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, the upper cover comprises a frame and a top plate, and the top plate is provided with a connecting hole; the frame comprises a frame main body and an inserting part, the frame main body is arranged on the periphery of the top plate in a surrounding mode and connected to the top plate, the frame main body is connected to the lower box body and the top plate, and the inserting part is fixed to the frame main body and inserted into the connecting hole; according to the battery device provided by the embodiment of the invention, the connecting hole is formed in the top plate, the frame main body is connected to the top plate, and the inserting part fixed on the frame main body also penetrates through the connecting hole, so that the inserting part can play a role in limiting the top plate, and meanwhile, the inserting part can also improve the connecting strength with the top plate; therefore, the connection strength of the frame and the top plate is effectively enhanced, and the structural strength of the upper cover is effectively 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 and an upper cover; the upper cover includes a frame and a top plate connected to the surface of the frame. However, the current connection method and connection structure of the two are relatively simple, and the strength of the joint between the top plate and the frame is low, resulting in a low overall structural strength of the upper cover. 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 low structural strength of the upper cover of the battery device in the related art.

[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 and an upper cover, the upper cover including a frame and a top plate, the top plate being provided with a connecting hole; the frame including a frame body and a plug-in portion, the frame body surrounding the periphery of the top plate and connected to the top plate, the frame body connected to the lower box, the plug-in portion fixed on the frame body, and the plug-in portion inserted into the connecting hole.

[0007] Beneficial effects of the embodiments of the present application: The battery device provided in the embodiments of the present application, by opening a connection hole on the top plate, while the frame body is connected to the top plate, the plug-in part fixed on the frame body is also inserted into the connection hole, thereby, the plug-in part can limit the top plate, and at the same time, the plug-in part can also improve the connection strength with the top plate, so that the connection strength between the frame and the top plate can be effectively strengthened, and then the structural strength of the upper cover can be effectively improved.

[0008] In some embodiments, a first connection portion is extended from the frame body, and the first connection portion is connected to one side of the top plate along the thickness direction.

[0009] By adopting the above technical solution, the first connecting portion can be connected to the top plate in the thickness direction of the top plate to improve the connection strength between the top plate and the frame.

[0010] In some embodiments, the frame body extends to form a second connection portion, and the second connection portion is connected to the other side of the top plate in the thickness direction so that a portion of the top plate is located between the first connection portion and the second connection portion.

[0011] By adopting the above-mentioned technical solution, the first connecting part and the second connecting part can be connected to the top plate at opposite sides of the top plate respectively. As a result, the frame body can limit the support and strengthen the connection of the top plate through the first connecting part and the second connecting part, so as to further improve the connection strength between the top plate and the frame, and then the structural strength of the upper cover can be further strengthened.

[0012] In some embodiments, in the thickness direction of the top plate, the projection of the connecting hole is within the projection range of the first connecting portion, and the plug-in portion is connected to the first connecting portion.

[0013] By adopting the above technical solution, when the top plate is connected to the first connecting portion, the plug-in portion connected to the first connecting portion can be inserted into the connecting hole, thereby effectively improving the connection strength between the top plate and the frame.

[0014] In some embodiments, in the thickness direction of the top plate, the projection of the connection hole is within the projection range of the second connection portion, and opposite ends of the plug-in portion are respectively connected to the first connection portion and the second connection portion.

[0015] By adopting the above technical solution, when the top plate is connected between the first connection part and the second connection part, the plug-in part inserted into the connection hole is simultaneously connected to the first connection part and the second connection part, thereby increasing the connection strength between the top plate and the frame.

[0016] In some embodiments, a receiving groove is provided on at least one side of the top plate in the thickness direction, and a connecting hole is provided on the bottom wall of the receiving groove; the first connecting portion is accommodated in the receiving groove on one side, and the surface of the first connecting portion is flush with the surface of the top plate on the same side; and / or the second connecting portion is accommodated in the receiving groove on the other side, and the surface of the second connecting portion is flush with the surface of the top plate on the same side.

[0017] By adopting the above technical solution, the top plate can be flush with the surface of the first connecting part and / or the surface of the second connecting part, so as to improve the flatness of the top plate and the frame.

[0018] In some embodiments, in the thickness direction of the top plate, the projection of the connecting hole is outside the projection range of the second connecting portion.

[0019] By adopting the above technical solution, when the top plate is arranged between the first connecting part and the second connecting part, the plug-in part inserted into the connecting hole can be connected only to the first connecting part.

[0020] In some embodiments, the frame further includes a limiting portion, which is connected to the plug-in portion; in the thickness direction of the top plate, the limiting portion and the first connecting portion respectively abut against opposite side surfaces of the top plate.

[0021] By adopting the above technical solution, the limiting portion and the first connecting portion are respectively abutted against the two opposite side surfaces of the top plate in the thickness direction, so that the connection strength between the frame and the top plate can be effectively improved.

[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. Based on the better strength of the upper cover structure of the above-mentioned battery device, the stability 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 A schematic diagram of the structure of a top plate provided in some embodiments of the present application;

[0031] Figure 5 A cross-sectional view of an upper cover provided for some embodiments of the present application;

[0032] Figure 6 for Figure 5 A local enlarged schematic diagram of point A;

[0033] Figure 7 A cross-sectional view of an upper cover provided for some other embodiments of the present application;

[0034] Figure 8 for Figure 7 A local enlarged schematic diagram of point B;

[0035] Fig. 9 A schematic diagram of a partial connection structure of another frame and a top plate provided in some embodiments of the present application;

[0036] Fig.10 A schematic diagram of a partial connection structure between another frame and a top plate provided in some embodiments of the present application.

[0037] Among them, the reference numerals in the figure are:

[0038] 1000. Vehicles;

[0039] 100, battery device; 200, controller; 300, motor;

[0040] 10. Box body; 20. Battery cell;

[0041] 11. upper cover; 111. frame; 1111. frame body; 1112. plug-in portion; 1113. first connecting portion; 1114. second connecting portion; 1115. position limiting portion; 112. top plate; 1121. connecting hole; 1122. receiving groove;

[0042] 12. Lower box; X, thickness direction. DETAILED DESCRIPTION

[0043] The 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] The battery device includes a lower box and an upper cover; the upper cover includes a frame and a top plate fixed to the surface of the frame by melting or gluing. However, since the connection structure between the top plate and the frame is relatively simple, the strength of the joint surface between the top plate and the frame is relatively low, resulting in a low structural strength of the upper cover.

[0049] Based on the above considerations, in order to solve the problem of low structural strength of the upper cover of the battery device in the related art, a battery device is designed. By opening a connecting hole on the top plate, on the basis of the frame body being connected to the top plate, the plug-in part fixed on the frame body can also be inserted into the connecting hole. The plug-in part can limit the top plate, and at the same time, the plug-in part can also improve the connection strength with the top plate, so that the connection strength between the frame and the top plate can be effectively strengthened, and then the structural strength of the upper cover can be effectively improved.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells 20 .

[0056] 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.

[0057] 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 .

[0058] 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 .

[0059] 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 .

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] According to some embodiments of the present application, referring to Figures 2 to 6The 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 a frame 111 and a top plate 112, the top plate 112 is provided with a connecting hole 1121; the frame 111 includes a frame body 1111 and a plug-in portion 1112, the frame body 1111 is arranged around the periphery of the top plate 112 and is connected to the top plate 112, the frame body 1111 is connected to the lower box body 12, the plug-in portion 1112 is fixed on the frame body 1111, and the plug-in portion 1112 is inserted into the connecting hole 1121.

[0065] Among them, the upper cover 11 is a rigid structure, which covers the lower box body 12 to define a storage space for accommodating battery cells. 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.

[0066] The upper cover 11 includes a frame 111 and a top plate 112; the top plate 112 may be, but is not limited to, a metal plate (such as a steel plate, an aluminum plate, etc.), an injection-molded plate, a composite plate, etc. A connection hole 1121 is provided on the top plate 112; optionally, the connection hole 1121 may be provided through the top plate 112, for example, through the top plate 112 along the thickness direction X of the top plate 112, or through the top plate 112 along a direction intersecting the thickness direction X of the top plate 112; or, the connection hole 1121 may also be arranged not to penetrate the top plate 112.

[0067] The number of the connection holes 1121 can be one, two, or any number of more than two; the connection holes 1121 can be opened at any position of the top plate 112. The connection holes 1121 can be various hole shapes such as round holes, waist holes, rectangular holes, etc.

[0068] For example, in some embodiments, the top plate 112 may be a rectangular plate, the connection hole 1121 is a through hole opened on the top plate 112 along the thickness direction X of the top plate 112, and the number of the connection holes 1121 may be two; the two connection holes 1121 may be respectively opened at two opposite vertices of the rectangular top plate 112. Alternatively, the number of the connection holes 1121 may be four, and the four connection holes 1121 may be respectively opened at the four vertices of the rectangular top plate 112.

[0069] Alternatively, in other embodiments, still taking the top plate 112 as a rectangular plate as an example, the connection hole 1121 is a through hole opened on the top plate 112 along the thickness direction X of the top plate 112, and the number of the connection holes 1121 can be multiple, such as two, three, four or more. A connection hole 1121 is opened at at least one side edge of the rectangular top plate 112; for example, two or more connection holes 1121 are opened at one side edge, and the multiple connection holes 1121 are arranged in sequence along the extension direction of the side edge; or, connection holes 1121 are opened at both opposite side edges of the rectangular top plate 112; or, connection holes 1121 are opened at three side edges of the rectangular top plate 112, or at all four sides. Exemplarily, the multiple connection holes 1121 can be arranged around the circumference of the top plate 112.

[0070] The frame 111 includes a frame body 1111 and an inserting portion 1112. The frame body 1111 is used to be connected to the outer periphery of the top plate 112, and the frame body 1111 is used to be connected and fixed to the lower box body 12 by fasteners such as bolts. The frame body 1111 can be fixedly connected to the top plate 112 by melting connection, bonding, etc.

[0071] Optionally, the frame body 1111 may be a flat plate structure; or, the frame body 1111 may also be a bent structure. Exemplarily, in some embodiments, the frame body 1111 includes a first frame portion, a second frame portion connected to the first frame portion and forming an angle, and a third frame portion connected to the second frame portion and parallel to the first frame portion, the first frame portion is used to connect to the lower box 12, and the third frame portion is used to connect to the top plate; wherein the second frame portion may be perpendicular to the first frame portion and the third frame portion, and the first frame portion, the second frame portion and the third frame portion are integrally formed by injection molding.

[0072] The plug-in portion 1112 is fixedly connected to the frame body 1111; optionally, the plug-in portion 1112 can be fixed to the frame body 1111 by bonding, melting connection, etc., or the plug-in portion 1112 and the frame body 1111 can be integrally formed by injection molding. The plug-in portion 1112 can be fixed to the inner wall surface of the connection hole 1121 by interference fit, melting connection, bonding, etc. with the connection hole 1121 to achieve further connection between the plug-in portion 1112 and the frame body 1111.

[0073] Among them, the plug-in portion 1112 can be protruded from the surface of the frame body 1111, and when the top plate 112 is connected to the frame body 1111, the plug-in portion 1112 is synchronously plugged into the connecting hole 1121; or, the plug-in portion 1112 can also be formed inside the groove structure of the frame body 1111, and an injection molding operation is performed on the top plate 112 so that the frame body 1111 is formed on opposite sides of the top plate 112, and the plug-in portion 1112 is formed in the connecting hole 1121 of the top plate 112, and the plug-in portion 1112 and the frame body 1111 are integrated.

[0074] The battery device 100 provided in the embodiment of the present application has a connection hole 1121 opened on the top plate 112. While the frame body 1111 is connected to the top plate 112, the plug-in portion 1112 fixed on the frame body 1111 is also inserted into the connection hole 1121. Therefore, the plug-in portion 1112 can limit the top plate 112. At the same time, the plug-in portion 1112 can also improve the connection strength with the top plate 112, so that the connection strength between the frame 111 and the top plate 112 is effectively strengthened, and then the structural strength of the upper cover 11 is effectively improved.

[0075] Please refer to Figure 4 , Figure 7 , Figure 8 and Fig.10 In some embodiments, the frame body 1111 extends to form a first connection portion 1113 , and the first connection portion 1113 is connected to one side of the top plate 112 along the thickness direction X.

[0076] Optionally, the plug-in portion 1112 may be disposed on the first connecting portion 1113 (eg, Figure 8 Alternatively, the plug-in portion 1112 may be disposed on the frame body 1111 and may have no connection relationship with the first connection portion 1113 (eg Fig.10 As shown), that is, the plug-in portion 1112 extending from the frame body 1111 is used to be inserted into the connecting hole 1121, and the first connecting portion 1113 is used to connect with the top plate 112 to improve the connection strength by increasing the connection area.

[0077] The first connection part 1113 includes but is not limited to a connection structure such as a connection block or a connection plate formed on the frame body 1111. The first connection part 1113 can be connected to the top plate 112 by bonding, melting, or the like.

[0078] For example, the first connection portion 1113 may be a connection block, and the number of the connection blocks may be one or any number of more than one; when the number of the connection blocks is multiple, the multiple connection blocks may be sequentially arranged at intervals along the circumference of the top plate 112. Alternatively, the first connection portion 1113 may also be a connection plate, and the frame body 1111 extends axially around the top plate 112 to form an annular connection plate, and the outer peripheral edge of the top plate 112 is covered by the connection plate.

[0079] With such a configuration, the first connecting portion 1113 can be connected to the top plate 112 , and the plug-in portion 1112 can be inserted into the connecting hole 1121 of the top plate 112 to effectively improve the connection strength between the top plate 112 and the frame 111 , thereby improving the structural strength of the upper cover 11 .

[0080] Please refer to Figures 4 to 6 In some embodiments, the frame body 1111 extends to form a second connection portion 1114, and the second connection portion 1114 is connected to the other side of the top plate 112 along the thickness direction X so that a portion of the top plate 112 is located between the first connection portion 1113 and the second connection portion 1114.

[0081] The second connection part 1114 includes but is not limited to a connection structure such as a connection block or a connection plate formed on the frame body 1111. The second connection part 1114 can be connected to the top plate 112 by bonding, melting, or the like.

[0082] For example, the second connection portion 1114 may be a connection block, and the number of the connection blocks may be one or more than one; when the number of the connection blocks is multiple, the multiple connection blocks may be sequentially arranged at intervals along the circumference of the top plate 112. Alternatively, the second connection portion 1114 may also be a connection plate, and the frame body 1111 extends axially around the top plate 112 to form an annular connection plate, and the outer peripheral edge of the top plate 112 is covered by the connection plate.

[0083] Optionally, the top plate 112 may be located between the first connection portion 1113 and the second connection portion 1114 and abut against the frame body 1111 ; or, the top plate 112 may be located between the first connection portion 1113 and the second connection portion 1114 and a gap may be formed between the top plate 112 and the frame body 1111 .

[0084] In this way, the first connection part 1113 and the second connection part 1114 can form connections with the top plate 112 on opposite sides of the top plate 112 respectively. As a result, the frame body 1111 can limit the support and strengthen the connection of the top plate 112 through the first connection part 1113 and the second connection part 1114, thereby further improving the connection strength between the top plate 112 and the frame 111, and further strengthening the structural strength of the upper cover 11.

[0085] Please refer to Figure 4 , Figure 7 and Figure 8 In some embodiments, in the thickness direction X of the top plate 112 , the projection of the connecting hole 1121 is within the projection range of the first connecting portion 1113 , and the plug-in portion 1112 is connected to the first connecting portion 1113 .

[0086] It can be understood that one side opening end of the connection hole 1121 can face the first connection part 1113, so that the plug-in part 1112 can be connected to the first connection part 1113; when the top plate 112 is connected to the first connection part 1113, the plug-in part 1112 can be inserted into the connection hole 1121 of the top plate 112.

[0087] Optionally, the plug-in portion 1112 may be fixedly connected to the first connection portion 1113 by means of melting connection, bonding, etc.; or, the plug-in portion 1112 and the first connection portion 1113 may be formed into one piece by injection molding.

[0088] The first connection portion 1113 may be connected to the surface of the top plate 112 facing the lower box body 12; or, the first connection portion 1113 may be connected to the surface of the top plate 112 facing away from the lower box body 12. Figure 8 As shown, Figure 8 The figure shows the case where the first connection portion 1113 is connected to the surface of the top plate 112 facing the lower box body 12; the case where the first connection portion 1113 is connected to the surface of the top plate 112 facing away from the lower box body 12 is not shown separately.

[0089] With such arrangement, when the top plate 112 is connected to the first connection portion 1113 , the plug-in portion 1112 connected to the first connection portion 1113 can be inserted into the connection hole 1121 , thereby effectively improving the connection strength between the top plate 112 and the frame 111 .

[0090] Please refer to Figures 4 to 6 In some embodiments, in the thickness direction X of the top plate 112 , the projection of the connecting hole 1121 is within the projection range of the second connecting portion 1114 , and the opposite ends of the plug-in portion 1112 are respectively connected to the first connecting portion 1113 and the second connecting portion 1114 .

[0091] It can be understood that the opposite side opening ends of the connecting hole 1121 are respectively oriented toward the first connecting portion 1113 and the second connecting portion 1114; thus, the plug-in portion 1112 can be simultaneously connected to the first connecting portion 1113 and the second connecting portion 1114, that is, on the basis that part of the top plate 112 is connected between the first connecting portion 1113 and the second connecting portion 1114, the plug-in portion 1112 is passed through the connecting hole 1121 and is simultaneously connected to the first connecting portion 1113 and the second connecting portion 1114, so that the top plate 112 and the frame 111 have better connection strength.

[0092] Optionally, the plug-in portion 1112 can be fixedly connected to the first connection portion 1113 and the second connection portion 1114 by means of melting connection, bonding, etc.; or, the plug-in portion 1112 can be integrated with the first connection portion 1113 and the second connection portion 1114 by injection molding.

[0093] With such arrangement, when the top plate 112 is connected between the first connection portion 1113 and the second connection portion 1114 , the plug-in portion 1112 inserted into the connection hole 1121 is simultaneously connected to the first connection portion 1113 and the second connection portion 1114 , thereby increasing the connection strength between the top plate 112 and the frame 111 .

[0094] Please refer to Figures 4 to 6 In some embodiments, a receiving groove 1122 is provided on at least one side of the top plate 112 along the thickness direction X, and a connecting hole 1121 is provided on the bottom wall of the receiving groove 1122; the first connecting portion 1113 is received in the receiving groove 1122 on one side, and a surface of the first connecting portion 1113 is flush with a surface on the same side of the top plate 112; and / or, the second connecting portion 1114 is received in the receiving groove 1122 on the other side, and a surface of the second connecting portion 1114 is flush with a surface on the same side of the top plate 112.

[0095] It can be understood that the accommodating groove 1122 is formed at the circumferential edge of the top plate 112. The accommodating groove 1122 can be formed on one side of the top plate 112 along the thickness direction X; or, the accommodating groove 1122 can be formed on both opposite sides of the top plate 112 along the thickness direction X.

[0096] When the top plate 112 has a receiving groove 1122 on one side of the first connecting portion 1113, the first connecting portion 1113 can be arranged in the receiving groove 1122 on this side, and the surface of the first connecting portion 1113 is flush with the same side surface of the top plate 112, thereby effectively improving the flatness between the top plate 112 and the frame 111 to reduce the probability of mud and water accumulation due to poor flatness.

[0097] When the top plate 112 opens a receiving groove 1122 on one side of the second connecting portion 1114, the second connecting portion 1114 can be arranged in the receiving groove 1122 on this side, and the surface of the second connecting portion 1114 is flush with the same side surface of the top plate 112, thereby effectively improving the flatness between the top plate 112 and the frame 111 to reduce the probability of mud and water accumulation due to poor flatness.

[0098] With such configuration, the top plate 112 can be flush with the surface of the first connection portion 1113 and / or the surface of the second connection portion 1114 to improve the flatness of the top plate 112 and the frame 111 .

[0099] Please refer to Figure 4 , Figure 7 and Figure 8 In some embodiments, in the thickness direction X of the top plate 112 , the projection of the connecting hole 1121 is outside the projection range of the second connecting portion 1114 .

[0100] It can be understood that one side hole end of the connecting hole 1121 can face the first connecting part 1113, and the other side hole end of the connecting hole 1121 can be connected to the outside; thus, one end of the plug-in part 1112 inserted in the connecting hole 1121 can be connected to the first connecting part 1113, and the other end of the plug-in part 1112 can be located in the connecting hole 1121 or extend out of the connecting hole 1121, and the plug-in part 1112 does not form a connection with the second connecting part 1114.

[0101] In this way, part of the top plate 112 can be arranged between the first connecting part 1113 and the second connecting part 1114, and connected to the first connecting part 1113 and the second connecting part 1114; at the same time, the plug-in part 1112 connected to the first connecting part 1113 can be inserted into the connecting hole 1121 of the top plate 112 to improve the connection strength between the frame 111 and the top plate 112.

[0102] Please refer to Figure 3 , Figure 4 and Fig. 9 In some embodiments, the frame 111 further includes a limiting portion 1115 , which is connected to the plug-in portion 1112 ; in the thickness direction X of the top plate 112 , the limiting portion 1115 and the first connecting portion 1113 are respectively in contact with the opposite side surfaces of the top plate 112 .

[0103] The limiting portion 1115 includes but is not limited to limiting structures such as limiting blocks and limiting plates. The limiting portion 1115 can be fixedly connected to the plug-in portion 1112 by melting connection, bonding, etc., or the limiting portion 1115 can be formed integrally with the plug-in portion 1112 by injection molding.

[0104] For example, in some embodiments, the limiting portion 1115 may be a circular limiting plate, and the surface area of ​​the limiting plate is larger than the cross-sectional area of ​​the connecting hole 1121. Thus, the limiting plate and the first connecting portion 1113 can respectively abut against the opposite side surfaces of the top plate 112, and limit the top plate 112 and strengthen the connection.

[0105] With such a configuration, the limiting portion 1115 and the first connecting portion 1113 are respectively in contact with the two opposite side surfaces of the top plate 112 in the thickness direction X, so that the connection strength between the frame 111 and the top plate 112 can be effectively improved.

[0106] Next, the battery device 100 provided in the embodiment of the present application will be further described according to specific implementations.

[0107] Please refer to Figures 2 to 6 In this embodiment, the battery device 100 includes a lower box 12 and an upper cover 11; the upper cover 11 includes a frame 111 and a top plate 112, and the top plate 112 is provided with a connection hole 1121. The frame 111 includes a frame body 1111 and a plug-in portion 1112, and the frame body 1111 is extended to form a first connection portion 1113 and a second connection portion 1114, wherein the first connection portion 1113 is connected to one side of the top plate 112 along the thickness direction X, and the second connection portion 1114 is connected to the other side of the top plate 112 along the thickness direction X, so that part of the top plate 112 is located between the first connection portion 1113 and the second connection portion 1114. In the thickness direction X of the top plate 112, the projection of the connection hole 1121 is simultaneously within the projection range of the first connection portion 1113 and the projection range of the second connection portion 1114, and the opposite ends of the plug-in portion 1112 are respectively connected to the first connection portion 1113 and the second connection portion 1114.

[0108] Meanwhile, the frame 111 is integrally formed by injection molding; the top plate 112 with the connection hole 1121 is placed in an injection mold, the mold is closed and a plastic melt is injected into the mold, the plastic melt is melted and combined with the circumferential edge of the top plate 112, and the plastic melt can flow into the connection hole 1121. After the plastic melt is cooled, the integrally formed frame body 1111, the first connection part 1113, the second connection part 1114 and the plug part 1112 located between the first connection part 1113 and the second connection part 1114 can be obtained.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] As an example, the power distribution module can be used to distribute power to modules in the energy storage device that require power.

[0120] 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 stability, the stability of the energy storage device is better.

[0121] 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 or an energy storage device as described above, wherein the battery device 100 is used to store or provide electrical energy.

[0122] 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.

[0123] 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 a frame and a top plate, and a connecting hole is formed on the top plate; the frame comprises a frame body and a plug-in portion, the frame body is arranged around the periphery of the top plate and connected to the top plate, the frame body is connected to the lower box body, the plug-in portion is fixed on the frame body, and the plug-in portion is inserted into the connecting hole.

2. The battery device according to claim 1, characterized in that: The frame body is extended to form a first connection portion, and the first connection portion is connected to one side of the top plate along the thickness direction.

3. The battery device according to claim 2, characterized in that: The frame body is extended to form a second connection portion, and the second connection portion is connected to the other side of the top plate in the thickness direction, so that a portion of the top plate is located between the first connection portion and the second connection portion.

4. The battery device according to claim 3, characterized in that: In the thickness direction of the top plate, the projection of the connection hole is within the projection range of the first connection portion, and the plug-in portion is connected to the first connection portion.

5. The battery device according to claim 4, characterized in that: In the thickness direction of the top plate, the projection of the connection hole is within the projection range of the second connection portion, and opposite ends of the plug-in portion are respectively connected to the first connection portion and the second connection portion.

6. The battery device according to claim 5, characterized in that: The top plate is provided with a receiving groove on at least one side along the thickness direction, and the connecting hole is provided on the bottom wall of the receiving groove; The first connecting portion is accommodated in the accommodating groove on one side, and the surface of the first connecting portion is flush with the surface of the same side of the top plate; and / or the second connecting portion is accommodated in the accommodating groove on the other side, and the surface of the second connecting portion is flush with the surface of the same side of the top plate.

7. The battery device according to claim 4, characterized in that: In the thickness direction of the top plate, a projection of the connection hole is outside a projection range of the second connection portion.

8. The battery device according to claim 4, characterized in that: The frame further includes a limiting portion, which is connected to the plug-in portion; in the thickness direction of the top plate, the limiting portion and the first connecting portion are respectively in contact with two opposite side surfaces of the top plate.

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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