe is convenient to purchase or prepare, which helps to control the production cost of the battery device.

[0108] According to some embodiments of the present application, referring to Figure 9 and Figure 10 , the first embedded part includes a nest 32, the nest 32 extends in the same direction as the first hole 301, the first edge beam 1221 includes a support structure 323 arranged circumferentially along the nest 32, and the nest 32 is connected to the beam body of the first edge beam 1221 through the support structure 323.

[0109] The support structure 323 and the beam body are an integral structure, or the support structure 323 and the beam body are detachably connected. Illustratively, the support structure 323 and the beam body of the first edge beam 1221 are integrally formed by an injection molding process.

[0110] Optionally, the support structure 323 includes a plurality of ribs arranged in the radial direction of the support structure 323, the two ends of the ribs abut against the first embedded part and the beam body respectively, so as to realize the relative fixation of the first embedded part and the first edge beam 1221. Illustratively, the ribs are arranged in the radial direction of the first hole 301.

[0111] Therefore, the nest 32 can strengthen the hoisting hole of the first edge beam 1221 in a small range, which helps to reduce the production cost of the first box body 12.

[0112] According to some embodiments of the present application, the nest 32 is arranged in plurality along the extension direction of the first edge beam 1221.

[0113] Therefore, the edge beam where the nest 32 is arranged can form a plurality of hoisting holes, which improves the hoisting stability of the battery device.

[0114] According to some embodiments of the present application, referring to Figure 11 and Figure 12 , the nest 32 comprises a body portion 321 and a step portion 322 protruding from the body portion 321, and the first hole 301 is formed in the body portion 321.

[0115] In some embodiments, referring to Figure 12 , the body portion 321 has a circular or approximately circular shape, such as an elliptical shape, in the cross section along the extension direction of the first edge beam 1221, i.e., the outer circumferential surface of the body portion 321 is a smooth transition structure, so as to improve the load distribution effect of the body portion 321 on the surrounding beam body.

[0116] In other embodiments, the body portion 321 has a polygonal shape, such as a triangular, rectangular, pentagonal or hexagonal shape, in the cross section along the extension direction of the first edge beam 1221, so as to improve the bonding strength of the body portion 321 with the beam body.

[0117] Optionally, the step portion 322 is continuously arranged along the circumference of the body portion 321, or the step portion 322 is only partially arranged along the circumference of the body portion 321, i.e., the corresponding central angle of the step portion 322 with respect to the body portion 321 is less than 360°.

[0118] Thus, the nest 32 has more contact area with the beam body in the circumferential direction of the body portion 321, and meanwhile, the step portion 322 can increase the tensile strength of the nest 32 in the extension direction of the first hole 301, so as to improve the bonding strength of the nest 32 with the beam body.

[0119] According to some embodiments of the present application, referring to Figure 11 , the step portion 322 is arranged in multiple along the extension direction of the first hole 301.

[0120] Optionally, the multiple step portions 322 are continuously arranged along the circumference of the body portion 321, or a part of the step portions 322 are continuously arranged along the circumference of the body portion 321, and another part of the step portions 322 are only partially arranged along the circumference of the body portion 321.

[0121] Thus, the contact area of the nest 32 with the beam body is further increased by the step portion 322, so as to improve the bonding strength of the nest 32 with the beam body.

[0122] According to some embodiments of the present application, the nest 32 further comprises a protrusion protruding from the step portion 322, and the protrusion is continuously arranged at least along the extension direction of the first hole 301.

[0123] Optionally, the protrusion is spirally arranged on the step portion 322, so as to improve the bonding strength of the step portion 322 with the beam body.

[0124] Therefore, the bonding strength between the stepped portion 322 and the beam body is further improved, so that the connection between the nest 32 and the beam body is more stable.

[0125] According to some embodiments of the present application, the first embedded part is provided with the embedded pipe 31 and the nest 32 at the same time, and the nest 32 is relatively fixedly connected with the embedded pipe 31 through the stepped portion 322, so as to simultaneously realize structural enhancement of the first side beam 1221 and the hoisting hole.

[0126] According to some embodiments of the present application, the first box body portion further comprises a bottom plate.

[0127] The bottom plate 121 refers to a plate-shaped structure for directly supporting the battery monomer 21, and the side beam 122 is arranged on one side of the plate-shaped structure and is arranged around the plate-shaped structure in the circumferential direction. The side beam 122 and the bottom plate 121 form an open side of the accommodating cavity to realize the putting in or taking out of the battery monomer 21, and the side beam 122 and the bottom plate 121 form a fixing effect on the battery monomer 21.

[0128] Optionally, the bottom plate 121 and the side beam 122 are integrally formed by injection molding, so as to facilitate rapid molding of the bottom plate 121 and the side beam 122.

[0129] Therefore, the bottom plate 121 and the side beam 122 can be quickly prepared and molded, and the overall consistency of the first box body portion 12 is improved.

[0130] According to some embodiments of the present application, the first box body portion 12 further comprises a second embedded part 42, please refer to Figure 13 The second embedded part 42 is at least connected with the bottom plate 121, and the strength of the second embedded part 42 is greater than that of the bottom plate 121.

[0131] Optionally, the material strength of the second embedded part 42 is greater than that of the bottom plate 121.

[0132] Optionally, the second embedded part 42 comprises a plate-shaped structure embedded in the bottom plate 121, and the plate-shaped structure is made of insulating material.

[0133] Optionally, the second embedded part 42 is directly laid above the bottom plate 121 and is relatively fixedly connected with the bottom plate 121 through clamping or other forms, and the second embedded part 42 directly supports the battery monomer 21. It can be understood that the second embedded part 42 is made of insulating material at this time.

[0134] Therefore, the second embedded part 42 can be embedded in the injection mold in advance and combined with the bottom plate 121 as a whole in the injection molding process. The second embedded part 42 can at least improve the structural strength of the bottom plate 121, so that the first box body portion 12 has better supporting capacity for the battery monomer 21, and the deformation amount of the bottom plate 121 during hoisting and transfer of the battery device is reduced.

[0135] According to some embodiments of the present application, referring to Figure 13 The second embedded part 42 comprises a first part 421 and a second part 422 connected with each other, the first part 421 is embedded in the bottom plate 121, and the second part 422 is embedded in the beam body.

[0136] Optionally, the extension direction of the second part 422 is inclined relative to the height direction of the battery monomer 21, so as to facilitate the stripping of the first box body part 12 after injection molding.

[0137] Optionally, the first part 421 and the second part 422 are an integral structure, or the first part 421 and the second part 422 are two components fixedly connected with each other.

[0138] Therefore, the second embedded part 42 can simultaneously strengthen the bottom plate 121 and the side beam 122, so as to further improve the lifting stability of the battery device.

[0139] According to some embodiments of the present application, the second embedded part 42 comprises a filling base material and a support frame, the material strength of the support frame is greater than that of the bottom plate 121, and the melting point of the support frame is greater than that of the bottom plate 121.

[0140] In an embodiment, the filling base material is the same as the material of the bottom plate 121. In this embodiment, during the injection molding of the bottom plate 121, the filling base material with the same melting point can be partially melted and in a semi-melted state, so that the support frame exposes part of the pores to accommodate the bottom plate 121, so that the second embedded part 42 and the bottom plate 121 are better integrated.

[0141] Optionally, the support frame is made of an insulating material to improve the insulation performance of the second embedded part 42.

[0142] Therefore, the support frame can remain stable during the injection molding of the bottom plate 121 and be combined with the bottom plate 121, so as to improve the bearing capacity of the bottom plate 121.

[0143] Please refer to Figure 5 to Figure 8 In an embodiment, the first embedded part is an embedded pipe 31, the embedded pipe 31 is embedded in the first side beam 1221, the embedded pipe 31 is a square tube structure, wherein the outer wall 311 is provided with three first holes 301 along the extension direction of the first side beam 1221 for lifting, and the top wall 312 is provided with twelve third holes 3121 along the extension direction of the first side beam 1221 for connecting with the second box body part 11.

[0144] Please refer to Figure 9 to Figure 12In one embodiment, the first embedded part is a nest 32, and is fixed to the first side beam 1221 by a plurality of ribs extending radially along the first hole 301. Two nests 32 are arranged in the extension direction of the first side beam 1221. The nest 32 comprises a body portion 321 and a step portion 322 protruding from the body portion 321, and the first hole 301 is formed in the body portion 321.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the same. 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 replacements for some or all of the technical features. Such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any way as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a battery cell; a first box body having a receiving cavity for accommodating the battery cell, the first box body comprising a side beam for defining the receiving cavity, the side beam comprising a beam body and a first embedded part; wherein the first embedded part has a strength greater than that of the beam body, the side beam is provided with a first hole for hoisting, the first hole is provided on the first embedded part in an outward-inward direction of the receiving cavity.

2. The battery device according to claim 1, characterized by The first embedded part comprises a pipe-embedded part, an axial direction of the pipe-embedded part extends along a length direction of the beam body, the beam body covers the pipe-embedded part, the beam body is provided with a second hole in the outward-inward direction of the receiving cavity, the second hole is in communication with the first hole to expose the first hole.

3. The battery device of claim 2, wherein, The first hole is provided on an outer wall of the pipe-embedded part away from the receiving cavity, and the first hole is spaced apart in the extension direction of the beam body.

4. The battery device of claim 1, wherein The first embedded part comprises a nest extending in the same direction as the first hole, the side beam further comprises a support structure arranged in a circumferential direction of the nest, and the nest is connected to the beam body through the support structure.

5. The battery device of claim 4, wherein, In the extension direction of the beam body, the nest is provided with a plurality of nests, the nest comprises a body part and a stepped part protruding from the body part, and the first hole is provided in the body part.

6. The battery device of claim 5, wherein, In the extension direction of the first hole, the stepped part is provided with a plurality of stepped parts; and / or The nest further comprises a protrusion protruding from the stepped part, and the protrusion is continuously arranged in at least the extension direction of the first hole.

7. The battery device of claim 1, wherein The beam body is an integral molding structure, the first embedded part is a metal structure, and the first embedded part is spaced apart from the receiving cavity at least through the beam body.

8. The battery device according to claim 1 or 7, characterized by The first box body further comprises a bottom plate for supporting the battery cell, and the bottom plate and the side beam are an integral molding structure.

9. The battery device of claim 8, wherein, The first box body further comprises a second embedded part, the second embedded part is connected to at least the bottom plate, and the second embedded part has a strength greater than that of the bottom plate.

10. The battery device of claim 9, wherein, The second embedded part comprises a first part and a second part connected to each other, the first part is embedded in the bottom plate, and the second part is embedded in the beam body.

11. The battery device of claim 9, wherein, The second embedded part comprises a support frame and a filling base material, the support frame has a strength greater than that of the bottom plate, the support frame has a melting point greater than that of the bottom plate, and the filling base material has the same material as the bottom plate.

12. An electrical device, characterized by The battery device comprises the battery device according to any one of claims 1 to 11, and is used for providing electric energy.

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