Battery device, battery box and electric device

Abstract

The utility model discloses a battery device, a battery box and an electric device, and relates to the technical field of batteries. Wherein the battery device comprises a single battery and a battery box, the battery box comprises a box body, a cover body, a sealing element and a first locking accessory, the box body is provided with a containing cavity for containing the single battery, and the peripheral side of an opening of the containing 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, and the connecting structure is located on the side of the box body. The sealing piece is arranged between the sealing surface and the cover main body; the first lock accessory penetrates through the connecting structure and connects the connecting structure to the side of the box body. According to the technical scheme, the volume energy density of the battery device can be improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery device, a battery box, and an electrical device. Background Technology

[0002] With the rapid development of new energy vehicles, batteries are increasingly coming into the public eye. Battery devices typically consist of multiple battery cells, which can be connected in series, parallel, or series-parallel in a battery box.

[0003] The battery box includes a box body and a cover, with a sealing gasket between the cover and the box body. In related technologies, mounting holes are provided on the cover and the sealing gasket for bolts to pass through and seal the cover and box body. To avoid poor sealing at the bolt locations, a wider sealing surface is required, resulting in a larger space occupied by the box body, reducing the size of the cavity housing the battery cells, affecting the battery cell capacity of the battery pack, and thus affecting the overall volumetric energy density of the battery pack. Utility Model Content

[0004] The main purpose of this utility model is to provide a battery device, a battery box, and an electrical device, which aims to improve the volumetric energy density of the battery device.

[0005] To achieve the above objectives, the present invention proposes a battery device comprising a battery cell and a battery case. The battery case includes a case body, a cover, a sealing element, and a first locking accessory. The case body is provided with a receiving cavity for accommodating the battery cell, and the opening of the receiving cavity has a sealing surface on its periphery.

[0006] The cover includes a cover body and a connecting structure. The connecting structure is bent and connected to at least a portion of the side of the cover body. The cover body covers the opening of the receiving cavity and the sealing surface. The connecting structure is located on the side of the box body. The sealing element is disposed between the sealing surface and the cover body. The first locking accessory passes through the connecting structure and connects the connecting structure to the side of the box body.

[0007] In this configuration, when the cover is closed onto the housing, the connecting structure is located on the side of the housing and connected to the housing via the first locking attachment. This eliminates the need to pre-drill bolt holes on the sealing surface and the sealing element, reducing the width of the sealing surface and thus reducing the wall thickness of the housing. This provides more space to accommodate individual battery cells, thereby increasing the volumetric energy density of the battery device.

[0008] In one embodiment, the box body includes a box body, a first flange and a side flange. The box body is provided with the receiving cavity. The first flange is connected to the outside of the opening of the receiving cavity and is provided with at least a portion of the sealing surface. The side flange is bent and connected to the first flange.

[0009] The connecting structure is disposed opposite to the side flange, and the first lock accessory connects the connecting structure and the side flange.

[0010] This design increases the connection depth between the first locking accessory and the housing, improving connection strength. It also allows for more connection methods between the connecting structure and the housing, eliminating the need for direct screw holes on the housing sidewall. Instead, rivets, bolts, and nuts can be used for fastening, making the application more flexible.

[0011] In one embodiment, the side flange is spaced apart from the side wall of the box body, and the first locking accessory includes a connecting rod, a first limiting structure disposed at one end of the connecting rod, and a second limiting structure disposed at the other end of the connecting rod;

[0012] The connecting rod passes through the connecting structure and the side flange, and the connecting structure and the side flange are sandwiched between the first limiting structure and the second limiting structure.

[0013] This design eliminates the need for screw holes on the housing, simplifying the housing structure and improving processing convenience.

[0014] In one embodiment, the first lock accessory is a rivet. This design facilitates the connection between the cover and the box, improving assembly efficiency.

[0015] In one embodiment, the first lock accessory is configured as a bolt, which is threadedly connected to the housing.

[0016] This design not only provides a strong connection between the casing and the cover, but also makes them easy to disassemble, thus facilitating the maintenance of the battery device.

[0017] In one embodiment, the outer side wall of the housing is provided with a clearance groove, and the connecting structure is located in the clearance groove.

[0018] This design avoids the edge of the cover protruding from the outer wall of the housing, which helps to increase the space of the housing, allowing the battery pack to accommodate more individual cells and thus improving the volumetric energy density of the battery pack. Furthermore, the edge of the cover does not protrude from the outer wall of the housing, preventing interference with other components during battery installation.

[0019] In one embodiment, the connecting structure is provided on at least two sides of the cover that are spaced apart along a first direction.

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

[0021] In one embodiment, the connecting structure is provided on at least one of the two sides of the cover that are spaced apart along a second direction, the second direction intersecting the first direction.

[0022] This design reduces the width of the sealing surface and the wall thickness of the battery box in both the length and width directions, allowing for a larger cavity in both directions. Furthermore, since the cover is connected to the box via connecting structures on each side, bolts are not needed to pass through the cover body along the height direction, saving space occupied by bolt heads. This allows for a larger cavity at the same design height, enabling the installation of taller or more battery cells, thus increasing the volumetric energy density of the battery device.

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

[0024] This design, which connects the lid body to the box body via a second locking attachment, can improve the connection strength and sealing between the lid body and the box body.

[0025] In one embodiment, the housing is provided with a second flange located outside the opening of the receiving cavity along the second direction, and the second locking attachment connects the cover body and the second flange.

[0026] This design expands the size of the sealing surface by using a second flange, which not only meets the sealing performance requirements but also provides ample space for attaching the second locking accessory. This eliminates the need for thicker side walls of the receiving cavity, saving on housing material.

[0027] This application also proposes a battery box, which includes:

[0028] The housing has a cavity for accommodating individual battery cells, and the opening of the cavity has a sealing surface on its periphery.

[0029] A cover body, comprising a cover body and a connecting structure, wherein the connecting structure is bent and connected to at least a portion of the side of the cover body, the cover body covers the opening of the receiving cavity and the sealing surface, and the connecting structure is located on the side of the box body;

[0030] A sealing element, wherein the sealing element is disposed between the sealing surface and the cover body; and

[0031] A first locking accessory is inserted through the connecting structure and connected to the housing.

[0032] This application also proposes an electrical device that includes the battery device in any of the foregoing embodiments.

[0033] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0036] Figure 2 This is a schematic diagram of the structure of a battery device according to some embodiments of this application;

[0037] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0038] Figure 4 Exploded views of battery devices according to some embodiments of this application;

[0039] Figure 5 This is a cross-sectional view along the Y direction of the battery box in a battery device according to some embodiments of this application;

[0040] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0041] Figure 7 This is a cross-sectional view along the Y direction of the battery box in a battery device according to some embodiments of this application.

[0042] Explanation of icon numbers:

[0043] 1000, Vehicle; 100, Battery assembly; 10, Battery box; 1, Box body; 11, Box main body; 111, Receiving cavity; 12, First flange; 13, Side flange; 14, Second flange; 15, Sealing surface; 16, First connecting hole; 17, Clearance groove; 18, Second connecting hole; 19, Riveting stud; 2, Cover; 21, Cover main body; 211, Second mounting hole; 22, Connecting structure; 221, First mounting hole; 3, Sealing element; 4, First locking accessory; 41, Connecting rod; 42, First limiting structure; 43, Second limiting structure; 5, Second locking accessory; 20, Battery cell; 200, Controller; 300, Motor.

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

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0046] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0047] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0048] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0049] In related technologies, battery devices generally consist of a housing, a cover, and individual battery cells. The cover is connected to the housing, and the battery modules are housed within a closed cavity formed by the cover and the housing. In these technologies, a sealing gasket is placed between the cover and the housing, and mounting holes are provided on both the cover and the gasket for bolts to pass through and secure the connection. To avoid poor sealing at the bolt locations, a relatively wide sealing surface is required, resulting in a large space occupied by the housing. This affects the capacity of the individual battery cells and consequently, the overall volumetric energy density of the battery device.

[0050] Based on the above considerations, in order to solve the problem that the large space occupied by the housing 1 in the battery device 100 affects the volumetric energy density of the battery device 100, a battery device 100 is designed. The battery device 100 includes a battery cell 20 and a battery housing 10. The battery housing 10 includes a housing 1, a cover 2, a sealing element 3, and a first locking accessory 4. The housing 1 has a receiving cavity 111 for accommodating the battery cell 20, and the opening of the receiving cavity 111 has a sealing surface 15 on its periphery. The cover 2 includes a cover body 21 and a connecting structure 22. The connecting structure 22 is bent and connected to at least a part of the side of the cover body 21. The cover body 21 covers the opening of the receiving cavity 111 and the sealing surface 15. The connecting structure 22 is located on the side of the housing 1. The sealing element 3 is disposed between the sealing surface 15 and the cover body 21. The first locking accessory 4 passes through the connecting structure 22 and connects the connecting structure 22 to the side of the housing 1.

[0051] In this battery device 100, when the cover 2 is closed on the housing 1, the connecting structure 22 of the cover 2 is located on the side of the housing 1 and connected to the housing 1 through the first locking attachment 4. Therefore, there is no need to reserve bolt holes on the sealing surface 15 and the sealing element 3 on the periphery of the opening of the receiving cavity 111. This reduces the width of the sealing surface 15 and the sealing element 3, reduces the wall thickness of the housing 1, and allows more space in the battery device 100 to accommodate the battery cells 20, thereby improving the volumetric energy density of the battery device 100.

[0052] The battery device 100 in this application can be used as a power source or power system for an electrical device. A battery device refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. This is beneficial to improving the overall performance of the battery device 100 and facilitates the promotion of the battery device 100.

[0053] The aforementioned electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0054] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0055] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0056] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the 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 can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 20 is housed within the battery box 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed manner to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed manner to form a whole, which is then housed within the battery box 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0058] The battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0059] According to some embodiments of this application, refer to Figures 2 to 6 , Figure 2 and Figure 3 These are structural diagrams and partial enlarged views of a battery device 100 according to some embodiments of this application. Figure 4 This is an exploded view of a battery device 100 according to some embodiments of this application. Figure 5 and Figure 6 The present invention provides a cross-sectional view and a partial cross-sectional view of the battery case 10 in a battery device 100 according to some embodiments of the present application, along the Y direction.

[0060] As shown in the figure, the X direction 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 Figures 2 to 6 As shown, this application provides a battery device 100, which includes a battery cell 20 and a battery case 10. The battery case 10 includes a case body 1, a cover 2, a sealing element 3, and a first locking attachment 4. The case body 1 has a receiving cavity 111 for receiving the battery cell 20, and the opening of the receiving cavity 111 has a sealing surface 15 around its periphery. The cover 2 includes a cover body 21 and a connecting structure 22. The connecting structure 22 is bent and connected to at least a portion of the side of the cover body 21. The cover body 21 covers the opening of the receiving cavity 111 and the sealing surface 15. The connecting structure 22 is located on the side of the case body 1. The sealing element 3 is disposed between the sealing surface 15 and the cover body 21. The first locking attachment 4 passes through the connecting structure 22 and connects the connecting structure 22 to the side of the case body 1.

[0062] In this embodiment, the battery box 10 can be configured as a cuboid or other polygonal structure. The box body 1, as the main structure of the battery box 10, includes a base plate and side walls surrounding the base plate. The base plate and side walls enclose an opening in a receiving cavity 111. The opening of the receiving cavity 111 is opposite to the base plate along the height direction of the battery box 10. A sealing surface 15 is formed around the opening of the receiving cavity 111. Optionally, the side walls have a certain thickness, and the sealing surface 15 can be formed by the end face of the side wall away from the base plate. In some embodiments, a first flange 12 can be connected to the end of the side wall away from the base plate, and the sealing surface 15 is formed by the surface of the first flange 12 and the end face of the side wall. The sealing surface 15 is used to install a sealing element 3. The sealing surface 15 can be a plane, and in some embodiments, a groove can be provided on the sealing surface 15 to limit the sealing element 3. The sealing element 3 can be a sealing gasket made of rubber, felt, or other materials. The sealing element 3 can also be formed by curing sealant or the like.

[0063] The cover 2 refers to the component that covers the opening of the housing 1 to isolate the receiving cavity 111 from the external environment. The shape of the cover 2 can be adapted to the shape of the housing 1 to fit the housing 1. The cover 2 includes a cover body 21 and a connecting structure 22. The cover body 21 is adapted to the shape and contour of the end of the housing 1 away from the bottom plate. The connecting structure 22 is bent relative to the cover body 21. When the cover 2 is closed on the housing 1, the cover body 21 covers the opening of the receiving cavity 111 and covers the sealing element 3. The sealing element 3 can fill the gap between the cover body 21 and the sealing surface 15 to improve the sealing performance of the battery device 100.

[0064] The connecting structure 22 is disposed opposite to the side of the housing 1. The connecting structure 22 is provided with a first mounting hole 221 disposed opposite to the side of the housing 1. The side of the housing 1 is provided with a first connecting hole 16. The first locking accessory 4 passes through the first mounting hole 221 and the first connecting hole 16 to connect the connecting structure 22 to the housing 1, so that the housing 1 and the cover 2 are connected to each other. Optionally, the first connecting hole 16 can be disposed on the outer wall surface of the housing body 11 forming the receiving cavity 111, or in the following embodiment, the first connecting hole 16 can be disposed on the side flange 13 of the housing 1.

[0065] Optionally, the first locking accessory 4 can be a bolt, and the first connecting hole 16 can be a threaded hole. The first locking accessory 4 passes through the first mounting hole 221 and is threaded into the threaded hole, thereby connecting the connecting structure 22 to the housing 1. Alternatively, a side flange 13 can be provided on the housing 1, and both the first mounting hole 221 and the first connecting hole 16 can be through holes. A nut can be provided on the side of the side flange 13 facing away from the connecting structure 22, and the bolt and nut can be connected to clamp and fix the connecting structure 22 and the side flange 13 between the bolt head and the nut. Alternatively, the first locking accessory 4 can be a rivet, such as a pull-core rivet, and the connecting structure 22 and the side flange 13 can be connected by the rivet.

[0066] With this configuration, there is no need to provide bolt holes on the sealing surface 15 on the side where the connecting structure 22 is located, thereby reducing the size of the sealing surface 15 in its width direction; it can also reduce the wall thickness of the side wall of the housing 1 in the width direction of the sealing surface 15, reducing the space occupied by the housing 1 in this direction, allowing more space to be used to form the receiving cavity 111 to accommodate more battery cells 20 and improve the energy density of the battery device 100.

[0067] In this embodiment, the width direction of the sealing surface 15 is parallel to the plane direction of the sealing surface 15 and perpendicular to the boundary line between the sealing surface 15 and the opening of the receiving cavity 111.

[0068] Optionally, the connecting structure 22 can be arranged around the cover body 21, that is, each side of the cover 2 is connected and fitted to the housing 1 through the connecting structure 22. With this arrangement, the width of the sealing surface 15 at each point around the battery box 10 can be reduced, thereby significantly increasing the accommodating cavity 111.

[0069] Optionally, the connecting structure 22 can be provided only on a portion of the side of the cover 2. For example, to optimize the space design in the width direction to accommodate more battery cells 20, the connecting structure 22 can be provided on one or both sides of the cover 2 in the width direction. This reduces the width of the sealing surface 15 in the width direction of the battery box 10, thereby reducing the wall thickness of the side wall of the box 1 in the width direction and increasing the width of the receiving cavity 111. This allows for more battery cells 20 to be used, improving the volumetric energy density of the battery device 100. In this embodiment, bolts or other locking accessories can be used to pass through the cover body 21 on both sides of the battery box 10 in the length direction to connect the cover body 21 and the box 1, ensuring stable connection at all parts of the battery box 10 and improving the connection strength and sealing between the box 1 and the cover 2.

[0070] Please see Figure 7 According to some embodiments of this application, the box body 1 includes a box body 11, a first flange 12 and a side flange 13. The box body 11 is provided with a receiving cavity 111. The first flange 12 is connected to the outside of the opening of the receiving cavity 111 and is provided with at least a partial sealing surface 15. The side flange 13 is bent and connected to the first flange 12. The connecting structure 22 is arranged opposite to the side flange 13. The first locking accessory 4 connects the connecting structure 22 and the side flange 13.

[0071] In this embodiment, the main body 11 of the box has a receiving cavity 111 as its main structure. A first flange 12 is formed on the outer side of the opening of the receiving cavity 111. The outer edge of the first flange 12 is bent and connected to a side flange 13, which is disposed opposite to the outer side wall of the main body 11. By providing the side flange 13, the area on the side of the box 1 used for the connection of the first locking accessory 4 has sufficient thickness, avoiding a shallow connection depth between the first locking accessory 4 and the box 1, and improving the connection strength.

[0072] Optionally, the first locking accessory 4 can be a bolt. A screw hole can be directly provided on the side flange 13 as the first connecting hole 16 for securing the bolt. Alternatively, a riveting stud 19 can be fixed on the side flange 13, or a nut can be used to engage with the bolt. Alternatively, the first locking accessory 4 can be a rivet, with a clear hole on the side flange 13 serving as the first connecting hole 16, using the rivet to connect the connecting structure 22 and the side flange 13. That is, by providing the first flange 12, more connection methods can be provided between the connecting structure 22 and the housing 1, making the application more flexible.

[0073] Optionally, the first flange 12 and the side flange 13 can be formed by bending, or the first flange 12 and the side flange 13 can be integrally injection molded with the box body 11.

[0074] Please see Figure 7 In one embodiment, the side flange 13 is spaced apart from the side wall of the box body 11. The first lock accessory 4 includes a connecting rod 41, a first limiting structure 42 provided at one end of the connecting rod 41, and a second limiting structure 43 provided at the other end of the connecting rod 41. The connecting rod 41 passes through the connecting structure 22 and the side flange 13, and the connecting structure 22 and the side flange 13 are sandwiched between the first limiting structure 42 and the second limiting structure 43.

[0075] In this embodiment, both the first mounting hole 221 in the connecting structure 22 and the first mounting hole 221 in the side flange 13 can be made into smooth holes, simplifying the structure of the cover 2 and the box 1 and improving the ease of production of the cover 2 and the box 1. In specific applications, the connecting rod 41 of the first lock accessory 4 is passed through the first mounting hole 221 and the second mounting hole 211, so that the first limiting structure 42 abuts against the surface of the connecting structure 22 away from the side flange 13, and the second limiting structure 43 abuts against the surface of the side flange 13 away from the connecting structure 22, thereby connecting the connecting structure 22 and the side flange 13 between the first limiting structure 42 and the second limiting structure 43.

[0076] Optionally, the connecting rod 41 of the first lock accessory 4 can be configured as a screw, and the first limiting structure 42 and the second limiting structure 43 can be configured as nuts sleeved on the screw; or the first lock accessory 4 can be configured as a bolt and nut mating structure, with the first limiting structure 42 configured as the bolt head and the nut as the second limiting structure 43.

[0077] Please see Figure 7 In one embodiment, the first lock accessory 4 is configured as a rivet. In this design, the rivet head serves as the first limiting structure 42, and the end of the rivet away from the rivet head deforms to form a second limiting structure 43. The connection between the cover 2 and the box 1 is relatively convenient, which helps improve assembly efficiency; moreover, the rivet is less likely to fall off, ensuring a stable connection.

[0078] See also Figure 3 and Figure 4 In one embodiment, the first lock attachment 4 is configured as a bolt, which is threadedly connected to the housing 1.

[0079] This design provides a high connection strength between the housing 1 and the cover 2, and the bolts are removable, making maintenance of the battery device 100 convenient. Optionally, screw holes can be provided on the side wall of the housing 1 or on the side flange 13, or a nut can be provided on the side of the side flange 13 away from the connecting structure 22 for engagement with the bolts. The nut can also be fixed to the side flange 13, for example, as a press-fit nut fixed to the side flange 13.

[0080] See also Figure 5 and Figure 6 In one embodiment, the outer side wall of the housing 1 is provided with a clearance groove 17, and the connecting structure 22 is located in the clearance groove 17.

[0081] This design avoids the edge of the cover 2 protruding from the outer wall of the housing 1, which helps to increase the space of the receiving cavity 111, allowing the battery device 100 to accommodate more battery cells 20 and thus improving the volumetric energy density of the battery device 100. Furthermore, the edge of the cover 2 does not protrude from the outer wall of the housing 1, preventing interference with other components during battery device 100 installation.

[0082] Please see Figure 5 and Figure 7 According to some embodiments of this application, the cover 2 is provided with connecting structures 22 on at least two sides spaced apart along a first direction.

[0083] In this embodiment, the cover 2 is provided with connecting structures 22 on both sides spaced apart in the first direction. The two connecting structures 22 are arranged opposite to each other. When the cover 2 is closed on the housing 1, the two connecting structures 22 correspond one-to-one with the two side walls of the housing 1 that are facing away from each other. With this design, the width of the sealing surfaces 15 on both sides of the opening of the receiving cavity 111 in the first direction can be reduced, which can significantly reduce the wall thickness of the side walls of the housing 1 in the first direction, effectively saving space in the battery box 10 to accommodate more battery cells 20, which is beneficial to improving the volumetric energy density of the battery device 100. Optionally, the first direction is the width direction of the battery box 10 (e.g., the width direction of the battery box 10). Figure 2 The X direction in the equation can also be the length direction of the battery device 100 (e.g., the X direction in the equation). Figure 2 Y direction in ).

[0084] Optionally, connecting structures 22 can also be provided on other sides of the cover 2, or bolts or other locking accessories can be used to connect the cover body 21 and the box 1 in other edge areas of the cover 2. Connecting structures 22 are provided on at least one side of the two sides of the cover 2 spaced apart along the second direction, where the second direction intersects the first direction. For example, connecting structures 22 can be provided on both sides of the cover 2 spaced apart along the second direction, or connecting structures 22 can be provided on one side, and bolts or other locking accessories can be used on the other side to pass through the cover body 21 and the sealing surface 15 to connect the cover body 21 and the box 1.

[0085] According to some embodiments of this application, at least one of the two sides of the cover 2 that are spaced apart along the second direction is provided with a connecting structure 22.

[0086] In this embodiment, the first direction can be the width direction of the battery device 100 (e.g., the width direction of the battery device 100). Figure 2 The X direction is the first direction, and the second direction is the length direction of the battery device 100 (e.g., the X direction). Figure 2 (Y direction in the middle). Connection structures 22 can be provided on both sides of the cover 2 at intervals along the second direction, that is, the cover 2 is connected to the box 1 on both sides in the width direction and both sides in the length direction through the connection structures 22 located on the side of the box 1; or the connection structure 22 can be provided on one side, and bolts or other locking accessories are used to pass through the cover body 21 and the sealing surface 15 on the other side to connect the cover body 21 and the box 1; with this arrangement, the width of the sealing surface 15 can be reduced in both the length and width directions of the battery box 10, and the wall thickness of the box 1 in both the length and width directions can be reduced, so that the size of the receiving cavity 111 in both the length and width directions can be increased, which can accommodate more battery cells 20, which is beneficial to improving the volumetric energy density of the battery device 100.

[0087] Furthermore, when each side of the cover 2 is connected to the housing 1 via the connecting structure 22, it is not necessary to use bolts along the height direction (e.g., Figure 2 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. Thus, at the same design height, by reducing the space occupied by the bolt head, the size of the receiving cavity 111 in the height direction can be increased, which can accommodate taller battery cells 20 or accommodate more battery cells 20, thereby increasing the volumetric energy density of the battery device 100.

[0088] See also Figure 2 and Figure 3 According to some embodiments of this application, the two sides of the cover 2, which are spaced apart along the second direction, are connected to the box 1 by a second locking attachment 5. The second locking attachment 5 passes through the cover body 21 and the sealing surface 15, and the second direction intersects with the first direction.

[0089] In this embodiment, a second connecting hole 18 is provided on the sealing surface 15 located on the side of the opening of the receiving cavity 111 in the second direction, and a second mounting hole 211 is provided on the edge region of the cover body 21. A second locking attachment 5 is provided through the second mounting hole 211 and the second connecting hole 18 to connect the cover body 21 to the housing 1. Optionally, the side wall of the housing 1 can be made thicker so that the sealing surface 15 located on the side of the opening of the receiving cavity 111 in the second direction is wider, ensuring sufficient space for locking the second locking attachment 5 while maintaining the sealing performance on that side. Alternatively, a second flange 14 can be provided in the following embodiment to increase the width of the sealing surface 15, which is not limited here.

[0090] Optionally, one of the second connecting hole 18 and the second mounting hole 211 can be configured as a screw hole, and the second locking accessory 5 can be configured as a bolt. The second locking accessory 5 passes through the second connecting hole 18 and the second mounting hole 211 and is threadedly connected to the screw hole therein, thereby connecting the cover body 21 to the box body 1. Alternatively, both the second mounting hole 211 and the second connecting hole 18 can be configured as smooth holes, and nuts and bolts can be used for engagement. Alternatively, the second locking accessory 5 can be configured as a rivet, and the rivet is used to connect the cover body 21 and the second flange 14 of the box body 1. Connecting the cover body 21 to the box body 1 on both sides in the second direction using the second locking accessory 5 can improve the connection strength and sealing performance between the cover body 2 and the box body 1.

[0091] Please see Figure 3 In one embodiment, the housing 1 is provided with a second flange 14, which is located outside the opening of the receiving cavity 111 along a second direction, and the second locking attachment 5 connects the cover body 21 and the second flange 14.

[0092] In this embodiment, by expanding the size of the sealing surface 15 through the second flange 14, sufficient space is provided to lock the second locking accessory 5 while satisfying the sealing performance. This eliminates the need to make the side wall thickness of the receiving cavity 111 thicker, saving material for the housing 1. Optionally, a rivet can be used as the second locking accessory 5 to connect the second flange 14 and the cover body 21. Alternatively, a nut or a fixed rivet stud can be provided on the second flange 14, and the second locking accessory 5 can be configured as a bolt threadedly connected to the nut or rivet stud, thereby connecting the cover body 21 and the second flange 14.

[0093] This application also proposes a battery box 10, which includes a box body 1, a cover 2, a sealing element 3, and a first locking accessory 4. The box body 1 has a receiving cavity 111 for accommodating individual battery cells 20, and the opening of the receiving cavity 111 has a sealing surface 15 around its periphery. The cover 2 includes a cover body 21 and a connecting structure 22. The connecting structure 22 is bent and connected to at least a portion of the side of the cover body 21. The cover body 21 covers the opening of the receiving cavity 111 and the sealing surface 15. The connecting structure 22 is located on the side of the box body 1. The sealing element 3 is disposed between the sealing surface 15 and the cover body 21. The first locking accessory 4 passes through the connecting structure 22 and is connected to the box body 1.

[0094] In this configuration, when the cover 2 is closed onto the housing 1, the connecting structure 22 is located on the side of the housing 1 and connected to the housing 1 through the first locking attachment 4. This eliminates the need to reserve bolt holes on the sealing surface 15 and the sealing element 3, thereby reducing the width of the sealing surface 15 and thus reducing the wall thickness of the housing 1, providing more space to accommodate the battery cell 20, and improving the volumetric energy density of the battery device 100.

[0095] This application also proposes an electrical device that includes the battery device 100 in any of the foregoing embodiments. The specific structure of the battery device 100 in this embodiment refers to the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0096] Electrical devices can include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0097] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0098] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0099] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0100] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery device, characterized in that, It includes individual battery cells and a battery case, wherein the battery case includes: The housing has a cavity for accommodating the individual battery cells, and the opening of the cavity has a sealing surface on its periphery. A cover body, the cover body including a cover body and a connecting structure, the connecting structure being bent and connected to at least a portion of the side of the cover body, the cover body covering the opening of the receiving cavity and the sealing surface, and the connecting structure being located on the side of the box body; A sealing element, wherein the sealing element is disposed between the sealing surface and the cover body; and A first locking accessory is inserted through the connecting structure and connects the connecting structure to the side of the housing; The cover is provided with the connecting structure on both sides spaced apart along the first direction. The cover is connected to the box body on both sides spaced apart along the second direction through the second locking attachment. The second locking attachment passes through the cover body, the sealing element and the sealing surface. The second direction intersects with the first direction.

2. The battery device as claimed in claim 1, characterized in that, The box body includes a box body, a first flange and a side flange. The box body is provided with the receiving cavity. The first flange is connected to the outside of the opening of the receiving cavity and is provided with at least part of the sealing surface. The side flange is bent and connected to the first flange. The connecting structure is disposed opposite to the side flange, and the first lock accessory connects the connecting structure and the side flange.

3. The battery device as claimed in claim 2, characterized in that, The side flange is spaced apart from the side wall of the main body of the box. The first lock accessory includes a connecting rod, a first limiting structure at one end of the connecting rod, and a second limiting structure at the other end of the connecting rod. The connecting rod passes through the connecting structure and the side flange, and the connecting structure and the side flange are sandwiched between the first limiting structure and the second limiting structure.

4. The battery device as claimed in claim 3, characterized in that, The first lock accessory is a rivet.

5. The battery device as claimed in claim 1, characterized in that, The first lock accessory is a bolt, which is threadedly connected to the housing.

6. The battery device as claimed in claim 1, characterized in that, The outer wall of the housing is provided with a clearance groove, and the connecting structure is located in the clearance groove.

7. The battery device according to any one of claims 1 to 6, characterized in that, The connecting structure is provided on at least one of the two sides of the cover that are spaced apart along the second direction.

8. The battery device according to any one of claims 1 to 6, characterized in that, The box body is provided with a second flange, which is located outside the opening of the receiving cavity along the second direction, and the second locking attachment connects the cover body and the second flange.

9. A battery box, characterized in that, The battery box includes: The housing has a cavity for accommodating individual battery cells, and the opening of the cavity has a sealing surface on its periphery. A cover body, comprising a cover body and a connecting structure, wherein the connecting structure is bent and connected to at least a portion of the side of the cover body, the cover body covers the opening of the receiving cavity and the sealing surface, and the connecting structure is located on the side of the box body; A sealing element, wherein the sealing element is disposed between the sealing surface and the cover body; and A first locking accessory is inserted through the connecting structure and connected to the housing; The cover is provided with the connecting structure on both sides spaced apart along the first direction. The cover is connected to the box body on both sides spaced apart along the second direction through the second locking attachment. The second locking attachment passes through the cover body, the sealing element and the sealing surface. The second direction intersects with the first direction.

10. An electrical device, characterized in that, Includes the battery device as described in any one of claims 1 to 8.

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