Battery device and electric device

Abstract

The embodiment of the invention discloses a battery device and a power utilization device, and the battery device comprises a first box body, a second box body, a third box body and a fourth box body, a first accommodation cavity is formed in the first box body, a first opening is formed in the first accommodation cavity in the first direction, and the first accommodation cavity is provided with a first wall and a second wall which are connected in the circumferential direction of the first opening; a second containing cavity is formed in the second box body, a second opening is formed in the side, facing the first box body, of the second containing cavity in the first direction, the second containing cavity is provided with a third wall and a fourth wall which are connected in the circumferential direction of the second opening, and the first reinforcing structure is arranged at the corner position of the first box body; and the second reinforcing structure is arranged at the corner position of the second box body, and the second reinforcing structure and the first reinforcing structure are oppositely arranged in the first direction. According to the battery device provided by the invention, the structural strength of the corner position of the whole box body can be improved, and the probability of airtight failure of the position is reduced.

Description

Technical Field

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

[0002] When a battery is used in a vehicle, the four corners of the battery housing are the primary mechanical load points and vibration transmission nodes. Stress concentration can easily lead to seal failure in these locations. To address this issue, a common approach currently employed is to increase the overall thickness of the housing, thereby enhancing the structural strength of the entire housing and improving the stress-bearing capacity of the entire battery assembly. However, this approach results in an increase in the weight of the entire housing. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a battery device that can achieve lightweight while reducing the probability of airtight failure.

[0004] The present application also provides an electrical device having the above-mentioned battery device.

[0005] In the first aspect, an embodiment of the present application provides a battery device, which includes: a first box body, a first accommodating cavity is formed in the first box body, the first accommodating cavity has a first opening formed in the first direction, the first accommodating cavity has a first wall and a second wall connected in the circumferential direction of the first opening, the first wall extends along the second direction, the second wall extends along the third direction, and the first direction, the second direction and the third direction intersect with each other; a second box body, the second box body is arranged on one side of the first box body in the first direction and covers the first opening, a second accommodating cavity is formed inside the second box body, the second accommodating cavity has a second opening formed on the side of the first direction facing the first box body, the second accommodating cavity has a third wall and a fourth wall connected in the circumferential direction of the second opening, the third wall extends along the second direction, and the fourth wall extends along the third direction; a first reinforcement structure, the first reinforcement structure is arranged at the corner position of the first box body; the second reinforcement structure is arranged at the corner position of the second box body, and in the first direction, the second reinforcement structure is arranged opposite to the first reinforcement structure.

[0006] In the above technical solution, by setting the first reinforcement structure and the second reinforcement structure, the structural strength of the corner area of ​​the entire box body can be improved, and then the bearing capacity of the area can be improved, thereby effectively preventing the corner from becoming a weak point and then failing preferentially under external impact or static load; at the same time, the first reinforcement structure and the second reinforcement structure can also increase the stress transfer path, which can guide the load to be more effectively transferred to the entire box body frame, and then the stress load at this position can be increased, thereby improving the deformation resistance of the entire box body, reducing the probability of airtight failure of the battery device, and improving the reliability of the battery device; in addition, the overall weight of the entire box body can be reduced to a certain extent, thereby improving the lightweight of the battery device.

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

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

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

[0010] In the above technical solution, by setting the first reinforcement section and the second reinforcement section, the contact area between the first reinforcement structure and the inner wall of the first accommodating cavity can be increased, which is more conducive to load transfer; at the same time, the stress acting on the arc wall can be transmitted through two paths, thereby improving the stress bearing capacity of the arc wall; by setting the third reinforcement section and the fourth reinforcement section, the contact area between the second reinforcement structure and the inner wall of the second accommodating cavity can be increased, which is more conducive to load transfer; at the same time, the stress acting on the second arc wall can be transmitted through two paths, thereby improving the stress bearing capacity of the second arc wall.

[0011] In some embodiments, the first reinforcement structure is connected to a side surface of the first box body facing the first accommodating cavity; and / or, The second reinforcement structure is connected to a side surface of the second box body facing the second accommodating cavity.

[0012] In the above technical solution, by setting a first reinforcement structure connected to the side surface of the first box body facing the first accommodating cavity, the appearance of the first box body can be improved; by setting a second reinforcement structure connected to the side surface of the second box body facing the second accommodating cavity, the appearance of the second box body can be improved.

[0013] In some embodiments, the first reinforcement structure includes: a first plate portion, the first plate portion is formed in a plate shape, one end of the first plate portion is connected to the inner wall surface of the first accommodating cavity, and the other end extends toward the middle of the first accommodating cavity; and / or, the second reinforcement structure includes: a second plate portion, the second plate portion is formed in a plate shape, one end of the second plate portion is connected to the inner wall surface of the second accommodating cavity, and the other end extends toward the middle of the second accommodating cavity.

[0014] In the above technical solution, by setting the first reinforcement structure to include a first plate-shaped portion, the overall structure of the first reinforcement structure can be simplified, thereby reducing the production cost of the entire first box body; by setting the second reinforcement structure to include a second plate-shaped portion, the overall structure of the second reinforcement structure can be simplified, thereby reducing the production cost of the entire second box body.

[0015] In some embodiments, the battery device further includes: a first seal member, the first seal member being sealed and connected between the first plate portion and the second plate portion.

[0016] In the above technical solution, by providing the first sealing member, the sealing performance of the corner area can be further improved, and the probability of sealing failure in the area can be reduced.

[0017] In some embodiments, the width of the first plate portion is greater than 2 mm in the direction from the periphery of the first box body toward the middle of the first box body; and / or the width of the second plate portion is greater than 2 mm in the direction from the periphery of the second box body toward the middle of the second box body.

[0018] In the above technical solution, by setting the width of the first plate portion to be greater than 2 mm, the structural strength of the first reinforcing structure can be further guaranteed, thereby further increasing the load at the corner position of the first box body; by setting the width of the second plate portion to be greater than 2 mm, the structural strength of the second reinforcing structure can be further guaranteed, thereby further increasing the load at the corner position of the second box body.

[0019] In some embodiments, in the first direction, the first plate portion is arranged at a position of the first box body close to the first opening; and / or, in the first direction, the second plate portion is arranged at a position of the second box body close to the second opening.

[0020] In the above technical solution, by arranging the first plate portion at a position close to the first opening of the first box body, the probability of interference between the first plate portion and the battery cell can be effectively reduced, thereby improving the reliability of the battery device; by arranging the second plate portion at a position close to the second opening of the second box body, the probability of interference between the second plate portion and the battery cell can be effectively reduced, thereby improving the reliability of the battery device.

[0021] In some embodiments, the first reinforcement structure also includes: a third plate portion, the third plate portion is arranged in the first accommodating cavity, extends along the first direction, and is connected to the inner wall surface of the first accommodating cavity, and one end of the first plate portion is connected to an end of the third plate portion facing the first opening in the first direction; and / or, the second reinforcement structure also includes: a fourth plate portion, the fourth plate portion is arranged in the second accommodating cavity, extends along the first direction, and is connected to the inner wall surface of the second accommodating cavity, and one end of the third plate portion is connected to an end of the fourth plate portion facing the second opening in the first direction.

[0022] In the above technical solution, by setting the second plate portion, the connection stability between the first reinforcement structure and the first box body can be improved, and at the same time, the supporting effect of the first reinforcement structure on the first box body can be further improved, thereby further improving the stress load at the corner position of the first box body; by setting the fourth plate portion, the connection stability between the second reinforcement structure and the second box body can be improved, and at the same time, the supporting effect of the second reinforcement structure on the second box body can be further improved, thereby further improving the stress load at the corner position of the second box body.

[0023] In some embodiments, the first reinforcement structure also includes: a first bending portion, the first plate portion is connected to the second plate portion through the first bending portion, and the first bending portion is formed into an arc surface that protrudes toward the periphery of the first opening; and / or, the second reinforcement structure also includes: a second bending portion, the second plate portion is connected to the fourth plate portion through the second bending portion, and the second bending portion is formed into an arc surface that protrudes toward the periphery of the second opening.

[0024] In the above technical solution, by setting the first bent portion to form a raised arc surface around the first opening, the risk of the side wall of the first box body being damaged due to contact with the first reinforcement structure can be reduced; at the same time, the stress concentration at the connection position between the first plate portion and the second plate portion can be reduced, thereby improving the reliability of the first reinforcement structure; by setting the second bent portion to form a raised arc surface around the second opening, the risk of the side wall of the second box body being damaged due to contact with the second reinforcement structure can be reduced; at the same time, the stress concentration at the connection position between the second plate portion and the fourth plate portion can be reduced, thereby improving the reliability of the second reinforcement structure.

[0025] In some embodiments, the first bending portion and the inner wall surface of the first accommodating cavity jointly define a first sealing groove, and the first sealing groove is filled with sealant; and / or, the second bending portion and the inner wall surface of the second accommodating cavity jointly define a second sealing groove, and the second sealing groove is filled with sealant.

[0026] In the above technical solution, a first sealing groove is defined by a first bending portion and the inner wall surface of the first accommodating cavity, and the first sealing groove is filled with sealant, which can improve the structural strength of the connection position between the first wall and the second wall, and can also improve the sealing, anti-deformation ability and overall structural stability of the area; a second sealing groove is defined by a second bending portion and the inner wall surface of the second accommodating cavity, and the second sealing groove is filled with sealant, which can improve the structural strength of the connection position between the third wall and the fourth wall, and can also improve the sealing, anti-deformation ability and overall structural stability of the area.

[0027] In some embodiments, at least a portion of a side surface of the third plate portion facing the wall of the first accommodating 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 sealedly connected to the inner wall surface of the first accommodating cavity through the first sealing area; and / or, at least a portion of a side surface of the fourth plate portion facing the wall of the second accommodating 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 sealedly connected to the inner wall surface of the second accommodating cavity through the second sealing area.

[0028] In the above technical solution, by setting the first sealing area, the connection stability between the second plate part and the first accommodating cavity can be further improved; by setting the second sealing area, the connection stability between the fourth plate part and the second accommodating cavity can be further improved.

[0029] In some embodiments, a first connecting portion extending toward the outside of the first accommodating cavity is formed on the periphery of the first opening, and the first connecting portion extends in a ring shape along the circumference of the first box body. The battery device also includes: a second sealing member, which extends in a ring shape along the circumference of the first opening and is sealed between the first connecting portion and the second box body.

[0030] In the above technical solution, by providing the second sealing member, the sealing between the first box body and the second box body can be achieved, thereby improving the sealing performance of the battery device.

[0031] In a second aspect, an embodiment of the present application further provides an electrical device comprising the battery device according to the first aspect of the present application.

[0032] In the above technical solution, the overall performance of the electrical device is improved by providing the battery device of the first embodiment.

[0033] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of a vehicle according to an embodiment of the present application; Figure 2 is a schematic diagram of a battery device according to an embodiment of the present application; Figure 3 yes Figure 2 A schematic diagram of the first housing shown in FIG; Figure 4 yes Figure 3 An enlarged view of the circled A; Figure 5 yes Figure 3 A schematic diagram of another angle of the first housing shown in FIG; Figure 6 yes Figure 2 A schematic diagram of the second housing shown in FIG; Figure 7 yes Figure 6 A schematic diagram of another angle of the second housing shown in FIG; Figure 8 yes Figure 7 An enlarged view of the circled B; Figure 9 is a schematic diagram of a battery device according to an embodiment of the present application from another angle; Figure 10 It is along Figure 9 A cross-sectional view of line AA shown in FIG; Figure 11 yes Figure 10An enlarged view of the circled area C.

[0035] Reference numerals: 1000. Vehicle; 100. Battery device; 10. First box body; 101. First accommodating cavity; 11. First wall; 12. Second wall; 13. First arc wall; 20. First reinforcement structure; 21. First reinforcement section; 22. Second reinforcement section; 23. First plate portion; 24. Third plate portion; 25. First bending portion; 26. First sealing groove; 27. First connecting portion; 30. Second box body; 301. Second accommodating chamber; 31. Third wall; 32. Fourth wall; 33. Second arc wall; 34. Third reinforcement section; 35. Fourth reinforcement section; 36. Second connecting portion; 40. Second reinforcement structure; 41. Second plate portion; 42. Fourth plate portion; 43. Second bending portion; 44. Second sealing groove; 50. Battery cells; 200. Controller; 300. Motor. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0039] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0041] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0042] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0044] Currently, market developments indicate that power batteries are becoming increasingly widely used. Power batteries are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in aerospace and other fields. As power battery applications continue to expand, market demand is also growing.

[0045] When a battery is used in a vehicle, the four corners of the battery housing are the primary mechanical load points and vibration transmission nodes. Stress concentration can easily lead to seal failure in these locations. To address this issue, a common approach currently employed is to increase the overall thickness of the housing, thereby enhancing the structural strength of the entire housing and improving the stress-bearing capacity of the entire battery assembly. However, this approach results in an increase in the weight of the entire housing.

[0046] Based on the above considerations, in order to solve the problems of easy airtight failure at the corner position and increased box weight, an embodiment of the present application provides a battery device, which includes: a first box body, a second box body, a first reinforcement structure and a second reinforcement structure. A first accommodating cavity is formed in the first box body, and the first accommodating cavity is formed with a first opening in the first direction. The first accommodating cavity has a first wall and a second wall connected in the circumferential direction of the first opening, the first wall extends along the second direction, and the second wall extends along the third direction, and the first direction, the second direction and the third direction intersect with each other; the second box body is arranged on one side of the first box body in the first direction and covers the first opening. A second accommodating cavity is formed inside the second box body, and the second accommodating cavity is formed with a second opening on a side of the first box body in the first direction. The second accommodating cavity has a third wall and a fourth wall connected in the circumferential direction of the second opening, the third wall extends along the second direction, and the fourth wall extends along the third direction; the first reinforcement structure is arranged at the corner position of the first box body; the second reinforcement structure is arranged at the corner position of the second box body, and in the first direction, the second reinforcement structure is arranged opposite to the first reinforcement structure. In this way, the structural strength of the corner position of the entire box can be improved, and the bearing capacity of the area can be improved, which can effectively prevent the corner from becoming a weak point and then failing preferentially under external impact or static load; at the same time, the first reinforcement structure and the second reinforcement structure can also increase the stress transfer path, which can guide the load to be more effectively transferred to the entire box frame, and thus the stress load at this position can be increased, thereby 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, since reinforcement is only performed in the weak area, the thickness of the plate required in certain areas of the entire box can also be reduced, thereby reducing the overall weight of the entire box to a certain extent, thereby improving the lightweight of the battery device.

[0047] The battery device disclosed in the embodiments of the present application can be used in electrical devices that use batteries as power sources or various energy storage systems that use batteries as energy storage elements. The electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery cars, electric cars, ships, spacecraft, and the like. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0048] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0049] Reference Figure 1 , Figure 1 Schematic diagram of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle 1000 during driving.

[0050] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0051] Reference Figure 2 , Figure 2 The figure is a schematic diagram of a battery device 100 according to some embodiments of the present application. The battery device 100 includes a housing and a battery cell 50. The housing defines a cavity, and the battery cell 50 is accommodated within the cavity. The housing provides a space for accommodating the battery cell 50 and can have various structures. In some embodiments, the housing can include a first portion (e.g., a first housing 10 described below) and a second portion (e.g., a second housing 30 described below). The first housing 10 and the second housing 30 are connected to define a cavity for accommodating the battery cell 50. The first housing 10 can be a hollow structure with one end open, and the second housing 30 can be a plate-like structure. The second housing 30 covers the open side of the first housing 10 to seal the open side of the first housing 10. Alternatively, the first housing 10 and the second housing 30 can both be hollow structures with one end open, with the open side of the first housing 10 covering the open side of the second housing 30. Of course, the box body formed by the first box body 10 and the second box body 30 can be in various shapes, such as a cylinder, a cuboid, etc.

[0052] In the battery device 100, there may be multiple battery cells 50, and the multiple battery cells 50 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 50. The multiple battery cells 50 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 50 may be contained within a housing. Of course, the battery device 100 may also be a battery module formed by first connecting multiple battery cells 50 in series, in parallel, or in a hybrid connection, and then the multiple battery modules may be connected in series, in parallel, or in a hybrid connection to form an entire battery cell, which is then contained within a housing. The battery device 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 50.

[0053] 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 thereto. The battery cell 50 can be cylindrical, flat, rectangular, or in other shapes.

[0054] Reference below Figure 2-Figure 11 A battery device 100 according to an embodiment of the first aspect of the present application is described. Figure 2 is a schematic diagram of a battery device 100 according to some embodiments of the present application, Figure 3 yes Figure 2 The schematic diagram of the first box 10 shown in FIG. Figure 4 yes Figure 3 The enlarged view of the circled A, Figure 5 yes Figure 3 A schematic diagram of another angle of the first box body 10 shown in FIG. Figure 6 yes Figure 2 The schematic diagram of the second box 30 shown in FIG. Figure 7 yes Figure 6 A schematic diagram of another angle of the second box 30 shown in FIG. Figure 8 yes Figure 7 The enlarged view of point B is shown in the circle. Figure 9 is a schematic diagram of the battery device 100 according to some embodiments of the present application from another angle. Figure 10 It is along Figure 9 The cross-sectional view of line AA shown in FIG. Figure 11 yes Figure 10 An enlarged view of the circled area C.

[0055] The embodiment of the present application provides a battery device 100, referring to Figure 2 and Figure 11 The battery device 100 includes: a first box body 10 , a second box body 30 , a first reinforcement structure 20 and a second reinforcement structure 40 .

[0056] Reference Figure 3 and Figure 7A first accommodating cavity 101 is formed in the first box body 10, and the first accommodating cavity 101 has a first opening formed in the first direction. The first accommodating 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 along the second direction, and the second wall 12 extends along the third direction. The first direction, the second direction and the third direction intersect with each other; the second box body 30 is arranged on one side of the first box body 10 in the first direction and covers the first opening. A second accommodating cavity 301 is formed inside the second box body 30, and the second accommodating cavity 301 has a second opening formed on a side of the first box body 10 in the first direction. The second accommodating 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.

[0057] Specifically, the first housing 10 and the second housing 30 together provide space for and protect the battery cells 50, thereby improving the reliability of the battery device 100. One of the first housing 10 and the second housing 30 is formed as a lower housing, and the other is formed as an upper housing. The specific positions are not limited in this application.

[0058] The first accommodating cavity 101 has a first wall 11 and a second wall 12 connected in the circumferential direction of the first opening, wherein the first wall 11 and the second wall 12 are both side walls of the box body. For example, the first wall 11 can be the front side wall or the rear side wall of the first box body 10, and the second wall 12 can be the left side wall or the right side wall of the first box body 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, and there is no limitation here.

[0059] Here, “the first direction, the second direction and the third direction intersect each other” can be understood as follows: the first direction, the second direction and the third direction can be perpendicular to each other, or can be arranged at an angle to each other, which is not limited here.

[0060] The second accommodating 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. It is understood that the third wall 31 can be arranged corresponding to the first wall 11 in the first direction, or 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 accommodating cavity 101, then the third wall 31 is the front side wall or the rear side wall of the second accommodating 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 further described here.

[0061] The first reinforcement structure 20 is arranged at a corner of the first box body 10. The corner of the first box body 10 is where the first wall 11 and the second wall 12 are connected. Therefore, the first reinforcement structure 20 is arranged at the corner of the first box body 10. It can be understood that the first reinforcement structure 20 can be connected to the first wall 11 and / or the second wall 12.

[0062] The second reinforcement structure 40 is arranged at a corner of the second box body 30, and in the first direction, the second reinforcement structure 40 is arranged opposite to the first reinforcement structure 20. It can be understood that the first reinforcement structure 20 and the second reinforcement structure 40 are arranged at the same corner of the entire box body and are spaced apart along the first direction.

[0063] It should be noted that the corner position of the box is usually the main load input area of ​​the battery device 100, and the stress it is subjected to is relatively large. Therefore, arranging the first reinforcement structure 20 at the corner position of the first box body 10 and arranging the second reinforcement structure 40 at the corner position of the second box body 30 can improve the structural strength of the corner position area of ​​the entire box body, thereby improving the bearing capacity of the area, thereby effectively preventing the corner from becoming a weak point and then failing preferentially under external impact or static load; at the same time, the first reinforcement structure 20 and the second reinforcement structure 40 can also increase the stress transfer path, which can guide the load to be more effectively transferred to the entire box frame, thereby increasing the stress load at this position, thereby improving the deformation resistance of the entire first box body 10, reducing the probability of airtight failure of the battery device 100, and improving the reliability of the battery device 100.

[0064] Furthermore, in the prior art, to improve the structural strength and deformation resistance of the housing, the wall thickness is generally increased, which results in a heavier overall housing weight. However, in this embodiment, reinforcement is only provided in weak areas. This ensures the load-bearing capacity of the first housing 10 while reducing the thickness of the plate material required in certain areas of the first housing 10 or reducing the supporting structure. This allows the first housing 10 to meet stress load requirements and structural strength while also reducing its overall weight, thereby further reducing the weight of the battery device 100. It should be noted that the design can be combined with SAE simulation.

[0065] Optionally, the first reinforcement structure 20 and the first box body 10 can be a split structure or an integrally formed structure, and the second reinforcement structure 40 and the second box body 30 can be a split structure or an integrally formed structure. For example, when the first box body 10 and the second box body 30 are both stamped, the first reinforcement structure 20 and the second reinforcement structure 40 can be made of plates and then fixed to the first box body 10 and the second box body 30 respectively; when the first box body 10 and the second box body 30 are formed into a frame structure, the first reinforcement structure 20 and the second box body 30 can be integrally formed with the frame. The specific structural form can be designed according to actual conditions and is not limited here.

[0066] It should be noted that the first reinforcement structure 20 can be arranged inside the first accommodating cavity 101 or on the outer wall, and the second reinforcement structure 40 can be arranged inside the second accommodating cavity 301 or on the outer wall, which is not limited here.

[0067] In the above technical solution, by providing the first reinforcement structure 20 and the second reinforcement structure 40, the structural strength of the corner area of ​​the entire box body can be improved, thereby improving the bearing capacity of the area, thereby effectively preventing the corner from becoming a weak point and then failing preferentially under external impact or static load; at the same time, the first reinforcement structure 20 and the second reinforcement structure 40 can also increase the stress transfer path, which can guide the load to be more effectively transferred to the entire box body frame, thereby improving the stress load at this position, thereby improving the deformation resistance of the entire box body, reducing the probability of airtight failure of the battery device 100, and improving the reliability of the battery device 100; in addition, the overall weight of the entire box body can be reduced to a certain extent, thereby improving the lightweight of the battery device 100.

[0068] In some embodiments, reference Figure 3 and Figure 4 The first wall 11 and the second wall 12 are connected via a first arc wall 13 extending along an arc line, and at least a portion of the first reinforcement structure 20 is connected to the first arc wall 13 .

[0069] The first wall 11 and the second wall 12 are two adjacent side walls. Therefore, the phrase "the first wall 11 and the second wall 12 are connected by a first arc wall 13 extending along an arc" can be understood to mean that the connection between the first wall 11 and the second wall 12 is through an arc transition. Specifically, an arc transition can more effectively disperse stress than a right-angle transition, further reducing stress concentration at corners, thereby improving the bending and torsional resistance of the entire first housing 10. Furthermore, when the battery device 100 is collided or squeezed, the arc structure has better energy absorption capabilities, thereby delaying structural failure and protecting the internal battery cells 50.

[0070] “At least a portion of the first reinforcement structure 20 is connected to the first arc wall 13” can be understood as follows: the first reinforcement structure 20 can be partially connected to the first arc wall 13, or can be fully connected to the first arc wall 13. That is, at least a portion of the first reinforcement structure 20 is arranged at the transition position between the first wall 11 and the second wall 12, that is, at the corner position. When the battery device 100 is assembled on the vehicle 1000, the corner position is the main load input area of ​​the battery device 100, which is subjected to greater stress. Therefore, at least a portion of the first reinforcement structure 20 is connected to the first arc wall 13, which can improve the structural strength of this area, increase the stress transfer path, and thus increase the stress load at the corner position. As a result, the thickness of the plate required in certain areas of the first box body 10 can be reduced, or the support structure can be reduced, so that the first box body 10 can reduce the overall weight while meeting the stress load and structural strength, thereby improving the lightweight of the battery device 100.

[0071] In some embodiments, reference Figure 6-Figure 8 The third wall 31 and the fourth wall 32 are connected by an arc wall extending along the arc line, and at least a portion of the second reinforcement structure 40 is connected to the second arc wall 33.

[0072] The third wall 31 and the fourth wall 32 are two adjacent side walls. Therefore, the phrase "the third wall 31 and the fourth wall 32 are connected by a second arc wall 33 extending along an arc" can be understood as meaning that the connection between the third wall 31 and the fourth wall 32 is through an arc transition. Specifically, an arc transition can more effectively disperse stress than a right-angle transition, further reducing stress concentration at corners, thereby improving the bending and torsional resistance of the entire second box body 30. Furthermore, when the battery device 100 is collided or squeezed, the arc structure has better energy absorption capabilities, thereby delaying structural failure and protecting the internal battery cells 50.

[0073] “At least a portion of the second reinforcement structure 40 is connected to the second arc wall 33” can be understood as follows: the second reinforcement structure 40 can be partially connected to the second arc wall 33, or can be fully connected to the second arc wall 33. That is, at least a portion of the second reinforcement structure 40 is arranged at the transition position between the third wall 31 and the fourth wall 32, that is, at the corner position. When the battery device 100 is assembled on the vehicle, the corner position is the main load input area of ​​the battery device 100, which is subjected to greater stress. Therefore, at least a portion of the second reinforcement structure 40 is connected to the second arc wall 33, which can improve the structural strength of this area, increase the stress transfer path, and thus increase the stress load at the corner position. As a result, the thickness of the plate required in certain areas of the second box body 30 can be reduced, or the support structure can be reduced, so that the second box body 30 can reduce the overall weight while meeting the stress load and structural strength, thereby improving the lightweight of the battery device 100. In the above technical solution, by setting at least a portion of the first reinforcement structure 20 to be connected to the first arc wall 13, the stress load and structural strength of the first box body 10 at the corner position can be improved; by setting at least a portion of the second reinforcement structure 40 to be connected to the second arc wall 33, the stress load and structural strength at the corner position of the second box body 30 can be improved. At the same time, since the second reinforcement structure 40 and the first reinforcement structure 20 are arranged relative to each other, the stress load and structural strength at the corner position of the entire box body can be further improved, thereby improving the reliability of the entire battery device 100.

[0074] In some embodiments, reference Figure 4 The first reinforcement structure 20 includes: a first reinforcement segment 21 and a second reinforcement segment 22. The first reinforcement segment 21 extends along the second direction and is connected to the first wall 11; the second reinforcement segment 22 is connected to one end of the first reinforcement segment 21. The second reinforcement segment 22 extends into an arc shape along the first circular wall 13 and is connected to the first circular wall 13.

[0075] It can be understood that the first reinforcement section 21 has the same extension direction as the first wall 11, and the second reinforcement section 22 has the same extension direction as the first arc wall 13. As a result, the first reinforcement structure 20 can be more closely fitted to the first box body 10 at the connection position, so that the first reinforcement structure 20 is in surface contact or line contact with the inner wall of the first accommodating cavity 101, thereby increasing the contact area between the first reinforcement structure 20 and the inner wall of the first accommodating cavity 101, which is more conducive to load transfer; at the same time, the first reinforcement section 21 is connected to the first wall 11, and the second reinforcement section 22 is connected to the first arc wall 13, so that the stress acting on the first arc wall 13 can be transmitted through two paths, thereby improving the stress bearing capacity of the first arc wall 13.

[0076] In the above technical solution, by setting the first reinforcement section 21 and the second reinforcement section 22, the contact area between the first reinforcement structure 20 and the inner wall of the first accommodating 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 transmitted through two paths, thereby improving the stress bearing capacity of the first arc wall 13.

[0077] In some embodiments, reference Figure 8 The second reinforcement structure 40 includes: a third reinforcement segment 34 and a fourth reinforcement segment 35. The third reinforcement segment 34 extends along the second direction and is connected to the third wall 31. The fourth reinforcement segment 35 is connected to one end of the third reinforcement segment 34. The fourth reinforcement segment 35 extends into an arc shape along the second circular arc wall 33 and is connected to the second circular arc wall 33.

[0078] It can be understood that the third reinforcement section 34 has the same extension direction as the third wall 31, and the fourth reinforcement section 35 has the same extension direction as the second arc wall 33. As a result, the third reinforcement structure can be more closely fitted to the second box body 30 at the connection position, so that the second reinforcement structure 40 is in surface contact or line contact with the inner wall of the second accommodating cavity 301, thereby increasing the contact area between the second reinforcement structure 40 and the inner wall of the second accommodating cavity 301, which is more conducive to load transfer; at the same time, the third reinforcement section 34 is connected to the third wall 31, and the fourth reinforcement section 35 is connected to the second arc wall 33, so that the stress acting on the second arc wall 33 can be transmitted through two paths, thereby improving the stress bearing capacity of the second arc wall 33.

[0079] In the above technical solution, by setting the third reinforcement section 34 and the fourth reinforcement section 35, the contact area between the second reinforcement structure 40 and the inner wall of the second accommodating 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 transmitted through two paths, thereby improving the stress bearing capacity of the second arc wall 33.

[0080] In some embodiments, reference Figure 3-Figure 4 The first reinforcement structure 20 is connected to a side surface of the first box body 10 facing the first accommodating cavity 101 .

[0081] In the above technical solution, by providing the first reinforcement structure 20 connected to the side surface of the first box body 10 facing the first accommodating cavity 101 , the appearance of the first box body 10 can be improved.

[0082] In some embodiments, reference Figure 7-Figure 8 The second reinforcement structure 40 is connected to a side surface of the second box body 30 facing the second accommodating cavity 301 .

[0083] In the above technical solution, by providing the second reinforcement structure 40 connected to the side surface of the second box body 30 facing the second accommodating cavity 301 , the appearance of the second box body 30 can be improved.

[0084] In some embodiments, reference Figure 11 The first reinforcing structure 20 includes: a first plate portion 23, which is formed in a plate shape, one end of the first plate portion 23 is connected to the inner wall surface of the first accommodating cavity 101, and the other end extends toward the middle of the first accommodating cavity 101.

[0085] Among them, the plate-shaped structure is relatively simple. Therefore, setting the first plate portion 23 to be formed in a plate shape can reduce the difficulty of making the first reinforcement structure 20, thereby reducing the production cost of the first reinforcement structure 20; at the same time, since the other end is a free end, wherein the free end refers to an end that is not directly fixed, it can undergo a certain deformation when subjected to impact or load, and then can absorb part of the energy and play a buffering role, thereby further reducing the concentration of stress.

[0086] In the above technical solution, by providing the first reinforcement structure 20 with a plate-shaped first plate portion 23 , the overall structure of the first reinforcement structure 20 can be simplified, thereby reducing the production cost of the entire first box body 10 .

[0087] In some embodiments, reference Figure 11 The second reinforcing structure 40 includes: a second plate portion 41, which is formed in a plate shape, one end of the second plate portion 41 is connected to the inner wall surface of the second accommodating cavity 301, and the other end extends toward the middle of the second accommodating cavity 301.

[0088] Among them, the plate-shaped structure is relatively simple. Therefore, setting the second plate portion 41 to be formed in a flat plate shape can reduce the difficulty of making the second reinforcement structure 40, thereby reducing the production cost of the second reinforcement structure 40; at the same time, the other end of the second plate portion 41 extends toward the middle of the second accommodating cavity 301. It can be understood that the other end of the second plate portion 41 is a free end, wherein the free end refers to an end that is not directly fixed. It can undergo a certain deformation when subjected to impact or load, and can then absorb part of the energy and play a buffering role, thereby further reducing stress concentration.

[0089] In the above technical solution, by providing the second reinforcement structure 40 with a plate-shaped second plate portion 41 , the overall structure of the second reinforcement structure 40 can be simplified, thereby reducing the production cost of the entire second box body 30 .

[0090] In some embodiments, the battery device 100 further includes a first sealant, the first sealant being sealed and connected between the first plate portion 23 and the second plate portion 41 .

[0091] It is understood that this embodiment, while providing a first fully sealed first seal between the first and second housings 10, 30, also incorporates a second seal between the first and second plates 23, 41. The first and second plates 23, 41 are located in the primary load-bearing area of ​​the structure, a critical location where airtightness is prone to failure. Therefore, providing a second seal in this location enhances the sealing performance of this area and reduces the probability of seal failure. Furthermore, compared to a fully sealed area, the partial addition of the first seal area can also reduce weight gain and lower volume utilization loss within the housing.

[0092] It should be noted that the first sealing member may be a sealing strip, or may be a sealant or other liquid sealant, which is not limited here.

[0093] Exemplarily, the first plate portion 23 is arranged on the side of the first opening facing the bottom wall of the first accommodating cavity 101, and the second plate portion 41 is arranged on the side of the second opening facing the bottom wall of the second accommodating cavity 301. That is, the first plate portion 23 and the first opening form a step surface, and the second plate portion 41 and the second opening also form a step surface. In this way, the reliability of the installation of the second seal can be improved.

[0094] In the above technical solution, by providing the first sealing member, the sealing performance of the corner area can be further improved, and the probability of sealing failure in the area can be reduced.

[0095] In some embodiments, reference Figure 11 , in the direction from the periphery of the first box body 10 toward the middle of the first box body 10 , the width d of the first plate portion 23 is greater than 2 mm.

[0096] For example, the width of the first plate portion 23 may be 3 mm, 4 mm, 5 mm or more.

[0097] In the above technical solution, by setting the width of the first plate portion 23 to be greater than 2 mm, the structural strength of the first reinforcement structure 20 can be further guaranteed, thereby further increasing the load at the corner position of the first box body 10.

[0098] In some embodiments, reference Figure 11 , in the direction from the periphery of the second box body 30 toward the middle of the second box body 30 , the width of the second plate portion 41 is greater than 2 mm.

[0099] For example, the width of the second plate portion 41 may be 3 mm, 4 mm, 5 mm or more.

[0100] In the above technical solution, by setting the width of the second plate portion 41 to be greater than 2 mm, the structural strength of the second reinforcement structure 40 can be further guaranteed, thereby further increasing the load at the corner position of the second box body 30.

[0101] In some embodiments, reference Figure 11 In the first direction, the first plate portion 23 is arranged at a position of the first box body 10 close to the first opening.

[0102] 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 accommodating cavity 101, or on the side of the first opening facing away from the bottom wall of the first accommodating cavity 101, which is not limited here.

[0103] In the above technical solution, by arranging the first plate portion 23 near the first opening of the first box body 10 , the probability of interference between the first plate portion 23 and the battery cell 50 can be effectively reduced, thereby improving the reliability of the battery device 100 .

[0104] In some embodiments, reference Figure 11 In the first direction, the second plate portion 41 is arranged at a position of the second box body 30 close to the second opening.

[0105] 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 accommodating cavity 301, or on the side of the second opening facing away from the bottom wall of the second accommodating cavity 301, which is not limited here.

[0106] In the above technical solution, by arranging the second plate portion 41 near the second opening of the second box body 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 .

[0107] In some embodiments, reference Figure 11 The first reinforcement structure 20 also includes: a third plate portion 24, the third plate portion 24 is arranged in the first accommodating cavity 101, extends along the first direction, and is connected to the inner wall surface of the first accommodating cavity 101, and one end of the first plate portion 23 is connected to one end of the third plate portion 24 in the first direction toward the first opening.

[0108] It can be understood that the third plate portion 24 is attached to and connected to the inner wall surface of the first accommodating cavity 101, that is, the third plate portion 24 is in surface contact with the inner wall surface of the first accommodating cavity 101. In this way, the contact area between the first reinforcement structure 20 and the first box body 10 can be increased, and the connection stability between the first reinforcement structure 20 and the first box body 10 can be improved; at the same time, the supporting effect of the first reinforcement structure 20 on the first box body 10 can be further improved, thereby further increasing the stress load at the corner position of the first box body 10.

[0109] For example Figure 11As shown, the first plate portion 23 is connected to the third plate portion 24 to form an "L" shape, the third plate portion 24 is connected to the inner wall surface of the first accommodating 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 position of the first accommodating cavity 101.

[0110] In the above technical solution, by setting the third plate portion 24, the connection stability between the first reinforcement structure 20 and the first box body 10 can be improved. At the same time, the supporting effect of the first reinforcement structure 20 on the first box body 10 can be further improved, thereby further improving the stress load at the corner position of the first box body 10.

[0111] In some embodiments, reference Figure 11 The second reinforcement structure 40 also includes: a fourth plate portion 42, which is arranged in the second accommodating cavity 301, extends along the first direction, and is connected to the inner wall surface of the second accommodating cavity 301, and one end of the third plate portion 24 is connected to one end of the fourth plate portion 42 in the first direction toward the second opening.

[0112] It can be understood that the fourth plate portion 42 is adhered to and connected to the inner wall surface of the second accommodating cavity 301, that is, the fourth plate portion 42 is in surface contact with the inner wall surface of the second accommodating cavity 301. In this way, the contact area between the second reinforcement structure 40 and the second box body 30 can be increased, and the connection stability between the second reinforcement structure 40 and the second box body 30 can be improved; at the same time, the supporting effect of the second reinforcement structure 40 on the first box body 10 can be further improved, thereby further increasing the stress load at the corner position of the first box body 10.

[0113] For example Figure 11 As shown, the second plate portion 41 is connected to the fourth plate portion 42 to form an "L" shape, the fourth plate portion 42 is connected to the inner wall surface of the second accommodating 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 position of the second accommodating cavity 301.

[0114] In the above technical solution, by setting the fourth plate portion 42, the connection stability between the second reinforcement structure 40 and the second box body 30 can be improved. At the same time, the supporting effect of the second reinforcement structure 40 on the second box body 30 can be further improved, thereby further improving the stress load at the corner position of the second box body 30.

[0115] In some embodiments, reference Figure 11 The first reinforcing structure 20 further 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 protruding toward the periphery of the first opening.

[0116] It can be understood that one side of the first bending portion 25 facing the inner wall surface of the first accommodating cavity 101 is formed as an arc surface. In this way, the risk of damage to the side wall of the first box body 10 caused by 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.

[0117] 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.

[0118] 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.

[0119] In the above - mentioned technical solution, by setting the first bending portion 25 to form an arc surface that protrudes along the periphery of the first opening, the risk of damage to the side wall of the first box body 10 caused by 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.

[0120] 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 protrudes along the periphery of the second opening.

[0121] It can be understood that one side of the second bending portion 43 facing the inner wall surface of the second accommodating cavity 301 is formed as an arc surface. In this way, the risk of damage to the side wall of the second box body 30 caused by 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.

[0122] In the above technical solution, by providing a second bending portion 43 to form a raised arc surface around the second opening, the risk of damage to the side wall of the second box body 30 due to contact with the second reinforcement structure 40 can be reduced; at the same time, the stress concentration at the connection position between the second plate portion 41 and the fourth plate portion 42 can also be reduced, thereby improving the reliability of the second reinforcement structure 40.

[0123] In some embodiments, reference Figure 11 The first bending portion 25 and the inner wall surface of the first accommodating cavity 101 jointly define a first sealing groove 26 , and the first sealing groove 26 is filled with sealant.

[0124] The sealant can be the excess sealant when sealing the first opening of the first housing 10, or it can be another sealant. When the sealant is excess sealant, the first sealing groove 26 mainly serves to prevent the excess sealant from entering the first accommodating cavity 101 and affecting the battery cell 50. When the sealant is another sealant, it can be understood that in addition to the first seal at the first opening, a second seal is also filled at the position of the first sealing groove 26. The first sealing groove 26 is arranged at the connection position between the first wall 11 and the second wall 12. This position is the main load-bearing area of ​​the structure and is also a key position where airtightness is easily lost. Therefore, filling the first sealing groove 26 with sealant can not only enhance the sealing performance of this area, but also improve its anti-deformation ability and overall structural stability.

[0125] In addition, since the first bent portion 25 is formed as an arc surface protruding toward the periphery of the first opening, the first sealing groove 26 is formed as a groove with a cross-section similar to a "triangle". In this way, when the sealant is filled in 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 key locations such as corners, the sealing structure with a triangular cross-section can guide and disperse the stress path, thereby effectively reducing the stress concentration at this location, thereby effectively reducing the risk of damage to this location; at the same time, the sealant can also improve the structural strength of this location to a certain extent, thereby further improving the load-bearing capacity and fatigue resistance of this area.

[0126] In the above technical solution, a first sealing groove 26 is defined together with the inner wall surface of the first accommodating cavity 101 by setting a first bending portion 25, and the first sealing groove 26 is filled with sealant, which can improve the structural strength at the connection position between the first wall 11 and the second wall 12, and can also improve the sealing and deformation resistance of the area and the overall structural stability.

[0127] In some embodiments, reference Figure 11The second bending portion 43 and the inner wall surface of the second accommodating cavity 301 jointly define a second sealing groove 44 , and the second sealing groove 44 is filled with sealant.

[0128] The sealant can be excess sealant when sealing the second opening of the second housing 30, or it can be another sealant. When the sealant is excess sealant, the second sealing groove 44 primarily prevents excess sealant from entering the second accommodating cavity 301 and affecting the battery cell 50. When the sealant is another sealant, it can be understood that, in addition to the second seal at the second opening, a second seal is also filled at 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. This area is the main load-bearing area of ​​the structure and is also a critical location where airtightness is prone to failure. Therefore, filling the second sealing groove 44 with sealant can not only enhance the sealing performance of this area, but also improve its anti-deformation ability and overall structural stability.

[0129] In addition, since the second bent portion 43 is formed as an arc surface protruding toward the periphery of the second opening, the second sealing groove 44 is formed as a groove with a cross-section similar to a "triangle". In this way, when the sealant is filled in 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 key locations such as corners, the sealing structure with a triangular cross-section can guide and disperse the stress path, thereby effectively reducing the stress concentration at this location, thereby effectively reducing the risk of damage to this location; at the same time, the sealant can also improve the structural strength of this location to a certain extent, thereby further improving the load-bearing capacity and fatigue resistance of this area.

[0130] Optionally, the second sealing groove 44 is connected to the first sealing groove 26. In this way, by filling the first sealing groove 26 and the second sealing groove 44 with sealant, a third seal can be formed there, thereby further improving the sealing reliability of the battery device 100 at the corner position of the box body and further reducing the possibility of airtight failure of the battery device 100.

[0131] In the above technical solution, the second sealing groove 44 is jointly defined by the second bending portion 43 and the inner wall surface of the second accommodating cavity 301, and the second sealing groove 44 is filled with sealant, which can improve the structural strength at the connection position between the third wall 31 and the fourth wall 32, and can also improve the sealing and deformation resistance of the area and the overall structural stability.

[0132] In some embodiments, at least a portion of the side surface of the third plate portion 24 facing the wall of the first accommodating 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 sealedly connected to the inner wall surface of the first accommodating cavity 101 through the first sealing area.

[0133] Among them, "at least part of the side surface of the third plate portion 24 facing the wall of the first accommodating cavity 101 is formed as the first sealing area" can be understood as that the side surface of the third plate portion 24 facing the wall of the first accommodating cavity 101 can be partially formed as the first sealing area, or all of it can be formed as the first sealing area.

[0134] “In the circumferential direction of the first opening, the first sealing area extends from one end to the other end of the third plate portion 24” is intended to indicate that in the circumferential direction of the first opening, the first sealing area runs through the entire third plate portion 24, that is, in the circumferential direction of the first opening, the third plate portion 24 is completely sealed with the inner wall of the first accommodating cavity 101.

[0135] It should be noted that the first sealing area and the inner wall of the first accommodating cavity 101 can be spot welded and then sealed with spot welding glue; sealing can also be achieved by full welding, which is not limited here.

[0136] In the above technical solution, by providing the first sealing area, the connection stability between the third plate portion 24 and the first accommodating cavity 101 can be further improved.

[0137] In some embodiments, at least a portion of the side surface of the fourth plate portion 42 facing the wall of the second accommodating 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 sealedly connected to the inner wall surface of the second accommodating cavity 301 through the first sealing area.

[0138] Among them, "at least part of the side surface of the fourth plate portion 42 facing the wall of the second accommodating cavity 301 is formed as the second sealing area" can be understood as that the side surface of the fourth plate portion 42 facing the wall of the second accommodating cavity 301 can be partially formed as the second sealing area, or all of it can be formed as the second sealing area.

[0139] “In the circumferential direction of the second opening, the second sealing area extends from one end to the other end of the fourth plate portion 42” is intended to indicate that in the circumferential direction of the second opening, the second sealing area runs 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 with the inner wall of the second accommodating cavity 301.

[0140] It should be noted that the second sealing area and the inner wall of the second accommodating cavity 301 can be spot welded and then sealed with spot welding glue; sealing can also be achieved by full welding, which is not limited here.

[0141] In the above technical solution, by providing the second sealing area, the connection stability between the fourth plate portion 42 and the second accommodating cavity 301 can be further improved.

[0142] In some embodiments, reference Figure 11 A first connecting portion 27 extending toward the outside of the first accommodating cavity 101 is formed on the periphery of the first opening. The first connecting portion 27 extends in a ring shape along the circumference of the first box body 10. The battery device 100 also includes: a second sealing member, which extends in a ring shape along the circumference of the first opening and is sealed between the first connecting portion 27 and the second box body 30.

[0143] It should be noted that the second sealing member may be a sealing strip, or may be a sealant or other liquid sealant, which is not limited here.

[0144] Optionally, a second connection portion 36 extending toward the outside of the second accommodating cavity 301 is formed on the periphery of the second opening. The second connection portion 36 extends in a ring shape along the periphery of the second box body 30 , and the second sealing member seals and abuts between the first connection portion 27 and the second connection portion 36 .

[0145] In the above technical solution, by providing the second sealing member, the sealing between the first box body 10 and the second box body 30 can be achieved, thereby improving the sealing performance of the battery device 100 .

[0146] In a second aspect, an embodiment of the present application further provides an electrical device, comprising the battery device 100 according to the first aspect of the present application.

[0147] In the above technical solution, the overall performance of the electrical device is improved by providing the battery device 100 of the first embodiment.

[0148] The following will refer to Figure 2-Figure 11 A battery device 100 according to a specific embodiment of the present application is described.

[0149] Reference Figure 2 and Figure 7The battery device 100 includes: a first housing 10, a second housing 30, a first reinforcement structure 20, a second reinforcement structure 40, a first seal, and a second seal. The first reinforcement structure 20 is arranged in the first housing 10, and the second reinforcement structure 40 is arranged in the second housing 30. The first reinforcement structure 20 and the second reinforcement structure 40 have the same structure and are arranged opposite to each other in the vertical direction. The second seal is arranged between the first housing 10 and the second housing 30 to seal the first housing 10 and the second housing 30. The first seal is arranged between the first reinforcement structure 20 and the second reinforcement structure 40 to seal the first reinforcement structure 20 and the second reinforcement structure 40.

[0150] Specifically, the first box body 10 is a lower box body, and a first accommodating cavity 101 is formed in the first box body 10. A first opening is formed at the upper end of the first accommodating cavity 101. The first accommodating cavity 101 has a first wall 11 and a second wall 12 connected in the circumferential direction of the first opening. The number of the first wall 11 and the second wall 12 is two. The two first walls 11 extend in the left and right directions and are arranged at intervals in the front and back directions. The two second walls 12 extend in the front and back directions and are arranged at intervals in the left and right directions. The first wall 11 and the second wall 12 are connected by a first arc wall 13 extending along the arc line. Part of the first reinforcement structure 20 is connected to the first arc wall 13, and part is connected to the second wall 12.

[0151] Specifically, the first reinforcement structure 20 includes a first plate portion 23 , a third plate portion 24 and a first bent portion 25 .

[0152] Among them, the first plate portion 23 is formed in a plate shape. In the first direction, the first plate portion 23 is arranged with the first opening facing the side of the bottom wall of the first accommodating cavity 101. One end of the first plate portion 23 is connected to the inner wall surface of the first accommodating cavity 101, and the other end extends toward the middle of the first accommodating cavity 101.

[0153] The third plate portion 24 is disposed in the first accommodating cavity 101 and extends along the first direction and is connected to the inner wall surface of the first accommodating cavity 101. The end of the first plate portion 23 facing away from the first accommodating cavity 101 is connected to the end of the third plate portion 24 in the first direction toward the first opening.

[0154] 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 protruding toward the periphery of the first opening. The first bending portion 25 and the inner wall surface of the first accommodating cavity 101 jointly define a first sealing groove 26, and the first sealing groove 26 is filled with sealant.

[0155] The second housing 30 is an upper housing, positioned above the first housing 10 and used to seal the first opening. Specifically, the first opening is formed with a first connecting portion 27 extending toward the outside of the first accommodating cavity 101. The first connecting portion 27 extends in an annular shape along the circumference of the first housing 10. The second opening is formed with a second connecting portion extending toward the outside of the second accommodating cavity 301. The second connecting portion extends in an annular shape along the circumference of the second housing 30. The second sealing member is formed as a sealing strip, which seals between the first connecting portion 27 and the second connecting portion, forming a primary seal and thereby sealing the battery device 100.

[0156] A second accommodating cavity 301 is formed inside the second box body 30, and a second opening is formed on the lower side of the second accommodating cavity 301. The second accommodating 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 the arc line. Part of the second reinforcement structure 40 is connected to the third wall 31, and part is connected to the second arc wall 33.

[0157] Specifically, the second reinforcement structure 40 includes a flat second plate portion 41 , a fourth plate portion 42 and a second bent portion 43 .

[0158] One end of the second plate portion 41 is connected to the inner wall surface of the second accommodating cavity 301 , and the other end extends toward the middle of the second accommodating cavity 301 . The first sealing member is arranged between the first plate portion 23 and the second plate portion 41 to form a second seal.

[0159] The fourth plate portion 42 is disposed in the second accommodating cavity 301 and extends along the first direction and is connected to the inner wall surface of the second accommodating cavity 301 . One end of the second plate portion 41 is connected to one end of the fourth plate portion 42 in the first direction toward the second opening.

[0160] 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 is raised around the second opening. The second bending portion 43 and the inner wall surface of the second accommodating cavity 301 jointly define a 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.

[0161] In addition, in the direction from the periphery of the first box body 10 toward the middle of the first box body 10, the width of the first plate portion 23 is greater than 2 mm; in the direction from the periphery of the second box body 30 toward the middle of the second box body 30, the width of the second plate portion 41 is also greater than 2 mm. In this way, the effective sealing area of ​​the second seal can be effectively improved, thereby further reducing the probability of sealing failure at the corner position.

[0162] At least a portion of the side surface of the third plate portion 24 facing the wall of the first accommodating 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 accommodating cavity 101 through the first sealing area. The fourth plate portion 42 has the same structure as the third plate portion 24 and is not described in detail here. In this way, even if the first seal of the battery device 100 fails, the second seal can still achieve a sealing effect.

[0163] In the above technical solution, by providing the first reinforcement structure 20 and the second reinforcement structure 40, the structural strength of the corner area of ​​the entire box body can be improved, thereby improving the bearing capacity of the area, thereby effectively preventing the corner from becoming a weak point and then failing preferentially under external impact or static load; at the same time, the first reinforcement structure 20 and the second reinforcement structure 40 can also increase the stress transfer path, which can guide the load to be more effectively transferred to the entire box body frame, thereby improving the stress load at this position, thereby improving the deformation resistance of the entire box body, reducing the probability of airtight failure of the battery device 100, and improving the reliability of the battery device 100; in addition, the overall weight of the entire box body can be reduced to a certain extent, thereby improving the lightweight of the battery device 100.

[0164] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A first box body (10), wherein a first accommodating cavity (101) is formed in the first box body (10), wherein the first accommodating cavity (101) is formed with a first opening in a first direction, wherein the first accommodating cavity (101) has a first wall (11) and a second wall (12) connected in a circumferential direction of the first opening, wherein the first wall (11) extends along a second direction, and the second wall (12) extends along a third direction, wherein the first direction, the second direction, and the third direction intersect with each other; a second box body (30), the second box body (30) being arranged on one side of the first box body (10) in the first direction and covering the first opening; a second accommodating cavity (301) being formed inside the second box body (30); a second opening being formed in the second accommodating cavity (301) on a side facing the first box body (10) in the first direction; the second accommodating cavity (301) having a third wall (31) and a fourth wall (32) connected in a circumferential direction of the second opening; the third wall (31) extending along the second direction; and the fourth wall (32) extending along the third direction; a first reinforcement structure (20), the first reinforcement structure (20) being arranged at a corner position of the first box body (10); A second reinforcement structure (40) is arranged at a corner of the second box body (30), and in the first direction, the second reinforcement structure (40) is arranged opposite to the first reinforcement structure (20).

2. The battery device according to claim 1, wherein: The first wall (11) and the second wall (12) are connected via a first arc wall (13) extending along an arc line, and at least a portion of the first reinforcement structure (20) is connected to the first arc wall (13); and / or, The third wall (31) and the fourth wall (32) are connected via a second arc wall (33) extending along an arc line, and at least a portion of the second reinforcement structure (40) is connected to the second arc wall (33).

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

4. The battery device according to claim 1, wherein: The first reinforcement structure (20) is connected to a side surface of the first box body (10) facing the first accommodating cavity (101); and / or, The second reinforcement structure (40) is connected to a side surface of the second box body (30) facing the second accommodating cavity (301).

5. The battery device according to claim 1, wherein: The first reinforcing structure (20) comprises: a first plate portion (23), the first plate portion (23) being formed in a plate shape, one end of the first plate portion (23) being connected to the inner wall surface of the first accommodating cavity (101), and the other end extending toward the middle of the first accommodating cavity (101); and / or, The second reinforcing structure (40) comprises: a second plate portion (41), the second plate portion (41) being formed in a plate shape, one end of the second plate portion (41) being connected to the inner wall surface of the second accommodating cavity (301), and the other end extending toward the middle of the second accommodating cavity (301).

6. The battery device according to claim 5, characterized in that Also includes: A first sealing member is sealingly connected 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 box body (10) toward the middle of the first box body (10), the width of the first plate portion (23) is greater than 2 mm; and / or, In a direction from the periphery of the second box body (30) toward the middle of the second box body (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 at a position of the first box (10) close to the first opening; and / or, In the first direction, the second plate portion (41) is arranged at a position of the second box body (30) close to the second opening.

9. The battery device according to claim 5, characterized in that The first reinforcing structure (20) further includes: a third plate portion (24), the third plate portion (24) being disposed in the first accommodating cavity (101), extending along the first direction, and connected to the inner wall surface of the first accommodating cavity (101), one end of the first plate portion (23) being connected to one end of the third plate portion (24) in the first direction toward the first opening; and / or, The second reinforcement structure (40) further includes: a fourth plate portion (42), the fourth plate portion (42) being arranged in the second accommodating cavity (301), extending along the first direction, and connected to the inner wall surface of the second accommodating cavity (301), and one end of the second plate portion (41) being connected to one end of the fourth plate portion (42) in the first direction toward the second opening.

10. The battery device according to claim 9, characterized in that The first reinforcing structure (20) further includes: a first bending portion (25), the first plate portion (23) is connected to the third plate portion (24) via the first bending portion (25), the first bending portion (25) being formed as a curved surface convex toward the periphery of the first opening; and / or, The second reinforcing structure (40) further includes: a second bending portion (43), the second plate portion (41) is connected to the fourth plate portion (42) via the second bending portion (43), and the second bending portion (43) is formed as a curved surface that is raised toward the periphery of the second opening.

11. The battery device according to claim 10, characterized in that The first bending portion (25) and the inner wall surface of the first accommodating cavity (101) jointly define a first sealing groove (26), and the first sealing groove (26) is filled with a sealant; and / or, The second bending portion (43) and the inner wall surface of the second accommodating cavity (301) jointly define a second sealing groove (44), and the second sealing groove (44) is filled with sealant.

12. The battery device according to claim 9, wherein: At least a portion of a side surface of the third plate portion (24) facing the wall surface of the first accommodating cavity (101) is formed as a first sealing area, and 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 sealedly connected to the inner wall surface of the first accommodating 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 accommodating 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 and connected to the inner wall surface of the second accommodating cavity (301) through the second sealing area.

13. The battery device according to any one of claims 1 to 12, characterized in that: A first connecting portion (27) extending toward the outside of the first accommodating cavity (101) is formed on the periphery of the first opening. The first connecting portion (27) extends in a ring shape along the circumference of the first box body (10). The battery device further comprises a second sealing member, which extends in a ring shape along the circumference of the first opening and is sealed between the first connecting portion (27) and the second box (30).

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

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