Battery device, energy storage device and power utilization device

Abstract

The utility model relates to the technical field of battery devices, and provides a battery device, an energy storage device and a power utilization device.The battery device comprises a lower box body and an upper cover, and the upper cover comprises an upper cover body and a flange arranged at the circumferential edge of the upper cover body; a plurality of connecting holes are formed in the flange, and the flange is connected to the lower box body through the connecting holes in cooperation with fasteners; the flange is provided with a first surface facing the lower box body, and the first surface forms at least one convex structure between two adjacent connecting holes; according to the battery device provided by the embodiment of the invention, when the flange is connected and locked to the lower box body through the connecting holes and matched with the fasteners, the extrusion force between the first surface between the two connecting holes and the lower box body can be larger through the convex structures, so that the first surface is more tightly attached to the lower box body through the convex structures; and therefore, the sealing performance in the battery device can be effectively improved, and the stability of the battery device is improved.

Description

Technical Field

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

[0002] With the development and progress of society, power batteries have rapidly entered people's field of vision as a new energy source and have been widely used in various fields.

[0003] The battery device includes a lower box, an upper cover, and a battery cell contained in the lower box and the upper cover. The upper cover has a flange for connecting with the lower box; when the flange is fastened to the lower box using bolts, the flange between two adjacent bolts does not exert sufficient pressure on the lower box, thereby affecting the sealing performance between the upper cover and the lower box. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a battery device, an energy storage device and an electrical device, aiming to solve the problem of poor partial sealing performance between two adjacent bolts used to achieve locking during the connection process of the upper cover and the lower box of the battery device.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is:

[0006] In the first aspect, an embodiment of the present application provides a battery device, including a lower box body and an upper cover, the upper cover including an upper cover body and a flange arranged at the circumferential edge of the upper cover body; a plurality of connecting holes are opened on the flange, and the flange is connected to the lower box body through the connecting holes and matching fasteners; the flange has a first surface facing the lower box body, and the first surface has at least one convex structure formed between two adjacent connecting holes.

[0007] Beneficial effects of the embodiments of the present application: The battery device provided by the embodiments of the present application has at least one convex structure formed between two adjacent connecting holes on the first surface. When the flange is connected and locked to the lower box body through the connecting hole and cooperates with the fasteners, the first surface located between the two connecting holes can have a greater extrusion force with the lower box body through the convex structure, so that the first surface fits more closely with the lower box body through the convex structure, thereby effectively improving the sealing performance inside the battery device to improve the stability of the battery device.

[0008] In some embodiments, the outer convex structure is an arc-shaped convex portion, and the arc-shaped convex portion is arranged in the middle of the line connecting two adjacent connecting holes.

[0009] By adopting the above-mentioned technical solution, when two adjacent connecting holes are locked and connected by means of fasteners, the flange in the middle part between the two adjacent connecting holes is more arched away from the lower box body. By arranging the arc-shaped protrusion in the middle part between the two adjacent connecting holes, the arc-shaped protrusion can be utilized to effectively increase the extrusion force between the flange and the lower box body, thereby effectively improving the sealing performance of the battery device.

[0010] In some embodiments, the upper cover further includes a reinforcement member, and the flange is connected with the reinforcement member between two adjacent connection holes.

[0011] By adopting the above technical solution, a reinforcement piece is connected between two adjacent connection holes of the flange, and the reinforcement piece is used to improve the structural strength of the flange, so as to reduce the probability of flange damage.

[0012] In some embodiments, in the thickness direction of the flange, the projection of the reinforcement member and the projection of the convex structure at least partially overlap.

[0013] By adopting the above technical solution, when the first surface and the lower box body are locked and flattened, the reinforcement can generate a larger tensile strain, so that the first surface generates a larger downward pressure on the lower box body, thereby further improving the sealing of the battery device.

[0014] In some embodiments, at least a portion of the reinforcement member is embedded in the flange.

[0015] By adopting the above technical solution and embedding at least a portion of the reinforcement member in the flange, the probability of the reinforcement member protruding outside the flange and thus affecting transportation and possibly causing accumulation of muddy water is reduced.

[0016] In some embodiments, the flange has a second surface facing away from the lower box body, and the second surface is a plane; and the surface of the reinforcement member is flush with the second surface.

[0017] By adopting the above technical solution, the reinforcement is embedded in the flange and the surface of the reinforcement is made flush with the second surface to improve the flatness of the second surface and further reduce the impact of the reinforcement on transportation and the probability of muddy water accumulation.

[0018] In some embodiments, the flange has a second surface facing away from the lower box body, the second surface is recessed inward to form at least one concave structure, and the reinforcement member is disposed at the concave structure.

[0019] By adopting the above-mentioned technical solution, an outward convex structure is provided on the first surface, and the second surface can be recessed inward to form at least one inward concave structure. The outward convex structure provided on the first surface can improve the sealing performance of the battery device, and the inward concave structure provided on the second surface can reduce the thickness of the flange to save materials and reduce weight; and the reinforcement is located at the inward concave structure, and the reinforcement can structurally strengthen the flange portion thinned by the inward concave structure.

[0020] In some embodiments, the reinforcement member includes a continuous fiber composite sheet connected to the flange.

[0021] By adopting the above-mentioned technical solution, the continuous fiber composite plate is connected to the flange and the structural strength of the flange is strengthened. When the fastener passes through the connecting hole and is locked to the lower box body, the continuous fiber composite plate can produce a larger tensile strain, so that the flange forms a greater downward pressure on the lower box body, so as to further improve the sealing of the battery device.

[0022] In a second aspect, an embodiment of the present application provides an energy storage device, including a battery device as described above, and the battery device is used to store or provide electrical energy.

[0023] Beneficial effects of the embodiments of the present application: The energy storage device provided in the embodiments of the present application includes the above-mentioned battery device. On the basis that the above-mentioned battery device has better sealing performance, the sealing performance of the energy storage device is better.

[0024] In a third aspect, an embodiment of the present application provides an electrical device, including a battery device as described above or an energy storage device as described above, wherein the battery device is used to store or provide electrical energy.

[0025] Beneficial effects of the embodiments of the present application: The electrical device provided in the embodiments of the present application includes the above-mentioned battery device or energy storage device, thereby improving the stability of the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0028] Figure 2 An exploded view of a battery device provided in some embodiments of the present application;

[0029] Figure 3 A schematic diagram of the structure of the upper cover provided in some embodiments of the present application;

[0030] Figure 4 for Figure 3 A local enlarged schematic diagram of point A;

[0031] Figure 5 A cross-sectional view of a flange provided for some embodiments of the present application;

[0032] Figure 6 Cross-sectional views of flanges provided in some other embodiments of the present application.

[0033] Among them, the reference numerals in the figure are:

[0034] 1000. Vehicles;

[0035] 100, battery device; 200, controller; 300, motor;

[0036] 10. Box body; 20. Battery cell;

[0037] 11. Upper cover; 111. Upper cover body; 112. Flange; 1121. Connecting hole; 1122. Outer convex structure; 1123. Inner concave structure; 112a. First surface; 112b. Second surface; 113. Reinforcement member;

[0038] 12. Lower box; H. thickness direction. DETAILED DESCRIPTION

[0039] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0040] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0044] The battery device includes a lower box, an upper cover, and a battery cell contained in the lower box and the upper cover. The upper cover has a flange for connecting with the lower box; when the flange is fastened to the lower box using bolts, the flange between two adjacent bolts does not exert sufficient pressure on the lower box, thereby affecting the sealing performance between the upper cover and the lower box.

[0045] Based on the above considerations, in order to solve the problem of poor partial sealing performance between two adjacent bolts used to lock the flange and the lower case during the connection process of the upper cover and the lower case of the battery device, a battery device is designed, by providing an outward protrusion structure on the first surface of the flange facing the lower case, and the outward protrusion structure is formed between two adjacent connecting holes. Therefore, when the flange and the lower case are locked and connected through the connecting holes by using fasteners, the first surface located between the two connecting holes can have a greater extrusion force with the lower case through the outward protrusion structure, so that the first surface fits more closely with the lower case through the outward protrusion structure, thereby effectively improving the sealing performance inside the battery device, so as to improve the stability of the battery device.

[0046] The battery device disclosed in the embodiments of the present application can be applied to electrical equipment as a power source or applied to various energy storage devices and energy storage systems as an energy storage element. Electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0047] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0048] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0049] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0050] Please refer to Figure 2 , Figure 2 An exploded view of a battery device 100 provided in some embodiments of the present application. The battery device 100 (Battery Apparatus) mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) may include a plurality of battery cells 20, and the plurality of battery cells 20 are connected in series, in parallel, or in mixed connection through a busbar component.

[0051] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells 20 .

[0052] As an example, the battery cell assembly may be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells 20 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 20 by a cable tie.

[0053] In some embodiments, the battery device may be a battery pack, which includes a case 10 and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case 10 .

[0054] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body 10 by fixing the battery module in the box body 10 .

[0055] As an example, the battery cell assembly may also be accommodated in the case 10 by directly fixing the plurality of battery cells 20 to the case 10 .

[0056] As an example, the box body 10 may include an upper cover 11 and a lower box body 12. The upper cover 11 and the lower box body 12 are buckled together to form a closed space inside the box body 10 to accommodate the battery monomer assembly. The closed space here means covering or closing, which can be sealed or unsealed.

[0057] In some embodiments, the box 10 can be used as a part of the chassis structure of the vehicle 1000. For example, part of the box 10 can become at least a part of the floor of the vehicle 1000, or part of the box 10 can become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0058] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells 20, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0059] In the embodiment of the present application, the battery cell 20 may be a secondary battery. A secondary battery refers to a battery cell 20 that can be continuously used by activating active materials by charging after the battery cell 20 is discharged.

[0060] According to some embodiments of the present application, referring to Figures 2 to 4The embodiment of the present application provides a battery device 100, including a lower box body 12 and an upper cover 11, the upper cover 11 includes an upper cover body 111 and a flange 112 arranged at the circumferential edge of the upper cover body 111; a plurality of connecting holes 1121 are opened on the flange 112, and the flange 112 is connected to the lower box body 12 through the connecting holes 1121 and in cooperation with fasteners (not shown in the figure); the flange 112 has a first surface 112a facing the lower box body 12, and the first surface 112a has at least one convex structure 1122 formed between two adjacent connecting holes 1121.

[0061] Among them, the upper cover body 111 is a rigid structure, which covers the lower box body 12 to define a storage space for accommodating the battery cell 20. The lower box body 12 is usually a hollow structure with one end open, and the upper cover 11 can be roughly a plate-like structure, or a hollow structure with one side open. Of course, the upper cover 11 can be in a variety of shapes, such as but not limited to circular, triangular, rectangular and other polygonal structures. The material for preparing the upper cover 11 is not too limited here. For example, the upper cover 11 can be but not limited to an injection molding structure, a metal structure, a composite structure, etc.

[0062] The upper cover body 111 is provided with a flange 112 on the circumferential edge thereof, and the flange 112 is used to connect and cover the opening side of the lower box body 12. The flange 112 is formed by extending outward from the circumferential edge of the upper cover body 111, so that the flange 112 will not compress the accommodation space inside the lower box body 12 when it is locked and connected with the lower box body 12 by fasteners.

[0063] Exemplarily, the opening side of the lower box body 12 facing the upper cover body 111 may also be provided with a mating structure corresponding to the flange 112, and the upper cover body 111 may cover the opening side of the lower box body 12 so that the flange 112 abuts against the mating structure of the lower box body 12; and then fasteners (such as bolts, screws, etc.) are used to penetrate the connecting holes 1121 of the flange 112 and the corresponding holes of the mating structure to achieve a locking connection.

[0064] Optionally, in some embodiments, a sealing structure, such as a sealing gasket, a sealing rubber ring, etc., can be provided between the lower box body 12 and the flange 112 of the upper cover 11, and the flange 112 and the lower box body 12 can be locked and connected by fasteners so that the flange 112 and the lower box body 12 clamp the sealing structure to improve the sealing performance between the upper cover 11 and the lower box body 12.

[0065] The flange 112 has a first surface 112a, which faces the lower box body 12. Therefore, when the flange 112 and the lower box body 12 are locked and connected by fasteners, the first surface 112a of the flange 112 can abut against the lower box body 12 and squeeze and seal.

[0066] The first surface 112a is formed with an outer convex structure 1122 between two adjacent connection holes 1121; wherein, the outer convex structure 1122 may be formed between at least two adjacent connection holes 1121, or, the outer convex structure 1122 may be formed between any two adjacent connection holes 1121. Optionally, the outer convex structure 1122 may be integrally formed on the flange 112, for example, by injection molding; or, the outer convex structure 1122 may be fixedly connected to the first surface 112a of the flange 112 by melting connection, bonding, clamping, etc.

[0067] The convex structure 1122 may be a convex point, an arc-shaped protrusion, a conical protrusion, a prismatic protrusion, etc. formed on the first surface 112a. In some embodiments, between any two adjacent connection holes 1121, the number of the convex structure 1122 may be one, and this one convex structure 1122 may be arranged close to one of the two adjacent connection holes 1121, or may be arranged in the middle of the two adjacent connection holes 1121; the convex structure 1122 may completely cover the first surface 112a between the two adjacent connection holes 1121, or the convex structure 1122 may also cover part of the first surface 112a between the two adjacent connection holes 1121. Alternatively, in other embodiments, between any two adjacent connection holes 1121, the number of the convex structure 1122 may be multiple, for example, two, three or more than three, and the multiple convex structures 1122 are sequentially arranged between the two adjacent connection holes 1121 along the arrangement direction of the connection holes 1121.

[0068] It should be understood that when the flange 112 and the lower box body 12 are locked and connected by fasteners through the connection holes 1121, a strong extrusion force will be formed between the flange 112 and the lower box body 12 at the connection points where the fasteners are locked, so that the flange 112 and the lower box body 12 have a better sealing effect at the connection points where the fasteners are locked. However, in the part between two adjacent connection points where the fasteners are locked, the extrusion force between the flange 112 and the lower box body 12 is relatively weak because it is not directly locked by the fasteners; therefore, the sealing performance inside the upper cover 11 and the lower box body 12 may be affected here.

[0069] The battery device 100 provided in the embodiment of the present application has at least one convex structure 1122 formed between two adjacent connection holes 1121 on the first surface 112a. When the flange 112 passes through the connection hole 1121 and is connected and locked to the lower box body 12 with a fastener, the first surface 112a located between the two connection holes 1121 can have a greater extrusion force between the convex structure 1122 and the lower box body 12, so that the first surface 112a is more closely fitted to the lower box body 12 through the convex structure 1122, thereby effectively improving the sealing performance inside the battery device 100 to improve the stability of the battery device 100.

[0070] Please refer to Figures 3 to 5 In some embodiments, the outer convex structure 1122 is an arc-shaped convex portion, and the arc-shaped convex portion is arranged in the middle of the line connecting two adjacent connection holes 1121.

[0071] The number of the arc-shaped convex portion may be one, and the arc-shaped convex portion may be arranged in the middle between two adjacent connection holes 1121, and the point where the arc-shaped convex portion is most convex is located at the center between two adjacent connection holes 1121. Alternatively, the number of the arc-shaped convex portions may be two or more, and a plurality of arc-shaped convex portions may be arranged in sequence in the middle between two adjacent connection holes 1121.

[0072] It can be understood that since the convex structure 1122 is an arc-shaped convex portion, the surface of the arc-shaped convex portion is an arc surface, and the arc-shaped convex portion gradually decreases from the point where the convexity is the largest to the connecting holes 1121 at both ends; therefore, when the flange 112 and the lower box body 12 are locked and connected, the arc-shaped convex portion can form a larger extrusion pressure on the lower box body 12 at the point where the convexity is the largest, and at the same time, the part of the arc-shaped convex portion extending toward the connecting holes 1121 at both ends can also synchronously form a certain extrusion pressure on the lower box body 12, so as to effectively improve the sealing performance between the flange 112 part between two adjacent connecting holes 1121 and the lower box body 12.

[0073] At the same time, it can be understood that the squeezing force between the flange 112 and the lower box body 12 will gradually weaken as it moves away from the locking position of the fastener; therefore, the squeezing force between the flange 112 and the lower box body 12 is weaker at the middle position between two adjacent connection holes 1121. By arranging the arc-shaped convex portion in the middle of the line connecting the two adjacent connection holes 1121, that is, the midpoint of the center line connecting the two adjacent connection holes 1121, the squeezing force between the flange 112 and the lower box body 12 at the middle position between the two adjacent connection holes 1121 can be effectively increased, so as to effectively improve the sealing performance of the flange 112 and the lower box body 12 between the two adjacent connection holes 1121.

[0074] With such arrangement, when two adjacent connection holes 1121 are locked and connected with fasteners, the portion of the flange 112 in the middle between the two adjacent connection holes 1121 is more arched away from the lower box body 12. By arranging the arc-shaped convex portion in the middle between the two adjacent connection holes 1121, the arc-shaped convex portion can be utilized to effectively increase the squeezing force between the lower box body 12, thereby effectively improving the sealing performance of the battery device 100.

[0075] Please refer to Figures 3 to 5 In some embodiments, the upper cover 11 further includes a reinforcement member 113 , and the flange 112 is connected with the reinforcement member 113 between two adjacent connection holes 1121 .

[0076] The reinforcement member 113 is used to improve the connection strength of the flange 112. Optionally, the reinforcement member 113 includes but is not limited to a plastic reinforcement structure, a metal reinforcement structure, a composite reinforcement structure, etc. The reinforcement member 113 can be a reinforcement plate, a reinforcement rib, a reinforcement block, a reinforcement strip, and other configurations.

[0077] The reinforcement 113 may be fixed to the second surface 112 b of the flange 112 by injection molding, bonding, fusion connection, etc.; or, the reinforcement 113 may be at least partially disposed inside the flange 112 by injection molding, bonding, fusion connection, etc.

[0078] For example, in some embodiments, the reinforcement member 113 may be a reinforcement structure with high rigidity such as a steel plate or a composite plate, and the reinforcement member 113 may be bonded and fixed to the second surface 112b of the flange 112. Alternatively, in other embodiments, the reinforcement member 113 and the flange 112 may be integrally formed by injection molding, by placing the reinforcement member 113 in an injection mold for forming the flange 112, and using the injection mold to injection mold the flange 112, so that the reinforcement member 113 can be formed inside the flange 112.

[0079] In this configuration, by connecting the reinforcement member 113 between two adjacent connection holes 1121 of the flange 112, the reinforcement member 113 is used to improve the structural strength of the flange 112 to reduce the probability of damage to the flange 112; at the same time, the wall thickness of the flange 112 can also be reduced.

[0080] Please refer to Figures 4 to 6 In some embodiments, in the thickness direction H of the flange 112 , the projection of the reinforcement member 113 and the projection of the convex structure 1122 at least partially overlap.

[0081] The thickness direction H of the flange 112 may be parallel to the axial direction of the connection hole 1121 , that is, the connection hole 1121 may be opened along the thickness direction H of the flange 112 .

[0082] In the thickness direction H of the flange 112, the projection of the reinforcement 113 may include the projection of the convex structure 1122; or, in the thickness direction H of the flange 112, the projection of the convex structure 1122 may include the projection of the reinforcement 113; or, in the thickness direction H of the flange 112, the projection of the reinforcement 113 and the projection of the convex structure 1122 may completely overlap; or, in the thickness direction H of the flange 112, the projection of the reinforcement 113 partially overlaps with the projection of the convex structure 1122.

[0083] In this configuration, when the first surface 112 a and the lower case 12 are locked and flattened, the reinforcement 113 can generate a larger tensile strain due to deformation, so that the first surface 112 a generates a larger downward pressure on the lower case 12 to further improve the sealing of the battery device 100 .

[0084] Please refer to Figures 3 to 5 In some embodiments, at least a portion of the reinforcement member 113 is embedded in the flange 112 .

[0085] At least part of the reinforcement 113 is embedded in the flange 112; optionally, the reinforcement 113 may be partially embedded in the flange 112 and partially exposed from the flange 112 on the second surface 112b side. Alternatively, the reinforcement 113 may be completely embedded in the flange 112.

[0086] For example, in some embodiments, a mounting groove may be provided on the second surface 112b of the flange 112, and the reinforcement member 113 may be fixedly installed in the mounting groove by bonding, melting connection, etc., and the reinforcement member 113 may extend out of the second surface 112b, or be flush with the second surface 112b. In other embodiments, the reinforcement member 113 and the flange 112 may be integrally formed by injection molding, by placing the reinforcement member 113 in an injection mold for forming the flange 112, and placing the reinforcement member 113 at a position corresponding to the second surface 112b of the flange 112, and using the injection mold to injection mold the flange 112, so that the reinforcement member 113 can be formed inside the flange 112, and the reinforcement member 113 can be flush with the second surface 112b.

[0087] With such a configuration, by partially embedding the reinforcement 113 in the flange 112, or completely embedding the reinforcement 113 in the flange 112, the probability of the reinforcement 113 protruding outward from the flange 112 and thus affecting transportation and possibly causing accumulation of mud and water is reduced.

[0088] Please refer to Figures 3 to 5 In some embodiments, the flange 112 has a second surface 112 b facing away from the lower box body 12 , and the second surface 112 b is a plane; the surface of the reinforcement member 113 is flush with the second surface 112 b .

[0089] It can be understood that the second surface 112 b is the other side surface of the flange 112 relative to the first surface 112 a ; the first surface 112 a and the second surface 112 b are the opposite side surfaces of the flange 112 in the thickness direction H thereof.

[0090] By setting the second surface 112b as a plane, the second surface 112b has better flatness when the battery device 100 is in working state, so that during the movement or transportation of the battery device 100, the probability of the second surface 112b interfering with the external structure is lower, and the probability of the flange 112 causing collision is lower.

[0091] In this way, the reinforcement member 113 is embedded in the flange 112 and the surface of the reinforcement member 113 is flush with the second surface 112b, so as to improve the flatness of the second surface 112b and further reduce the influence of the reinforcement member 113 on transportation and the probability of muddy water accumulation.

[0092] Please refer to Figure 2 and Figure 6 In some embodiments, the flange 112 has a second surface 112 b facing away from the lower box body 12 , the second surface 112 b is recessed inward to form at least one concave structure 1123 , and the reinforcement member 113 is disposed at the concave structure 1123 .

[0093] The concave structure 1123 may be formed in the second surface 112b portion between two adjacent connection holes 1121. One or more concave structures 1123 may be formed between at least two adjacent connection holes 1121; or, one or more concave structures 1123 may be formed between any two adjacent connection holes 1121. Exemplarily, in some embodiments, the concave structure 1123 may be arranged to correspond to the convex structure 1122, that is, in the thickness direction H of the flange 112, the projection of the concave structure 1123 and the projection of the convex structure 1122 at least partially overlap, for example, may completely overlap.

[0094] Optionally, the concave structure 1123 can be an arc-shaped groove, a rectangular groove, etc. formed on the second surface 112b; in this case, the reinforcement 113 can be embedded in the groove, for example, completely embedded in the interior of the groove, or flush with the notch end of the groove, or protruding out of the groove.

[0095] Alternatively, the concave structure 1123 may be a surface formed by the second surface 112b being concave inward as a whole; in this case, the reinforcement 113 may be directly fixed on the second surface 112b and located in the pit of the concave structure 1123, or embedded inwardly in the interior of the flange 112 at the concave structure 1123.

[0096] For example, in some embodiments, between any two adjacent connection holes 1121, the second surface 112b may be recessed to form an inner concave structure 1123 in the form of an arc-shaped groove, and at the same time, the first surface 112a may be integrally formed with an outer convex structure 1122 in the form of an arc-shaped convex portion; the recess degree of the inner concave structure 1123 is substantially the same as the outer convex degree of the outer convex structure 1122, that is, the surface of the inner concave structure 1123 is substantially parallel to the surface of the outer convex structure 1122. Thus, the portion of the flange 112 between the two adjacent connection holes 1121 is in a structure that is offset as a whole toward the lower housing 12; specifically, Figure 6 shown.

[0097] In this way, by setting an outward convex structure 1122 on the first surface 112a, and the second surface 112b can be recessed inward to form at least one inward concave structure 1123, the inward concave structure 1123 set on the second surface 112b can reduce the thickness of the flange 112 to save materials and reduce weight; at the same time, because the first surface 112a and the lower box body 12 are locked and flattened, the reinforcement 113 can produce a larger tensile strain due to deformation, so that a smaller wall thickness can also generate sufficient downward force.

[0098] Please refer to Figures 3 to 5 In some embodiments, the reinforcement member 113 includes a continuous fiber composite plate connected to the flange 112 .

[0099] Continuous fiber composites are high-performance composite materials that consist of continuous reinforcing fibers (such as carbon fibers, glass fibers or aramid fibers) embedded in a matrix material (usually a resin).

[0100] In this configuration, the continuous fiber composite board is connected to the flange 112 and the structural strength of the flange 112 is strengthened. When the fastener passes through the connecting hole 1121 and is locked to the lower box body 12, the continuous fiber composite board can produce a larger tensile strain, so that the flange 112 forms a larger downward pressure on the lower box body 12, so as to further improve the sealing of the battery device 100.

[0101] Next, the battery device 100 provided in the embodiment of the present application will be further described according to specific test methods.

[0102] Please refer to Figures 2 to 5In this embodiment, the battery device 100 includes a lower box body 12 and an upper cover 11. The upper cover 11 includes an upper cover body 111 and a flange 112 disposed at the circumferential edge of the upper cover body 111; the flange 112 is provided with a plurality of connection holes 1121, and the flange 112 is connected to the lower box body 12 through the connection holes 1121 and in cooperation with fasteners. The flange 112 has a first surface 112a facing the lower box body 12, and a second surface 112b facing away from the lower box body 12 and opposite to the first surface 112a; the first surface 112a forms an outer convex structure 1122 in the form of an arc-shaped convex portion between any two adjacent connection holes 1121. The upper cover 11 also includes a reinforcement 113, which can be made of a continuous fiber composite plate. The flange 112 is respectively connected with a continuous fiber composite plate between any two adjacent connection holes 1121; the continuous fiber composite plate can be integrally formed inside the flange 112 by injection molding, and the surface of the continuous fiber composite plate is exposed to the flange 112 at the second surface 112b; the surface of the continuous fiber composite plate is flush with the second surface 112b of the flange 112.

[0103] Please refer to Figure 2 In a second aspect, an embodiment of the present application provides an energy storage device (not shown in the figure), including a battery device 100 as described above, and the battery device 100 is used to store or provide electrical energy.

[0104] The embodiment of the present application provides an energy storage device, including one or more battery clusters (Battery Cluster) to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices 100, and the multiple battery devices 100 are connected in series through a busbar component to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0105] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during low power consumption and provide electrical energy to relevant users or electrical equipment during peak power consumption. The energy storage system provided in the embodiment of the present application can be any power system that requires the use of an energy storage device.

[0106] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0107] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters, wherein the battery clusters are housed in the cabinet.

[0108] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module, a power distribution module, and a fire protection module.

[0109] As an example, the thermal management module may include a liquid cooling unit that provides cooling liquid for adjusting the temperature of the battery cells 20 to each battery device 100 through a pipeline.

[0110] As an example, the main control module can be used as a battery management unit of a battery cluster to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The main control module includes a slave battery management unit SBMU (Slave Battery Management Unit, SBMU), a fusion switch and other modules.

[0111] As an example, the master control module can be used as a battery management unit of an energy storage device to monitor and manage the energy storage device. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device. For example, the charging and discharging current, voltage, etc. of the energy storage device can be controlled. As an example, the master control module includes an insulation monitoring module IMM (Insulation Monitoring Module, abbreviated as IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), Ethernet ETH (EtherNet, ETH) and a fiber optic conversion module.

[0112] As an example, the fire protection module includes a control panel, a detector, an alarm device, etc., which are used to detect, alarm or extinguish fire in the energy storage system.

[0113] As an example, the power distribution module can be used to distribute power to modules in the energy storage device that require power.

[0114] The energy storage device provided in the embodiment of the present application includes the above-mentioned battery device 100. On the basis that the above-mentioned battery device 100 has better sealing performance, the sealing performance of the energy storage device is better.

[0115] Please refer to Figure 1 and Figure 2 In a third aspect, an embodiment of the present application provides an electrical device, including a battery device 100 as described above, an energy storage device as described above, or an energy storage system as described above, wherein the battery device 100 is used to store or provide electrical energy.

[0116] The electric device provided in the embodiment of the present application is, for example, the above-mentioned vehicle 1000; the electric device includes the above-mentioned battery device 100 or energy storage device, thereby, the stability of the electric device is better.

[0117] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include lower box; as well as The upper cover comprises an upper cover body and a flange arranged at the circumferential edge of the upper cover body; a plurality of connecting holes are opened on the flange, and the flange is connected to the lower box body through the connecting holes and in cooperation with fasteners; the flange has a first surface facing the lower box body, and the first surface forms at least one convex structure between two adjacent connecting holes.

2. The battery device according to claim 1, characterized in that: The outer convex structure is an arc-shaped convex portion, and the arc-shaped convex portion is arranged in the middle of the line connecting two adjacent connecting holes.

3. The battery device according to claim 1 or 2, characterized in that: The upper cover also includes a reinforcement member, and the flange is connected to the reinforcement member between two adjacent connection holes.

4. The battery device according to claim 3, characterized in that: In the thickness direction of the flange, the projection of the reinforcement member and the projection of the convex structure at least partially overlap.

5. The battery device according to claim 4, characterized in that: At least a portion of the reinforcement is embedded in the flange.

6. The battery device according to claim 5, characterized in that: The flange has a second surface facing away from the lower box body, and the second surface is a plane; the surface of the reinforcement is flush with the second surface.

7. The battery device according to claim 4 or 5, characterized in that: The flange has a second surface facing away from the lower box body, the second surface is inwardly recessed to form at least one concave structure, and the reinforcement is arranged at the concave structure.

8. The battery device according to claim 4, characterized in that: The reinforcement member includes a continuous fiber composite plate connected to the flange.

9. An energy storage device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 8, wherein the battery device is used to store or provide electrical energy.

10. An electrical device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 8 or an energy storage device as claimed in claim 9, wherein the battery device is used to store or provide electrical energy.

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