Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a single battery and a box body, the box body comprises a frame, the frame defines a containing space, the single battery is contained in the containing space, the frame comprises a first beam and a second beam, the first beam extends in the first direction, the second beam extends in the second direction, and the first direction intersects with the second direction. Wherein the first beam is internally provided with a first cavity, the first beam comprises a first side wall, the first cavity is located on the side, opposite to the containing space, of the first side wall, the second beam is connected to the first side wall and located in the same plane perpendicular to the second direction, and the orthographic projection of the second beam is located in the orthographic projection of the first side wall. According to the invention, the reliability of the battery device can be effectively improved.

Description

Technical Field

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

[0002] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0003] In the development of battery technology, improving the airtightness of battery devices is an ongoing research direction. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can effectively improve the reliability of the battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, which includes a battery cell and a housing. The housing includes a frame that encloses a receiving space, in which the battery cell is received. The frame includes a first beam and a second beam. The first beam extends along a first direction, and the second beam extends along a second direction, the first and second directions intersecting. The first beam has a first cavity inside and includes a first sidewall. The first cavity is located on the side of the first sidewall facing away from the receiving space. The second beam is connected to the first sidewall, and in the same plane perpendicular to the second direction, the orthographic projection of the second beam lies within the orthographic projection of the first sidewall.

[0006] By connecting the second beam to the first sidewall, the second beam is effectively decoupled from the first cavity inside the first beam. Therefore, when the second beam experiences airtightness issues, pollutants such as moisture and dust from the external environment will only affect the second beam itself and will not further intrude into the first cavity, thus significantly reducing the possibility of external pollution spreading.

[0007] Therefore, the above technical solution can effectively block the contamination propagation path between different beams of the box frame without increasing structural complexity, improve the airtightness of the box frame, and thus improve the overall reliability of the battery device.

[0008] In some embodiments of the first aspect, the first beam further includes a second sidewall, which is disposed opposite to the first sidewall along a second direction. The housing also includes a mounting member connected to the second sidewall.

[0009] The first cavity in this embodiment can separate the first sidewall and the second sidewall. Even if the connection between the mount and the second sidewall cracks and pollutants such as water vapor and dust from the external environment enter the first cavity, the first sidewall can block the pollutants such as water vapor and dust from the external environment, making it difficult for them to enter the containment space, thereby improving the overall reliability of the battery device.

[0010] In some embodiments of the first aspect, the first beam further includes a first reinforcing rib, which is disposed within the first cavity and connected between the first sidewall and the second sidewall. The first cavity includes a first sub-cavity and a second sub-cavity, which are respectively disposed on both sides of the first reinforcing rib along a third direction. The first sidewall has a through hole that connects the second sub-cavity and the receiving space. The first direction, the second direction, and the third direction are perpendicular to each other. The mounting member includes a main body and a connecting part. The main body is connected to the second sidewall through the connecting part. In the same plane perpendicular to the second direction, the orthographic projection of the connecting part is spaced apart from the orthographic projection of the second sub-cavity.

[0011] The first reinforcing rib in this embodiment can separate the first sub-cavity and the second sub-cavity. Even if the connection between the connecting part and the second side wall cracks, the water vapor, dust and other pollutants in the external environment will be blocked by the first reinforcing rib and will have difficulty entering the second sub-cavity. This can effectively reduce the amount of water vapor, dust and other pollutants in the external environment entering the accommodating space through the through hole, which helps to improve the overall reliability of the battery device.

[0012] In some embodiments of the first aspect, the first beam further includes a second reinforcing rib disposed within the first cavity and connected between the first sidewall and the second sidewall, and a second sub-cavity located between the first and second reinforcing ribs. The first cavity also includes a third sub-cavity located on the side of the second reinforcing rib facing away from the second sub-cavity. The connecting portion includes a first connecting body and a second connecting body. In the same plane perpendicular to the first direction, the orthographic projection of the first connecting body lies within the orthographic projection of the first sub-cavity, and the orthographic projection of the second connecting body lies within the orthographic projection of the third sub-cavity.

[0013] By introducing a first connector and a second connector in the embodiments of this application, the first connector and the second connector can jointly bear the load, increasing the contact area between the connector and the second sidewall, thereby helping to reduce the risk of connection failure between the connector and the second sidewall and improving the reliability of the battery device.

[0014] Furthermore, the first reinforcing rib can separate the first sub-cavity and the second sub-cavity. Even if the connection between the first connector and the second sidewall cracks, water vapor, dust, and other pollutants from the external environment will be blocked by the first reinforcing rib and will have difficulty entering the second sub-cavity. This effectively reduces the entry of water vapor, dust, and other pollutants from the external environment into the accommodating space through the through-hole. The second reinforcing rib can separate the second sub-cavity and the third sub-cavity. Even if the connection between the second connector and the second sidewall cracks, water vapor, dust, and other pollutants from the external environment will be blocked by the second reinforcing rib and will have difficulty entering the second sub-cavity. This effectively reduces the entry of water vapor, dust, and other pollutants from the external environment into the accommodating space through the through-hole.

[0015] In some embodiments of the first aspect, the mount further includes a reinforcing portion, which includes a first connecting end and a second connecting end. The first connecting end is connected to a second sidewall, and the second connecting end is connected to the main body. In the same plane perpendicular to the first direction, the orthographic projection of the first connecting end and the orthographic projection of the second sub-cavity are spaced apart.

[0016] By incorporating reinforcing sections, the overall structural strength of the load-bearing component can be significantly improved, reducing the risk of deformation or damage due to localized stress concentration. Furthermore, since the orthographic projections of the first connecting end and the second sub-cavity are spaced apart in the same plane perpendicular to the first direction, even if cracks occur at the connection between the reinforcing section and the second sidewall, contaminants such as moisture and dust from the external environment entering the first sub-cavity will be blocked by the first reinforcing rib, making it difficult for them to further enter the second sub-cavity. This effectively reduces the entry of moisture, dust, and other contaminants from the external environment into the containing space through the through-holes, contributing to improved overall reliability of the battery device.

[0017] In some embodiments of the first aspect, the main body includes a first portion and a second portion, which are disposed opposite to each other along a third direction, and a reinforcing portion is disposed between the first portion and the second portion. The reinforcing portion further includes a reinforcing body connected between a first connecting end and a second connecting end, at least a portion of which is connected to the first portion, and the second connecting end is connected to the second portion.

[0018] By strengthening the effective connection between the main body and the first part, and the effective connection between the second connection end and the second part, when the load-bearing component is subjected to external loads, the load can be reasonably distributed between the first part and the second part, reducing local stress concentration and helping to improve the overall structural strength of the load-bearing component.

[0019] In some embodiments of the first aspect, the first beam further includes a third sidewall, and a first cavity is located on one side of the third sidewall along a third direction. The third sidewall is connected to the first sidewall, and the first direction, the second direction, and the third direction are perpendicular to each other. The third sidewall has a first connecting hole that communicates with the first cavity, and the first connecting hole has an internal thread. The housing also includes a first plate, which is disposed on one side of the frame along a third direction, and the first plate is connected to the first beam through the first connecting hole.

[0020] By machining internal threads directly into the first connecting hole on the third sidewall, the first plate can be directly fixed to the first beam via a threaded connection, eliminating the need for additional connecting parts such as rivet nuts on the third sidewall. This simplifies the structure of the housing, reduces the number of parts, lowers the weight of the housing, and helps improve the energy density of the battery device.

[0021] In some embodiments of the first aspect, the first beam further includes a second sidewall and a first reinforcing rib. The second sidewall and the first sidewall are disposed opposite to each other along a second direction. A third sidewall is connected between the first sidewall and the second sidewall. The first reinforcing rib is disposed within the first cavity and connected between the first sidewall and the second sidewall. The first cavity includes a first sub-cavity and a second sub-cavity, which are respectively disposed on both sides of the first reinforcing rib along a third direction. A first connecting hole communicates with the first sub-cavity. A through hole is provided on the first sidewall, which communicates with the second sub-cavity and the receiving space.

[0022] The first reinforcing rib in this embodiment can separate the first sub-cavity and the second sub-cavity. Even if the seal at the first connecting hole fails, water vapor, dust and other contaminants from the external environment will be blocked by the first reinforcing rib and will have difficulty entering the second sub-cavity. This can effectively reduce the amount of water vapor, dust and other contaminants from the external environment entering the containment space through the through hole, which helps to improve the overall reliability of the battery device.

[0023] In some embodiments of the first aspect, the first beam further includes a fourth sidewall, which is disposed opposite to the third sidewall along a third direction and is connected to the first sidewall. The fourth sidewall has a second connecting hole communicating with the first cavity, and the second connecting hole has an internal thread. The housing also includes a second plate, which is disposed on the side of the frame away from the first plate along a third direction, and the second plate is connected to the first beam through two connecting holes.

[0024] By machining internal threads directly into the second connecting hole on the fourth side wall, the second plate can be directly fixed to the first beam via a threaded connection, eliminating the need for additional connecting parts such as rivet nuts on the fourth side wall. This simplifies the structure of the housing, reduces the number of parts, lowers the weight of the housing, and helps improve the energy density of the battery device.

[0025] In some embodiments of the first aspect, the first beam further includes a second sidewall, a first reinforcing rib, and a second reinforcing rib. The second sidewall and the first sidewall are disposed opposite each other along a second direction. A third sidewall is connected between the first sidewall and the second sidewall, and a fourth sidewall is connected between the first sidewall and the second sidewall. The first reinforcing rib is disposed within the first cavity and connected between the first sidewall and the second sidewall, and the second reinforcing rib is disposed within the first cavity and connected between the first sidewall and the second sidewall. The first cavity includes a first sub-cavity, a second sub-cavity, and a third sub-cavity. The first sub-cavity is located between the third sidewall and the first reinforcing rib, the second sub-cavity is located between the first reinforcing rib and the second reinforcing rib, and the third sub-cavity is located between the second reinforcing rib and the fourth sidewall. A first connecting hole communicates with the first sub-cavity, and a second connecting hole communicates with the third sub-cavity. A through hole is provided on the first sidewall, which communicates with the second sub-cavity and the receiving space.

[0026] The first reinforcing rib in this embodiment can separate the first sub-cavity and the second sub-cavity. Even if the seal at the first connecting hole fails, water vapor, dust, and other contaminants from the external environment entering the first sub-cavity will be blocked by the first reinforcing rib and will have difficulty further entering the second sub-cavity. This effectively reduces the entry of water vapor, dust, and other contaminants from the external environment into the receiving space through the through hole. The second reinforcing rib can separate the second sub-cavity and the third sub-cavity. Even if the seal at the second connecting hole fails, water vapor, dust, and other contaminants from the external environment entering the third sub-cavity will be blocked by the second reinforcing rib and will have difficulty further entering the second sub-cavity. This effectively reduces the entry of water vapor, dust, and other contaminants from the external environment into the receiving space through the through hole.

[0027] In some embodiments of the first aspect, the second beam is a solid structure.

[0028] By making the second beam a solid structure, the internal cavity structure can be eliminated, making the overall structure of the second beam more compact. While ensuring the strength requirements are met, this also helps to reduce the overall volume of the housing and increase the energy density of the battery device.

[0029] In some embodiments of the first aspect, the second beam includes a first wall and two second walls, which are respectively connected to the two ends of the first wall along a third direction, and the second walls are bent relative to the first wall in a direction away from the receiving space, with the first direction, the second direction and the third direction being perpendicular to each other.

[0030] By designing the second beam as a C-shaped beam, the bending stiffness and structural strength of the second beam can be improved without significantly increasing the amount of material used. Simultaneously, the two second walls bend away from the accommodating space, reducing the encroachment on the accommodating space and improving its effective utilization.

[0031] In some embodiments of the first aspect, the box body includes two first beams and two second beams, the two first beams being arranged opposite each other along a second direction, the two second beams being arranged opposite each other along a first direction, and each second beam being connected between the first sidewalls of the two first beams.

[0032] In some embodiments of the first aspect, the battery device further includes a connector, and a mounting opening is provided on the second beam, the mounting opening extending through the second beam in a second direction, and the connector is mounted in the mounting opening.

[0033] The aforementioned technical solution integrates the connector into the second beam, reducing the need for additional mounting structures and making the enclosure structure more compact. Furthermore, the first sidewall separates the first cavity from the second beam, allowing the first cavity to be independently positioned relative to the second beam. Therefore, when airtightness issues arise at the mounting opening, moisture, dust, and other contaminants from the external environment will not further intrude into the first cavity, significantly reducing the possibility of external contamination spreading.

[0034] Secondly, this application provides an electrical device that includes a battery device provided in any embodiment of the first aspect, the battery device being used to store or provide electrical energy.

[0035] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0036] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0037] Figure 1 These are schematic diagrams of the vehicle structure provided in some embodiments of this application;

[0038] Figure 2 This is an exploded structural diagram of a battery device provided in some embodiments of this application;

[0039] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point H;

[0040] Figure 4 This is a partial top view of a battery device provided in some embodiments of this application;

[0041] Figure 5 for Figure 4Schematic diagram of the cross-sectional structure along AA;

[0042] Figure 6 for Figure 5 A magnified schematic diagram of the local structure at point K.

[0043] The reference numerals in the detailed embodiments are as follows:

[0044] 1. Vehicle; 2. Battery unit; 3. Controller; 4. Motor;

[0045] 10. Battery cells;

[0046] 20. Box body; 21. Storage space; 22. Frame;

[0047] 221, First beam; 2211, First cavity; 22111, First sub-cavity; 22112, Second sub-cavity; 22113, Third sub-cavity; 2212, First sidewall; 22121, Through hole; 2213, Second sidewall; 2214, First reinforcing rib; 2215, Second reinforcing rib; 2216, Third sidewall; 22161, First connecting hole; 2217, Fourth sidewall; 22171, Second connecting hole;

[0048] 222, Second beam; 2221, First wall; 2222, Second wall;

[0049] 23. Mounting component; 231. Main body; 2311. First part; 2312. Second part; 232. Connecting part; 2321. First connecting body; 2322. Second connecting body; 233. Reinforcing part; 2331. First connecting end; 2332. Second connecting end; 2333. Reinforcing body;

[0050] 24. First panel; 25. Second panel;

[0051] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0054] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0056] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0057] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0058] In this application, "multiple" means two or more (including two).

[0059] In this application, the term "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering.

[0060] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0061] In the development of battery technology, improving the airtightness of battery devices is an ongoing research direction.

[0062] In related technologies, the casing frame of a battery device is typically composed of roll-formed beams with cavities. The cavities of adjacent roll-formed beams are interconnected. Various components are usually mounted on the roll-formed beams, such as welded mounting parts or mounting ports for connectors. During daily use of the battery device, because the cavities of adjacent roll-formed beams are interconnected, if an airtightness problem occurs in one roll-formed beam, moisture, dust, and other contaminants from the external environment can enter its cavity and further spread to the cavities of other roll-formed beams, increasing the risk of battery device damage and affecting its reliability.

[0063] Based on the above considerations, this application designs a battery device, which includes a battery cell and a housing. The housing includes a frame that encloses a receiving space, in which the battery cell is received. The frame includes a first beam and a second beam. The first beam extends along a first direction, and the second beam extends along a second direction, intersecting the first and second directions. The first beam has a first cavity inside and includes a first sidewall. The first cavity is located on the side of the first sidewall facing away from the receiving space. The second beam is connected to the first sidewall, and in the same plane perpendicular to the second direction, the orthographic projection of the second beam lies within the orthographic projection of the first sidewall.

[0064] By connecting the second beam to the first sidewall, the second beam is effectively decoupled from the first cavity inside the first beam. Therefore, when the second beam experiences airtightness issues, pollutants such as moisture and dust from the external environment will only affect the second beam itself and will not further intrude into the first cavity, thus significantly reducing the possibility of external pollution spreading.

[0065] Therefore, the above technical solution can effectively block the contamination propagation path between different beams of the box frame without increasing structural complexity, improve the airtightness of the box frame, and thus improve the overall reliability of the battery device.

[0066] The battery device described in this application can be used, but is not limited to, in vehicles, and can also be used in other electrical devices. For example, the electrical device can be a device that uses the battery device as a power source or various energy storage systems that use the battery device as an energy storage element. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0067] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0068] Figure 1 The diagram shows the structure of a vehicle provided in some embodiments of this application.

[0069] like Figure 1 As shown, a battery device 2 is installed inside the vehicle 1. The battery device 2 can be located at the bottom, front, or rear of the vehicle 1. The battery device 2 can be used to power the vehicle 1; for example, the battery device 2 can serve as the operating power source for the vehicle 1.

[0070] The vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, for the power needs of the vehicle 1 during starting, navigation and driving.

[0071] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0072] Figure 2 This is an exploded structural diagram of a battery device provided in some embodiments of this application. Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point H. Figure 4 This is a partial top view of a battery device provided in some embodiments of this application. Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure along AA. Figure 6 for Figure 5 A magnified schematic diagram of the local structure at point K.

[0073] Continue to refer to Figures 2 to 6This application provides a battery device 2, which includes a battery cell 10 and a housing 20. The housing 20 includes a frame 22, which encloses a receiving space 21. The battery cell 10 is received within the receiving space 21. The frame 22 includes a first beam 221 and a second beam 222. The first beam 221 extends along a first direction X, and the second beam 222 extends along a second direction Y. The first direction X and the second direction Y intersect. The first beam 221 has a first cavity 2211 inside and includes a first sidewall 2212. The first cavity 2211 is located on the side of the first sidewall 2212 facing away from the receiving space 21. The second beam 222 is connected to the first sidewall 2212. In the same plane perpendicular to the second direction Y, the orthographic projection of the second beam 222 is located within the orthographic projection of the first sidewall 2212.

[0074] In other words, the second beam 222 is connected to the side surface of the first sidewall 2212 facing the receiving space 21. The first sidewall 2212 can separate the first cavity 2211 from the second beam 222, so that the first cavity 2211 is set independently relative to the second beam 222.

[0075] For example, the first beam 221 may be a roll-formed beam.

[0076] For example, the second beam 222 can be a solid structure, such as a C-beam or an I-beam. The second beam 222 can also have a second cavity, such as a roll-formed beam, and the first sidewall 2212 can space the first cavity 2211 from the second cavity.

[0077] The material of the first beam 221 and the second beam 222 can be the same or different. Optionally, both the first beam 221 and the second beam 222 can be made of materials with a certain hardness and strength (such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.). In this way, the frame 22 is less likely to deform when subjected to compression and impact, so that the battery device 2 can have higher strength and improved reliability.

[0078] The connection between the second beam 222 and the first side wall 2212 can be welding, bolting, or snap-fit ​​connection, etc.

[0079] By connecting the second beam 222 to the first sidewall 2212, the second beam 222 is effectively decoupled from the first cavity 2211 inside the first beam 221. Therefore, when the second beam 222 experiences airtightness issues, pollutants such as moisture and dust from the external environment will only affect the second beam 222 itself and will not further intrude into the first cavity 2211, thus significantly reducing the possibility of external pollution spreading.

[0080] Therefore, the above technical solution can effectively block the pollution propagation path between different beams of the frame 22 of the box 20 without increasing the structural complexity, improve the airtightness of the frame 22 of the box 20, and thus improve the overall reliability of the battery device 2.

[0081] In some embodiments, the first direction X is perpendicular to the second direction Y.

[0082] In some embodiments, the battery device 2 may include one or more battery cells 10 for providing voltage and capacity.

[0083] A battery cell assembly 10 may include multiple battery cells 10, which are connected in series, parallel, or mixed connection via a busbar. Mixed connection means that multiple battery cells 10 are connected in both series and parallel.

[0084] The battery cell 10 can be a secondary battery cell 10, which refers to a battery cell 10 that can be used again after being discharged by recharging to activate the active materials.

[0085] As an example, the battery cell 10 can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc.

[0086] As an example, the battery cell 10 can be a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.

[0087] In some embodiments, the battery cell 10 assembly is typically formed by arranging multiple battery cells 10; as an example, the battery cell 10 assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 10 into a single module. As an example, a battery module can be formed by bundling multiple battery cells 10 together with cable ties.

[0088] In some embodiments, the battery device 2 may be a battery pack, which includes a housing 20 and one or more battery cell 10 assemblies, the battery cell 10 assemblies being housed within the housing 20. As an example, the battery cell 10 assembly may be a battery module, and the battery cell 10 assembly may be housed within the housing 20 by securing a battery module to the housing 20. As an example, the battery cell 10 assembly may also be housed within the housing 20 by directly securing multiple battery cells 10 to the housing 20.

[0089] In some embodiments, the housing 20 is used to house the battery cell 10, and the housing 20 can have various structures.

[0090] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0091] In some embodiments, the first beam 221 further includes a second sidewall 2213, which is disposed opposite to the first sidewall 2212 along the second direction Y. The box body 20 further includes a mounting member 23, which is connected to the second sidewall 2213.

[0092] During the use of the battery device 2, the mounting part 23 is subjected to a large force, which makes the connection between the mounting part 23 and the second side wall 2213 prone to cracking.

[0093] The first cavity 2211 of this application embodiment can separate the first sidewall 2212 and the second sidewall 2213. Even if the connection between the mounting member 23 and the second sidewall 2213 cracks and pollutants such as water vapor and dust in the external environment enter the first cavity 2211, the first sidewall 2212 can block the pollutants such as water vapor and dust in the external environment, making it difficult for them to enter the containing space 21, thereby improving the overall reliability of the battery device 2.

[0094] The material of the mounting component 23 can be the same as or different from that of the first beam 221. Optionally, the mounting component 23 can be made of a material with a certain hardness and strength (such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.). In this way, the mounting component 23 is not easily deformed when subjected to compression and collision, so that the battery device 2 can have higher strength and improved reliability.

[0095] The mounting component 23 can be directly connected to the first beam 221, or it can be connected to the first beam 221 at intervals through other components. As an example, the connection method between the mounting component 23 and the first beam 221 can be, but is not limited to, welding, bolting, or snap-fitting.

[0096] In some embodiments, the mount 23 is welded to the second sidewall 2213.

[0097] In some embodiments, the first beam 221 further includes a first reinforcing rib 2214, which is disposed within the first cavity 2211 and connected between the first sidewall 2212 and the second sidewall 2213. The first cavity 2211 includes a first sub-cavity 22111 and a second sub-cavity 22112, which are respectively disposed on both sides of the first reinforcing rib 2214 along the third direction Z. The first sidewall 2212 has a through hole 22121, which connects the second sub-cavity 22112 and the receiving space 21. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The mounting member 23 includes a main body 231 and a connecting part 232. The main body 231 is connected to the second sidewall 2213 through the connecting part 232. In the same plane perpendicular to the second direction Y, the orthographic projection of the connecting part 232 is spaced apart from the orthographic projection of the second sub-cavity 22112.

[0098] The first reinforcing rib 2214 can separate the first sub-cavity 22111 and the second sub-cavity 22112 so that the first sub-cavity 22111 and the second sub-cavity 22112 are not connected.

[0099] The first reinforcing rib 2214 can be directly connected to the first sidewall 2212, or it can be connected to the first sidewall 2212 at intervals through other components. As an example, the connection method between the first reinforcing rib 2214 and the first sidewall 2212 can be, but is not limited to, welding, bolting, or snap-fitting.

[0100] The first reinforcing rib 2214 can be directly connected to the second sidewall 2213, or it can be connected to the second sidewall 2213 at intervals through other components. As an example, the connection method between the first reinforcing rib 2214 and the second sidewall 2213 can be, but is not limited to, welding, bolting, or snap-fitting.

[0101] Optionally, the first reinforcing rib 2214 can be made of a material with a certain hardness and strength (such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.).

[0102] For example, the battery device 2 may also include a conduit, which may be located within the receiving space 21 and bound by a cable tie, and then the cable tie is fixed to the first side wall 2212 by a fastener, the fastener being snapped into the through hole 22121. Of course, the conduit may also be introduced into the second sub-cavity 22112 through the through hole 22121 to reduce the conduit's occupation of the receiving space 21.

[0103] In the same plane perpendicular to the second direction Y, the orthographic projection of the connecting portion 232 and the orthographic projection of the second sub-cavity 22112 are spaced apart. In other words, in the same plane perpendicular to the second direction Y, the orthographic projection of the connecting portion 232 and the orthographic projection of the second sub-cavity 22112 do not overlap.

[0104] During the use of the battery device 2, the mounting part 23 is subjected to a large force, which makes the connection between the connecting part 232 and the second side wall 2213 prone to cracking.

[0105] The first reinforcing rib 2214 in this embodiment can separate the first sub-cavity 22111 and the second sub-cavity 22112. Even if the connection between the connecting part 232 and the second side wall 2213 cracks, the water vapor, dust and other pollutants in the external environment will enter the first sub-cavity 22111 and will be blocked by the first reinforcing rib 2214, making it difficult for them to further enter the second sub-cavity 22112. This can effectively reduce the amount of water vapor, dust and other pollutants in the external environment entering the accommodating space 21 through the through hole 22121, which helps to improve the overall reliability of the battery device 2.

[0106] In some embodiments, the main body 231 and the connecting part 232 are integrally formed, which can simplify the manufacturing process.

[0107] In some embodiments, the first cavity 2211 extends along a first direction X.

[0108] In some embodiments, the number of through holes 22121 is multiple, and the multiple through holes 22121 are spaced apart along the first direction X.

[0109] In some embodiments, the first beam 221 further includes a second reinforcing rib 2215, which is disposed within the first cavity 2211 and connected between the first sidewall 2212 and the second sidewall 2213. A second sub-cavity 22112 is located between the first reinforcing rib 2214 and the second reinforcing rib 2215. The first cavity 2211 also includes a third sub-cavity 22113, located on the side of the second reinforcing rib 2215 facing away from the second sub-cavity 22112. The connecting portion 232 includes a first connecting body 2321 and a second connecting body 2322. In the same plane perpendicular to the first direction X, the orthographic projection of the first connecting body 2321 lies within the orthographic projection of the first sub-cavity 22111, and the orthographic projection of the second connecting body 2322 lies within the orthographic projection of the third sub-cavity 22113.

[0110] The second reinforcing rib 2215 can separate the second sub-cavity 22112 and the third sub-cavity 22113 so that the second sub-cavity 22112 and the third sub-cavity 22113 are not connected.

[0111] By introducing a first connector 2321 and a second connector 2322 in this embodiment, the first connector 2321 and the second connector 2322 can jointly bear the load, increasing the contact area between the connecting part 232 and the second side wall 2213, thereby helping to reduce the risk of connection failure between the connecting part 232 and the second side wall 2213 and improving the reliability of the battery device 2.

[0112] Furthermore, the first reinforcing rib 2214 can separate the first sub-cavity 22111 and the second sub-cavity 22112. Even if the connection between the first connector 2321 and the second sidewall 2213 cracks, water vapor, dust, and other pollutants from the external environment will enter the first sub-cavity 22111 through the first reinforcing rib 2214, making it difficult for them to further enter the second sub-cavity 22112. This effectively reduces the entry of water vapor, dust, and other pollutants from the external environment into the accommodating space 21 through the through hole 22121. The second reinforcing rib 2215 can separate the second sub-cavity 22112 and the third sub-cavity 22113. Even if the connection between the second connector 2322 and the second sidewall 2213 cracks, water vapor, dust, and other pollutants from the external environment will enter the third sub-cavity 22113 through the second reinforcing rib 2215, making it difficult for them to further enter the second sub-cavity 22112. This effectively reduces the entry of water vapor, dust, and other pollutants from the external environment into the accommodating space 21 through the through hole 22121.

[0113] The material of the second reinforcing rib 2215 can be the same as or different from that of the first reinforcing rib 2214. Optionally, the second reinforcing rib 2215 can be made of a material with a certain hardness and strength (such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.).

[0114] In some embodiments, the mounting member 23 further includes a reinforcing portion 233, which includes a first connecting end 2331 and a second connecting end 2332. The first connecting end 2331 is connected to the second sidewall 2213, and the second connecting end 2332 is connected to the main body portion 231. In the same plane perpendicular to the first direction X, the orthographic projection of the first connecting end 2331 and the orthographic projection of the second sub-cavity 22112 are spaced apart.

[0115] By providing the reinforcing part 233, the overall structural strength of the bearing component can be significantly improved, reducing the risk of deformation or damage caused by local stress concentration. Furthermore, since the orthographic projection of the first connecting end 2331 and the orthographic projection of the second sub-cavity 22112 are spaced apart in the same plane perpendicular to the first direction X, even if cracks occur at the connection between the reinforcing part 233 and the second side wall 2213, water vapor, dust, and other pollutants from the external environment will be blocked by the first reinforcing rib 2214 after entering the first sub-cavity 22111, making it difficult for them to further enter the second sub-cavity 22112. This effectively reduces the entry of water vapor, dust, and other pollutants from the external environment into the receiving space 21 through the through hole 22121, which helps to improve the overall reliability of the battery device 2.

[0116] The first connecting end 2331 can be directly connected to the second sidewall 2213, or it can be connected to the second sidewall 2213 at intervals through other components. As an example, the connection method between the first connecting end 2331 and the second sidewall 2213 can be, but is not limited to, welding, bolting, or snap-fitting.

[0117] The second connecting end 2332 can be directly connected to the main body 231, or it can be connected to the main body 231 at intervals through other components. As an example, the connection method between the second connecting end 2332 and the main body 231 can be, but is not limited to, welding, bolting, or snap-fitting.

[0118] In some embodiments, the first connecting end 2331 is welded to the second sidewall 2213, and the second connecting end 2332 is welded to the main body 231.

[0119] In some embodiments, the main body 231 includes a first portion 2311 and a second portion 2312, which are disposed opposite each other along a third direction Z. A reinforcing portion 233 is disposed between the first portion 2311 and the second portion 2312. The reinforcing portion 233 also includes a reinforcing body 2333, which is connected between a first connecting end 2331 and a second connecting end 2332. At least a portion of the reinforcing body 2333 is connected to the first portion 2311, and the second connecting end 2332 is connected to the second portion 2312.

[0120] For example, the reinforcing body 2333 may be partially connected to the first part 2311, or it may be entirely connected to the first part 2311.

[0121] By strengthening the effective connection between the main body 2333 and the first part 2311, and the effective connection between the second connection end 2332 and the second part 2312, when the load is subjected to external load, the load can be reasonably distributed between the first part 2311 and the second part 2312, reducing the phenomenon of local stress concentration and helping to improve the overall structural strength of the load.

[0122] In some embodiments, the reinforced body 2333, the first connecting end 2331, and the second connecting end 2332 are integrally formed, which can simplify the manufacturing process.

[0123] In some embodiments, the first connecting portion 232 is connected to the first portion 2311, and the second connecting portion 232 is connected to the second portion 2312.

[0124] In some embodiments, the first beam 221 further includes a third sidewall 2216, and a first cavity 2211 is located on the side of the third sidewall 2216 along the third direction Z. The third sidewall 2216 is connected to the first sidewall 2212, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The third sidewall 2216 has a first connecting hole 22161, which communicates with the first cavity 2211 and has an internal thread. The housing 20 also includes a first plate 24, which is disposed on the side of the frame 22 along the third direction Z. The first plate 24 is connected to the first beam 221 through the first connecting hole 22161.

[0125] By machining internal threads directly into the first connecting hole 22161 of the third sidewall 2216, the first plate 24 can be directly fixed to the first beam 221 by threaded connection, without the need for additional connecting parts such as rivet nuts on the third sidewall 2216. This simplifies the structure of the housing 20, reduces the number of parts, reduces the weight of the housing 20, and helps to improve the energy density of the battery device 2.

[0126] In some embodiments, the internal thread may be machined in the first connecting hole 22161 by a hot melt drilling process.

[0127] In some embodiments, the number of first connection holes 22161 is multiple, and the multiple first connection holes 22161 are spaced apart along the first direction X.

[0128] In some embodiments, the first beam 221 further includes a second sidewall 2213 and a first reinforcing rib 2214. The second sidewall 2213 and the first sidewall 2212 are disposed opposite each other along the second direction Y. A third sidewall 2216 is connected between the first sidewall 2212 and the second sidewall 2213. The first reinforcing rib 2214 is disposed in the first cavity 2211 and connected between the first sidewall 2212 and the second sidewall 2213. The first cavity 2211 includes a first sub-cavity 22111 and a second sub-cavity 22112. The first sub-cavity 22111 and the second sub-cavity 22112 are respectively disposed on both sides of the first reinforcing rib 2214 along the third direction Z. A first connecting hole 22161 communicates with the first sub-cavity 22111. The first sidewall 2212 has a through hole 22121, which communicates with the second sub-cavity 22112 and the receiving space 21.

[0129] The first reinforcing rib 2214 in this embodiment can separate the first sub-cavity 22111 and the second sub-cavity 22112. Even if the seal at the first connecting hole 22161 fails, water vapor, dust and other pollutants from the external environment will enter the first sub-cavity 22111 and will be blocked by the first reinforcing rib 2214, making it difficult for them to further enter the second sub-cavity 22112. This can effectively reduce the amount of water vapor, dust and other pollutants from the external environment entering the accommodating space 21 through the through hole 22121, which helps to improve the overall reliability of the battery device 2.

[0130] In some embodiments, the first beam 221 further includes a fourth sidewall 2217, which is disposed opposite to the third sidewall 2216 along the third direction Z, and is connected to the first sidewall 2212. The fourth sidewall 2217 has a second connecting hole 22171, which communicates with the first cavity 2211 and has an internal thread. The housing 20 also includes a second plate 25, which is disposed on the side of the frame 22 away from the first plate 24 along the third direction Z, and is connected to the first beam 221 through two connecting holes.

[0131] By machining internal threads directly into the second connecting hole 22171 of the fourth side wall 2217, the second plate 25 can be directly fixed to the first beam 221 by threaded connection, eliminating the need for additional connecting parts such as rivet nuts on the fourth side wall 2217. This simplifies the structure of the housing 20, reduces the number of parts, lowers the weight of the housing 20, and helps to improve the energy density of the battery device 2.

[0132] In some embodiments, the internal thread may be machined in the second connecting hole 22171 by a hot melt drilling process.

[0133] In some embodiments, the number of second connection holes 22171 is multiple, and the multiple second connection holes 22171 are spaced apart along the first direction X.

[0134] In some embodiments, the first beam 221 further includes a second sidewall 2213, a first reinforcing rib 2214, and a second reinforcing rib 2215. The second sidewall 2213 is disposed opposite to the first sidewall 2212 along the second direction Y. A third sidewall 2216 is connected between the first sidewall 2212 and the second sidewall 2213. A fourth sidewall 2217 is connected between the first sidewall 2212 and the second sidewall 2213. The first reinforcing rib 2214 is disposed in the first cavity 2211 and connected between the first sidewall 2212 and the second sidewall 2213. The second reinforcing rib 2215 is disposed in the first cavity 2211 and connected between the first sidewall 2212 and the second sidewall 2213. The first cavity 2211 includes a first sub-cavity 22111, a second sub-cavity 22112, and a third sub-cavity 22113. The first sub-cavity 22111 is located between the third side wall 2216 and the first reinforcing rib 2214. The second sub-cavity 22112 is located between the first reinforcing rib 2214 and the second reinforcing rib 2215. The third sub-cavity 22113 is located between the second reinforcing rib 2215 and the fourth side wall 2217. The first connecting hole 22161 communicates with the first sub-cavity 22111, and the second connecting hole 22171 communicates with the third sub-cavity 22113. The first side wall 2212 has a through hole 22121, which connects the second sub-cavity 22112 and the receiving space 21.

[0135] The first reinforcing rib 2214 in this embodiment can separate the first sub-cavity 22111 and the second sub-cavity 22112. Even if the seal at the first connecting hole 22161 fails, water vapor, dust, and other pollutants from the external environment entering the first sub-cavity 22111 will be blocked by the first reinforcing rib 2214 and will have difficulty further entering the second sub-cavity 22112. This effectively reduces the entry of water vapor, dust, and other pollutants from the external environment into the receiving space 21 through the through hole 22121. The second reinforcing rib 2215 can separate the second sub-cavity 22112 and the third sub-cavity 22113. Even if the seal at the second connecting hole 22171 fails, water vapor, dust, and other pollutants from the external environment entering the third sub-cavity 22113 will be blocked by the second reinforcing rib 2215 and will have difficulty further entering the second sub-cavity 22112. This effectively reduces the entry of water vapor, dust, and other pollutants from the external environment into the receiving space 21 through the through hole 22121.

[0136] For example, one of the first plate 24 and the second plate 25 is a top cover, and the other of the first plate 24 and the second plate 25 is a bottom cover.

[0137] In some embodiments, the first plate 24 is a top cover and the second plate 25 is a bottom cover.

[0138] In some embodiments, the second beam 222 is a solid structure.

[0139] For example, the cross-sectional shape of the second beam 222 perpendicular to the second direction Y can be, but is not limited to, a straight line, a C-shape, or an I-shape.

[0140] By making the second beam 222 a solid structure, the internal cavity structure can be eliminated, making the overall structure of the second beam 222 more compact. While the second beam 222 meets the strength requirements, it is beneficial to reduce the overall volume of the box 20 and improve the energy density of the battery device 2.

[0141] In some embodiments, the second beam 222 includes a first wall 2221 and two second walls 2222. The two second walls 2222 are respectively connected to the two ends of the first wall 2221 along the third direction Z, and the second walls 2222 are bent relative to the first wall 2221 in a direction away from the receiving space 21, with the first direction X, the second direction Y and the third direction Z being perpendicular to each other.

[0142] In other words, the cross-sectional shape of the second beam 222 perpendicular to the second direction Y is C-shaped.

[0143] By setting the second beam 222 as a C-shaped beam, the bending stiffness and structural strength of the second beam 222 can be improved without significantly increasing the amount of material used. At the same time, the two second walls 2222 bend away from the receiving space 21, which can reduce the encroachment on the receiving space 21 and improve the effective utilization rate of the receiving space 21.

[0144] In some embodiments, the first wall 2221 and the second wall 2222 are integrally formed, which can simplify the manufacturing process and reduce costs.

[0145] In some embodiments, the housing 20 includes two first beams 221 and two second beams 222. The two first beams 221 are arranged opposite each other along the second direction Y, and the two second beams 222 are arranged opposite each other along the first direction X. Each second beam 222 is connected between the first sidewalls 2212 of the two first beams 221.

[0146] In some embodiments, the battery device 2 further includes a connector, and a mounting port is provided on the second beam 222, which extends through the second beam 222 along the second direction Y, and the connector is mounted in the mounting port.

[0147] For example, the connector may be, but is not limited to, a power connector, a signal connector, or an integrated connector, etc.

[0148] The projection shape of the mounting opening along the second direction Y can be, but is not limited to, a rectangle, a circle, or a trapezoid.

[0149] A sealing design is provided between the connector and the mounting port to reduce the risk of contaminants such as moisture and dust from the external environment entering the housing space 21 through the mounting port.

[0150] The above technical solution integrates the connector into the second beam 222, reducing the need for additional installation structures and making the housing 20 more compact. Furthermore, the first sidewall 2212 separates the first cavity 2211 from the second beam 222, allowing the first cavity 2211 to be independently positioned relative to the second beam 222. Therefore, when airtightness issues arise at the mounting opening, moisture, dust, and other contaminants from the external environment will not further intrude into the first cavity 2211, significantly reducing the possibility of external contamination spreading.

[0151] According to some embodiments of this application, this application also provides an electrical device, including a battery device 2 of any of the above schemes, the battery device 2 being used to store or provide electrical energy.

[0152] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. All technical features and optional technical features of this application can be combined to form new technical solutions.

[0153] To better understand the battery device 2 provided in the embodiments of this application, based on the same inventive concept, an embodiment of the battery device 2 in practical application is provided here for description.

[0154] This application provides a battery device 2, which includes a battery cell 10 and a housing 20. The housing 20 includes a frame 22, a mounting member 23, a first plate 24 and a second plate 25. The frame 22 surrounds and forms a receiving space 21, in which the battery cell 10 is received. The frame 22 includes a first beam 221 and a second beam 222. The first beam 221 extends along a first direction X, and the second beam 222 extends along a second direction Y.

[0155] The first beam 221 has a first cavity 2211 inside. The first beam 221 includes a first side wall 2212, a second side wall 2213, a third side wall 2216, a fourth side wall 2217, a first reinforcing rib 2214, and a second reinforcing rib 2215. The first cavity 2211 is located on the side of the first side wall 2212 facing away from the receiving space 21. The second side wall 2213 is arranged opposite to the first side wall 2212 along the second direction Y. The third side wall 2216 and the fourth side wall 2217 are arranged opposite to each other along the third direction Z. The third side wall 2216 is connected between the first side wall 2212 and the second side wall 2213, and the fourth side wall 2217 is connected between the first side wall 2212 and the second side wall 2213. The second beam 222 is connected to the first side wall 2212, and the mounting component 23 is connected to the second side wall 2213. In the same plane perpendicular to the second direction Y, the orthographic projection of the second beam 222 is located within the orthographic projection of the first side wall 2212.

[0156] The second beam 222 is a solid structure. The second beam 222 includes a first wall 2221 and two second walls 2222. The two second walls 2222 are respectively connected to the two ends of the first wall 2221 along the third direction Z. The second walls 2222 are bent relative to the first wall 2221 in the direction away from the receiving space 21. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0157] The first reinforcing rib 2214 is disposed in the first cavity 2211 and connected between the first side wall 2212 and the second side wall 2213. The second reinforcing rib 2215 is disposed in the first cavity 2211 and connected between the first side wall 2212 and the second side wall 2213. The first reinforcing rib 2214 and the second reinforcing rib 2215 are spaced apart along the third direction Z.

[0158] The first cavity 2211 includes a first sub-cavity 22111, a second sub-cavity 22112, and a third sub-cavity 22113. The first sub-cavity 22111 and the second sub-cavity 22112 are respectively disposed on both sides of the first reinforcing rib 2214 along the third direction Z. The second sub-cavity 22112 is located between the first reinforcing rib 2214 and the second reinforcing rib 2215. The third sub-cavity 22113 is located on the side of the second reinforcing rib 2215 facing away from the second sub-cavity 22112.

[0159] The first sidewall 2212 has a through hole 22121, which connects the second sub-cavity 22112 and the accommodating space 21. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0160] The mounting component 23 includes a main body 231, a connecting part 232, and a reinforcing part 233. The main body 231 is connected to the second side wall 2213 via the connecting part 232. The reinforcing part 233 includes a first connecting end 2331 and a second connecting end 2332. The first connecting end 2331 is connected to the second side wall 2213, and the second connecting end 2332 is connected to the main body 231. In the same plane perpendicular to the second direction Y, the orthographic projection of the connecting part 232 is spaced apart from the orthographic projection of the second sub-cavity 22112, and the orthographic projection of the first connecting end 2331 is also spaced apart from the orthographic projection of the second sub-cavity 22112.

[0161] The connecting part 232 includes a first connecting body 2321 and a second connecting body 2322. In the same plane perpendicular to the first direction X, the orthographic projection of the first connecting body 2321 is located within the orthographic projection of the first sub-cavity 22111, and the orthographic projection of the second connecting body 2322 is located within the orthographic projection of the third sub-cavity 22113.

[0162] The main body 231 includes a first part 2311 and a second part 2312, which are disposed opposite each other along a third direction Z. A reinforcing part 233 is disposed between the first part 2311 and the second part 2312. The reinforcing part 233 also includes a reinforcing body 2333, which is connected between a first connecting end 2331 and a second connecting end 2332. At least a portion of the reinforcing body 2333 is connected to the first part 2311, and the second connecting end 2332 is connected to the second part 2312.

[0163] The third sidewall 2216 has a first connecting hole 22161, which communicates with the first cavity 2211 and has an internal thread. The first plate 24 is located on the side of the frame 22 along the third direction (Z), and is connected to the first beam 221 through the first connecting hole 22161. The fourth sidewall 2217 has a second connecting hole 22171, which communicates with the first cavity 2211 and has an internal thread. The second plate 25 is located on the side of the frame 22 away from the first plate 24 along the third direction (Z), and is connected to the first beam 221 through two connecting holes.

[0164] By connecting the second beam 222 to the first sidewall 2212, the second beam 222 is effectively decoupled from the first cavity 2211 inside the first beam 221. Therefore, when the second beam 222 experiences airtightness issues, pollutants such as moisture and dust from the external environment will only affect the second beam 222 itself and will not further intrude into the first cavity 2211, thus significantly reducing the possibility of external pollution spreading.

[0165] Therefore, the above technical solution can effectively block the pollution propagation path between different beams of the frame 22 of the box 20 without increasing the structural complexity, improve the airtightness of the frame 22 of the box 20, and thus improve the overall reliability of the battery device 2.

[0166] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Battery cell; The housing includes a frame that encloses a receiving space in which the battery cell is received. The frame includes a first beam and a second beam. The first beam extends along a first direction, and the second beam extends along a second direction. The first direction and the second direction intersect. The first beam has a first cavity inside, and the first beam includes a first sidewall. The first cavity is located on the side of the first sidewall facing away from the receiving space. The second beam is connected to the first sidewall. In the same plane perpendicular to the second direction, the orthographic projection of the second beam is located within the orthographic projection of the first sidewall.

2. The battery device according to claim 1, characterized in that, The first beam further includes a second sidewall, which is disposed opposite to the first sidewall along the second direction; The enclosure also includes a mounting bracket, which is connected to the second side wall.

3. The battery device according to claim 2, characterized in that, The first beam further includes a first reinforcing rib, which is disposed within the first cavity and connected between the first side wall and the second side wall; The first cavity includes a first sub-cavity and a second sub-cavity, which are respectively disposed on both sides of the first reinforcing rib along a third direction. The first sidewall has a through hole, which connects the second sub-cavity and the receiving space. The first direction, the second direction and the third direction are perpendicular to each other. The mounting component includes a main body and a connecting part. The main body is connected to the second side wall through the connecting part. In the same plane perpendicular to the second direction, the orthographic projection of the connecting part and the orthographic projection of the second sub-cavity are spaced apart.

4. The battery device according to claim 3, characterized in that, The first beam further includes a second reinforcing rib, which is disposed in the first cavity and connected between the first side wall and the second side wall. The second sub-cavity is located between the first reinforcing rib and the second reinforcing rib. The first cavity further includes a third sub-cavity, which is located on the side of the second reinforcing rib opposite to the second sub-cavity; The connecting part includes a first connecting body and a second connecting body. In the same plane perpendicular to the first direction, the orthographic projection of the first connecting body is located within the orthographic projection of the first sub-cavity, and the orthographic projection of the second connecting body is located within the orthographic projection of the third sub-cavity.

5. The battery device according to claim 3, characterized in that, The mounting component also includes a reinforcing part, which includes a first connecting end and a second connecting end. The first connecting end is connected to the second side wall, and the second connecting end is connected to the main body. In the same plane perpendicular to the first direction, the orthographic projection of the first connecting end and the orthographic projection of the second sub-cavity are spaced apart.

6. The battery device according to claim 5, characterized in that, The main body includes a first part and a second part, the first part and the second part are disposed opposite to each other along the third direction, and the reinforcing part is disposed between the first part and the second part; The reinforcing part further includes a reinforcing body, which is connected between the first connecting end and the second connecting end. At least a portion of the reinforcing body is connected to the first part, and the second connecting end is connected to the second part.

7. The battery device according to claim 1, characterized in that, The first beam also includes a third sidewall, the first cavity is located on one side of the third sidewall along a third direction, the third sidewall is connected to the first sidewall, and the first direction, the second direction and the third direction are perpendicular to each other; The third sidewall is provided with a first connecting hole, which communicates with the first cavity, and the first connecting hole is provided with an internal thread. The housing also includes a first plate, which is disposed on one side of the frame along the third direction, and the first plate is connected to the first beam through the first connecting hole.

8. The battery device according to claim 7, characterized in that, The first beam further includes a second sidewall and a first reinforcing rib. The second sidewall and the first sidewall are disposed opposite to each other along the second direction. The third sidewall is connected between the first sidewall and the second sidewall. The first reinforcing rib is disposed in the first cavity and connected between the first sidewall and the second sidewall. The first cavity includes a first sub-cavity and a second sub-cavity, which are respectively disposed on both sides of the first reinforcing rib along the third direction. The first connecting hole communicates with the first sub-cavity, and the first sidewall has a through hole that communicates with the second sub-cavity and the accommodating space.

9. The battery device according to claim 7, characterized in that, The first beam also includes a fourth sidewall, which is disposed opposite to the third sidewall along the third direction, and the fourth sidewall is connected to the first sidewall; The fourth sidewall is provided with a second connecting hole, which communicates with the first cavity, and the second connecting hole is provided with an internal thread. The housing also includes a second plate, which is disposed on the side of the frame away from the first plate along the third direction, and the second plate is connected to the first beam through the two connecting holes.

10. The battery device according to claim 9, characterized in that, The first beam further includes a second sidewall, a first reinforcing rib, and a second reinforcing rib. The second sidewall is disposed opposite to the first sidewall along the second direction. The third sidewall is connected between the first sidewall and the second sidewall. The fourth sidewall is connected between the first sidewall and the second sidewall. The first reinforcing rib is disposed in the first cavity and connected between the first sidewall and the second sidewall. The second reinforcing rib is disposed in the first cavity and connected between the first sidewall and the second sidewall. The first cavity includes a first sub-cavity, a second sub-cavity, and a third sub-cavity. The first sub-cavity is located between the third sidewall and the first reinforcing rib. The second sub-cavity is located between the first reinforcing rib and the second reinforcing rib. The third sub-cavity is located between the second reinforcing rib and the fourth sidewall. The first connecting hole communicates with the first sub-cavity, and the second connecting hole communicates with the third sub-cavity. The first sidewall has a through hole that communicates with the second sub-cavity and the accommodating space.

11. The battery device according to claim 1, characterized in that, The second beam is a solid structure.

12. The battery device according to claim 1, characterized in that, The second beam includes a first wall and two second walls, which are respectively connected to the two ends of the first wall along a third direction. The second walls are bent relative to the first wall in a direction away from the receiving space, and the first direction, the second direction and the third direction are perpendicular to each other.

13. The battery device according to claim 1, characterized in that, The box body includes two first beams and two second beams. The two first beams are arranged opposite each other along the second direction, and the two second beams are arranged opposite each other along the first direction. Each second beam is connected between the first sidewalls of the two first beams.

14. The battery device according to any one of claims 1-13, characterized in that, The battery device further includes a connector, and the second beam has an installation port that extends through the second beam along the second direction. The connector is installed in the installation port.

15. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-14, the battery device being used to store or provide electrical energy.

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