A battery device and an electric device

Abstract

The application discloses a battery device and a power utilization device. The battery device comprises a battery cell, a box body and a box cover; the box body comprises a side frame; the box cover is connected with the side frame, and the box cover cooperates with the box body to form a containing cavity, and the battery cell is arranged in the containing cavity; the battery device further comprises a first connecting assembly and a sealing gasket; the side frame is provided with a connecting portion and a separation cavity, at least part of the separation cavity is located between the containing cavity and the connecting portion, the connecting portion is covered by the box cover, the first connecting assembly is connected to the connecting portion and the box cover, and the sealing gasket is clamped between the box cover and the side frame. Since at least part of the separation cavity is located between the containing cavity and the connecting portion, the distance between the first connecting assembly and the containing cavity is farther, the risk that the sealing failure of the containing cavity is caused by the airflow directly entering the containing cavity from the side of the containing cavity is reduced through the separation cavity, meanwhile, the sealing gasket can improve the sealing effect of the side of the containing cavity, so that the sealing property and the reliability of the battery device are 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] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of the energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle capability, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] Battery devices can accommodate individual battery cells through a housing cavity, and often require connection components to fix the battery device in place. However, the existing connection components are too close to the housing cavity, resulting in poor isolation. Airflow can easily enter the housing cavity from the side, causing the housing cavity to fail to seal against the outside environment. Therefore, how to improve the sealing performance of battery devices has become an urgent technical problem to be solved. Utility Model Content

[0004] The main objective of this application is to provide a battery device and an electrical device that address the technical problem of poor sealing in existing battery devices.

[0005] To address the aforementioned issues, this application provides a battery device comprising a battery cell, a housing body, and a housing cover. The housing body includes a side frame; the housing cover is connected to the side frame, and the housing cover and housing body cooperate to form a receiving cavity, in which the battery cell is disposed. The battery device further includes a first connecting component and a sealing gasket. The side frame has a connecting portion and an isolation cavity, at least a portion of which is located between the receiving cavity and the connecting portion. The housing cover covers the connecting portion, the first connecting component connects the connecting portion and the housing cover, and the sealing gasket is sandwiched between the housing cover and the side frame. Thus, the main body of the casing and the casing cover cooperate to form a receiving cavity to accommodate the battery cells. The side frame of the main body of the casing is connected to the casing cover through the connecting part and the first connecting assembly. Since at least part of the isolation cavity is located between the receiving cavity and the connecting part, the distance between the first connecting assembly and the receiving cavity is greater. The isolation cavity reduces the risk of airflow directly entering the receiving cavity from the side, causing the receiving cavity to fail to seal. At the same time, the sealing gasket is sandwiched between the casing cover and the side frame to improve the sealing effect of the side of the receiving cavity, thereby improving the sealing performance and reliability of the battery device.

[0006] In some embodiments, the side frame further includes reinforcing ribs located within the isolation cavity, which divide the isolation cavity into multiple sub-isolation cavities. This enhances the structural strength of the side frame through the reinforcing ribs, while the division of the isolation cavity into multiple sub-isolation cavities facilitates better separation of the receiving cavity and the connecting portion. Furthermore, the sub-isolation cavities reduce the risk of airflow directly entering the receiving cavity from the side, leading to sealing failure and improving the sealing performance and reliability of the battery device.

[0007] In some embodiments, the plurality of sub-isolation cavities are divided into at least two rows in a first direction from the inside of the receiving cavity to the outside of the receiving cavity. This reduces the molding difficulty of the plurality of sub-isolation cavities, while saving space and reducing production costs.

[0008] In some embodiments, at least two rows of sub-isolation cavities include a first cavity row and a second cavity row. The first cavity row is closer to the receiving cavity than the second cavity row in a first direction, and closer to the housing cover than the second cavity row in a second direction intersecting the first direction, so that a gap is formed between the second cavity row and the housing cover, and the connecting portion is connected in the gap between the second cavity row and the housing cover. Thus, by setting the first cavity row closer to the housing cover than the second cavity row, it is easier to accommodate the connecting portion through the gap between the second cavity row and the housing cover, reducing the molding difficulty of the battery device and saving the volume of the battery device.

[0009] In some embodiments, the connecting portion has a cavity, and the first connecting component is connected to the connecting portion and the housing cover and extends into the cavity. Therefore, compared to making the connecting portion solid, by having a cavity in the connecting portion and the first connecting component connected to the connecting portion and extending into the cavity, production costs can be saved, the weight of the battery device can be reduced, and the assembly difficulty between the first connecting component and the connecting portion can be reduced, thus improving production efficiency.

[0010] In some embodiments, the connecting portion is provided with a plurality of cavities, which are spaced apart along the direction in which the connecting portion extends. The battery device includes a plurality of first connecting components, and each cavity corresponds to at least one first connecting component. Therefore, by arranging the plurality of cavities spaced apart along the direction in which the connecting portion extends, and each cavity corresponding to at least one first connecting component, it is convenient to assemble and connect the plurality of first connecting components along the direction in which the connecting portion extends. This improves the connection stability between the plurality of first connecting components and the connecting portion, while reducing the risk of simultaneous sealing failure of the plurality of cavities, thus improving the sealing performance of the battery device.

[0011] In some embodiments, the cavity extends along the direction of the connecting portion, and the battery device includes a plurality of first connecting components. The plurality of first connecting components are spaced apart along the direction of the connecting portion, and each of the plurality of first connecting components is connected to the connecting portion and the housing cover and extends into the cavity. Thus, by having the cavity extend along the direction of the connecting portion, and having the plurality of first connecting components connected to the connecting portion and the housing cover and extending into the cavity, the structural strength of the side frame is improved, while the overall weight of the battery device is reduced.

[0012] In some embodiments, the sealing gasket is at least partially sandwiched between the side frame corresponding to the connecting portion and the housing cover, and / or the sealing gasket is at least partially sandwiched between the side frame corresponding to the isolation cavity and the housing cover. Therefore, by at least partially sandwiching the sealing gasket between the side frame corresponding to the connecting portion and the housing cover, the sealing performance between the side frame corresponding to the connecting portion and the housing cover can be further improved; similarly, by at least partially sandwiching the sealing gasket between the side frame corresponding to the isolation cavity and the housing cover, the sealing performance between the side frame corresponding to the isolation cavity and the housing cover can be further improved.

[0013] In some embodiments, the battery device includes a base plate and a second connecting assembly. The base plate is connected to the side frame opposite to the housing cover, and the second connecting assembly connects the base plate and the side frame. This facilitates improved connection stability between the base plate and the side frame via the second connecting assembly, while simultaneously enhancing the structural strength of the battery device through the base plate.

[0014] In some embodiments, the second connecting assembly is connected to the base plate and the side frame and extends into the isolation cavity. This further improves the connection stability between the base plate and the side frame, reducing the risk of battery device sealing failure due to connection failure between the base plate and the side frame.

[0015] In some embodiments, the main body of the housing also includes a protective plate, which is disposed on the side of the bottom plate opposite to the receiving cavity, and is fixedly connected to the side frame. Thus, by placing the protective plate on the side of the bottom plate opposite to the receiving cavity, the cooperation between the protective plate and the bottom plate improves the structural strength of the battery device, while also enhancing the sealing performance of the battery device.

[0016] To address the aforementioned problems, this application also provides an electrical device, which includes the aforementioned battery device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a vehicle according to one or more embodiments of this application;

[0019] Figure 2 This is an exploded structural diagram of a battery device according to one or more embodiments of this application;

[0020] Figure 3 This is a first structural schematic diagram of a battery device according to one or more embodiments of this application;

[0021] Figure 4 It is based on Figure 3 A cross-sectional view of the battery device shown along the AA direction;

[0022] Figure 5 This is a cross-sectional schematic diagram of a battery device according to one or more embodiments of this application;

[0023] Figure 6 It is based on Figure 5 A partially enlarged schematic diagram of area B of the battery device shown;

[0024] Figure 7 This is a schematic diagram of the structure of a first connection component of a battery device according to one or more embodiments of this application;

[0025] Figure 8 This is a second structural schematic diagram of a battery device according to one or more embodiments of this application.

[0026] Reference numerals: Vehicle 1; Battery unit 2; Controller 3; Motor 4; Battery cell 10; Main body of the casing 20; Side frame 21; Connecting part 211; Air-proof cavity 2111; Isolation cavity 212; Sub-isolation cavity 2121; First cavity row 2122; Second cavity row 2123; Reinforcing rib 213; Protective plate 22; Casing cover 30; Receiving cavity 40; Sub-receiving cavity 41; First connecting assembly 50; External fastening part 51; Middle transition part 52; Internal fastening part 53; Base plate 60; Second connecting assembly 70; Sealing gasket 80; Middle crossbeam 90; First direction x1; Second direction x2. Detailed Implementation

[0027] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0029] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0032] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0033] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0034] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0035] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0036] Battery devices can accommodate individual battery cells through a housing cavity, and often require connection components to fix the battery device in place. However, the existing connection components are too close to the housing cavity, resulting in poor isolation. Airflow can easily enter the housing cavity from the side, causing the housing cavity to fail to seal against the outside environment. Therefore, how to improve the sealing performance of battery devices has become an urgent technical problem to be solved.

[0037] To address the technical problems existing in related technologies, a battery device and an electrical device are provided. The battery device has a casing cover connected to a side frame of the casing body. The casing cover and casing body cooperate to form a receiving cavity to accommodate individual battery cells. The side frame has a connecting portion and an isolation cavity. At least a portion of the isolation cavity is located between the receiving cavity and the connecting portion. The casing cover covers at least a portion of the connecting portion. A first connecting assembly connects the connecting portion and the casing cover. A sealing gasket is sandwiched between the casing cover and the side frame. Because at least a portion of the isolation cavity is located between the receiving cavity and the connecting portion, the risk of airflow directly entering the receiving cavity from the side, leading to sealing failure, can be reduced through the isolation cavity. Simultaneously, the sealing gasket sandwiched between the casing cover and the side frame improves the sealing effect of the receiving cavity's side, thereby improving the sealing performance and reliability of the battery device.

[0038] Batteries, as discussed in this field, can be categorized into primary batteries and rechargeable batteries based on whether they are rechargeable. Primary batteries, also known as "use-and-discard" batteries or galvanic cells, cannot be recharged after their charge is depleted and must be discarded. Rechargeable batteries, also called secondary batteries or rechargeable batteries, differ from primary batteries in their manufacturing materials and processes. Their advantage lies in their ability to be cycled multiple times after charging, and their output current capacity is higher than most primary batteries. Common types of rechargeable batteries include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries are lightweight, have a large capacity (1.5 to 2 times that of a nickel-metal hydride battery of the same weight), no memory effect, and a very low self-discharge rate, thus enjoying widespread use despite their relatively high price. Lithium-ion batteries are also widely used in pure electric vehicles and hybrid vehicles. While the capacity of lithium-ion batteries used in these applications is relatively lower, they offer a larger output and charging current, and a longer lifespan, but at a higher cost.

[0039] The batteries described in the embodiments of this application refer to rechargeable batteries or disposable batteries. The embodiments disclosed in this application will be described below primarily using lithium-ion batteries as an example. It should be understood that the embodiments disclosed in this application are applicable to any other suitable type of rechargeable battery. The batteries mentioned in the embodiments disclosed in this application can be directly or indirectly used in suitable devices to power those devices.

[0040] This application provides an electrical device, which may include, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc. The electrical device may include a battery device or a battery housing, which can provide electrical energy to achieve the corresponding function.

[0041] Taking an electric vehicle as an example, an electric vehicle may include a battery device or a battery box.

[0042] Please refer to Figure 1 , Figure 1 This is a structural schematic diagram of a vehicle according to one or more embodiments of this application.

[0043] Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 2 is installed inside vehicle 1, and the battery device 2 can be located at the bottom, front, or rear of vehicle 1. The battery device 2 can be used to power vehicle 1; for example, it can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 3 and a motor 4. The controller 3 controls the battery device 2 to supply power to the motor 4, for example, to meet the power needs of vehicle 1 during starting, navigation, and driving.

[0044] 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.

[0045] To improve the performance of electrical devices, this application also provides a battery device, see [link to relevant documentation]. Figure 2 , Figure 2 This is an exploded structural diagram of a battery device according to one or more embodiments of this application.

[0046] The shape of the battery device 2 may include, but is not limited to, a square, cylindrical or other arbitrary shapes.

[0047] In the battery device 2, there can be multiple battery cells 10, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 10 are connected in both series and parallel configurations. Multiple battery cells 10 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 10 is housed within the receiving cavity 40. Alternatively, the battery device 2 can also consist of multiple battery cells 10 first connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed manner to form a whole, which is then housed within the battery. The battery device 2 may also include other structures; for example, the main body 20 of the housing may also include a busbar component for realizing the electrical connection between the multiple battery cells 10.

[0048] The battery cell 10 is manufactured using two methods: stacking and winding. Stacked cells offer uniform current collection, lower internal resistance, and higher specific power. However, to improve precision, extremely high precision is required for the molds, resulting in high equipment investment, complex processes, and low production efficiency. Winded cells are simpler to manufacture, with less stringent precision requirements for equipment during the sheet fabrication and assembly processes. They offer high production efficiency and lower costs. In terms of performance, wound cells possess excellent high and low temperature performance, very rapid charging, ultra-long lifespan, stable high output voltage, robust structure, and strong shock resistance.

[0049] A battery cell 10 refers to the smallest unit constituting a battery device 2. A battery cell 10 may include a housing, electrode assemblies, and other functional components. The housing assemblies form the internal environment of the battery cell 10 and isolate it from the external environment. It is understood that the housing assemblies provide support and protection for the components within the internal environment of the battery cell 10. Electrode assemblies are the components in the battery cell 10 where electrochemical reactions occur. The housing assemblies may contain one or more electrode assemblies. Electrode assemblies are mainly formed by winding or stacking positive and negative electrode plates, and typically, a separator is provided between the positive and negative electrode plates.

[0050] Combination Figures 3-4 , Figure 3 This is a first structural schematic diagram of a battery device according to one or more embodiments of this application; Figure 4 It is based on Figure 3 The diagram shows a cross-sectional view of the battery device along the AA direction.

[0051] The battery device 2 includes a battery cell 10, a housing body 20, and a housing cover 30. The housing body 20 includes a side frame 21. The housing cover 30 is connected to the side frame 21, and the housing cover 30 and the housing body 20 cooperate to form a receiving cavity 40, in which the battery cell 10 is disposed. The battery device 2 also includes a first connecting component 50 and a sealing gasket 80. The side frame 21 is provided with a connecting part 211 and an isolation cavity 212. At least a portion of the isolation cavity 212 is located between the receiving cavity 40 and the connecting part 211. The housing cover 30 covers at least a portion of the connecting part 211. The first connecting component 50 is connected to the connecting part 211 and the housing cover 30. The sealing gasket 80 is sandwiched between the housing cover 30 and the side frame 21.

[0052] The main body 20 and the cover 30 can cooperate to form a receiving cavity 40 to provide support, fixation and protection for the battery cell 10. For example, the main body 20 can be a hollow structure with one end open, and the cover 30 can be a plate-like structure. The cover 30 covers the open side of the main body 20 so that the cover 30 and the main body 20 together define the receiving cavity 40; the main body 20 and the cover 30 can also be hollow structures with one side open, and the open side of the cover 30 covers the open side of the main body 20.

[0053] The first connecting component 50 may be, but is not limited to, rivet nuts and rivet bolts. The side frame 21 is provided with a connecting part 211, which is used to connect with the first connecting component 50. It is understood that the box cover 30 covers at least part of the connecting part 211, and the first connecting component 50 can be connected to both the connecting part 211 and the box cover 30 to connect the box body 20 and the box cover 30. It should be noted that the first connecting component 50 can be connected to the connecting part 211 and the box cover 30 in any direction. For example, taking the box body 20 as a hollow structure with one end open, the box cover 30 is a plate-shaped structure. The area of ​​the box cover 30 can match the opening area of ​​the box body 20. The first connecting component 50 can be sequentially connected to the box cover 30 and the connecting part 211 along the opening direction of the box body 20. Alternatively, the box cover 30 can include a main body and an edge part. The area of ​​the main body can match the opening area of ​​the box body 20. The edge part surrounds the main body and extends towards the box body 20 along the opening direction of the box body 20, so that at least part of the edge part is located in the lateral direction of the connecting part 211. The lateral direction refers to the direction perpendicular to the opening direction of the box body 20. In this case, the first connecting component 50 can be sequentially connected to the box cover 30 and the connecting part 211 along the lateral direction.

[0054] The side frame 21 is also provided with an isolation cavity 212. At least part of the isolation cavity 212 is located between the receiving cavity 40 and the connecting part 211. The isolation cavity 212 can be used to separate the receiving cavity 40 and the connecting part 211, thereby improving the airtightness between the receiving cavity 40 and the connecting part 211. It is understood that the connection between the first connecting component 50 and the connecting part 211 usually needs to be sealed, but the risk of sealing failure is high. If the side frame 21 is not provided with an isolation cavity 212, the receiving cavity 40 and the connecting part 211 are directly connected. Once the sealing between the first connecting component 50 and the connecting part 211 fails, the receiving cavity 40 will be directly connected to the external environment through the sealing failure of the connecting part 211 and the first connecting component 50, thereby causing the overall sealing failure of the receiving cavity 40. By providing an isolation cavity 212, and positioning at least a portion of the isolation cavity 212 between the receiving cavity 40 and the connecting portion 211, the isolation cavity 212 itself possesses excellent sealing properties. This separates the receiving cavity 40 from the connecting portion 211 and the first connecting assembly 50. Even if the seal between the first connecting assembly 50 and the connecting portion 211 fails, the receiving cavity 40 will not directly communicate with the external environment, allowing the isolation cavity 212 to maintain its sealing effect. Furthermore, separating the receiving cavity 40 and the connecting portion 211 by the isolation cavity 212 eliminates the need for sealing treatment at the connecting portion 211 and the first connecting assembly 50, reducing the use of consumable materials such as sealant and gaskets, saving production costs, and reducing the additional load on the first connecting assembly 50 caused by sealing treatment, thereby extending the service life of the battery device 2. It should be noted that the number and volume of the isolation cavities 212 can be set according to actual needs. For example, the isolation cavity 212 can be a single continuous cavity or multiple spaced cavities.

[0055] The battery assembly 2 also includes a sealing gasket 80, which is sandwiched between the housing cover 30 and the side frame 21. The sealing gasket 80 provides a seal between the housing cover 30 and the side frame 21, and can be, but is not limited to, strip-shaped or ring-shaped. Exemplarily, the sealing gasket 80 can be sandwiched between the housing cover 30 and the side frame 21 and surrounds the receiving cavity 40. The material of the sealing gasket 80 can be, but is not limited to, polytetrafluoroethylene, metal, or polyetherketone. The sealing gasket 80 may have a certain degree of elasticity so that when the sealing gasket 80 is sandwiched between the housing cover 30 and the side frame 21, it fits more tightly with the housing cover 30 and the side frame 21, thereby improving the sealing effect between the housing cover 30 and the side frame 21. In some application scenarios, the side frame 21 may be provided with a first receiving groove surrounding the receiving cavity 40, and the sealing gasket 80 is located in the first receiving groove. The depth of the first receiving groove is less than the thickness of the sealing gasket 80, and the shape of the first receiving groove may be similar to the shape of the sealing gasket 80. For example, both the first receiving groove and the sealing gasket 80 may be annular to facilitate the installation and positioning of the sealing gasket 80 through the first receiving groove. The housing cover 30 may also be provided with a second receiving groove surrounding the receiving cavity 40, and the sealing gasket 80 is located in the second receiving groove. The depth of the second receiving groove is less than the thickness of the sealing gasket 80, and the shape of the second receiving groove may be similar to the shape of the sealing gasket 80. For example, both the second receiving groove and the sealing gasket 80 may be annular to facilitate the installation and positioning of the sealing gasket 80 through the second receiving groove. Alternatively, the side frame 21 may have a first receiving groove, while the box cover 30 may have a second receiving groove. The sealing gasket 80 may be partially located in the first receiving groove and partially located in the second receiving groove. The sum of the depths of the first receiving groove and the second receiving groove may be less than the thickness of the sealing gasket 80, thereby further facilitating the installation and positioning of the sealing gasket 80 and improving the sealing effect.

[0056] Through the above embodiments, the main body 20 and the cover 30 cooperate to form a receiving cavity 40 to accommodate the battery cell 10. The side frame 21 of the main body 20 is connected to the cover 30 through the connecting part 211 and the first connecting component 50. Since at least part of the isolation cavity 212 is located between the receiving cavity 40 and the connecting part 211, the distance between the first connecting component 50 and the receiving cavity 40 is greater. The isolation cavity 212 reduces the risk of airflow directly entering the receiving cavity 40 from the side, causing the sealing of the receiving cavity 40 to fail. At the same time, the sealing gasket 80 is sandwiched between the cover 30 and the side frame 21 to improve the sealing effect of the side of the receiving cavity 40, thereby improving the sealing performance and reliability of the battery device 2.

[0057] In some embodiments, the sealing gasket 80 is at least partially sandwiched between the side frame 21 corresponding to the connecting portion 211 and the housing cover 30. Exemplarily, the sealing gasket 80 may be entirely sandwiched between the side frame 21 corresponding to the connecting portion 211 and the housing cover 30, or it may be partially sandwiched between the side frame 21 corresponding to the connecting portion 211 and the housing cover 30. Specifically, the orthographic projection of the sealing gasket 80 on the housing cover 30 at least partially coincides with the orthographic projection of the connecting portion 211 on the housing cover 30. Therefore, by at least partially sandwiching the sealing gasket 80 between the side frame 21 corresponding to the connecting portion 211 and the housing cover 30, the sealing performance between the side frame 21 corresponding to the connecting portion 211 and the housing cover 30 can be further improved.

[0058] In some embodiments, the sealing gasket 80 is at least partially sandwiched between the side frame 21 corresponding to the isolation cavity 212 and the box cover 30. Exemplarily, the sealing gasket 80 may be entirely sandwiched between the side frame 21 corresponding to the isolation cavity 212 and the box cover 30, or it may be partially sandwiched between the side frame 21 corresponding to the isolation cavity 212 and the box cover 30. Specifically, the orthographic projection of the sealing gasket 80 on the box cover 30 at least partially coincides with the orthographic projection of the side frame 21 corresponding to the isolation cavity 212 on the box cover 30. Therefore, by at least partially sandwiching the sealing gasket 80 between the side frame 21 corresponding to the isolation cavity 212 and the box cover 30, the sealing performance between the side frame 21 corresponding to the isolation cavity 212 and the box cover 30 can be further improved.

[0059] In some embodiments, the sealing gasket 80 is at least partially sandwiched between the side frame 21 corresponding to the connecting portion 211 and the housing cover 30, and at least partially sandwiched between the side frame 21 corresponding to the isolation cavity 212 and the housing cover 30. Specifically, the orthographic projection of the sealing gasket 80 on the housing cover 30 at least partially coincides with the orthographic projection of the connecting portion 211 on the housing cover 30, and at least partially coincides with the orthographic projection of the side frame 21 corresponding to the isolation cavity 212 on the housing cover 30. This further improves the sealing performance between the side frame 21 and the housing cover 30.

[0060] Combination Figure 5 , Figure 5 This is a cross-sectional schematic diagram of a battery device according to one or more embodiments of this application.

[0061] In some embodiments, the side frame 21 further includes a reinforcing rib 213 located within the isolation cavity 212, which divides the isolation cavity 212 into multiple sub-isolation cavities 2121. It is understood that the reinforcing rib 213 can improve the structural strength of the side frame 21, while also dividing the isolation cavity 212 into multiple sub-isolation cavities 2121, which are spaced apart from each other. For example, the reinforcing rib 213 can divide the isolation cavity 212 into, but is not limited to, two, three, four, five, or more sub-isolation cavities 2121. The reinforcing rib 213 can divide the isolation cavity 212 into multiple sub-isolation cavities 2121 arranged sequentially in a first direction x1 from inside the receiving cavity 40 to outside the receiving cavity 40, or it can divide the isolation cavity 212 into multiple sub-isolation cavities 2121 arranged sequentially in the opening direction of the housing body 20, depending on actual needs. It should be noted that the reinforcing rib 213 can airtightly separate the different sub-isolation cavities 2121. This means that even if some of the sub-isolation cavities 2121 suffer structural damage or sealing failure due to external impact, the airtightness of other intact sub-isolation cavities 2121 will not be affected, thereby further reducing the risk of sealing failure in the receiving cavity 40. It can be understood that at least a portion of each sub-isolation cavity 2121 may be located between the connecting portion 211 and the receiving cavity 40, or at least a portion of some sub-isolation cavities 2121 may be located between the connecting portion 211 and the receiving cavity 40. The volume and shape of the different sub-isolation cavities 2121 can be the same or different. Therefore, the structural strength of the side frame 21 can be improved by the reinforcing rib 213. At the same time, the reinforcing rib 213 divides the isolation cavity 212 into multiple sub-isolation cavities 2121, which facilitates better separation of the receiving cavity 40 and the connecting part 211. This further reduces the risk of airflow directly entering the receiving cavity 40 from the side and causing the receiving cavity 40 to fail to seal, thereby improving the sealing performance and reliability of the battery device 2.

[0062] In some embodiments, a plurality of sub-isolation cavities 2121 are divided into at least two columns along a first direction x1 from the interior to the exterior of the receiving cavity 40. Exemplarily, the plurality of sub-isolation cavities 2121 may be divided into two, three, or more columns along the first direction x1. The number of sub-isolation cavities 2121 in each column may be the same or different. Specifically, the reinforcing rib 213 may divide the isolation cavity 212 into four sub-isolation cavities 2121, which may be divided into two columns along the first direction x1, with each column including two sub-isolation cavities 2121; or the reinforcing rib 213 may divide the isolation cavity 212 into four sub-isolation cavities 2121, which may be divided into two columns along the first direction x1, with one column including one sub-isolation cavity 2121 and the other column including three sub-isolation cavities 2121. It should be noted that the reinforcing rib 213 can extend in a direction parallel to or intersecting the first direction x1 to separate different columns of sub-isolation cavities 2121. In some applications, the connecting portion 211 can be located on the side of the column of sub-isolation cavities 2121 furthest from the receiving cavity 40, away from the receiving cavity 40. For example, multiple sub-isolation cavities 2121 can be divided into two columns, and the connecting portion 211 can be located on the side of the column of sub-isolation cavities 2121 furthest from the receiving cavity 40. This reduces the molding difficulty of multiple sub-isolation cavities 2121, saves space, and reduces production costs.

[0063] In some embodiments, at least two rows of sub-isolation cavities 2121 include a first cavity row 2122 and a second cavity row 2123. The first cavity row 2122 is closer to the receiving cavity 40 in a first direction x1 than the second cavity row 2123. In a second direction x2 intersecting the first direction x1, the first cavity row 2122 is closer to the box cover 30 than the second cavity row 2123, so that a gap is formed between the second cavity row 2123 and the box cover 30. The connecting portion 211 is connected to the gap between the second cavity row 2123 and the box cover 30. For example, the multiple sub-isolation cavities 2121 can be divided into two columns. The column closer to the receiving cavity 40 in the first direction x1 is the first cavity column 2122, and the column farther away from the receiving cavity 40 is the second cavity column 2123. Alternatively, the multiple sub-isolation cavities 2121 can be divided into three columns. The column closest to the receiving cavity 40 in the first direction x1 is the first cavity column 2122, and any one of the other two columns is the second cavity column 2123. The column farthest from the receiving cavity 40 among the three sub-isolation cavities 2121 can be the second cavity column 2123, or the middle column among the three sub-isolation cavities 2121 can be the second cavity column 2123.

[0064] The second direction x2 intersects the first direction x1. Specifically, the second direction x2 can be oblique or perpendicular to the first direction x1. For example, the second direction x2 can be the direction from the side frame 21 to the box cover 30. In the second direction x2, the first cavity row 2122 is closer to the box cover 30 than the second cavity row 2123. It can be understood that a gap can be formed between the second cavity row 2123 and the box cover 30, thereby facilitating the connection part 211 to be connected in the gap. For ease of understanding, when the battery device 2 is placed on the ground with the main body 20 below and the cover 30 above, there is a height difference between the end face of the first cavity row 2122 near the cover 30 and the end face of the second cavity row 2123 near the cover 30. The end face of the first cavity row 2122 near the cover 30 is closer to the cover 30 than the end face of the second cavity row 2123 near the cover 30, thus creating a gap between the second cavity row 2123 and the cover 30. The connecting part 211 connects to this gap. It should be noted that when the cover 30 is entirely plate-shaped, the end face of the connecting part 211 near the cover 30 and the end face of the first cavity row 2122 near the cover 30 can be on the same plane, thus facilitating a better fit between the side frame 21 and the cover 30 and improving the sealing effect. Therefore, by setting the first cavity row 2122 closer to the housing cover 30 than the second cavity row 2123, it is easier to accommodate the connecting part 211 through the gap between the second cavity row 2123 and the housing cover 30, thereby reducing the molding difficulty of the battery device 2 and saving the volume of the battery device 2.

[0065] In some embodiments, the plurality of sub-isolation cavities 2121 are divided into at least two columns, with the connecting portion 211 in the same column as the column furthest from the receiving cavity 40 in the first direction x1. It is understood that the connecting portion 211 is in the same column as the column of sub-isolation cavities 2121 furthest from the receiving cavity 40 in the first direction x1. It should be noted that, compared to placing the connecting portion 211 on the side of the column of sub-isolation cavities 2121 furthest from the receiving cavity 40, thus forming a separate column for the connecting portion 211, aligning the connecting portion 211 with the column furthest from the receiving cavity 40 in the first direction x1 effectively saves space and volume of the side frame 21 in the first direction x1. Optionally, the number of sub-isolation cavities 2121 in the column furthest from the receiving cavity 40 can be less than the number of sub-isolation cavities 2121 in any other column, thereby reducing molding difficulty. For example, the reinforcing rib 213 can divide the isolation cavity 212 into four sub-isolation cavities 2121. The four sub-isolation cavities 2121 can be divided into two columns in the first direction x1, wherein the column furthest from the receiving cavity 40 includes one sub-isolation cavity 2121, and the column closer to the receiving cavity 40 includes three sub-isolation cavities 2121. The connecting portion 211 is in the same column as the column including one sub-isolation cavity 2121. Thus, by placing the connecting portion 211 in the same column as the column furthest from the receiving cavity 40 in the first direction x1, the space utilization rate of the side frame 21 in the first direction x1 is improved, and the production cost is reduced.

[0066] In some embodiments, the connecting portion 211 is provided with a cavity 2111, and the first connecting component 50 is connected to the connecting portion 211 and the housing cover 30 and extends into the cavity 2111. The cavity 2111 can be used to avoid the first connecting component 50, which is partially located on the side of the housing cover 30 away from the connecting portion 211, partially passing through the connecting portion 211 and the housing cover 30, and partially extending into the cavity 2111. It is understood that compared to making the connecting portion 211 solid, avoiding the first connecting component 50 by using the cavity 2111 can effectively reduce the weight of the side frame 21, save production costs, and at the same time, the cavity 2111 can provide sufficient installation space for the first connecting component 50, reduce the assembly difficulty of the first connecting component 50, and improve production efficiency. The cavity 2111 can be of any shape, specifically set according to actual needs. In some applications, the cavity 2111 also provides deformation space for the connecting part 211. When the side frame 21 is impacted by an external force, the cavity 2111 can deform to absorb kinetic energy, thereby improving the structural strength and reliability of the battery device 2. It should be noted that if the cavity 2111 is only provided in the connecting part 211 without the isolation cavity 212, once the seal between the first connecting component 50 and the connecting part 211 fails, gas in the external environment can easily enter the receiving cavity 40 directly through the gaps in the side wall of the cavity 2111, causing the battery device 2 to fail to seal. Therefore, the isolation cavity 212 can also make the distance between the cavity 2111 and the receiving cavity 40 greater, thereby improving the sealing effect of the receiving cavity 40. Therefore, compared to making the connecting part 211 solid, by providing a cavity 2111 in the connecting part 211, and the first connecting component 50 connecting the connecting part 211 and the housing cover 30 and extending into the cavity 2111, production costs can be saved, the weight of the battery device 2 can be reduced, and the assembly difficulty of the first connecting component 50 and the connecting part 211 can be reduced, thereby improving production efficiency.

[0067] In some embodiments, the connecting portion 211 is provided with a plurality of cavities 2111, which are spaced apart along the direction in which the connecting portion 211 extends. The battery device 2 includes a plurality of first connecting components 50, and each cavity 2111 corresponds to at least one first connecting component 50. Exemplarily, the connecting portion 211 may extend along the circumferential direction of the receiving cavity 40, and the plurality of cavities 2111 may also be spaced apart along the circumferential direction of the receiving cavity 40, thereby facilitating the connection of the plurality of first connecting components 50 to the housing cover 30 and the side frame 21 along the circumferential direction of the receiving cavity 40. Each cavity 2111 corresponds to at least one first connecting component 50. Exemplarily, each cavity 2111 may correspond to one first connecting component 50, that is, each first connecting component 50 may be independently connected to a separate cavity 2111; or each cavity 2111 may correspond to two first connecting components 50, that is, every two first connecting components 50 are connected to the same cavity 2111. Alternatively, some of the recessed cavities 2111 may correspond to one first connecting component 50, while others may correspond to two or more first connecting components 50. For example, taking a square frame as an example, at the corners of the square frame, each recessed cavity 2111 may correspond to one first connecting component 50, and on the four sides of the square frame, each recessed cavity 2111 may correspond to two or more first connecting components 50. Thus, by arranging multiple recessed cavities 2111 at intervals along the direction of extension of the connecting portion 211, with each recessed cavity 2111 corresponding to at least one first connecting component 50, it is convenient to assemble and connect multiple first connecting components 50 along the direction of extension of the connecting portion 211. This improves the connection stability between the multiple first connecting components 50 and the connecting portion 211, while reducing the risk of simultaneous sealing failure of multiple recessed cavities 2111, which is beneficial to improving the sealing performance of the battery device 2.

[0068] In some embodiments, the cavity 2111 extends along the direction of the connecting portion 211. The battery device 2 includes a plurality of first connecting components 50, which are spaced apart along the direction of the connecting portion 211. Each of the first connecting components 50 is connected to the connecting portion 211 and the housing cover 30 and extends into the cavity 2111. It is understood that by extending the cavity 2111 along the direction of the connecting portion 211, the cavity 2111 can form a continuous and complete cavity, thereby improving the structural strength of the connecting portion 211 and saving materials. For example, the connecting portion 211 can extend along the circumferential direction of the receiving cavity 40, and the venting cavity 2111 can also extend along the circumferential direction of the receiving cavity 40. Multiple first connecting components 50 can be spaced apart along the circumferential direction of the receiving cavity 40. It is understood that in this case, even if the seal between some of the first connecting components 50 and the connecting portion 211 fails, gas from the external environment can only enter the venting cavity 2111 and cannot enter the receiving cavity 40 through the isolation cavity 212. Thus, by extending the venting cavity 2111 along the direction of the connecting portion 211, multiple first connecting components 50 are connected to the connecting portion 211 and the housing cover 30 and extend into the venting cavity 2111, which facilitates improving the structural strength of the side frame 21 and reduces the overall weight of the battery device 2.

[0069] In some embodiments, the battery device 2 includes a base plate 60 and a second connecting assembly 70. The base plate 60 is connected to the side frame 21 on the side facing away from the housing cover 30, and the second connecting assembly 70 is connected to the base plate 60 and the side frame 21. The second connecting assembly 70 may include, but is not limited to, drill screws, bolts, fastening pins, etc. The second connecting assembly 70 connects the base plate 60 and the side frame 21, thereby improving the connection stability between the base plate 60 and the side frame 21. The base plate 60 can provide support and protection for the housing body 20, improving the structural strength of the battery device 2. Exemplarily, the side frame 21 can be a cylindrical shape without caps at both ends, such as a cylindrical tube, a prismatic tube, etc. The housing cover 30 can be shaped to match the open end of the side frame 21, and the shape of the base plate 60 can be shaped to match the other open end of the side frame 21, so as to seal the side of the side frame 21 facing away from the housing cover 30 through the base plate 60. For example, when the open end of the side frame 21 is square, the base plate 60 can also be square, so that the base plate 60 can be embedded in the end of the side frame 21 away from the housing cover 30, and the outer side wall of the base plate 60 abuts against the inner side wall of the side frame 21, thereby sealing the side of the side frame 21 away from the housing cover 30 through the base plate 60. In some applications, the battery device 2 also includes a cooling plate, which can also be disposed on the base plate 60, thereby facilitating the cooling plate to provide cooling for the battery cells 10. This facilitates the improvement of the connection stability between the base plate 60 and the side frame 21 through the second connecting assembly 70, while simultaneously improving the structural strength of the battery device 2 through the base plate 60.

[0070] In some embodiments, the second connecting component 70 is connected to the base plate 60 and the side frame 21 and extends into the isolation cavity 212. It is understood that the isolation cavity 212 can provide sufficient installation space for the second connecting component 70, reducing the assembly difficulty between the second connecting component 70 and the base plate 60 and improving the connection stability between the base plate 60 and the side frame 21. In some applications, the reinforcing rib 213 divides the isolation cavity 212 into multiple sub-isolation cavities 2121. The second connecting component 70 can extend into the sub-isolation cavities 2121. The number of second connecting components 70 can be one, two, or more. Some sub-isolation cavities 2121 do not contain the second connecting component 70, while others can contain it. In each sub-isolation cavity 2121 containing the second connecting component 70, one or more second connecting components 70 can be accommodated. This can further improve the connection stability between the base plate 60 and the side frame 21, and reduce the risk of the battery device 2 failing to seal due to connection failure between the base plate 60 and the side frame 21.

[0071] In some embodiments, the housing body 20 further includes a protective plate 22, which is disposed on the side of the bottom plate 60 opposite to the receiving cavity 40, and is fixedly connected to the side frame 21. It is understood that the protective plate 22 is disposed on the side of the bottom plate 60 opposite to the receiving cavity 40 to facilitate the cooperation between the protective plate 22 and the bottom plate 60 in supporting and protecting the battery cells 10 within the receiving cavity 40, further improving the structural strength and reliability of the battery device 2. Simultaneously, the protective plate 22 can further seal the bottom plate 60 and the second connecting assembly 70, reducing the risk of seal failure at the junction of the bottom plate 60 and the second connecting assembly 70. Therefore, by disposing of the protective plate 22 on the side of the bottom plate 60 opposite to the receiving cavity 40, the cooperation between the protective plate 22 and the bottom plate 60 improves the structural strength of the battery device 2, while also enhancing the sealing performance of the battery device 2.

[0072] Combination Figures 5-7 , Figure 6 It is based on Figure 5 A partially enlarged schematic diagram of area B of the battery device shown; Figure 7 This is a schematic diagram of the structure of the first connection component of a battery device according to one or more embodiments of this application.

[0073] In some embodiments, the first connecting component 50 includes an outer fastening part 51, a middle transition part 52, and an inner fastening part 53. The middle transition part 52 is connected between the outer fastening part 51 and the inner fastening part 53. The outer fastening part 51 abuts against the side of the housing cover 30 away from the side frame 21. The inner fastening part 53 is located in the cavity 2111 and abuts against the inner side wall of the cavity 2111. The middle transition part 52 is connected to the connecting part 211 and the housing cover 30. Understandably, by having the outer fastening part 51 abut against the side of the box cover 30 away from the frame, the connection stability between the first connecting component 50 and the box cover 30 is improved. The inner fastening part 53 is located in the cavity 2111 and abuts against the inner wall of the cavity 2111, which improves the connection stability between the first connecting component 50 and the connecting part 211. The middle transition part 52 can connect the outer fastening part 51 and the inner fastening part 53, so that the outer fastening part 51, the inner fastening part 53 and the middle transition part 52 cooperate to connect the box cover 30 and the connecting part 211, improve the connection stability between the box cover 30 and the connecting part 211, and reduce the risk of separation between the box cover 30 and the connecting part 211. Thus, by having the outer fastening part 51 abut against the side of the box cover 30 away from the side frame 21, the inner fastening part 53 located in the cavity 2111 and abutting against the inner wall of the cavity 2111, and the middle transition part 52 connected to the connecting part 211 and the box cover 30, the connection stability and sealing of the first connecting assembly 50 and the connecting part 211 can be improved.

[0074] Combination Figure 8 , Figure 8 This is a second structural schematic diagram of a battery device according to one or more embodiments of this application.

[0075] In some embodiments, the battery device 2 includes a central crossbeam 90 located within the receiving cavity 40. The central crossbeam 90 spans across opposite sides of the side frame 21 to divide the receiving cavity 40 into at least two sub-receiving cavities 41, in which the battery cell 10 is disposed. The central crossbeam 90 provides support and protection for the side frame 21, improving its structural strength. For example, when the side frame 21 is subjected to a lateral impact, the central crossbeam 90 can effectively absorb kinetic energy, thereby reducing the risk of deformation and damage to the side frame 21. The number of central crossbeams 90 can be one, two, or more, depending on the actual size requirements of the battery device 2. For example, there can be one central crossbeam 90, dividing the receiving cavity 40 into two sub-receiving cavities 41; or there can be two central crossbeams 90 spaced apart, dividing the receiving cavity 40 into three sub-receiving cavities 41, in which the battery cell 10 is disposed. Therefore, by having the central crossbeam 90 located within the receiving cavity 40 and dividing the receiving cavity 40 into at least two sub-receiving cavities 41, the structural strength of the main body 20 of the housing can be improved, thereby increasing the reliability of the battery device 2.

[0076] In summary, the battery device 2 provided in this application includes a battery cell 10, a housing body 20, and a housing cover 30; the housing body 20 includes a side frame 21; the housing cover 30 is connected to the side frame 21, and the housing cover 30 and the housing body 20 cooperate to form a receiving cavity 40, in which the battery cell 10 is disposed; wherein, the battery device 2 also includes a first connecting component 50 and a sealing gasket 80, the side frame 21 is provided with a connecting part 211 and an isolation cavity 212, at least a portion of the isolation cavity 212 is located between the receiving cavity 40 and the connecting part 211, the housing cover 30 covers the connecting part 211, the first connecting component 50 is connected to the connecting part 211 and the housing cover 30, and the sealing gasket 80 is sandwiched between the housing cover 30 and the side frame 21. Thus, the main body 20 and the cover 30 cooperate to form a receiving cavity 40 to accommodate the battery cell 10. The side frame 21 of the main body 20 is connected to the cover 30 via a connecting part 211 and a first connecting assembly 50. Since at least a portion of the isolation cavity 212 is located between the receiving cavity 40 and the connecting part 211, the distance between the first connecting assembly 50 and the receiving cavity 40 is greater. The isolation cavity 212 reduces the risk of airflow directly entering the receiving cavity 40 from the side, causing the receiving cavity 40 to fail to seal. At the same time, the sealing gasket 80 is sandwiched between the cover 30 and the side frame 21, improving the sealing effect of the side of the receiving cavity 40, thereby improving the sealing performance and reliability of the battery device 2. Compared with other battery devices, the battery device 2 provided in this application has better sealing performance and reliability.

[0077] 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, The battery device includes: Battery cell; The main body of the enclosure, including the side frames; The box cover is connected to the side frame, and the box cover and the box body cooperate to form a receiving cavity, in which the battery cell is disposed; The battery device further includes a first connecting component and a sealing gasket. The side frame is provided with a connecting portion and an isolation cavity. At least a portion of the isolation cavity is located between the receiving cavity and the connecting portion. The housing cover covers the connecting portion. The first connecting component is connected to the connecting portion and the housing cover. The sealing gasket is sandwiched between the housing cover and the side frame.

2. The battery device according to claim 1, characterized in that, The side frame also includes reinforcing ribs located within the isolation cavity, which divide the isolation cavity into multiple sub-isolation cavities.

3. The battery device according to claim 2, characterized in that, In a first direction from inside the receiving cavity to outside the receiving cavity, the plurality of sub-isolation cavities are divided into at least two columns.

4. The battery device according to claim 3, characterized in that, The at least two columns of the sub-isolation cavities include a first cavity column and a second cavity column. The first cavity column is closer to the receiving cavity in the first direction relative to the second cavity column. In the second direction intersecting the first direction, the first cavity column is closer to the housing cover relative to the second cavity column, so that a gap is formed between the second cavity column and the housing cover. The connecting portion is connected to the gap between the second cavity column and the housing cover.

5. The battery device according to claim 1, characterized in that, The connecting part is provided with a cavity, and the first connecting component is connected to the connecting part and the box cover and extends into the cavity.

6. The battery device according to claim 5, characterized in that, The connecting portion is provided with a plurality of cavities, which are spaced apart along the direction of extension of the connecting portion. The battery device includes a plurality of first connecting components, and each cavity corresponds to at least one first connecting component.

7. The battery device according to claim 5, characterized in that, The cavity extends along the direction of the connecting portion, and the battery device includes a plurality of first connecting components. The plurality of first connecting components are spaced apart along the direction of the connecting portion, and each of the plurality of first connecting components is connected to the connecting portion and the housing cover and extends into the cavity.

8. The battery device according to claim 1, characterized in that, The sealing gasket is at least partially sandwiched between the side frame corresponding to the connection portion and the box cover, and / or the sealing gasket is at least partially sandwiched between the side frame corresponding to the isolation cavity and the box cover.

9. The battery device according to any one of claims 1 to 8, characterized in that, The battery device includes a base plate and a second connecting assembly. The base plate is connected to the side frame on the side away from the housing cover, and the second connecting assembly is connected to the base plate and the side frame.

10. The battery device according to claim 9, characterized in that, The second connecting component is connected to the base plate and the side frame and extends into the isolation cavity.

11. The battery device according to claim 9, characterized in that, The main body of the box also includes a protective plate, which is disposed on the side of the bottom plate away from the receiving cavity, and the protective plate is fixedly connected to the side frame.

12. An electrical appliance, characterized in that, The electrical device includes the battery device as described in any one of claims 1 to 11.

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