Battery devices and electrical appliances

Abstract

This application discloses a battery device and an electrical device. The battery device includes: a first housing with a first receiving cavity formed inside, the first receiving cavity having a first opening in a first direction, and the first receiving cavity having a first wall and a second wall connected circumferentially to the first opening; a second housing with a second receiving cavity formed inside, the second receiving cavity having a second opening on the side facing the first housing in a first direction, and the second receiving cavity having a third wall and a fourth wall connected circumferentially to the second opening; a first reinforcing structure disposed at a corner of the first housing; and a second reinforcing structure disposed at a corner of the second housing, and in a first direction, the second reinforcing structure is arranged opposite to the first reinforcing structure. According to the battery device provided by this application, the structural strength at the corner of the entire housing can be improved, reducing the probability of airtightness failure at that location.

Description

Technical Field

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

[0002] When batteries are used in vehicles, the four corners of the battery box are the main mechanical load points and vibration transmission nodes. Stress concentration can easily lead to seal failure at these locations. To solve this problem, the current approach is to increase the overall thickness of the battery box to improve the structural strength of the entire box and thus enhance the stress resistance of the battery device. However, this approach increases the weight of the entire battery box. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a battery device that can achieve both lightweight design and reduced probability of hermetic failure.

[0004] This application also proposes an electrical device having the above-mentioned battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, comprising: a first housing, wherein a first receiving cavity is formed within the first housing, the first receiving cavity having a first opening in a first direction, the first receiving cavity having a first wall and a second wall connected circumferentially to the first opening, the first wall extending along a second direction, the second wall extending along a third direction, the first direction, the second direction, and the third direction intersecting each other; a second housing, the second housing disposed on one side of the first housing in the first direction and sealing the first opening, wherein a second receiving cavity is formed inside the second housing, the second receiving cavity having a second opening on the side of the first housing facing the first housing in the first direction, the second receiving cavity having a third wall and a fourth wall connected circumferentially to the second opening, the third wall extending along the second direction, the fourth wall extending along the third direction; a first reinforcing structure disposed at a corner position of the first housing; and a second reinforcing structure disposed at a corner position of the second housing, and in the first direction, the second reinforcing structure being arranged opposite to the first reinforcing structure.

[0006] In the above technical solution, by setting the first and second reinforcing structures, the structural strength of the entire box corner area can be improved, thereby increasing the load-bearing capacity of the area and effectively preventing the corner from becoming a weak point and failing preferentially under external impact or static load. At the same time, the first and second reinforcing structures can also increase the stress transmission path, guiding the load to be transmitted more effectively to the entire box frame, thereby increasing the stress load at that location, thus improving the deformation resistance of the entire box, reducing the probability of airtight failure of the battery device, and improving the reliability of the battery device. In addition, it can also reduce the overall weight of the entire box to a certain extent, thereby improving the lightweighting of the battery device.

[0007] In some embodiments, the first wall and the second wall are connected by a first arcuate wall extending along an arc, and at least a portion of the first reinforcing structure is connected to the first arcuate wall; and / or, the third wall and the fourth wall are connected by a second arcuate wall extending along an arc, and at least a portion of the second reinforcing structure is connected to the second arcuate wall.

[0008] In the above technical solution, by setting at least a portion of the first reinforcing structure to be connected to the first arc wall, the stress load and structural strength of the first housing at the corner position can be improved; by setting at least a portion of the second reinforcing structure to be connected to the second arc wall, the stress load and structural strength of the second housing at the corner position can be improved. At the same time, since the second reinforcing structure and the first reinforcing structure are arranged relative to each other, the stress load and structural strength of the entire housing at the corner position can be further improved, thereby improving the reliability of the entire battery device.

[0009] In some embodiments, the first reinforcing structure includes: a first reinforcing segment and a second reinforcing segment, the first reinforcing segment extending along a second direction and connected to a first wall, the second reinforcing segment connected to one end of the first reinforcing segment, the second reinforcing segment extending along an arcuate wall in an arc shape and connected to the arcuate wall; and / or, the second reinforcing structure includes: a third reinforcing segment and a fourth reinforcing segment, the third reinforcing segment extending along a second direction and connected to a third wall, the fourth reinforcing segment connected to one end of the third reinforcing segment, the fourth reinforcing segment extending along a second arcuate wall in an arc shape and connected to the second arcuate wall.

[0010] In the above technical solution, by setting the first reinforcing section and the second reinforcing section, the contact area between the first reinforcing structure and the inner wall of the first receiving cavity can be increased, thus facilitating load transfer; at the same time, the stress acting on the arc wall can be transferred through two paths, thereby improving the stress bearing capacity of the arc wall; by setting the third reinforcing section and the fourth reinforcing section, the contact area between the second reinforcing structure and the inner wall of the second receiving cavity can be increased, thus facilitating load transfer; at the same time, the stress acting on the second arc wall can be transferred through two paths, thereby improving the stress bearing capacity of the second arc wall.

[0011] In some embodiments, the first reinforcing structure is connected to the side surface of the first housing facing the first receiving cavity; and / or,

[0012] The second reinforcing structure is connected to the side surface of the second housing facing the second receiving cavity.

[0013] In the above technical solution, by setting a first reinforcing structure connected to the side surface of the first housing facing the first receiving cavity, the appearance of the first housing can be improved; by setting a second reinforcing structure connected to the side surface of the second housing facing the second receiving cavity, the appearance of the second housing can be improved.

[0014] In some embodiments, the first reinforcing structure includes: a first plate portion, the first plate portion being plate-shaped, one end of the first plate portion being connected to the inner wall surface of the first receiving cavity, and the other end extending toward the center of the first receiving cavity; and / or, the second reinforcing structure includes: a second plate portion, the second plate portion being plate-shaped, one end of the second plate portion being connected to the inner wall surface of the second receiving cavity, and the other end extending toward the center of the second receiving cavity.

[0015] In the above technical solution, by setting the first reinforcing structure to include a plate-shaped first plate portion, the overall structure of the first reinforcing structure can be simplified, thereby reducing the production cost of the entire first housing; by setting the second reinforcing structure to include a plate-shaped second plate portion, the overall structure of the second reinforcing structure can be simplified, thereby reducing the production cost of the entire second housing.

[0016] In some embodiments, the battery device further includes a first seal, which is sealingly connected between the first plate portion and the second plate portion.

[0017] In the above technical solution, by setting a first sealing element, the sealing performance of the corner area can be further improved, and the probability of sealing failure in this area can be reduced.

[0018] In some embodiments, the width of the first plate portion is greater than 2 mm in the direction from the periphery of the first housing towards the center of the first housing; and / or, the width of the second plate portion is greater than 2 mm in the direction from the periphery of the second housing towards the center of the second housing.

[0019] In the above technical solution, by setting the width of the first plate to be greater than 2mm, the structural strength of the first reinforcing structure can be further guaranteed, thereby further increasing the load at the corner of the first housing; by setting the width of the second plate to be greater than 2mm, the structural strength of the second reinforcing structure can be further guaranteed, thereby further increasing the load at the corner of the second housing.

[0020] In some embodiments, in a first direction, a first plate portion is arranged in a first housing near a first opening; and / or, in a first direction, a second plate portion is arranged in a second housing near a second opening.

[0021] In the above technical solution, by arranging the first plate near the first opening of the first housing, the probability of interference between the first plate and the battery cell can be effectively reduced, thereby improving the reliability of the battery device; by arranging the second plate near the second opening of the second housing, the probability of interference between the second plate and the battery cell can be effectively reduced, thereby improving the reliability of the battery device.

[0022] In some embodiments, the first reinforcing structure further includes: a third plate portion disposed within the first receiving cavity and extending along a first direction and connected to the inner wall surface of the first receiving cavity, one end of the first plate portion being connected to the end of the third plate portion facing the first opening in the first direction; and / or, the second reinforcing structure further includes: a fourth plate portion disposed within the second receiving cavity and extending along a first direction and connected to the inner wall surface of the second receiving cavity, one end of the third plate portion being connected to the end of the fourth plate portion facing the second opening in the first direction.

[0023] In the above technical solution, by setting the second plate, the connection stability between the first reinforcing structure and the first housing can be improved. At the same time, the supporting effect of the first reinforcing structure on the first housing can be further improved, thereby further improving the stress load at the corner of the first housing. By setting the fourth plate, the connection stability between the second reinforcing structure and the second housing can be improved. At the same time, the supporting effect of the second reinforcing structure on the second housing can be further improved, thereby further improving the stress load at the corner of the second housing.

[0024] In some embodiments, the first reinforcing structure further includes: a first bend, wherein the first plate portion is connected to the second plate portion via the first bend, and the first bend is formed as an arc surface protruding toward the periphery of the first opening; and / or, the second reinforcing structure further includes: a second bend, wherein the second plate portion is connected to the fourth plate portion via the second bend, and the second bend is formed as an arc surface protruding toward the periphery of the second opening.

[0025] In the above technical solution, by setting the first bend to form a circumferentially raised arc surface of the first opening, the risk of damage to the side wall of the first housing due to contact with the first reinforcing structure can be reduced; at the same time, stress concentration at the connection position of the first plate and the second plate can be reduced, thereby improving the reliability of the first reinforcing structure; by setting the second bend to form a circumferentially raised arc surface of the second opening, the risk of damage to the side wall of the second housing due to contact with the second reinforcing structure can be reduced; at the same time, stress concentration at the connection position of the second plate and the fourth plate can be reduced, thereby improving the reliability of the second reinforcing structure.

[0026] In some embodiments, the first bend and the inner wall surface of the first receiving cavity together define a first sealing groove, the first sealing groove being filled with sealant; and / or, the second bend and the inner wall surface of the second receiving cavity together define a second sealing groove, the second sealing groove being filled with sealant.

[0027] In the above technical solution, by setting the first bending portion and the inner wall surface of the first receiving cavity to jointly define the first sealing groove, and filling the first sealing groove with sealant, the structural strength at the connection position of the first wall and the second wall can be improved, as well as the sealing performance, deformation resistance and overall structural stability of the area can be improved. Similarly, by setting the second bending portion and the inner wall surface of the second receiving cavity to jointly define the second sealing groove, and filling the second sealing groove with sealant, the structural strength at the connection position of the third wall and the fourth wall can be improved, as well as the sealing performance, deformation resistance and overall structural stability of the area can be improved.

[0028] In some embodiments, at least a portion of the side surface of the third plate portion facing the wall of the first receiving cavity is formed as a first sealing area, and the first sealing area extends from one end of the third plate portion to the other end in the circumferential direction of the first opening, and the third plate portion is sealed to the inner wall surface of the first receiving cavity through the first sealing area; and / or, at least a portion of the side surface of the fourth plate portion facing the wall of the second receiving cavity is formed as a second sealing area, and the second sealing area extends from one end of the fourth plate portion to the other end in the circumferential direction of the second opening, and the fourth plate portion is sealed to the inner wall surface of the second receiving cavity through the second sealing area.

[0029] In the above technical solution, by setting a first sealing area, the connection stability between the second plate and the first receiving cavity can be further improved; by setting a second sealing area, the connection stability between the fourth plate and the second receiving cavity can be further improved.

[0030] In some embodiments, a first connecting portion extending toward the outside of the first receiving cavity is formed around the periphery of the first opening. The first connecting portion extends in an annular shape along the circumference of the first housing. The battery device further includes a second seal that extends in an annular shape along the circumference of the first opening and is sealed between the first connecting portion and the second housing.

[0031] In the above technical solution, by setting a second sealing element, a seal can be achieved between the first housing and the second housing, thereby improving the sealing performance of the battery device.

[0032] Secondly, embodiments of this application also provide an electrical device, including a battery device according to the first aspect of this application.

[0033] In the above technical solution, by setting the battery device of the first aspect embodiment, the overall performance of the power-consuming device is improved.

[0034] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a vehicle according to an embodiment of this application;

[0036] Figure 2 This is a schematic diagram of a battery device according to an embodiment of this application;

[0037] Figure 3 yes Figure 2 A schematic diagram of the first box shown;

[0038] Figure 4 yes Figure 3 Enlarged view of point A circled in the image;

[0039] Figure 5 yes Figure 3 A schematic diagram of the first box shown from another angle;

[0040] Figure 6 yes Figure 2 A schematic diagram of the second housing shown;

[0041] Figure 7 yes Figure 6 A schematic diagram of the second housing from another angle;

[0042] Figure 8 yes Figure 7 Enlarged view of point B circled in the image;

[0043] Figure 9 This is a schematic diagram of a battery device according to an embodiment of this application from another angle;

[0044] Figure 10 It is along Figure 9 The cross-sectional view of line AA shown;

[0045] Figure 11 yes Figure 10 The enlarged view of point C circled in the image.

[0046] Figure label:

[0047] 1000, vehicles;

[0048] 100. Battery device;

[0049] 10. First housing; 101. First receiving cavity; 11. First wall; 12. Second wall; 13. First arc-shaped wall;

[0050] 20. First reinforcing structure; 21. First reinforcing section; 22. Second reinforcing section; 23. First plate portion; 24. Third plate portion; 25. First bending portion; 26. First sealing groove; 27. First connecting portion;

[0051] 30. Second housing; 301. Second receiving cavity; 31. Third wall; 32. Fourth wall; 33. Second arc-shaped wall; 34. Third reinforcing section; 35. Fourth reinforcing section; 36. Second connecting part;

[0052] 40. Second reinforcing structure; 41. Second plate section; 42. Fourth plate section; 43. Second bending section; 44. Second sealing groove;

[0053] 50. Battery cell;

[0054] 200, controller; 300, motor. Detailed Implementation

[0055] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0057] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0058] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0060] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0061] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0062] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0063] 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 widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0064] When batteries are used in vehicles, the four corners of the battery box are the main mechanical load points and vibration transmission nodes. Stress concentration can easily lead to seal failure at these locations. To solve this problem, the current approach is to increase the overall thickness of the battery box to improve the structural strength of the entire box and thus enhance the stress resistance of the battery device. However, this approach increases the weight of the entire battery box.

[0065] Based on the above considerations, in order to solve the problems of easy airtightness failure at corner positions and increased weight of the housing, embodiments of this application provide a battery device. The battery device includes: a first housing, a second housing, a first reinforcing structure, and a second reinforcing structure. A first receiving cavity is formed inside the first housing, and a first opening is formed in the first direction. The first receiving cavity has a first wall and a second wall connected circumferentially to the first opening. The first wall extends along a second direction, and the second wall extends along a third direction. The first direction, the second direction, and the third direction intersect each other. The second housing is disposed on one side of the first housing in the first direction and covers the first opening. A second receiving cavity is formed inside the second housing, and a second opening is formed on the side of the second housing facing the first housing in the first direction. The second receiving cavity has a third wall and a fourth wall connected circumferentially to the second opening. The third wall extends along the second direction, and the fourth wall extends along the third direction. The first reinforcing structure is arranged at the corner position of the first housing. The second reinforcing structure is arranged at the corner position of the second housing, and in the first direction, the second reinforcing structure is arranged opposite to the first reinforcing structure. This approach enhances the structural strength at the corners of the enclosure, thereby increasing the load-bearing capacity of that area and effectively preventing corners from becoming weak points and failing preferentially under external impacts or static loads. Simultaneously, the first and second reinforcing structures increase stress transmission paths, guiding loads more effectively to the entire enclosure frame, thus increasing stress load at those locations. This improves the overall enclosure's resistance to deformation, reduces the probability of airtight failure of the battery unit, and enhances its reliability. Furthermore, since reinforcement is only applied to weak areas, the required plate thickness in certain areas of the enclosure can be reduced, thereby decreasing the overall weight of the enclosure and contributing to the lightweight design of the battery unit.

[0066] The battery device disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements. 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.

[0067] 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.

[0068] Reference Figure 1 , Figure 1This is a schematic diagram 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. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is disposed 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.

[0069] 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.

[0070] Reference Figure 2 , Figure 2 This is a schematic diagram of a battery device 100 according to some embodiments of this application. The battery device 100 includes a housing and a battery cell 50. The housing has a cavity, and the battery cell 50 is accommodated within the cavity of the housing. The housing provides a space for accommodating the battery cell 50, and the housing can have various structures. In some embodiments, the housing may include a first part (e.g., a first housing 10 as described below) and a second part (e.g., a second housing 30 as described below), the first housing 10 and the second housing 30 being connected to define a cavity for accommodating the battery cell 50. The first housing 10 may be a hollow structure with one end open, and the second housing 30 may be a plate-like structure, with the second housing 30 covering the open side of the first housing 10 to close the open side of the first housing 10; alternatively, both the first housing 10 and the second housing 30 may be hollow structures with one side open, with the open side of the first housing 10 covering the open side of the second housing 30. Of course, the box formed by the first box 10 and the second box 30 can be of various shapes, such as cylinder, cuboid, etc.

[0071] In the battery device 100, there can be multiple battery cells 50, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 50 are connected in both series and parallel configurations. Multiple battery cells 50 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 50 is housed within a casing. Alternatively, the battery device 100 can also consist of multiple battery cells 50 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within a casing. 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 50.

[0072] Each battery cell 50 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 50 can be cylindrical, flat, cuboid, or other shapes.

[0073] The following is for reference. Figures 2-11 A battery device 100 according to an embodiment of the first aspect of this application is described. Figure 2 This is a schematic diagram of a battery device 100 according to some embodiments of this application. Figure 3 yes Figure 2 A schematic diagram of the first housing 10 shown. Figure 4 yes Figure 3 The enlarged view of point A circled in the image. Figure 5 yes Figure 3 A schematic diagram of the first housing 10 shown from another angle. Figure 6 yes Figure 2 A schematic diagram of the second housing 30 shown. Figure 7 yes Figure 6 A schematic diagram of the second housing 30 from another angle, as shown. Figure 8 yes Figure 7 The enlarged view of point B circled in the image. Figure 9 This is a schematic diagram of a battery device 100 according to some embodiments of this application from another angle. Figure 10 It is along Figure 9 The cross-sectional view of line AA shown. Figure 11 yes Figure 10 The enlarged view of point C circled in the image.

[0074] Embodiments of this application provide a battery device 100, with reference to... Figure 2 and Figure 11 The battery device 100 includes: a first housing 10, a second housing 30, a first reinforcing structure 20, and a second reinforcing structure 40.

[0075] Reference Figure 3 and Figure 7A first receiving cavity 101 is formed inside the first housing 10. The first receiving cavity 101 has a first opening in a first direction. The first receiving cavity 101 has a first wall 11 and a second wall 12 connected in the circumferential direction of the first opening. The first wall 11 extends in a second direction, and the second wall 12 extends in a third direction. The first direction, the second direction, and the third direction intersect each other. A second housing 30 is disposed on one side of the first housing 10 in the first direction and covers the first opening. A second receiving cavity 301 is formed inside the second housing 30. The second receiving cavity 301 has a second opening on the side of the first housing 10 in the first direction. The second receiving cavity 301 has a third wall 31 and a fourth wall 32 connected in the circumferential direction of the second opening. The third wall 31 extends in the second direction, and the fourth wall 32 extends in the third direction.

[0076] Specifically, the first housing 10 and the second housing 30 together provide housing space and protection for the battery cell 50, thereby improving the reliability of the battery device 100. One of the first housing 10 and the second housing 30 is formed as the lower housing, and the other as the upper housing; their specific locations are not limited in this application.

[0077] The first receiving cavity 101 has a first wall 11 and a second wall 12 connected circumferentially to a first opening. Both the first wall 11 and the second wall 12 are side walls of the housing. For example, the first wall 11 can be the front or rear side wall of the first housing 10, and the second wall 12 can be the left or right side wall of the first housing 10. It should be noted that in this embodiment, the number of first walls 11 can be one or two, and the number of second walls 12 can also be one or two; no limitation is made here.

[0078] The phrase "the first direction, the second direction, and the third direction intersect each other" can be understood as meaning that the first direction, the second direction, and the third direction can be perpendicular to each other or arranged at an angle to each other; no limitation is made here.

[0079] The second receiving cavity 301 has a third wall 31 and a fourth wall 32 connected circumferentially to the second opening. The third wall 31 extends along a second direction, and the fourth wall 32 extends along a third direction. It can be understood that the third wall 31 can be correspondingly arranged with the first wall 11 in the first direction, or it can be arranged parallel to the first wall 11 in the projection plane in the first direction. For example, if the first wall 11 is the front side wall of the first receiving cavity 101, then the third wall 31 is the front side wall or the rear side wall of the second receiving cavity 301. Similarly, the positional relationship between the fourth wall 32 and the second wall 12 can be the same as the positional relationship between the first wall 11 and the third wall 31, which will not be elaborated here.

[0080] The first reinforcing structure 20 is arranged at the corner of the first housing 10. The corner of the first housing 10 is the location where the first wall 11 and the second wall 12 are connected. Therefore, the first reinforcing structure 20 is arranged at the corner of the first housing 10. It can be understood that the first reinforcing structure 20 can be connected to the first wall 11 and / or the second wall 12.

[0081] The second reinforcing structure 40 is arranged at the corner of the second housing 30, and in the first direction, the second reinforcing structure 40 is arranged opposite to the first reinforcing structure 20. It can be understood that the first reinforcing structure 20 and the second reinforcing structure 40 are arranged at the same corner of the entire housing, and are spaced apart along the first direction.

[0082] It should be noted that the corners of the housing are typically the main load input areas of the battery device 100, where the stress is relatively high. Therefore, placing the first reinforcing structure 20 at the corner of the first housing 10 and the second reinforcing structure 40 at the corner of the second housing 30 can improve the structural strength of the entire corner area, thereby increasing the load-bearing capacity of the area. This effectively prevents the corner from becoming a weak point and failing preferentially under external impact or static load. At the same time, the first reinforcing structure 20 and the second reinforcing structure 40 can also increase the stress transmission path, guiding the load to be transmitted more effectively to the entire housing frame, thereby increasing the stress load at that location. This improves the deformation resistance of the entire first housing 10, reduces the probability of airtight failure of the battery device 100, and enhances the reliability of the battery device 100.

[0083] Furthermore, in existing technologies, increasing the wall thickness is generally used to improve the structural strength and deformation resistance of the housing, resulting in a significant increase in the overall weight of the housing. In this embodiment, reinforcement is only applied to weak areas. This allows for the reduction of the required plate thickness in certain areas of the first housing 10, or the reduction of supporting structures, while ensuring the load-bearing capacity of the first housing 10. Consequently, the first housing 10 can meet stress load and structural strength requirements while reducing its overall weight, thus improving the lightweight design of the battery device 100. It should be noted that the design can be performed using SAE simulation.

[0084] Optionally, the first reinforcing structure 20 and the first housing 10 can be separate structures or integrally formed structures, and the second reinforcing structure 40 and the second housing 30 can be separate structures or integrally formed structures. For example, when both the first housing 10 and the second housing 30 are made by stamping, the first reinforcing structure 20 and the second reinforcing structure 40 can be made of sheet metal and then fixed to the first housing 10 and the second housing 30 respectively. When the first housing 10 and the second housing 30 form a frame structure, the first reinforcing structure 20 and the second housing 30 can be integrally formed with the frame. The specific structural form can be designed according to the actual situation and is not limited here.

[0085] It should be noted that the first reinforcing structure 20 can be arranged inside the first receiving cavity 101 or on the outer wall, and the second reinforcing structure 40 can be arranged inside the second receiving cavity 301 or on the outer wall of the second receiving cavity 301. No limitation is made here.

[0086] In the above technical solution, by setting the first reinforcing structure 20 and the second reinforcing structure 40, the structural strength of the entire box corner area can be improved, thereby increasing the load-bearing capacity of the area and effectively preventing the corner from becoming a weak point and failing preferentially under external impact or static load. At the same time, the first reinforcing structure 20 and the second reinforcing structure 40 can also increase the stress transmission path, guiding the load to be transmitted more effectively to the entire box frame, thereby increasing the stress load at that location, thus improving the deformation resistance of the entire box, reducing the probability of airtight failure of the battery device 100, and improving the reliability of the battery device 100. In addition, it can also reduce the overall weight of the entire box to a certain extent, thereby improving the lightweighting of the battery device 100.

[0087] In some embodiments, refer to Figure 3 and Figure 4 The first wall 11 and the second wall 12 are connected by a first arc wall 13 extending along an arc, and at least a portion of the first reinforcing structure 20 is connected to the first arc wall 13.

[0088] The first wall 11 and the second wall 12 are two adjacent side walls. Therefore, the statement "the first wall 11 and the second wall 12 are connected by a first arc wall 13 extending along an arc" can be understood as the connection between the first wall 11 and the second wall 12 being a circular arc transition. Specifically, a circular arc transition can more effectively disperse stress than a right-angle transition, thereby further reducing stress concentration at corner positions and improving the bending and torsional resistance of the entire first housing 10 structure. At the same time, when the battery device 100 is subjected to collision or compression, the circular arc structure has better energy absorption capacity, thereby delaying structural failure and protecting the internal battery cells 50.

[0089] The phrase "at least a portion of the first reinforcing structure 20 is connected to the first arc-shaped wall 13" can be understood to mean that the first reinforcing structure 20 can be partially or completely connected to the first arc-shaped wall 13. In other words, at least a portion of the first reinforcing structure 20 is located at the transition point between the first wall 11 and the second wall 12, i.e., at the corner. When the battery device 100 is assembled onto the vehicle 1000, the corner is the main load input area of ​​the battery device 100, where the stress is relatively high. Therefore, connecting at least a portion of the first reinforcing structure 20 to the first arc-shaped wall 13 can improve the structural strength of this area, increase the stress transmission path, and thus increase the stress load at the corner. This allows for a reduction in the thickness of the sheet metal required in certain areas of the first housing 10, or a reduction in the supporting structure, enabling the first housing 10 to meet stress load and structural strength requirements while also reducing its overall weight, thereby improving the lightweight design of the battery device 100.

[0090] In some embodiments, refer to Figures 6-8 The third wall 31 and the fourth wall 32 are connected by an arc wall extending along an arc, and at least a portion of the second reinforcing structure 40 is connected to the second arc wall 33.

[0091] The third wall 31 and the fourth wall 32 are two adjacent side walls. Therefore, the statement "the third wall 31 and the fourth wall 32 are connected by a second arc-shaped wall 33 extending along an arc" can be understood as the connection between the third wall 31 and the fourth wall 32 being a circular arc transition. Specifically, a circular arc transition can more effectively disperse stress than a right-angle transition, thereby further reducing stress concentration at corner positions and improving the bending and torsional resistance of the entire second housing 30 structure. Simultaneously, in the event of a collision or compression of the battery device 100, the circular arc structure has better energy absorption capacity, thus delaying structural failure and protecting the internal battery cells 50.

[0092] The phrase "at least a portion of the second reinforcing structure 40 is connected to the second arcuate wall 33" can be understood to mean that the second reinforcing structure 40 can be partially or fully connected to the second arcuate wall 33. In other words, at least a portion of the second reinforcing structure 40 is located at the transition point between the third wall 31 and the fourth wall 32, i.e., at the corner. When the battery device 100 is mounted on a vehicle, the corner is the main load input area of ​​the battery device 100, where the stress is relatively high. Therefore, connecting at least a portion of the second reinforcing structure 40 to the second arcuate wall 33 can improve the structural strength of this area, increase the stress transmission path, and thus increase the stress load at the corner. This allows for a reduction in the thickness of the sheet metal required in certain areas of the second housing 30, or a reduction in the supporting structure. Consequently, the second housing 30 can meet stress load and structural strength requirements while reducing its overall weight, thereby improving the lightweight design of the battery device 100. In the above technical solution, by setting at least a portion of the first reinforcing structure 20 to be connected to the first arc wall 13, the stress load and structural strength of the first housing 10 at the corner position can be improved; by setting at least a portion of the second reinforcing structure 40 to be connected to the second arc wall 33, the stress load and structural strength of the second housing 30 at the corner position can be improved. At the same time, since the second reinforcing structure 40 and the first reinforcing structure 20 are arranged opposite to each other, the stress load and structural strength of the entire housing corner position can be further improved, thereby improving the reliability of the entire battery device 100.

[0093] In some embodiments, refer to Figure 4 The first reinforcing structure 20 includes: a first reinforcing segment 21 and a second reinforcing segment 22. The first reinforcing segment 21 extends along a second direction and is connected to the first wall 11. The second reinforcing segment 22 is connected to one end of the first reinforcing segment 21. The second reinforcing segment 22 extends along the first arc wall 13 in an arc shape and is connected to the first arc wall 13.

[0094] It is understandable that the first reinforcing section 21 extends in the same direction as the first wall 11, and the second reinforcing section 22 extends in the same direction as the first arc wall 13. This allows the first reinforcing structure 20 to fit more closely to the first housing 10, making the first reinforcing structure 20 and the inner wall of the first receiving cavity 101 in surface or line contact. This increases the contact area between the first reinforcing structure 20 and the inner wall of the first receiving cavity 101, thus facilitating load transfer. At the same time, the first reinforcing section 21 is connected to the first wall 11, and the second reinforcing section 22 is connected to the first arc wall 13, allowing the stress acting on the first arc wall 13 to be transferred through two paths, thereby improving the stress bearing capacity of the first arc wall 13.

[0095] In the above technical solution, by setting the first reinforcing section 21 and the second reinforcing section 22, the contact area between the first reinforcing structure 20 and the inner wall of the first receiving cavity 101 can be increased, which is more conducive to load transfer; at the same time, the stress acting on the first arc wall 13 can be transferred through two paths, thereby improving the stress bearing capacity of the first arc wall 13.

[0096] In some embodiments, refer to Figure 8 The second reinforcing structure 40 includes a third reinforcing section 34 and a fourth reinforcing section 35. The third reinforcing section 34 extends along the second direction and is connected to the third wall 31. The fourth reinforcing section 35 is connected to one end of the third reinforcing section 34. The fourth reinforcing section 35 extends along the second arc wall 33 in an arc shape and is connected to the second arc wall 33.

[0097] It is understandable that the third reinforcing section 34 extends in the same direction as the third wall 31, and the fourth reinforcing section 35 extends in the same direction as the second arc wall 33. This allows the third reinforcing structure to fit more closely to the second housing 30, and the second reinforcing structure 40 to have surface or line contact with the inner wall of the second receiving cavity 301. This increases the contact area between the second reinforcing structure 40 and the inner wall of the second receiving cavity 301, thus facilitating load transfer. At the same time, the connection between the third reinforcing section 34 and the third wall 31, and the connection between the fourth reinforcing section 35 and the second arc wall 33, allows the stress acting on the second arc wall 33 to be transferred through two paths, thereby improving the stress bearing capacity of the second arc wall 33.

[0098] In the above technical solution, by setting the third reinforcing section 34 and the fourth reinforcing section 35, the contact area between the second reinforcing structure 40 and the inner wall of the second receiving cavity 301 can be increased, which is more conducive to load transfer; at the same time, the stress acting on the second arc wall 33 can be transferred through two paths, thereby improving the stress bearing capacity of the second arc wall 33.

[0099] In some embodiments, refer to Figures 3-4 The first reinforcing structure 20 is connected to the side surface of the first housing 10 facing the first receiving cavity 101.

[0100] In the above technical solution, by setting a first reinforcing structure 20 connected to the side surface of the first housing 10 facing the first receiving cavity 101, the appearance of the first housing 10 can be improved.

[0101] In some embodiments, refer to Figures 7-8 The second reinforcing structure 40 is connected to the side surface of the second housing 30 facing the second receiving cavity 301.

[0102] In the above technical solution, by setting a second reinforcing structure 40 connected to the side surface of the second housing 30 facing the second receiving cavity 301, the appearance of the second housing 30 can be improved.

[0103] In some embodiments, refer to Figure 11 The first reinforcing structure 20 includes: a first plate portion 23, which is formed in the shape of a plate. One end of the first plate portion 23 is connected to the inner wall surface of the first receiving cavity 101, and the other end extends toward the middle of the first receiving cavity 101.

[0104] Among them, the plate-shaped structure is relatively simple. Therefore, setting the first plate part 23 to be plate-shaped can reduce the manufacturing difficulty of the first reinforcing structure 20, thereby reducing the production cost of the first reinforcing structure 20. At the same time, since the other end is a free end, which means that the free end is not directly fixed, it can deform to a certain extent when subjected to impact or load, thereby absorbing some energy and playing a buffering role, thereby further reducing stress concentration.

[0105] In the above technical solution, by setting the first reinforcing structure 20 to include a plate-shaped first plate portion 23, the overall structure of the first reinforcing structure 20 can be simplified, thereby reducing the production cost of the entire first housing 10.

[0106] In some embodiments, refer to Figure 11 The second reinforcing structure 40 includes a second plate portion 41, which is formed in the shape of a plate. One end of the second plate portion 41 is connected to the inner wall surface of the second receiving cavity 301, and the other end extends toward the middle of the second receiving cavity 301.

[0107] Among them, the plate-shaped structure is relatively simple. Therefore, setting the second plate portion 41 to be flat can reduce the manufacturing difficulty of the second reinforcing structure 40, thereby reducing the production cost of the second reinforcing structure 40. At the same time, the other end of the second plate portion 41 extends toward the middle of the second receiving cavity 301. It can be understood that the other end of the second plate portion 41 is a free end. The free end refers to the end that is not directly fixed. It can deform to a certain extent when subjected to impact or load, thereby absorbing some energy and playing a buffering role, thereby further reducing stress concentration.

[0108] In the above technical solution, by setting the second reinforcing structure 40 to include a plate-shaped second plate portion 41, the overall structure of the second reinforcing structure 40 can be simplified, thereby reducing the production cost of the entire second housing 30.

[0109] In some embodiments, the battery device 100 further includes a first seal, which is sealed between the first plate portion 23 and the second plate portion 41.

[0110] It is understandable that in this embodiment, a second seal is provided between the first plate portion 23 and the second plate portion 41, on the premise that the first housing 10 and the second housing 30 have a first full seal. The arrangement of the first plate portion 23 and the second plate portion 41 is in the main load-bearing area of ​​the structure, and also a critical location where airtightness is prone to failure. Therefore, providing a second seal at this location can enhance the sealing performance of this area and reduce the probability of seal failure in this area; at the same time, compared with a full seal, partially increasing the first sealing area can also reduce the increase in weight and reduce the loss of volume utilization within the housing.

[0111] It should be noted that the first sealing element can be a sealing strip, sealant, or other liquid sealant; there are no restrictions here.

[0112] For example, the first plate portion 23 is arranged on the side of the first opening facing the bottom wall of the first receiving cavity 101, and the second plate portion 41 is arranged on the side of the second opening facing the bottom wall of the second receiving cavity 301. That is, the first plate portion 23 and the first opening form a stepped surface, and the second plate portion 41 and the second opening also form a stepped surface. In this way, the reliability of the second seal installation can be improved.

[0113] In the above technical solution, by setting a first sealing element, the sealing performance of the corner area can be further improved, and the probability of sealing failure in this area can be reduced.

[0114] In some embodiments, refer to Figure 11 In the direction from the periphery of the first housing 10 toward the center of the first housing 10, the width d of the first plate portion 23 is greater than 2 mm.

[0115] For example, the width of the first plate portion 23 can be 3mm, 4mm, 5mm or more.

[0116] In the above technical solution, by setting the width of the first plate 23 to be greater than 2mm, the structural strength of the first reinforcing structure 20 can be further guaranteed, thereby further increasing the load at the corner of the first housing 10.

[0117] In some embodiments, refer to Figure 11 In the direction from the periphery of the second housing 30 toward the center of the second housing 30, the width of the second plate portion 41 is greater than 2 mm.

[0118] For example, the width of the second plate portion 41 can be 3mm, 4mm, 5mm or more.

[0119] In the above technical solution, by setting the width of the second plate 41 to be greater than 2mm, the structural strength of the second reinforcing structure 40 can be further guaranteed, thereby further increasing the load at the corner position of the second housing 30.

[0120] In some embodiments, refer to Figure 11 In the first direction, the first plate portion 23 is arranged in the first housing 10 near the first opening.

[0121] It should be noted that the first plate portion 23 can be arranged on the side of the first opening facing the bottom wall of the first receiving cavity 101, or it can be arranged on the side of the first opening away from the bottom wall of the first receiving cavity 101; there is no limitation here.

[0122] In the above technical solution, by arranging the first plate 23 near the first opening of the first housing 10, the probability of interference between the first plate 23 and the battery cell 50 can be effectively reduced, thereby improving the reliability of the battery device 100.

[0123] In some embodiments, refer to Figure 11 In the first direction, the second plate portion 41 is arranged in the second housing 30 near the second opening.

[0124] It should be noted that the second plate portion 41 can be arranged on the side of the second opening facing the bottom wall of the second receiving cavity 301, or it can be arranged on the side of the second opening away from the bottom wall of the second receiving cavity 301; there is no limitation here.

[0125] In the above technical solution, by arranging the second plate portion 41 near the second opening of the second housing 30, the probability of interference between the second plate portion 41 and the battery cell 50 can be effectively reduced, thereby improving the reliability of the battery device 100.

[0126] In some embodiments, refer to Figure 11 The first reinforcing structure 20 further includes a third plate portion 24, which is disposed in the first receiving cavity 101 and extends along the first direction and is connected to the inner wall surface of the first receiving cavity 101. One end of the first plate portion 23 is connected to the end of the third plate portion 24 facing the first opening in the first direction.

[0127] It is understandable that the third plate portion 24 is in close contact with the inner wall surface of the first receiving cavity 101, that is, the third plate portion 24 and the inner wall surface of the first receiving cavity 101 are in surface contact. This can increase the contact area between the first reinforcing structure 20 and the first housing 10, thereby improving the connection stability between the first reinforcing structure 20 and the first housing 10. At the same time, it can further enhance the supporting effect of the first reinforcing structure 20 on the first housing 10, thereby further increasing the stress load at the corner position of the first housing 10.

[0128] For example Figure 11As shown, the first plate portion 23 and the third plate portion 24 are connected to form an "L" shape. The third plate portion 24 is connected to the inner wall surface of the first receiving cavity 101. One end of the first plate portion 23 is connected to the third plate portion 24, and the other end extends toward the middle of the first receiving cavity 101.

[0129] In the above technical solution, by setting the third plate 24, the connection stability between the first reinforcing structure 20 and the first housing 10 can be improved. At the same time, the supporting effect of the first reinforcing structure 20 on the first housing 10 can be further improved, thereby further improving the stress load at the corner of the first housing 10.

[0130] In some embodiments, refer to Figure 11 The second reinforcing structure 40 further includes: a fourth plate portion 42, which is disposed in the second receiving cavity 301 and extends along the first direction and is connected to the inner wall surface of the second receiving cavity 301; one end of the third plate portion 24 is connected to the end of the fourth plate portion 42 facing the second opening in the first direction.

[0131] It is understandable that the fourth plate portion 42 is in close contact with the inner wall surface of the second receiving cavity 301, that is, the fourth plate portion 42 and the inner wall surface of the second receiving cavity 301 are in surface contact. This can increase the contact area between the second reinforcing structure 40 and the second housing 30, thereby improving the connection stability between the second reinforcing structure 40 and the second housing 30. At the same time, it can further enhance the supporting effect of the second reinforcing structure 40 on the first housing 10, thereby further increasing the stress load at the corner position of the first housing 10.

[0132] For example Figure 11 As shown, the second plate portion 41 and the fourth plate portion 42 are connected to form an "L" shape. The fourth plate portion 42 is connected to the inner wall surface of the second receiving cavity 301. One end of the second plate portion 41 is connected to the fourth plate portion 42, and the other end extends toward the middle of the second receiving cavity 301.

[0133] In the above technical solution, by setting the fourth plate 42, the connection stability between the second reinforcing structure 40 and the second housing 30 can be improved. At the same time, the supporting effect of the second reinforcing structure 40 on the second housing 30 can be further improved, thereby further improving the stress load at the corner position of the second housing 30.

[0134] In some embodiments, refer to Figure 11 The first reinforcing structure 20 also includes a first bending portion 25, the first plate portion 23 is connected to the third plate portion 24 through the first bending portion 25, and the first bending portion 25 is formed as an arc surface that protrudes around the periphery toward the first opening.

[0135] It can be understood that one side of the first bending portion 25 is formed as an arc surface relative to the inner wall surface of the first accommodating cavity 101. In this way, the risk of damage to the side wall of the first box body 10 due to contact with the first strengthening structure 20 can be reduced; at the same time, the stress concentration at the connection position between the first plate portion 23 and the third plate portion 24 can also be reduced, thereby improving the reliability of the first strengthening structure 20.

[0136] Optionally, the first strengthening structure 20 includes various types. For example, it can be a plate-shaped material piece, or a material piece with a "mouth" - shaped or "day" - shaped cross - section. In this way, the structural strength of the first strengthening structure 20 can be effectively improved, and then the stress - bearing capacity of the first box body 10 can be improved. Among them, the material of the first strengthening structure 20 can be various, such as sheet metal, aluminum profile, composite material, etc., which is specifically selected according to the actual situation and is not limited here.

[0137] Optionally, the first strengthening structure 20 further includes: a plurality of reinforcing ribs. The plurality of reinforcing ribs are provided on the first strengthening structure 20 or connected between the first strengthening structure 20 and the first box body 10. In this way, while improving the structural strength of the first strengthening structure 20, the connection stability between the first strengthening structure 20 and the first box body 10 can also be improved.

[0138] In the above - mentioned technical solution, by setting the first bending portion 25 to form an arc surface that is a peripheral protrusion of the first opening, the risk of damage to the side wall of the first box body 10 due to contact with the first strengthening structure 20 can be reduced; at the same time, the stress concentration at the connection position between the first plate portion 23 and the third plate portion 24 can also be reduced, thereby improving the reliability of the first strengthening structure 20.

[0139] In some embodiments, referring to Figure 11 , the second strengthening structure 40 further includes: a second bending portion 43. The second plate portion 41 is connected to the fourth plate portion 42 through the second bending portion 43, and the second bending portion 43 is formed as an arc surface that is a peripheral protrusion towards the second opening.

[0140] It can be understood that one side of the second bending portion 43 is formed as an arc surface relative to the inner wall surface of the second accommodating cavity 301. In this way, the risk of damage to the side wall of the second box body 30 due to contact with the second strengthening structure 40 can be reduced; at the same time, the stress concentration at the connection position between the third plate portion 24 and the third plate portion 24 can also be reduced, thereby improving the reliability of the second strengthening structure 40.

[0141] In the above technical solution, by setting the second bending portion 43 to form a circumferentially raised arc surface of the second opening, the risk of damage to the side wall of the second housing 30 due to contact with the second reinforcing structure 40 can be reduced; at the same time, the stress concentration at the connection position of the second plate portion 41 and the fourth plate portion 42 can be reduced, thereby improving the reliability of the second reinforcing structure 40.

[0142] In some embodiments, refer to Figure 11 The first bend 25 and the inner wall of the first receiving cavity 101 together define the first sealing groove 26, which is filled with sealant.

[0143] The sealant can be excess sealant used to seal the first opening of the first housing 10, or it can be a different type of sealant. When the sealant is excess sealant, the first sealing groove 26 primarily serves to prevent excess sealant from entering the first receiving cavity 101 and affecting the battery cell 50. When the sealant is a different type of sealant, it can be understood that in addition to the first seal sealing the first opening, a second seal is filled in the first sealing groove 26. The first sealing groove 26 is located at the connection between the first wall 11 and the second wall 12, which is the main load-bearing area of ​​the structure and a critical location where airtightness is prone to failure. Therefore, filling the first sealing groove 26 with sealant not only enhances the sealing performance of this area but also improves its resistance to deformation and the overall structural stability.

[0144] Furthermore, since the first bend 25 is formed as an arc surface protruding from the periphery towards the first opening, the first sealing groove 26 is formed as a groove with a cross-section similar to a "triangle". Thus, when the sealant is filled into the first sealing groove 26, a solid structure with a cross-section similar to a "triangle" is formed here. At this time, when the battery device 100 is subjected to external loads at critical parts such as corners, the sealing structure with a triangular cross-section can guide and disperse the stress path, thereby effectively reducing stress concentration at this part and thus effectively reducing the risk of damage to this part. At the same time, the sealant can also improve the structural strength of this part to a certain extent, thereby further improving the load-bearing capacity and fatigue resistance of this area.

[0145] In the above technical solution, the first sealing groove 26 is defined by the first bending part 25 and the inner wall surface of the first receiving cavity 101. The first sealing groove 26 is filled with sealant, which can improve the structural strength at the connection position of the first wall 11 and the second wall 12, as well as improve the sealing performance, deformation resistance and overall structural stability of the area.

[0146] In some embodiments, refer to Figure 11The second bend 43 and the inner wall of the second receiving cavity 301 together define the second sealing groove 44, which is filled with sealant.

[0147] The sealant can be excess sealant used to seal the second opening of the second housing 30, or it can be a different sealant. When the sealant is excess sealant, the second sealing groove 44 primarily serves to prevent excess sealant from entering the second receiving cavity 301 and affecting the battery cell 50. When the sealant is a different sealant, it can be understood that in addition to the second seal sealing the second opening, a second seal is filled in the second sealing groove 44. The second sealing groove 44 is located at the connection between the third wall 31 and the fourth wall 32, which is the main load-bearing area of ​​the structure and a critical location where airtightness is prone to failure. Therefore, filling the second sealing groove 44 with sealant not only enhances the sealing performance of this area but also improves its deformation resistance and overall structural stability.

[0148] Furthermore, since the second bend 43 is formed as an arc surface protruding from the periphery towards the second opening, the second sealing groove 44 is formed as a groove with a cross-section similar to a "triangle". Thus, when the sealant is filled into the second sealing groove 44, a solid structure with a cross-section similar to a "triangle" is formed here. At this time, when the battery device 100 is subjected to external loads at critical parts such as corners, the sealing structure with a triangular cross-section can guide and disperse the stress path, thereby effectively reducing stress concentration at this part and thus effectively reducing the risk of damage to this part. At the same time, the sealant can also improve the structural strength of this part to a certain extent, thereby further improving the load-bearing capacity and fatigue resistance of this area.

[0149] Optionally, the second sealing groove 44 is connected to the first sealing groove 26. In this way, filling the first sealing groove 26 and the second sealing groove 44 with sealant can form a third seal, which can further improve the sealing reliability of the battery device 100 at the corner of the box and further reduce the possibility of airtight failure of the battery device 100.

[0150] In the above technical solution, the second sealing groove 44 is defined by the second bending part 43 and the inner wall surface of the second receiving cavity 301. The second sealing groove 44 is filled with sealant, which can improve the structural strength at the connection position of the third wall 31 and the fourth wall 32, as well as improve the sealing performance, deformation resistance and overall structural stability of the area.

[0151] In some embodiments, at least a portion of the side surface of the third plate portion 24 facing the wall of the first receiving cavity 101 is formed as a first sealing area. In the circumferential direction of the first opening, the first sealing area extends from one end of the third plate portion 24 to the other end, and the third plate portion 24 is sealed to the inner wall surface of the first receiving cavity 101 through the first sealing area.

[0152] The phrase "at least a portion of the side surface of the third plate portion 24 facing the wall of the first receiving cavity 101 is formed as a first sealing area" can be understood to mean that the side surface of the third plate portion 24 facing the wall of the first receiving cavity 101 can be partially formed as a first sealing area, or it can be entirely formed as a first sealing area.

[0153] The phrase “the first sealing area extends from one end of the third plate portion 24 to the other end in the circumferential direction of the first opening” is intended to indicate that the first sealing area extends through the entire third plate portion 24 in the circumferential direction of the first opening, that is, the third plate portion 24 is completely sealed to the inner wall of the first receiving cavity 101 in the circumferential direction of the first opening.

[0154] It should be noted that the first sealing area and the inner wall of the first receiving cavity 101 can be sealed by spot welding and then by spot welding adhesive; or they can be sealed by full welding. There is no restriction here.

[0155] In the above technical solution, by setting a first sealing area, the connection stability between the third plate 24 and the first receiving cavity 101 can be further improved.

[0156] In some embodiments, at least a portion of the side surface of the fourth plate portion 42 facing the wall of the second receiving cavity 301 is formed as a first sealing area. In the circumferential direction of the second opening, the first sealing area extends from one end of the fourth plate portion 42 to the other end, and the fourth plate portion 42 is sealed to the inner wall surface of the second receiving cavity 301 through the first sealing area.

[0157] The phrase "at least a portion of the side surface of the fourth plate portion 42 facing the wall of the second receiving cavity 301 is formed as a second sealing area" can be understood to mean that the side surface of the fourth plate portion 42 facing the wall of the second receiving cavity 301 can be partially formed as a second sealing area, or it can be entirely formed as a second sealing area.

[0158] The phrase "in the circumferential direction of the second opening, the second sealing area extends from one end of the fourth plate portion 42 to the other end" is intended to indicate that, in the circumferential direction of the second opening, the second sealing area extends through the entire fourth plate portion 42, that is, in the circumferential direction of the second opening, the fourth plate portion 42 is completely sealed to the inner wall of the second receiving cavity 301.

[0159] It should be noted that the second sealing area and the inner wall of the second receiving cavity 301 can be sealed by spot welding and then by spot welding adhesive; or they can be sealed by full welding. There is no restriction here.

[0160] In the above technical solution, by setting a second sealing area, the connection stability between the fourth plate 42 and the second receiving cavity 301 can be further improved.

[0161] In some embodiments, refer to Figure 11 The periphery of the first opening is formed with a first connecting portion 27 extending toward the outside of the first receiving cavity 101. The first connecting portion 27 extends in an annular shape along the circumference of the first housing 10. The battery device 100 also includes a second sealing member, which extends in an annular shape along the circumference of the first opening and is sealed between the first connecting portion 27 and the second housing 30.

[0162] It should be noted that the second sealing element can be a sealing strip, sealant, or other liquid sealant; there are no restrictions here.

[0163] Optionally, the periphery of the second opening is formed with a second connecting portion 36 extending toward the outside of the second receiving cavity 301. The second connecting portion 36 extends in an annular shape along the periphery of the second housing 30, and the second seal seals against the space between the first connecting portion 27 and the second connecting portion 36.

[0164] In the above technical solution, by setting a second sealing element, the sealing between the first housing 10 and the second housing 30 can be achieved, thereby improving the sealing performance of the battery device 100.

[0165] Secondly, embodiments of this application also provide an electrical device, including a battery device 100 according to the first aspect of this application.

[0166] In the above technical solution, by setting the battery device 100 of the first aspect embodiment, the overall performance of the power-consuming device is improved.

[0167] The following will refer to Figures 2-11 This application describes a battery device 100 according to a specific embodiment.

[0168] Reference Figure 2 and Figure 7The battery device 100 includes: a first housing 10, a second housing 30, a first reinforcing structure 20, a second reinforcing structure 40, a first sealing element, and a second sealing element. The first reinforcing structure 20 is disposed within the first housing 10, and the second reinforcing structure 40 is disposed within the second housing 30. The first reinforcing structure 20 and the second reinforcing structure 40 have the same structure and are arranged opposite to each other in the vertical direction. The second sealing element is disposed between the first housing 10 and the second housing 30 to seal the first housing 10 and the second housing 30. The first sealing element is disposed between the first reinforcing structure 20 and the second reinforcing structure 40 to seal the first reinforcing structure 20 and the second reinforcing structure 40.

[0169] Specifically, the first housing 10 is a lower housing, and a first receiving cavity 101 is formed inside the first housing 10. A first opening is formed at the upper end of the first receiving cavity 101. The first receiving cavity 101 has a first wall 11 and a second wall 12 connected in the circumferential direction of the first opening. There are two of each of the first wall 11 and the second wall 12. The two first walls 11 extend in the left-right direction and are arranged at intervals in the front-back direction. The two second walls 12 extend in the front-back direction and are arranged at intervals in the left-right direction. The first wall 11 and the second wall 12 are connected by a first arc wall 13 extending along an arc. Part of the first reinforcing structure 20 is connected to the first arc wall 13 and part is connected to the second wall 12.

[0170] Specifically, the first reinforcing structure 20 includes: a first plate portion 23, a third plate portion 24, and a first bending portion 25.

[0171] The first plate portion 23 is formed in the shape of a plate. In the first direction, the first plate portion 23 is provided with a first opening facing the bottom wall of the first receiving cavity 101. One end of the first plate portion 23 is connected to the inner wall surface of the first receiving cavity 101, and the other end extends toward the middle of the first receiving cavity 101.

[0172] The third plate portion 24 is disposed in the first receiving cavity 101 and extends along the first direction and is connected to the inner wall surface of the first receiving cavity 101. The end of the first plate portion 23 facing away from the first receiving cavity 101 is connected to the end of the third plate portion 24 facing the first opening in the first direction.

[0173] The first plate portion 23 is connected to the third plate portion 24 through the first bending portion 25. The first bending portion 25 is formed as an arc surface that protrudes around the periphery towards the first opening. The first bending portion 25 and the inner wall surface of the first receiving cavity 101 together define the first sealing groove 26, which is filled with sealant.

[0174] The second housing 30 is an upper housing located on the upper side of the first housing 10 and is used to seal the first opening. Specifically, a first connecting portion 27 extending outward toward the first receiving cavity 101 is formed around the periphery of the first opening. The first connecting portion 27 extends in a ring shape along the circumference of the first housing 10. A second connecting portion extending outward toward the second receiving cavity 301 is formed around the periphery of the second opening. The second connecting portion extends in a ring shape along the circumference of the second housing 30. A second sealing element is formed as a sealing strip, which abuts against the first connecting portion 27 and the second connecting portion to form a first seal, thereby achieving the sealing of the battery device 100.

[0175] The second housing 30 has a second receiving cavity 301 inside, and a second opening is formed on the lower side of the second receiving cavity 301. The second receiving cavity 301 has a third wall 31 and a fourth wall 32 connected in the circumferential direction of the second opening. The third wall 31 extends in the left-right direction, and the fourth wall 32 extends in the front-back direction. The third wall 31 and the fourth wall 32 are connected by a second arc wall 33 extending along an arc. Part of the second reinforcing structure 40 is connected to the third wall 31, and part is connected to the second arc wall 33.

[0176] Specifically, the second reinforcing structure 40 includes: a flat second plate portion 41, a fourth plate portion 42, and a second bent portion 43.

[0177] One end of the second plate portion 41 is connected to the inner wall surface of the second receiving cavity 301, and the other end extends toward the middle of the second receiving cavity 301. The first sealing element is arranged between the first plate portion 23 and the second plate portion 41 to form a second seal.

[0178] The fourth plate portion 42 is disposed in the second receiving cavity 301 and extends along the first direction and is connected to the inner wall surface of the second receiving cavity 301. One end of the second plate portion 41 is connected to the end of the fourth plate portion 42 facing the second opening in the first direction.

[0179] The second plate portion 41 is connected to the fourth plate portion 42 through the second bending portion 43. The second bending portion 43 is formed as an arc surface that protrudes around the periphery towards the second opening. The second bending portion 43 and the inner wall surface of the second receiving cavity 301 together define the second sealing groove 44. The second sealing groove 44 is sealed to the first sealing groove 26, and the second sealing groove 44 is also filled with sealant, together forming a third seal.

[0180] In addition, the width of the first plate portion 23 is greater than 2 mm in the direction from the periphery of the first housing 10 toward the center of the first housing 10; and the width of the second plate portion 41 is also greater than 2 mm in the direction from the periphery of the second housing 30 toward the center of the second housing 30. This can effectively increase the effective sealing area of ​​the second seal, thereby further reducing the probability of seal failure at the corner position.

[0181] At least a portion of the surface of the third plate portion 24 facing the wall of the first receiving cavity 101 is formed as a first sealing area. In the circumferential direction of the first opening, the first sealing area extends from one end of the third plate portion 24 to the other end. The third plate portion 24 is sealed to the inner wall of the first receiving cavity 101 through the first sealing area. The fourth plate portion 42 has the same structure as the third plate portion 24, and will not be described in detail here. In this way, the second seal can still play a sealing role if the first seal of the battery device 100 fails.

[0182] In the above technical solution, by setting the first reinforcing structure 20 and the second reinforcing structure 40, the structural strength of the entire box corner area can be improved, thereby increasing the load-bearing capacity of the area and effectively preventing the corner from becoming a weak point and failing preferentially under external impact or static load. At the same time, the first reinforcing structure 20 and the second reinforcing structure 40 can also increase the stress transmission path, guiding the load to be transmitted more effectively to the entire box frame, thereby increasing the stress load at that location, thus improving the deformation resistance of the entire box, reducing the probability of airtight failure of the battery device 100, and improving the reliability of the battery device 100. In addition, it can also reduce the overall weight of the entire box to a certain extent, thereby improving the lightweighting of the battery device 100.

[0183] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A first housing (10) has a first receiving cavity (101) formed inside the first housing (10). The first receiving cavity (101) has a first opening in a first direction. The first receiving cavity (101) has a first wall (11) and a second wall (12) connected in the circumferential direction of the first opening. The first wall (11) extends in a second direction, and the second wall (12) extends in a third direction. The first direction, the second direction, and the third direction intersect each other. A second housing (30) is disposed on one side of the first housing (10) in the first direction and covers the first opening. A second receiving cavity (301) is formed inside the second housing (30). The second receiving cavity (301) has a second opening on the side of the first housing (10) facing the first housing (10) in the first direction. The second receiving cavity (301) has a third wall (31) and a fourth wall (32) connected in the circumferential direction of the second opening. The third wall (31) extends along the second direction, and the fourth wall (32) extends along the third direction. The first reinforcing structure (20) is arranged at the corner of the first housing (10); The second reinforcing structure (40) is arranged at the corner of the second housing (30), and in the first direction, the second reinforcing structure (40) is arranged opposite to the first reinforcing structure (20); The first reinforcing structure (20) includes: The first plate portion (23) is formed in the shape of a plate. One end of the first plate portion (23) is connected to the inner wall surface of the first receiving cavity (101), and the other end extends toward the middle of the first receiving cavity (101). The third plate (24) is disposed in the first receiving cavity (101) and extends along the inner wall surface of the first receiving cavity (101) and is connected to the inner wall surface of the first receiving cavity (101). One end of the first plate (23) is connected to the end of the third plate (24) facing the first opening in the first direction. The first bend (25) is connected to the third plate (24) through the first bend (25). The first bend (25) is formed as an arc surface protruding towards the periphery of the first opening. The first bend (25) and the inner wall surface of the first receiving cavity (101) together define a first sealing groove (26). The first sealing groove (26) is filled with sealant.

2. The battery device according to claim 1, characterized in that, The first wall (11) and the second wall (12) are connected by a first arcuate wall (13) extending along an arc, and at least a portion of the first reinforcing structure (20) is connected to the first arcuate wall (13); and / or, The third wall (31) and the fourth wall (32) are connected by a second arc wall (33) extending along an arc, and at least a portion of the second reinforcing structure (40) is connected to the second arc wall (33).

3. The battery device according to claim 2, characterized in that, The first reinforcing structure (20) includes: a first reinforcing segment (21) and a second reinforcing segment (22), wherein the first reinforcing segment (21) extends along the second direction and is connected to the first wall (11), and the second reinforcing segment (22) is connected to one end of the first reinforcing segment (21), and the second reinforcing segment (22) extends along the first arcuate wall (13) in an arc shape and is connected to the first arcuate wall (13); and / or, The second reinforcing structure (40) includes a third reinforcing section (34) and a fourth reinforcing section (35). The third reinforcing section (34) extends along the second direction and is connected to the third wall (31). The fourth reinforcing section (35) is connected to one end of the third reinforcing section (34). The fourth reinforcing section (35) extends along the second arcuate wall (33) in an arc shape and is connected to the second arcuate wall (33).

4. The battery device according to claim 1, characterized in that, The first reinforcing structure (20) is connected to the side surface of the first housing (10) facing the first receiving cavity (101); and / or, The second reinforcing structure (40) is connected to the side surface of the second housing (30) facing the second receiving cavity (301).

5. The battery device according to claim 1, characterized in that, The second reinforcing structure (40) includes a second plate portion (41), which is formed in the shape of a plate. One end of the second plate portion (41) is connected to the inner wall surface of the second receiving cavity (301), and the other end extends toward the middle of the second receiving cavity (301).

6. The battery device according to claim 5, characterized in that, Also includes: A first seal is provided, which is sealed between the first plate portion (23) and the second plate portion (41).

7. The battery device according to claim 5, characterized in that, In the direction from the periphery of the first housing (10) toward the center of the first housing (10), the width of the first plate portion (23) is greater than 2 mm; and / or, In the direction from the periphery of the second housing (30) toward the center of the second housing (30), the width of the second plate portion (41) is greater than 2 mm.

8. The battery device according to claim 5, characterized in that, In the first direction, the first plate portion (23) is arranged in the first housing (10) near the first opening; and / or, In the first direction, the second plate portion (41) is arranged in the second housing (30) near the second opening.

9. The battery device according to claim 5, characterized in that, The second reinforcing structure (40) further includes: a fourth plate portion (42), which is disposed in the second receiving cavity (301) and extends along the first direction and is connected to the inner wall surface of the second receiving cavity (301). One end of the second plate portion (41) is connected to the end of the fourth plate portion (42) facing the second opening in the first direction.

10. The battery device according to claim 9, characterized in that, The second reinforcing structure (40) further includes a second bending portion (43), the second plate portion (41) being connected to the fourth plate portion (42) via the second bending portion (43), the second bending portion (43) being formed as an arc surface protruding toward the periphery of the second opening.

11. The battery device according to claim 10, characterized in that, The second bend (43) and the inner wall of the second receiving cavity (301) together define the second sealing groove (44), which is filled with sealant.

12. The battery device according to claim 9, characterized in that, At least a portion of the side surface of the third plate portion (24) facing the wall of the first receiving cavity (101) is formed as a first sealing area. In the circumferential direction of the first opening, the first sealing area extends from one end of the third plate portion (24) to the other end. The third plate portion (24) is sealed to the inner wall surface of the first receiving cavity (101) through the first sealing area; and / or, At least a portion of the side surface of the fourth plate portion (42) facing the wall of the second receiving cavity (301) is formed as a second sealing area. In the circumferential direction of the second opening, the second sealing area extends from one end of the fourth plate portion (42) to the other end. The fourth plate portion (42) is sealed to the inner wall surface of the second receiving cavity (301) through the second sealing area.

13. The battery device according to any one of claims 1-12, characterized in that, The periphery of the first opening is formed with a first connecting portion (27) extending toward the outside of the first receiving cavity (101), and the first connecting portion (27) extends in a ring shape along the circumference of the first housing (10). The battery device further includes a second seal, which extends circumferentially along the first opening in an annular shape and is sealed between the first connection portion (27) and the second housing (30).

14. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-13.

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