Battery device, energy storage equipment and electric equipment

Abstract

The utility model discloses a battery device, energy storage equipment and electric equipment, relates to the technical field of batteries, and can reduce the production cost of a battery box and improve the assembly efficiency of the battery box. The battery device comprises single batteries and a battery box, the battery box comprises a box body, a cover body and a connecting structure, and the cover body is connected with the box body to form a closed space for accommodating the single batteries; the connecting structure comprises a connecting piece and a connecting hole, the connecting hole is formed in one of the box body and the cover body, the first end of the connecting piece is connected to the other one of the box body and the cover body, the second end of the connecting piece is provided with a limiting part, and the limiting part is located on the side, away from the first end of the connecting piece, of the connecting hole and used for connecting the box body and the cover body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device, energy storage equipment and electric equipment. BACKGROUND

[0002] The battery device is increasingly widely used in life and industry. The battery box, as the core bearing and protection structure of the battery device, directly affects the overall competitiveness of the battery device in terms of assembly efficiency and cost. In the related art, the battery box has the problems of high production cost and low assembly efficiency. UTILITY MODEL CONTENT

[0003] The present application provides a battery device, energy storage equipment and electric equipment, which can reduce the production cost of the battery box and improve the assembly efficiency of the battery box.

[0004] The present application is implemented through the following technical solutions.

[0005] The first aspect of the present application provides a battery device, which comprises a battery monomer and a battery box. The battery box comprises a box body, a cover body and a connecting structure. The cover body is connected with the box body to form a closed space for accommodating the battery monomer. The connecting structure comprises a connecting piece and a connecting hole. The connecting hole is arranged on one of the box body and the cover body. The first end of the connecting piece is connected to the other one of the box body and the cover body. The second end of the connecting piece has a limiting part. The limiting part is located on the side of the connecting hole away from the first end of the connecting piece, so as to connect the box body and the cover body.

[0006] In the technical solution of the present application, the box body and the cover body of the battery box are connected to form a closed space for installing the battery monomer. The connecting hole of the connecting structure is arranged on one of the box body and the cover body. The first end of the connecting piece is connected to the other one of the box body and the cover body, and is fixed as an integral structure. In this way, the connecting hole is arranged on one of the box body and the cover body, and the connecting piece is connected to the other one of the box body and the cover body, so that the connecting structure is arranged on the box body and the cover body, thereby reducing the number of parts of the battery box and thus reducing the material cost of the battery box. The second end of the connecting piece has a limiting part. The limiting part is located on the side of the connecting hole away from the first end of the connecting piece, so as to connect the box body and the cover body. In this way, during assembly, the box body and the cover body are connected by buckling, so that the second end of the connecting piece passes through the connecting hole, and the limiting part of the second end of the connecting piece is located on the side of the connecting hole away from the first end of the connecting piece, so as to cooperate with the hole on the side of the connecting hole to prevent the connecting piece from being pulled out of the connecting hole, thereby completing the connection between the box body and the cover body, and the assembly process is relatively simple.

[0007] In some embodiments of the present application, the box body has an accommodating cavity formed therein. The accommodating cavity has an opening. The cover body is connected to the opening to form the closed space. The first end of the connecting piece is connected to the periphery of the opening.

[0008] Here, the opening of the box body can provide a clear and stable reference surface for the installation of the cover body, the first end of the connecting piece is connected to the periphery of the opening of the box body, so that the plane of the opening can also serve as the reference surface of the connecting piece and the connecting hole, simplifying the positioning between the box body and the cover body, and further improving the assembly efficiency between the box body and the cover body.

[0009] In some embodiments of the present application, the connecting structure further comprises a flange arranged at the periphery of the opening for abutting engagement with the cover body, and the connecting piece is fixedly connected to the box body through the flange, the flange and the connecting piece are made of the same material, and the flange and the box body are made of different materials.

[0010] Here, the flange arranged at the periphery of the opening of the box body can enhance the rigidity and strength of the opening to resist deformation caused by external force and internal stress. The first end of the connecting piece is connected to the flange, so that the flange and the connecting piece jointly bear the core function of mechanical connection. Therefore, the flange and the connecting piece need to have similar mechanical properties, such as high strength and high rigidity. The main function of the box body is to contain, protect and support internal components (such as battery monomers), and the material selection thereof focuses more on lightweight, cost, insulation and easy processability. The use of different materials for the flange and the connecting piece and the box body allows the flange and the connecting piece to be made of appropriate materials according to functional needs, without sacrificing performance or cost for the sake of material uniformity.

[0011] In some embodiments of the present application, the battery box comprises a first injection-molded part and a second injection-molded part connected together, the first injection-molded part comprises the box body, and the second injection-molded part comprises the connecting piece, the hardness of the second injection-molded part is greater than the hardness of the first injection-molded part.

[0012] Here, the box body and the connecting piece are formed by double-material injection molding, which can reduce the number of parts and assembly processes, and improve the production efficiency. The second injection-molded part has a higher hardness than the first injection-molded part. Higher-hardness plastic generally has better rigidity and can withstand greater fastening force, thereby ensuring the reliability of the connection.

[0013] In some embodiments of the present application, the second injection-molded part comprises the connecting piece and the flange, and the connecting piece and the flange are integrally connected.

[0014] Here, the second injection-molded part comprises the connecting piece and the flange, and the connecting piece and the flange are integrally connected, so that the second injection-molded material with higher hardness can strengthen the flange and the connecting piece into an integral force-bearing structure, thereby improving the structural reliability of the battery box.

[0015] In some embodiments of the present application, a plurality of connecting pieces are provided, the number of connecting holes is the same as the number of connecting pieces, and the plurality of connecting pieces are arranged at the periphery of the opening in a spaced manner.

[0016] Here, the connecting pieces and the connecting holes are provided in plurality, and the connecting pieces and the connecting holes are in one-to-one correspondence, so that the connecting load between the box body and the cover body can be shared by the plurality of connecting pieces, so that each connecting piece only needs to bear a small part of the force, greatly reducing the risk of overload failure of a single connecting point.

[0017] The limiting part is made of plastic material, and in the case that the limiting part is subjected to a force exceeding a target threshold, the limiting part can plastically deform.

[0018] Here, the limiting part is a plastic limiting part made of plastic material. The plastic limiting part facilitates mechanical locking by means of automated equipment. Before the plastic limiting part deforms under force, its size allows it to pass smoothly through the connecting hole; after being subjected to an external force in a particular direction, the shape of the plastic limiting part changes irreversibly, the size increases, and thus it is stuck on the other side of the connecting hole, forming a mechanical lock.

[0019] In some embodiments of the present application, the limiting part is a rotating body, the connecting hole is a circular hole, the limiting part is coaxially arranged with the connecting hole, and the radial size of the limiting part is greater than the radial size of the connecting hole.

[0020] Here, the limiting part is coaxially arranged with the connecting hole, which can avoid unilateral scraping caused by eccentricity. The radial size of the limiting part is greater than the radial size of the connecting hole, which can prevent the limiting part from passing through the connecting hole and improve the reliability of the connection.

[0021] In some embodiments of the present application, the shape of the limiting part is hemispherical, and the side of the connecting hole away from the first end of the connecting piece is in abutting engagement with the planar side of the limiting part.

[0022] Here, the side of the connecting hole away from the first end of the connecting piece is in abutting engagement with the planar side of the limiting part, which can achieve large-area and tight abutting engagement between the limiting part and the connecting hole, thereby improving the reliability of the connection.

[0023] In some embodiments of the present application, the shape of the limiting part is cylindrical.

[0024] Here, the shape of the limiting part is cylindrical, and both end faces of the cylindrical shape are planar. In this way, one end face of the limiting part can be in abutting engagement with the side of the connecting hole away from the first end of the connecting piece to increase the contact area; the other end face of the limiting part can be in contact with the supporting base to improve the stability of the placement of the battery box.

[0025] In some embodiments of the present application, the size of the limiting part is less than or equal to 10 mm along the extension direction of the connecting hole.

[0026] Herein, the size of the limiting portion is less than or equal to 10 mm along the extension direction of the connecting hole, so that the gap between the battery boxes can be very small when the battery boxes are stacked, and a higher stacking density can be achieved, thereby improving the energy density of the energy storage device.

[0027] In some embodiments of the present application, the connecting piece is a columnar structure, and the shape of the connecting piece is matched with the shape of the connecting hole.

[0028] Herein, the connecting piece is a columnar structure, and the shape of the connecting piece is matched with the shape of the connecting hole. On the one hand, the contact area between the connecting piece and the connecting hole can be increased, and the uniformity of force transmission can be improved, thereby avoiding stress concentration. On the other hand, the radial swing and micro-motion of the connecting piece in the connecting hole can be inhibited, so that the riveted joint (i.e., the limiting portion) formed finally can also be prevented from being skewed, asymmetric, and uneven in strength when hot riveting is performed.

[0029] The second aspect of the present application provides an energy storage device, comprising the battery device provided in the above embodiments.

[0030] In the technical solution of the embodiments of the present application, since the energy storage device comprises the battery device in the above embodiments, the same beneficial effects can be achieved, i.e., the production cost of the battery box can be reduced, and the assembly efficiency of the battery box can be improved.

[0031] The third aspect of the present application provides a power utilization device, comprising the battery device provided in the above embodiments for providing electric energy.

[0032] In the technical solution of the embodiments of the present application, since the power utilization device comprises the battery device in the above embodiments, the same beneficial effects can be achieved, i.e., the production cost of the battery box can be reduced, and the assembly efficiency of the battery box can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] 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 intended to depict only preferred embodiments of the application, and therefore should not be considered to limit the scope of the application in any way. Furthermore, the drawings are provided for purposes of illustration only and merely depict typical or example embodiments of the application. The drawings shown are not necessarily to scale, and in some instances, certain features can have been omitted for clarity. In the drawings:

[0034] Figure 1 The power utilization device provided for some embodiments of the present application is a structural schematic diagram of a vehicle;

[0035] Figure 2 The structural schematic diagram of the battery device provided for some embodiments of the present application is shown in FIG. 4;

[0036] Figure 3 The structural schematic diagram of the battery box of the battery device provided for some embodiments of the present application is shown in FIG. 5.

[0037] Figure 4 For Figure 3 Enlarged view at A in Figure 1;

[0038] Figure 5 Structural schematic diagram of the limiting part of the battery device after stress deformation for some embodiments of the present application;

[0039] Figure 6 Structural schematic diagram of the box of the battery device for some embodiments of the present application;

[0040] Figure 7 Structural schematic diagram of the cover of the battery device for some embodiments of the present application.

[0041] Legend of reference signs

[0042] 1000 - electrical equipment; 100 - battery device; 200 - controller; 300 - motor; 1 - battery box; 11 - box; 111 - accommodating cavity; 112 - opening; 12 - cover; 13 - connecting structure; 131 - connecting piece; 1311 - limiting part; 132 - connecting hole; 133 - flange; 2 - battery monomer. DETAILED DESCRIPTION

[0043] The embodiments of the technical solutions of the present application will be described in detail below in conjunction with 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.

[0044] 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 the present 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.

[0045] In the description of the embodiments of the present application, the technical terms "first", "second", "third" and the like 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 specified.

[0046] Reference to“an embodiment” herein 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 appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0047] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character“ / ” herein generally means that the front and rear associated objects are“or” relationship.

[0048] In the description of the embodiments of the application, the technical terms“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“circumferential” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed in a particular orientation, operate or be used, and therefore cannot be understood as a limitation on the embodiments of the application.

[0049] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing” and the like 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 meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0050] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical term“contact” should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, which can be contact between two objects in contact without interaction force, or contact between two objects in contact with interaction force.

[0051] The application will be described in detail below.

[0052] Battery devices are increasingly widely used in life and industry, and battery boxes, as the core bearing and protection structure of battery devices, directly affect the overall competitiveness of the entire battery device in terms of assembly efficiency and cost.

[0053] In related technologies, a battery box includes a casing and a cover, which are connected and fixed together by screws and nuts. Connecting the casing and cover typically requires multiple sets of screws and nuts, increasing the number of battery box components and thus raising material costs. Furthermore, the screws and nuts require manual pre-installation during the connection process, which cannot be automated, affecting assembly efficiency. Additionally, stripping of the screws and rivet nuts during the fastening process further impacts the battery box assembly efficiency.

[0054] It is evident that the connection method between the battery box body and the cover has a significant impact on assembly efficiency and production costs. Therefore, to reduce the production cost of battery boxes and improve their assembly efficiency, it is necessary to optimize the connection method between the body and the cover.

[0055] Based on this design concept, this application provides a battery device 100, an energy storage device, and an electrical device 1000 to reduce the production cost of the battery box and improve its assembly efficiency.

[0056] Electrical equipment 1000 can include, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, vehicles, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0057] The battery device 100 disclosed in this application embodiment can be used in electrical equipment 1000 that uses batteries as power sources, or as energy storage devices, wherein energy storage devices include energy storage containers, energy storage cabinets, etc.

[0058] In the following embodiments, for ease of explanation, an example of an electrical device according to an embodiment of this application is a vehicle.

[0059] Figure 1 The diagram illustrates the structure of a vehicle as provided in some embodiments of this application. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended vehicles, etc. Figure 1 As shown, a battery device 100 is installed inside the vehicle. The battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller is used to control the battery device 100 to supply power to the motor, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0060] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source of the vehicle, but also serve as a driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0061] In some embodiments of the present application, the energy storage device includes but is not limited to an energy storage container, an energy storage cabinet, a household energy storage device, an industrial and commercial energy storage device, an aerospace energy storage device, a toy energy storage device, etc. The household energy storage device can include a mobile power supply, a power bank, an outdoor power supply, etc. The industrial and commercial energy storage device can include a large battery pack, an energy storage power station, etc. The aerospace energy storage device can include an auxiliary power battery of an airplane. The toy energy storage device can include a battery for an electric toy, a built-in power supply for a game console, etc.

[0062] In some embodiments of the present application, refer to Figure 2 , Figure 3 and Figure 4 , Figure 2 the structural schematic diagram of the battery device 100 provided in some embodiments of the present application is shown in FIG. 1; Figure 3 the structural schematic diagram of the battery box 1 provided in some embodiments of the present application is shown in FIG. 2; Figure 4 is an enlarged view of A in FIG. 1. Figure 3

[0063] In the embodiments of the present application, the battery device includes the battery box 1 and the battery monomer 2. The battery box 1 includes the box body 11, the cover body 12, and the connecting structure 13. The cover body 12 is connected with the box body 11 to form a closed space for accommodating the battery monomer 2. The connecting structure 13 includes the connecting piece 131 and the connecting hole 132. The connecting hole 132 is arranged on one of the box body 11 and the cover body 12. The first end of the connecting piece 131 is connected to the other one of the box body 11 and the cover body 12. The second end of the connecting piece 131 has the limiting part 1311. The limiting part 1311 is located on the side of the connecting hole 132 away from the first end of the connecting piece 131, so as to connect the box body 11 and the cover body 12.

[0064] ​In the technical scheme of the embodiment of the present application, the battery device comprises a battery box 1 and a battery cell 2, the battery box 1 comprises a box body 11, a cover body 12 and a connecting structure 13. The box body 11 is connected with the cover body 12 to form a closed space for mounting the battery cell 2. The connecting hole 132 of the connecting structure 13 is arranged on one of the box body 11 and the cover body 12, and the first end of the connecting piece 131 is connected to the other one of the box body 11 and the cover body 12. In this way, the connecting hole 132 is arranged on one of the box body 11 and the cover body 12, and the connecting piece 131 is connected with the other one of the box body 11 and the cover body 12, so that the connecting structure 13 is integrally arranged on the box body 11 and the cover body 12, thereby reducing the number of parts of the battery box 1 and thus reducing the material cost of the battery box 1. The second end of the connecting piece 131 has a limiting portion 1311, which is located on the side of the connecting hole 132 away from the first end of the connecting piece 131, so as to realize the connection between the box body 11 and the cover body 12. In this way, during assembly, the box body 11 and the cover body 12 are connected by buckling, so that the second end of the connecting piece 131 passes through the connecting hole 132, and the limiting portion 1311 of the second end of the connecting piece 131 is located on the side of the connecting hole 132 away from the first end of the connecting piece 131. The limiting portion 1311 can be matched with the hole on the corresponding side of the connecting hole 132 to prevent the connecting piece 131 from being pulled out of the connecting hole 132, thereby completing the connection between the box body 11 and the cover body 12, and the assembly process is relatively simple.

[0065] The battery device 100 provided by the embodiment of the present application can be used in an electric device such as an energy storage power supply system, a vehicle, a ship or an aircraft, but is not limited thereto.

[0066] The battery device 100 mentioned in the embodiment of the present application can further comprise one or more battery cell assemblies (not shown in the figure, please refer to the combination of the plurality of battery cells 2) for providing voltage and capacity. The battery cell assembly can comprise a plurality of battery cells 2, and the plurality of battery cells 2 are connected in series, in parallel or in a mixed manner through a busbar.

[0067] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells 2; as an example, the battery cell assembly can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells 2 into an independent module. As an example, the battery module can be formed by binding a plurality of battery cells 2 with a cable tie.

[0068] In some embodiments, the battery device 100 can be a battery pack, and the battery pack comprises one or more battery cell assemblies accommodated in the interior of the battery box 1.

[0069] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the accommodation cavity 111 by fixing the battery module in the accommodation cavity 111.

[0070] As an example, the battery cell assembly can also be accommodated in the accommodation cavity 111 by directly fixing a plurality of battery cells 2 in the accommodation cavity 111.

[0071] In the embodiments of the present application, the battery cell 2 can be a secondary battery, which refers to a battery cell 2 that can be activated by charging after discharging.

[0072] The battery cell 2 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. The embodiments of the present application are not limited thereto.

[0073] In addition, the battery cell 2 can be a cylindrical battery cell 2, a prismatic battery cell 2, a soft-pack battery cell 2, or a battery cell 2 of other shapes, including a square battery cell 2, a blade battery cell 2, a multi-prismatic battery cell 2, such as a hexagonal battery cell 2, etc. The embodiments of the present application are not particularly limited.

[0074] In the following, with reference to Figures 1 to 7 The embodiments of the present application are described in detail.

[0075] With reference to Figure 2 , the present application provides a battery device 100, which includes a battery box 1 and a battery cell 2. With reference to Figure 3 , Figure 4 and Figure 5 , the battery box 1 includes a box body 11, a cover body 12, and a connecting structure 13. The cover body 12 is connected with the box body 11 to form a closed space for mounting the battery cell 2. The connecting structure 13 includes a connecting piece 131 and a connecting hole 132. The connecting hole 132 is arranged on one of the box body 11 and the cover body 12, and the first end of the connecting piece 131 is connected to the other one of the box body 11 and the cover body 12. The second end of the connecting piece 131 has a limiting portion 1311, which is located on the side of the connecting hole 132 away from the first end of the connecting piece 131, for connecting the box body 11 and the cover body 12.

[0076] The cover body 12 is connected with the box body 11, and the cover body 12 and the box body 11 can be buckled to form a closed space inside the battery box 1 for accommodating the battery cell 2. Here, the closed refers to covering or closing, which can be sealed or unsealed.

[0077] The connecting structure 13 comprises a connecting piece 131 and a connecting hole 132. The connecting piece 131 can have various structural forms, for example, the connecting piece 131 can be in a columnar structure, a plate structure or a block structure. The connecting hole 132 is used to cooperate with the connecting piece 131, and the connecting hole 132 can also have various structural forms, for example, the connecting hole 132 can be in a regular shape such as a circle, a square or the like, or can be in an irregular shape. The present embodiment does not limit the shape of the connecting hole 132.

[0078] The connecting hole 132 is arranged on one of the box body 11 and the cover body 12, and the first end of the connecting piece 131 is connected to the other of the box body 11 and the cover body 12. That is, the arrangement positions of the connecting piece 131 and the connecting hole 132 can be interchanged. For example, referring to Figure 6 and Figure 7 , the first end of the connecting piece 131 can be connected to the box body 11, and the connecting hole 132 can be arranged on the cover body 12; or the first end of the connecting piece 131 can be connected to the cover body 12, and the connecting hole 132 can be arranged on the box body 11.

[0079] The first end of the connecting piece 131 is connected to the box body 11 or the cover body 12. The connection can be an integral connection, or can be a fixed connection achieved by riveting, bonding, welding or the like.

[0080] The second end of the connecting piece 131 has a limiting portion 1311, which is located on the side of the connecting hole 132 away from the first end of the connecting piece 131, and is used to connect the box body 11 and the cover body 12. That is, the limiting portion 1311 is clamped on the side of the connecting hole 132 away from the first end of the connecting piece 131, so as to form a mechanical lock.

[0081] In the technical scheme of the embodiment of the present application, the box body 11 of the battery box 1 is connected with the cover body 12 to form an enclosed space for mounting the battery monomer 2. The connecting hole 132 of the connecting structure 13 is arranged on one of the box body 11 and the cover body 12, and the first end of the connecting piece 131 is connected to the other one of the box body 11 and the cover body 12 and fixed as an integral structure. In this way, the connecting hole 132 is arranged on one of the box body 11 and the cover body 12, and the connecting piece 131 is connected to the other one of the box body 11 and the cover body 12, so that the connecting structure 13 is arranged on the box body 11 and the cover body 12, thereby reducing the number of parts of the battery box 1 and thus reducing the material cost of the battery box 1. The second end of the connecting piece 131 has a limiting portion 1311 located on the side of the connecting hole 132 away from the first end of the connecting piece 131, so as to realize the connection between the box body 11 and the cover body 12. In this way, during assembly, the box body 11 and the cover body 12 are connected by buckling, so that the second end of the connecting piece 131 passes through the connecting hole 132, and the limiting portion 1311 of the second end of the connecting piece 131 is located on the side of the connecting hole 132 away from the first end of the connecting piece 131, so as to be matched with the hole on the corresponding side of the connecting hole 132 to prevent the connecting piece 131 from being pulled out of the connecting hole 132, thereby completing the connection between the box body 11 and the cover body 12, and the assembly process is relatively simple.

[0082] Compared with the scheme in the related art that the box body 11 and the cover body 12 are connected and fixed by bolts and nuts, in the battery box 1 provided in the embodiment of the present application, the connecting hole 132 is arranged on one of the box body 11 and the cover body 12, and the connecting piece 131 is connected to the other one of the box body 11 and the cover body 12, and the connecting piece 131 does not need to be pre-installed. Moreover, the connecting piece 131 and the connecting hole 132 are mechanically locked by the limiting portion 1311, and this step can be completed by means of automatic equipment, thereby saving the time required for manual operation in this step and improving the assembly efficiency.

[0083] In some embodiments, the connecting piece 131 can be made of a non-metal material. In this way, the generation of metal particles (particles, debris, etc.) during assembly can be reduced, thereby reducing the probability of insulation failure caused by metal particles.

[0084] In some embodiments of the present application, referring to Figure 6 , the box body 11 has an accommodating cavity 111 formed inside, the accommodating cavity 111 has an opening 112, the cover body 12 is connected to the opening 112 to form an enclosed space, and the first end of the connecting piece 131 is connected to the periphery of the opening 112.

[0085] The box body 11 has an accommodating cavity 111 inside, the cover body 12 is connected to the opening 112 of the accommodating cavity 111 to block the opening 112, an enclosed space is formed, and the battery monomer 2 can be arranged in the accommodating space.

[0086] The cover 12 can be arranged above the box body 11 or below the box body 11. In addition, a containing cavity 111 can be formed in the cover 12 to be buckled with the box body 11 to form a closed space together, or the cover 12 can be a plate structure, which is not limited by the embodiments of the application.

[0087] The first end of the connecting piece 131 is connected to the periphery of the opening 112, that is, the first end of the connecting piece 131 is connected to the peripheral region of the opening 112.

[0088] Here, the opening 112 of the box body 11 can provide a clear and stable reference surface for the installation of the cover 12. The first end of the connecting piece 131 is connected to the periphery of the opening 112 of the box body 11, so that the plane where the opening 112 is located can also be used as the reference surface of the connecting piece 131 and the connecting hole 132, which simplifies the positioning between the box body 11 and the cover 12, and further improves the assembly efficiency between the box body 11 and the cover 12.

[0089] In some embodiments of the application, the connecting structure 13 further includes a flange 133 arranged at the periphery of the opening 112 for abuttingly cooperating with the cover 12, the connecting piece 131 is fixedly connected with the box body 11 through the flange 133, the flange 133 is made of the same material as the connecting piece 131, and the flange 133 is made of a different material from the box body 11.

[0090] The flange 133 is an annular or frame-shaped raised portion extending outwardly or inwardly from the periphery of the opening 112 of the box body 11. The flange 133 can be integrally formed with the box body 11 by casting, injection molding, stamping and flanging, etc.

[0091] The box body 11 abuttingly cooperates with the cover 12 through the flange 133, that is, the surface of the cover 12 contacts the flange 133 when the box body 11 and the cover 12 are buckled. To improve the sealing effect between the box body 11 and the cover 12, a sealing ring (O-ring, rubber pad, etc.) can be placed between the flange 133 and the cover 12.

[0092] The connecting piece 131 is fixedly connected with the box body 11 through the flange 133, that is, the first end of the connecting piece 131 is connected to the flange 133.

[0093] The flange 133 is made of the same material as the connecting piece 131, and the flange 133 is made of a different material from the box body 11, that is, the flange 133 and the connecting piece 131 are made of one kind of material, and the box body 11 is made of another kind of material. For example, the flange 133 and the connecting piece 131 can be made of a composite material (such as glass fiber reinforced plastic), and the box body 11 can be made of an engineering plastic (such as PP polypropylene).

[0094] Here, the flange 133 is arranged at the opening 112 of the box body 11, which can enhance the rigidity and strength of the opening 112 to resist deformation caused by external force and internal stress. The first end of the connecting piece 131 is connected to the flange 133, so that the flange 133 and the connecting piece 131 jointly bear the core function of mechanical connection, and therefore the flange 133 and the connecting piece 131 need to have similar mechanical properties such as high strength and high rigidity. The main function of the box body 11 is to contain, protect and support the internal elements (such as the battery monomer 2), and the material selection of the box body 11 is more focused on lightweight, cost, insulation and easy processing. The flange 133 and the connecting piece 131 are designed with different materials from the box body 11, so that the flange 133 and the connecting piece 131 can select appropriate materials according to the functional needs, without sacrificing performance or cost for the pursuit of material uniformity.

[0095] Of course, in some embodiments, the materials of the flange 133, the connecting piece 131 and the box body 11 can be the same. Alternatively, the materials of the flange 133 and the box body 11 are the same, and the materials of the flange 133 and the connecting piece 131 are different.

[0096] In some embodiments of the present application, the battery box 1 comprises a first injection molded part and a second injection molded part connected together, the first injection molded part comprises the box body 11, and the second injection molded part comprises the connecting piece 131, and the hardness of the second injection molded part is greater than that of the first injection molded part.

[0097] The battery box 1 comprises a first injection molded part and a second injection molded part, the first injection molded part comprises the box body 11, and the second injection molded part comprises the connecting piece 131, which means that the box body 11 and the connecting piece 131 are formed by double-material injection molding. During injection molding, a first material can be injected into a mold to form a first injection molded part (i.e. the box body 11); then a second material is injected into another mold cavity or directly on the basis of the first part to form a second injection molded part (i.e. the connecting piece 131).

[0098] The hardness of the second injection molded part is greater than that of the first injection molded part, that is, the material hardness of the second injection molded part is higher than that of the first injection molded part.

[0099] Here, the box body 11 and the connecting piece 131 are formed by double-material injection molding, which can reduce the number of parts and assembly procedures, and improve the production efficiency. The hardness of the second injection molded part is greater than that of the first injection molded part, and the plastic with higher hardness usually has better rigidity and can withstand greater fastening force, thereby ensuring the reliability of the connection.

[0100] Of course, in some embodiments, the first injection molded part can only comprise the box body 11; or the second injection molded part can comprise the box body 11 and the flange 133.

[0101] In some embodiments of the present application, the second injection-molded part includes the connecting pieces 131 and the flanges 133, which are integrally connected.

[0102] Here, the second injection-molded part includes the connecting pieces 131 and the flanges 133, which are integrally connected, so that the second injection-molded material with higher hardness can reinforce the flanges 133 and the connecting pieces 131 into an integral load-bearing structure, thereby improving the structural reliability of the battery box 1.

[0103] In some embodiments of the present application, the connecting pieces 131 are provided in plurality, and the number of the connecting holes 132 is the same as that of the connecting pieces 131, so as to correspond to the connecting pieces 131 one by one, and the plurality of connecting pieces 131 are arranged at intervals at the periphery of the opening 112.

[0104] The plurality of connecting pieces 131 are arranged at intervals at the periphery of the opening 112, that is, along the extension direction of the periphery of the opening 112, the plurality of connecting pieces 131 are arranged at intervals.

[0105] Here, both the connecting pieces 131 and the connecting holes 132 are provided in plurality, and correspond to each other one by one, so that the connecting load between the box body 11 and the cover body 12 can be shared by the plurality of connecting pieces 131, so that each connecting piece 131 only needs to bear a small part of the force, thereby greatly reducing the risk of overload failure of a single connecting point.

[0106] In some embodiments of the present application, the limiting part 1311 is made of a plastic material, and in the case that the limiting part 1311 is subjected to a force exceeding a target threshold value, the limiting part 1311 can plastically deform.

[0107] The limiting part 1311 is made of a plastic material. This means that the material of the limiting part 1311 needs to have good plastic deformation capability, so that the limiting part 1311 will not break when subjected to a pressure exceeding its yield strength (a force exceeding a target threshold value), but will change shape. For example, the material of the limiting part 1311 can be a hot melt material, which means that the material can soften, melt or plastically deform under the action of applied heat, and after cooling, it can re-solidify to maintain the shape after deformation. Alternatively, the material of the limiting part 1311 can also be a metal, such as aluminum, mild steel, etc.

[0108] It should be noted that the above-mentioned target threshold value can be set as needed, that is, the limiting part 1311 can select a corresponding material according to the need for connection strength, so that this force can be the force acting on the limiting part 1311 during connection operation, or the maximum safe force of the connection between the box body 11 and the cover body 12.

[0109] Here, the limiting portion 1311 is made of a plastic material, and in the case where the limiting portion 1311 is subjected to a force exceeding a target threshold, the limiting portion 1311 can be plastically deformed. That is, the limiting portion 1311 at the second end of the connecting member 131 can be permanently deformed under an external force. Refer to Figure 4 , before the plastic limiting portion 1311 is deformed by a force, its size allows it to pass through the connecting hole 132 smoothly; refer to Figure 4 , after being subjected to an external force in a specific direction, the plastic limiting portion 1311 irreversibly changes shape and size, and is thus stuck on the other side of the connecting hole 132, forming a mechanical lock.

[0110] It should be noted that the limiting portion 1311 can only exist at the second end of the connecting member 131; alternatively, the connecting member 131 itself can be made of a material that has the ability to plastically deform.

[0111] In some embodiments of the present application, refer to Figure 4 and Figure 5 , the limiting portion 1311 is a rotating body, the connecting hole 132 is a circular hole, the limiting portion 1311 is coaxially arranged with the connecting hole 132, and the radial size of the limiting portion 1311 is greater than the radial size of the connecting hole 132.

[0112] The limiting portion 1311 is a rotating body, which means that the geometric shape of the limiting portion 1311 is a rotating body (also known as a solid of revolution). A rotating body is a geometric concept that refers to a three-dimensional figure formed by rotating a plane figure around a straight line in the plane (called the axis of rotation) for one revolution.

[0113] The connecting hole 132 is a circular hole, which means that the cross section of the connecting hole 132 is circular.

[0114] The limiting portion 1311 is coaxially arranged with the connecting hole 132, which means that the central axis (axis of rotation) of the limiting portion 1311 coincides with the central axis of the connecting hole 132.

[0115] Here, the limiting portion 1311 is coaxially arranged with the connecting hole 132, which can avoid unilateral scraping caused by eccentricity. The radial size of the limiting portion 1311 is greater than the radial size of the connecting hole 132, which can prevent the limiting portion 1311 from passing through the connecting hole 132, thereby improving the reliability of the connection.

[0116] In some embodiments of the present application, the limiting portion 1311 is hemispherical in shape, and the side of the connecting hole 132 away from the first end of the connecting member 131 abuts against the planar side of the limiting portion 1311.

[0117] Here, the side of the connecting hole 132 away from the first end of the connecting piece 131 is in abutting fit with the planar side of the limiting part 1311, which can realize large-area and close abutting fit between the limiting part 1311 and the hole side of the connecting hole 132, thereby improving the reliability of the connection.

[0118] In some embodiments of the present application, the limiting part 1311 is cylindrical in shape.

[0119] Here, the limiting part 1311 is cylindrical in shape, and both end faces of the cylinder are planar. In this way, one end face of the limiting part 1311 can be in abutting fit with the side of the connecting hole 132 away from the first end of the connecting piece 131, so as to increase the contact area; the other end face of the limiting part 1311 can be in contact with the support base, so as to improve the stability of the placement of the battery box 1.

[0120] Of course, in some embodiments, the limiting part can also be of other regular shapes, for example, the limiting part can be rectangular; or the limiting part can also be irregular in shape, for which the embodiments of the present application are not limited.

[0121] In some embodiments of the present application, the size of the limiting part 1311 along the extension direction of the connecting hole 132 is less than or equal to 10 mm.

[0122] The size of the limiting part along the extension direction of the connecting hole 132 is less than or equal to 10 mm, that is, the size of the connecting piece 131 protruding out of the connecting hole 132 along the extension direction of the connecting hole 132 is less than or equal to 10 mm.

[0123] Here, the size of the limiting part along the extension direction of the connecting hole 132 is less than or equal to 10 mm, so that when the plurality of battery boxes 1 are stacked, the gap between the battery boxes 1 can be very small, achieving a high stacking density, thereby improving the energy density of the energy storage device.

[0124] Reference Figure 6 In some embodiments of the present application, the connecting piece 131 is a columnar structure, and the shape of the connecting piece 131 is matched with the shape of the connecting hole 132.

[0125] The connecting piece 131 is a columnar structure, which means that the main part of the connecting piece 131 is columnar in shape. Here, the columnar shape can be cylindrical or prismatic.

[0126] The shape of the connecting piece 131 is matched with the shape of the connecting hole 132, which means that the outer contour of the connecting piece 131 is consistent with and matched with the inner contour of the connecting hole 132 in terms of geometric shape.

[0127] Here, the connecting piece 131 is in a columnar structure, and the shape of the connecting piece 131 is matched with the shape of the connecting hole 132. On the one hand, the contact area of the connecting piece 131 and the connecting hole 132 can be increased, and the uniformity of force transmission can be improved, so as to avoid stress concentration. On the other hand, the radial swing and micro-motion of the connecting piece 131 in the connecting hole 132 can be inhibited. Thus, when hot riveting is performed, the riveted joint (i.e., the limiting portion 1311) finally formed can also be prevented from being skewed, asymmetric, and having uneven strength.

[0128] The application also provides an energy storage device, which comprises the battery device 100 provided in the above embodiments.

[0129] In some embodiments, the energy storage device includes, but is not limited to, an energy storage container, an energy storage cabinet, a household energy storage device, an industrial and commercial energy storage device, an aerospace energy storage device, a toy energy storage device, etc. The household energy storage device can include a mobile power supply, a power bank, an outdoor power supply, etc. The industrial and commercial energy storage device can include a large-scale storage battery pack and an energy storage power station, etc. The aerospace energy storage device can include an auxiliary power battery of an airplane. The toy energy storage device can include a battery of an electric toy and a built-in power supply of a game machine, etc.

[0130] In the embodiment in which the energy storage device includes the energy storage container, the battery device can be accommodated in the energy storage container. The number of the battery devices in the energy storage container can be set as required, for example, the number of the battery devices in the energy storage container can be one, two or more, and the application embodiments are not limited in this regard.

[0131] Since the energy storage device includes the battery device 100 in the above embodiments, and the battery device 100 includes the battery box 1 for mounting the battery monomer 2 provided in any of the above embodiments, the same beneficial effects can be achieved, that is, the production cost of the battery box 1 can be reduced, and the assembly efficiency of the battery box 1 can be improved.

[0132] The application also provides a power consumption device 1000, which comprises the battery device 100 for providing electric energy provided in any of the above embodiments. Since the power consumption device includes the battery device 100 in any of the above embodiments, the same beneficial effects can be achieved, that is, the production cost of the battery box 1 can be reduced, and the assembly efficiency of the battery box 1 can be improved.

[0133] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently; 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 specification of the present application. In particular, 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 herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Battery cell; A battery box includes a box body, a cover, and a connecting structure. The cover is connected to the box body to form a closed space for accommodating the individual battery cells. The connecting structure includes a connector and a connecting hole. The connecting hole is disposed in one of the box body and the cover. A first end of the connector is connected to the other of the box body and the cover. A second end of the connector has a limiting portion located on the side of the connecting hole away from the first end of the connector, for connecting the box body and the cover.

2. The battery device according to claim 1, characterized in that, The box body has an internal cavity with an opening. The cover is connected to the opening to form the enclosed space. The first end of the connector is connected to the periphery of the opening.

3. The battery device according to claim 2, characterized in that, The connecting structure also includes a flange, which is disposed at the periphery of the opening for a tight fit with the cover. The connector is fixedly connected to the box body through the flange. The flange and the connector are made of the same material, while the flange and the box body are made of different materials.

4. The battery device according to claim 3, characterized in that, The battery box includes a first injection-molded part and a second injection-molded part. The first injection-molded part includes the box body, and the second injection-molded part includes a connector. The hardness of the second injection-molded part is greater than that of the first injection-molded part.

5. The battery device according to claim 4, characterized in that, The second injection-molded part includes the connector and the flange, which are integrally connected.

6. The battery device according to claim 2, characterized in that, The connector is provided in multiple ways, and the number of the connecting holes is the same as the number of the connectors, so that each connector corresponds to one of the connectors. The multiple connectors are spaced apart at the periphery of the opening.

7. The battery device according to any one of claims 1-6, characterized in that, The limiting part is made of a plastic material, and when the limiting part is subjected to a force exceeding the target threshold, the limiting part can undergo plastic deformation.

8. The battery device according to any one of claims 1-6, characterized in that, The limiting part is a rotating body, the connecting hole is a circular hole, the limiting part and the connecting hole are coaxially arranged, and the radial dimension of the limiting part is greater than the radial dimension of the connecting hole.

9. The battery device according to claim 8, characterized in that, The limiting part is hemispherical in shape, and the side of the connecting hole away from the first end of the connector abuts against the planar side of the limiting part.

10. The battery device according to claim 8, characterized in that, The limiting part is cylindrical in shape.

11. The battery device according to any one of claims 1-6, characterized in that, Along the extending direction of the connecting hole, the size of the limiting part is less than or equal to 10 mm.

12. The battery device according to any one of claims 1-6, characterized in that, The connector is a columnar structure, and the shape of the connector matches the shape of the connecting hole.

13. An energy storage device, characterized in that, include: The battery device according to any one of claims 1-12, wherein the battery device is installed in the energy storage device.

14. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1-12 for providing electrical energy.

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