Battery device, battery box and electric device

Abstract

The utility model discloses a battery device, a battery box and a power utilization device, and relates to the technical field of batteries, the battery device comprises a battery monomer and a battery box, the battery box comprises a box body, a cover body and a sealing element, the box body is provided with an accommodating cavity for accommodating the battery monomer, and the peripheral side of an opening of the accommodating cavity is provided with a sealing surface; the cover body comprises a cover main body and a connecting structure, the connecting structure is connected to at least part of the side edge of the cover main body in a bent mode, the cover main body covers the opening and the sealing face of the containing cavity, the connecting structure is located on the side of the box body, and the cover body is connected with the box body through the connecting structure; a seal is disposed between the sealing surface and the cap body. According to the technical scheme, the volume energy density of the battery device can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device, a battery box and an electric device. Background Art

[0002] With the rapid development of new energy vehicles, batteries are increasingly entering the public's field of vision. A battery device generally includes a plurality of battery cells, which can be arranged in series, in parallel, or in series and parallel in a battery box.

[0003] The battery box includes a box body and a cover body, and a sealing gasket is arranged between the cover body and the box body. In the related art, mounting holes are arranged on the cover body and the sealing gasket for passing bolts to seal the cover body and the box body. In order to avoid poor sealing at the position of the locking bolts, a wider sealing surface needs to be arranged, resulting in a large space occupied by the box body, reducing the size of the accommodating cavity for accommodating the battery cell, affecting the battery cell capacity of the battery device, and thus affecting the overall volume energy density of the battery device. Utility Model Content

[0004] The main purpose of the utility model is to provide a battery device, a battery box and an electrical device, aiming at improving the volume energy density of the battery device.

[0005] To achieve the above-mentioned purpose, the battery device proposed by the utility model includes a battery cell and a battery box, and the battery box includes:

[0006] A box body, wherein the box body is provided with a receiving cavity for receiving the battery monomer, and the opening circumference of the receiving cavity is provided with a sealing surface;

[0007] A cover body, the cover body comprising a cover body and a connecting structure, the connecting structure being bent and connected to at least a portion of a side of the cover body, the cover body covering the opening of the accommodating cavity and the sealing surface, the connecting structure being located on the side of the box body, and the cover body being connected to the box body via the connecting structure; and

[0008] A sealing member is disposed between the sealing surface and the cover body.

[0009] With this arrangement, when the cover is closed on the box body, the connection structure is located on the side of the box body to connect with the box body, thereby eliminating the need to reserve bolt holes on the sealing surface and the seal, and reducing the width of the sealing surface, thereby reducing the wall thickness of the box body, providing more space for accommodating battery cells, thereby increasing the volume energy density of the battery device.

[0010] In one embodiment, the box body is provided with an outer flange, and the outer flange is extended to the outside of the opening of the accommodating cavity;

[0011] The connection structure includes a connecting portion and a limiting portion connected to each other, the connecting portion is connected to the cover body and is bent relative to the cover body, the connecting portion is located outside the sealing member and the outer flange, and the limiting portion is located on the side of the outer flange away from the sealing surface and abuts against the outer flange.

[0012] With this arrangement, when connecting the cover body and the box body, the cover body is first pressed against the box body, and then the connecting structure is bent or riveted to form a limiting portion, and the outer flange of the box body is clamped between the cover body and the limiting portion to connect the cover body and the box body. Compared with the method of sequentially locking multiple bolts to connect the box body and the cover body, the above method not only reduces the number of parts in the battery device, but also makes it more convenient to connect and fix the cover body and the box body, thereby improving production efficiency.

[0013] In one embodiment, the connection structure is riveted to the box body, and the limiting portion is configured as a riveted protrusion.

[0014] This arrangement makes it easy to form a limiting portion, making the connection between the cover body and the box body more convenient and improving the assembly efficiency.

[0015] In one embodiment, the limiting portion is bent and extended from the connecting portion toward one side of the outer flange, and the connecting structure covers the outer flange.

[0016] This arrangement allows the connection structure to be wrapped around the outside of the outer flange, which can improve the connection strength between the cover body and the box body, and the limiting portion is completely accommodated on the back side of the outer flange, which is not easy to interfere with other devices, thereby ensuring the connection stability between the cover body and the box body.

[0017] In one embodiment, an outer side wall of the box body is provided with an avoidance groove, and the outer flange is provided as a side groove wall of the avoidance groove.

[0018] This arrangement mode, by providing an avoidance groove on the outer side wall of the box body, a groove wall on one side of the avoidance groove forms an outer flange on the outer side of the opening of the accommodating cavity, which can prevent the edge of the cover body from protruding from the outer wall surface of the box body, which is conducive to increasing the space of the accommodating cavity, allowing the battery device to accommodate more battery cells, and is conducive to improving the volume energy density of the battery device. In addition, the edge of the cover body will not protrude from the outer side wall of the box body, avoiding interference with other devices when installing the battery device.

[0019] In one embodiment, the cover body is provided with the connection structure at least on two sides thereof spaced apart along the first direction.

[0020] By adopting the above method, the width of the sealing surfaces on both sides of the opening of the accommodating cavity can be reduced along the first direction, thereby reducing the wall thickness of the box body in the first direction, effectively saving space in the battery box for accommodating more battery cells, which is beneficial to improving the volume energy density of the battery device.

[0021] In one embodiment, the connection structure is provided on at least one of the two sides of the cover body spaced apart along a second direction, and the second direction intersects with the first direction.

[0022] This arrangement can reduce the width of the sealing surface in both the length and width directions of the battery box, reduce the wall thickness of the box in both the length and width directions, and increase the size of the accommodating cavity in both the length and width directions. In addition, when all sides of the cover body are connected to the box body through a connecting structure, there is no need to use bolts to pass through the cover body in the height direction to connect the cover body and the box body, which also saves the space occupied by the bolt head in the height direction, so that the size of the accommodating cavity in the height direction can also be increased at the same design height. In this way, it can accommodate higher battery cells or be used to accommodate more battery cells, thereby improving the volume energy density of the battery device.

[0023] In one embodiment, two sides of the cover body spaced apart along a second direction are connected to the box body through locking accessories, the locking accessories penetrate the cover body and the sealing surface, and the second direction intersects with the first direction.

[0024] In this arrangement, the cover body is connected to the box body by means of a locking accessory, so that the connection strength and sealing between the cover body and the box body can be improved.

[0025] In one embodiment, the connection structure is extended along a side edge of the cover body.

[0026] This arrangement increases the connection area between the connection structure and the box body, and improves the connection strength and sealing between the cover body and the box body.

[0027] The present application also proposes a battery box, comprising:

[0028] A box body, wherein the box body is provided with a receiving cavity for receiving the battery monomer, and a sealing surface is provided around the opening of the receiving cavity;

[0029] A cover body, the cover body comprising a cover body and a connecting structure, the connecting structure being bent and connected to at least a portion of a side of the cover body, the cover body covering the opening of the accommodating cavity and the sealing surface, the connecting structure being located on the side of the box body, and the cover body being connected to the box body via the connecting structure; and

[0030] A sealing member is disposed between the sealing surface and the cover body.

[0031] The present application also proposes an electrical device, which includes the battery device in any of the aforementioned embodiments.

[0032] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0035] Figure 2 A schematic diagram of the structure of a battery device according to some embodiments of the present application;

[0036] Figure 3 An exploded view of a battery device according to some embodiments of the present application;

[0037] Figure 4 A cross-sectional view of a battery box along the Y direction in a battery device in some embodiments of the present application;

[0038] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0039] Figure 6 A cross-sectional view of a battery box along the Y direction in a battery device in some embodiments of the present application;

[0040] Figure 7 A schematic diagram of the structure of a battery device according to some embodiments of the present application;

[0041] Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0042] Description of Figure Numbers:

[0043] 1000. Vehicle; 100. Battery device; 10. Battery box; 1. Box body; 11. Accommodating cavity; 12. Sealing surface; 13. Outer flange; 14. Avoidance groove; 2. Cover body; 21. Cover body; 22. Connection structure; 221. Connection part; 222. Limiting part; 2221. Riveted protrusion; 3. Seal; 4. Locking accessory; 20. Battery cell; 200. Controller; 300. Motor.

[0044] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0048] 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.

[0049] In the related art, the battery device generally includes a box body, a cover body and a battery cell, wherein the cover body is connected to the box body, and the battery module is arranged in a receiving cavity closed by the cover body and the box body. In the related art, a sealing gasket is arranged between the cover body and the box body, and mounting holes are arranged on the cover body and the sealing gasket for passing bolts to lock and seal the cover body and the box body. In order to avoid poor sealing at the position of the locking bolt, a wider sealing surface needs to be arranged, resulting in a large space occupied by the box body, which will affect the capacity of the battery cell of the battery device, thereby affecting the overall volume energy density of the battery device.

[0050] Based on the above considerations, in order to solve the problem that the box body 1 in the battery device 100 occupies a large space and affects the volume energy density of the battery device 100, a battery device 100 is designed, which includes a battery cell 20 and a battery box 10. The battery box 10 includes a box body 1, a cover body 2 and a seal 3. The box body 1 is provided with a accommodating cavity 11 for accommodating the battery cell 20, and the opening circumferential side of the accommodating cavity 11 has a sealing surface 12; the cover body 2 includes a cover body 21 and a connecting structure 22 bent and connected to the edge of the cover body 21, the cover body 21 covers the opening and the sealing surface 12 of the accommodating cavity 11, the connecting structure 22 is located on the side of the box body 1, and the cover body 2 is connected to the box body 1 through the connecting structure 22; the seal 3 is arranged between the sealing surface 12 and the cover body 21.

[0051] In such a battery device 100, when the cover body 2 is closed on the box body 1, the cover body 2 is connected to the box body 1 through the connecting structure 22 located on the side of the box body 1, so there is no need to reserve bolt holes on the sealing surface 12 and the sealing member 3 on the side around the opening of the accommodating cavity 11. The width of the sealing surface 12 and the sealing member 3 can be reduced, and the wall thickness of the box body 1 can be reduced, so that there is more space in the battery device 100 for accommodating the battery cells 20, so as to improve the volume energy density of the battery device 100.

[0052] The battery device 100 in the present application can be used as a power source or power system for an electrical device. The battery device 100 refers to a single physical module including one or more battery cells 20 to provide higher voltage and capacity, which is conducive to improving the overall performance of the battery device 100 and facilitating the promotion of the battery device 100.

[0053] The above-mentioned electrical devices may be, but are not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles and spacecraft, etc.

[0054] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0055] 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 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0056] 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.

[0057] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the battery box 10; of course, the battery device 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the battery box 10. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0058] The battery cell 20 may be a secondary battery or a primary battery, a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular or in other shapes.

[0059] According to some embodiments of the present application, referring to Figures 2 to 5 , Figure 2 is a structural diagram of a battery device 100 according to some embodiments of the present application. Figure 3 is an exploded view of a battery device 100 according to some embodiments of the present application. Figure 4 and Figure 5 1 and 2 are cross-sectional views and partial cross-sectional views of the battery box 10 along the Y direction in the battery device 100 according to some embodiments of the present application.

[0060] As shown in the figure, the X direction in the figure is the width direction of the battery device 100, the Y direction is the length direction of the battery device 100, and the Z direction is the height direction of the battery device 100.

[0061] like Figure 2 Combined with Figures 3 to 5 As shown, the present application provides a battery device 100, which includes a battery cell 20 and a battery box 10, the battery box 10 includes a box body 1, a cover body 2 and a seal 3, the box body 1 is provided with a accommodating cavity 11 for accommodating the battery cell 20, and the opening circumferential side of the accommodating cavity 11 has a sealing surface 12; the cover body 2 includes a cover body 21 and a connecting structure 22, the connecting structure 22 is bent and connected to at least part of the side of the cover body 21, the cover body 21 covers the opening and the sealing surface 12 of the accommodating cavity 11, the connecting structure 22 is located on the side of the box body 1, and the cover body 2 is connected to the box body 1 through the connecting structure 22; the seal 3 is arranged between the sealing surface 12 and the cover body 21.

[0062] In the embodiment of the present application, the battery box 10 can be set as a rectangular parallelepiped or other polygonal structures. The box body 1, as the main structure of the battery box 10, includes a bottom plate and a side wall arranged around the bottom plate. The bottom plate and the side wall enclose a receiving cavity 11 with an opening. The opening of the receiving cavity 11 is arranged opposite to the bottom plate along the height direction of the battery box 10. A sealing surface 12 is formed around the opening of the receiving cavity 11. Optionally, the side wall has a certain thickness, and the end surface of the side wall away from the bottom plate can be used as the sealing surface 12; in some embodiments, an outer flange 13 can also be connected to the end of the side wall away from the bottom plate, and the sealing surface 12 is formed by the surface of the outer flange 13 and the end surface of the side wall. The sealing surface 12 is used to set the sealing member 3. The sealing surface 12 can be set as a plane. In some embodiments, a groove can also be set on the sealing surface 12 for limiting the sealing member 3. The sealing member 3 can be set as a sealing gasket, which is made of rubber material, felt material or other materials. The sealing member 3 can also be formed by curing a sealant.

[0063] The cover body 2 refers to a component that covers the opening of the box body 1 to isolate the accommodating cavity 11 from the external environment. The shape of the cover body 2 can be adapted to the shape of the box body 1 to match the box body 1. The cover body 2 includes a cover body 21 and a connecting structure 22. The cover body 21 is adapted to the shape and contour of one end of the box body 1 away from the bottom plate. The connecting structure 22 is bent relative to the cover body 21. When the cover body 2 is covered on the box body 1, the cover body 21 is covered at the opening position of the accommodating cavity 11 and covers the sealing member 3. The sealing member 3 can fill the gap between the cover body 21 and the sealing surface 12 to improve the sealing performance of the battery device 100.

[0064] The connection structure 22 is arranged opposite to the side of the box body 1, and the box body 1 and the cover body 2 are connected to each other through the connection structure 22 and the box body 1. Optionally, the connection structure 22 can be connected to the side wall of the box body 1 by bolts, or can be set as a riveting structure or a bending structure. For example, in the following embodiment, the limit portion 222 is formed to limit the outer flange 13 of the box body 1, and the cover body 2 can be connected to the box body 1 through the connection structure 22. In this arrangement, there is no need to set a bolt hole on the sealing surface 12 on the side where the connection structure 22 is set, so that the size of the sealing surface 12 in its width direction can be reduced; the side wall thickness of the box body 1 in the width direction of the sealing surface 12 can be reduced, and the space occupied by the box body 1 in this direction is reduced, so that more space is used to form the accommodating cavity 11 to accommodate more battery cells 20, thereby improving the energy density of the battery device 100.

[0065] In the embodiment of the present application, the width direction of the sealing surface 12 is parallel to the plane direction of the sealing surface 12 , and is perpendicular to the boundary line between the sealing surface 12 and the opening of the accommodating cavity 11 .

[0066] Optionally, the connection structure 22 can be arranged around the cover body 21, that is, each side of the cover body 2 is connected to the box body 1 through the connection structure 22. In this way, the width of the sealing surface 12 at each side of the battery box 10 can be reduced, thereby fully increasing the accommodating cavity 11.

[0067] Optionally, the connection structure 22 may be provided only on part of the side edges of the cover 2. For example, in order to optimize the space design in the width direction to accommodate more battery cells 20, the connection structure 22 may be provided on one or both sides in the width direction of the cover 2 to reduce the width of the sealing surface 12 in the width direction of the battery box 10, thereby reducing the thickness of the side wall of the box 1 in the width direction and increasing the width dimension of the accommodating cavity 11, so that more battery cells 20 can be used and the volume energy density of the battery device 100 can be improved. In this embodiment, on both sides of the length direction of the battery box 10, bolts or other locking accessories 4 may be used to pass through the cover body 21 to connect the cover body 21 and the box 1, so that the battery box 10 is stably connected at all places around the side, thereby improving the connection strength and sealing between the box 1 and the cover 2.

[0068] like Figures 4 to 6 As shown, according to some embodiments of the present application, the box body 1 is provided with an outer flange 13, and the outer flange 13 is extended to the outside of the opening of the accommodating cavity 11; the connecting structure 22 includes a connecting portion 221 and a limiting portion 222 connected to each other, the connecting portion 221 is connected to the cover body 21 and is bent relative to the cover body 21, the connecting portion 221 is located on the outside of the seal 3 and the outer flange 13, and the limiting portion 222 is located on the side of the outer flange 13 away from the sealing surface 12, and abuts against the outer flange 13.

[0069] In this embodiment, an outer flange 13 is formed on the outer side of the opening of the accommodating cavity 11, and a relief space is provided on the side of the outer flange 13 away from the sealing surface 12. Optionally, the outer flange 13 can be connected to the outer side of the side wall of the box body 1, for example, by bending to form the outer flange 13 through a bending process, or the outer flange 13 and the side wall are integrally injection molded. In addition, a relief groove 14 can also be provided on the outer side wall of the box body 1 to form a relief space, in which case the side of the relief groove 14 close to the sealing surface 12 forms the outer flange 13, and the outer flange 13 forms a side groove wall of the relief groove 14.

[0070] When connecting the cover body 2 and the box body 1, the cover body 21 is first pressed onto the box body 1, and then the connection structure 22 is bent or riveted to the back side of the outward flange 13 to form a limiting portion 222. The seal 3 and the outward flange 13 of the box body 1 are clamped between the cover body 21 and the limiting portion 222 to connect the cover body 2 and the box body 1. Compared with the method of sequentially locking multiple bolts to connect the box body 1 and the cover body 2, the above method can reduce the number of parts in the battery device 100, and the cover body 2 and the box body 1 are also more convenient to connect and fix, which can improve production efficiency.

[0071] See also Figure 6 In one embodiment, the connection structure 22 is riveted to the box body 1 , and the limiting portion 222 is configured as a riveting protrusion 2221 .

[0072] In specific applications, the connection structure 22 is deformed to partially bulge toward one side of the avoidance space by riveting the tool to form a limit portion 222, which makes the connection between the cover body 2 and the box body 1 more convenient and improves assembly efficiency. Optionally, multiple riveting protrusions 2221 can be arranged at intervals along the edge of the cover body 2, or a ridge structure with a certain length extending along the side of the cover body 2 can be arranged, which is not limited here.

[0073] See also Figure 5 In one embodiment, the limiting portion 222 is bent and extended from the connecting portion 221 to one side of the outer flange 13 , and the connecting structure 22 covers the outer flange 13 .

[0074] This design, when used in practice, causes the connection structure 22 to be bent toward one side of the avoidance space to form a limiting portion 222. The connection structure 22 covers the outer flange 13, which can improve the connection strength between the cover body 2 and the box body 1. The limiting portion 222 is completely accommodated in the avoidance space on the back side of the outer flange 13 and is not easy to interfere with other devices, thereby ensuring the connection stability between the cover body 2 and the box body 1.

[0075] Combined with reference Figure 4 and Figure 5 In one embodiment, an outer side wall of the box body 1 is provided with an avoidance groove 14 , and the outer flange 13 is provided as a side groove wall of the avoidance groove 14 .

[0076] This design method, by setting an avoidance groove 14 on the outer wall of the box body 1, and forming an outer flange 13 on the outer side of the opening of the accommodating chamber 11 on one side of the avoidance groove 14, can prevent the edge of the cover body 2 from protruding from the outer wall surface of the box body 1, increase the space occupied by the accommodating chamber 11, and allow the battery device 100 to accommodate more battery cells 20, which is conducive to improving the volume energy density of the battery device 100. In addition, the connection structure 22 of the cover body 2 will not protrude from the outer wall surface of the box body 1, which can reduce the risk of interference between the connection structure 22 and other devices when installing the battery device 100.

[0077] See also Figure 4 and Figure 6 According to some embodiments of the present application, the cover body 2 is provided with connection structures 22 at least on two sides spaced apart along the first direction.

[0078] In this embodiment, the cover 2 is provided with connection structures 22 on both sides of the cover 2 spaced apart in the first direction, and the two connection structures 22 are arranged opposite to each other. When the cover 2 is covered on the box 1, the two connection structures 22 correspond to the two side walls of the box 1 facing each other. With such a design, the width of the sealing surface 12 on both sides of the opening of the accommodating cavity 11 in the first direction can be reduced, and the thickness of the side wall of the box 1 in the first direction can be fully reduced, which effectively saves the space of the battery box 10 for accommodating more battery cells 20, and is conducive to improving the volume energy density of the battery device 100. Optionally, the first direction is the width direction of the battery box 10.

[0079] Optionally, a connection structure 22 may also be provided on other sides of the cover body 2, or bolts or other locking accessories 4 may be used to connect the cover body 21 and the box body 1 at other edge areas of the cover body 2. The connection structure 22 is provided on at least one of the two sides of the cover body 2 spaced apart along the second direction, and the second direction intersects with the first direction. For example, the connection structure 22 may be provided on both sides of the cover body 2 spaced apart along the second direction, or the connection structure 22 may be provided on one side, and a bolt or other locking accessory 4 may be used to penetrate the cover body 21 and the sealing surface 12 on the other side to connect the cover body 21 and the box body 1.

[0080] See also Figure 2 According to some embodiments of the present application, a connection structure 22 is provided on at least one of the two sides of the cover body 2 spaced apart along the second direction.

[0081] In this embodiment, the first direction may be the width direction of the battery device 100 (eg Figure 3 The second direction is the length direction of the battery device 100 (eg, Figure 3Y direction in the figure). The connection structures 22 can be provided on both sides of the cover body 2 spaced apart along the second direction, that is, the cover body 2 is connected to the box body 1 through the connection structures 22 located on the sides of the box body 1 on both sides in the width direction and the length direction; the connection structure 22 can also be provided on one side, and the cover body 21 and the sealing surface 12 are penetrated by bolts or other locking accessories 4 on the other side to connect the cover body 21 and the box body 1; in this way, the width of the sealing surface 12 can be reduced in both the length direction and the width direction of the battery box 10, and the wall thickness of the box body 1 in both the length direction and the width direction can be reduced, so that the size of the accommodating cavity 11 in both the length direction and the width direction can be increased, and more battery cells 20 can be accommodated, which is beneficial to improving the volume energy density of the battery device 100.

[0082] Furthermore, when all sides of the cover body 2 are connected to the box body 1 through the connection structure 22, it is not necessary to use bolts to connect the cover body 2 in the height direction (for example, Figure 3 The Z direction) passes through the cover body 21 to connect the cover body 2 and the box body 1, which also saves the space occupied by the bolt head in the height direction. Therefore, at the same design height, by reducing the space occupied by the bolt head, the size of the accommodating cavity 11 in the height direction can be increased, and a taller battery cell 20 can be accommodated or more battery cells 20 can be accommodated, thereby improving the volume energy density of the battery device 100.

[0083] See also Figure 7 and Figure 8 According to some embodiments of the present application, the two sides of the cover body 2 spaced apart along the second direction are connected to the box body 1 through a locking accessory 4, and the locking accessory 4 penetrates the cover body 21 and the sealing surface 12, and the second direction intersects with the first direction.

[0084] In this embodiment, the locking accessory 4 can be a structure such as a bolt or a rivet. The cover body 21 is connected to the box body 1 through the locking accessory 4, which can improve the connection strength and sealing between the cover body 2 and the box body 1.

[0085] In one embodiment, the connection structure 22 is extended along the side of the cover body 21. Figure 3 The connection structures 22 are arranged on both sides of the battery device 100 in the X direction (i.e., Figure 3 This design increases the connection area between the connection structure 22 and the box body 1, and improves the connection strength and sealing between the cover body 2 and the box body 1.

[0086] The present application also proposes an electric device, which includes the battery device 100 in any of the above embodiments. The specific structure of the battery device 100 in this embodiment refers to the above embodiments. Since all the technical solutions of all the above embodiments are adopted in the electric device, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0087] The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0088] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0089] 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 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0090] 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.

[0091] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery device, characterized in that: The invention comprises a battery cell and a battery box, wherein the battery box comprises: A box body, wherein the box body is provided with a receiving cavity for receiving the battery monomer, and the opening circumference of the receiving cavity is provided with a sealing surface; A cover body, the cover body comprising a cover body and a connecting structure, the connecting structure being bent and connected to at least a portion of a side of the cover body, the cover body covering the opening of the accommodating cavity and the sealing surface, the connecting structure being located on the side of the box body, and the cover body being connected to the box body via the connecting structure; and A sealing member is disposed between the sealing surface and the cover body.

2. The battery device according to claim 1, characterized in that The box body is provided with an outer flange, and the outer flange is extended to the outside of the opening of the accommodating cavity; The connection structure includes a connecting portion and a limiting portion connected to each other, the connecting portion is connected to the cover body and is bent relative to the cover body, the connecting portion is located outside the sealing member and the outer flange, and the limiting portion is located on the side of the outer flange away from the sealing surface and abuts against the outer flange.

3. The battery device according to claim 2, characterized in that: The connection structure is riveted and matched with the box body, and the limiting portion is configured as a riveting protrusion.

4. The battery device according to claim 2, characterized in that: The limiting portion is bent and extended from the connecting portion toward one side of the outer flange, and the connecting structure covers the outer flange.

5. The battery device according to claim 2, characterized in that: The outer side wall of the box body is provided with an avoidance groove, and the outer flange is arranged as a side groove wall of the avoidance groove.

6. The battery device according to claim 1, wherein: The cover body is provided with the connection structure at least on two sides thereof spaced apart along the first direction.

7. The battery device according to claim 6, characterized in that: The connection structure is disposed on at least one of the two sides of the cover body spaced apart along a second direction, and the second direction intersects with the first direction.

8. The battery device according to claim 6, characterized in that: The two sides of the cover body spaced apart along the second direction are connected to the box body through locking accessories, and the locking accessories are penetrated through the cover body and the sealing surface. The second direction intersects with the first direction.

9. The battery device according to any one of claims 1 to 8, characterized in that: The connection structure is extended along the side of the cover body.

10. A battery box, characterized in that: include: A box body, wherein the box body is provided with a receiving cavity for receiving the battery monomer, and a sealing surface is provided around the opening of the receiving cavity; A cover body, the cover body comprising a cover body and a connecting structure, the connecting structure being bent and connected to at least a portion of a side of the cover body, the cover body covering the opening of the accommodating cavity and the sealing surface, the connecting structure being located on the side of the box body, and the cover body being connected to the box body via the connecting structure; and A sealing member is disposed between the sealing surface and the cover body.

11. An electrical device, characterized in that: Comprising a battery device as claimed in any one of claims 1 to 9.

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