Dust removal assembly, dust removal device and battery production line

Abstract

The utility model discloses a dust removal assembly, dust removal device and battery production line relates to battery technical field, dust removal assembly is used for the dust removal of to-be-cleaned surface of to-be-cleaned article, dust removal assembly includes: dust removal cover and blowing structure, the dust removal cover is equipped with the dust removal chamber, the dust removal chamber has the first end and the second end that are arranged oppositely along the axial direction, the first end of the dust removal cavity is open, the first end of the dust removal cavity and a to-be-cleaned face are sequentially arranged in the axial direction, the air blowing structure is arranged in the dust removal cavity and provided with an air blowing opening, the air blowing opening is suitable for blowing air towards the side where the first end is located, and an acute included angle is formed between the central axis of the air blowing opening and the central axis of the dust removal cavity. Therefore, the cleanliness of the to-be-cleaned object is improved conveniently, and the dust removal cover can shield flying dust and particles in the cleaning process.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a dust removal component, a dust removal device, and a battery production line. Background Technology

[0002] With the development of society and the advancement of technology, batteries are widely used as power sources for portable electronic products such as mobile communications, laptops, and digital cameras, as well as energy storage systems for electric vehicles.

[0003] In the battery manufacturing process, cells need to be formed first. During the cell formation process, a lot of foreign matter is generated. These foreign matter adhere to the cell tabs and affect the quality of the battery. Utility Model Content

[0004] This application proposes a dust removal component, a dust removal device, and a battery production line. By setting the angle between the central axis of the air blower and the central axis of the dust removal chamber to an acute angle, the air blown out of the air blower can more effectively strip away and carry away the particles and dust attached to the surface to be cleaned, thereby improving the cleanliness of the items to be cleaned. Moreover, the dust cover can block the dust and particles flying during the cleaning process, making the external environment of the items to be cleaned cleaner.

[0005] In a first aspect, embodiments of this application provide a dust removal assembly for removing dust from the surface of an item to be cleaned. The dust removal assembly includes a dust removal hood and a blowing structure. The dust removal hood has a dust removal chamber, which has a first end and a second end arranged opposite to each other along the axial direction. The first end of the dust removal chamber is open and is adapted to be arranged sequentially with the surface to be cleaned along the axial direction. The blowing structure is disposed in the dust removal chamber and has a blowing port. The blowing port is adapted to blow air toward the side where the first end is located, and the central axis of the blowing port forms an acute angle with the central axis of the dust removal chamber.

[0006] In the above technical solution, the blowing structure is arranged sequentially along the axial direction inside the dust removal chamber and the surface to be cleaned. The angle between the central axis of the blowing nozzle and the central axis of the dust removal chamber is an acute angle. Therefore, the angle between the airflow path of the blowing nozzle and the central axis of the surface to be cleaned is also an acute angle. The inclined airflow path provides a tangential force for the particles and dust attached to the surface to be cleaned, which facilitates the separation of particles and dust from the surface to be cleaned, thereby improving the cleanliness of the surface to be cleaned. At the same time, the dust cover can block flying dust and particles, reducing the risk of the surrounding environment of the items to be cleaned being contaminated.

[0007] In some embodiments, the acute angle α between the central axis of the air outlet and the central axis of the dust removal chamber satisfies 30°≤α≤60°.

[0008] In the above technical solution, by setting the acute angle between the central axis of the air outlet and the central axis of the dust removal chamber within the range of 30° to 60°, the airflow can provide a more suitable tangential force for the particles attached to the surface to be cleaned, thereby improving the cleaning efficiency of the surface to be cleaned.

[0009] In some embodiments, the blowing structure is an air knife.

[0010] In the above technical solution, the air knife is used as a blowing structure. The air knife can generate a narrow and high-speed airflow with good directionality, which makes it easier to improve the cleanliness of the surface to be cleaned.

[0011] In some embodiments, the blowing structure includes a first part, a second part, and a third part arranged sequentially along the axial direction. The first part extends linearly along the axial direction, the second part extends obliquely relative to the axial direction and is bent and connected between the first part and the third part, and an air outlet is formed at the free end of the third part. The flow area of ​​the third part decreases in the direction toward the air outlet.

[0012] In the above technical solution, the first part extends straight along the axial direction, which facilitates subsequent installation and connection of the drive structure; the second part extends obliquely relative to the axial direction and bends to connect between the first part and the third part, so that the first part and the third part have a certain interval in the radial direction, which facilitates increasing the cleaning area of ​​the air outlet; the flow area of ​​the third part decreases in the direction towards the air outlet, which facilitates increasing the tangential force of the airflow and improving the cleaning efficiency.

[0013] In some embodiments, the inner wall surface of the dust removal chamber is a conical surface, and the blowing structure can rotate relative to the dust removal hood around the central axis of the dust removal chamber, with the larger end of the conical surface corresponding to the first end.

[0014] In the above technical solution, the inner wall surface of the dust removal chamber is conical, which facilitates the collection of dust and particles; by setting the blowing structure to be able to rotate around the axial axis of the dust removal chamber, the cleaning area of ​​the blowing structure can be increased, thereby improving the cleaning efficiency.

[0015] In some embodiments, the air outlet and the central axis of the dust removal chamber are radially spaced apart, and the air outlet extends radially at an angle toward the central axis of the dust removal chamber.

[0016] In the above technical solution, the air outlet and the central axis of the dust removal chamber are spaced apart, and the air outlet extends radially towards the central axis of the dust removal chamber. When the air blowing structure rotates relative to the central axis of the dust removal chamber, the air outlet can cover all corners of the surface to be cleaned, reducing blind spots in cleaning.

[0017] In some embodiments, the radial distance x between the air outlet and the central axis of the dust removal chamber satisfies 0.1*D≤x≤0.3*D, where D is the diameter of the surface to be cleaned.

[0018] In the above technical solution, by setting the radial distance between the air outlet and the central axis of the dust removal chamber to be within the range of 0.1*D to 0.3*D, the air outlet is appropriately positioned relative to the central area of ​​the surface to be cleaned. This reduces blind spots in cleaning. Furthermore, the tilting of the air outlet's central axis relative to the dust removal chamber's central axis allows the airflow at the air outlet to be directed towards the central area, achieving focused airflow to the central area. It also helps to appropriately reduce the rotation space required for the air blowing structure, thereby reducing the volume of the dust removal hood and saving space.

[0019] In some embodiments, the second end of the dust collector is open and has a first driving structure. The first driving structure has a driving shaft connected to the blowing structure. A flow channel communicating with the blowing structure is formed in the driving shaft. The driving shaft is at least used to drive the blowing structure to rotate. The housing of the first driving structure is fixed to the dust collector and closes the second end of the dust collector.

[0020] In the above technical solution, the second end of the dust collector is open and equipped with a first drive structure, which facilitates the installation of the first drive structure and reduces interference between the first drive structure and the items to be cleaned; a flow channel connecting the air blowing structure is formed inside the drive shaft, which reduces the obstruction and energy loss of airflow during transmission; the housing of the first drive structure seals the second end of the dust collector, effectively preventing the possibility of dust and particles leaking out from the second end of the dust collector.

[0021] In some embodiments, the second end of the dust collector hood is provided with a first driving structure, which is used to drive the blowing structure to rotate and also to drive the blowing structure to move axially to change the axial distance between the blowing structure and the second end.

[0022] In the above technical solution, the first driving structure can also drive the blowing structure to move axially to change the axial distance between the blowing structure and the second end. Thus, the axial distance between the blowing structure and the first end can be changed through the first driving structure, which is convenient to adapt to items of different sizes to be cleaned, making the use environment of the dust removal component more flexible.

[0023] In some embodiments, the dust collector hood further includes a negative pressure chamber separated from the dust collector chamber. The negative pressure chamber has an annular exhaust port, which is located on the end face of the dust collector hood corresponding to the first end, or the exhaust port is located on the cavity wall of the dust collector chamber to connect the negative pressure chamber and the dust collector chamber.

[0024] In the above technical solution, the dust removal chamber also has a negative pressure chamber separated from the dust removal chamber, so that the dust and particles cleaned by the blowing structure can be collected by the negative pressure chamber, improving the cleaning efficiency of the dust removal component; the exhaust port is located on the end face of the first end of the dust removal hood, making the structure of the dust removal hood simpler and easier to process and manufacture; or the exhaust port is located on the cavity wall of the dust removal chamber, and the inner wall surface of the dust removal chamber is a conical surface, so that the particles and dust accumulated in the dust removal chamber can be guided by the conical surface to flow more smoothly to the exhaust port, further improving the cleaning efficiency of the dust removal component.

[0025] In some embodiments, the dust collector hood is axially expandable and contractible, and the second end of the dust collector hood is provided with a first driving structure. The first driving structure is used to drive the blowing structure to rotate, and to drive the blowing structure to move axially, and also to drive the dust collector hood to expand and contract axially to change the axial distance between the exhaust port and the second end.

[0026] In the above technical solution, the first driving structure can also drive the dust cover to extend and retract axially to change the axial distance between the exhaust port and the second end, so as to adapt to items of different sizes and shapes to be cleaned and improve the practicality of the dust removal component.

[0027] In some embodiments, on the longitudinal section of the dust collector hood, the orthographic projection of the edge of the air blower is located within the orthographic projection range of the edge of the exhaust vent.

[0028] In the above technical solution, the orthographic projection of the edge of the air blower is located within the orthographic projection range of the edge of the air exhaust port. Thus, the air blower and the air exhaust port are arranged radially opposite each other, and the air blower and the air exhaust port form an airflow circulation, which facilitates the improvement of the cleaning efficiency of the dust removal component.

[0029] Secondly, embodiments of this application provide a dust removal device, including: a conveying component, a plurality of limiting components, and a dust removal component in the first aspect. The conveying component is used for intermittent conveying along a first direction. The plurality of limiting components are spaced apart on the conveying component along the first direction. Each limiting component is used to install an item to be cleaned and is adapted to drive the item to be cleaned to move intermittently along the first direction following the conveying component. The dust removal component is spaced apart on one side of the limiting component in a second direction and is adapted to be sequentially opposite to the surfaces to be cleaned of the plurality of items to be cleaned. The second direction intersects the first direction and is parallel to the extension direction of the central axis of the dust removal chamber.

[0030] In the above technical solution, by setting up a conveying component, the items to be cleaned can automatically and continuously enter and leave the dust removal area, improving the cleaning efficiency of the dust removal device; the setting of the limiting component makes the items to be cleaned more stable when moving on the conveying component, improving the reliability of the dust removal device; the dust removal component is suitable for being set opposite to the surface of the items to be cleaned, which facilitates improving the cleanliness of the surface. Therefore, through the coordinated work of the conveying component, multiple limiting components, and the dust removal component, the working efficiency of the dust removal device is easily improved.

[0031] In some embodiments, the dust removal device is used to remove dust from the flat surface of the cylindrical battery cell. The limiting component defines a limiting groove, the groove wall of which is an arc surface, and the axial direction of the arc surface is parallel to the axial direction of the dust removal chamber. The blowing structure can rotate relative to the dust removal hood around the central axis of the dust removal chamber. And / or, the limiting component is provided with a second driving structure, which is used to drive the battery cell to rotate relative to the dust removal hood around the central axis of the dust removal chamber.

[0032] In the above technical solution, the dust removal device is used to remove dust from the flat surface of the battery cell, which facilitates the improvement of the cleanliness of the surface to be cleaned after the flattening process. The groove wall of the limiting groove is an arc surface that matches the outer surface of the cylindrical battery cell, which improves the stability of the battery cell during the dust removal process. The blowing structure can rotate relative to the central axis of the dust removal chamber, which increases the cleaning area of ​​the blowing structure. And / or, the battery cell is driven to rotate around the central axis of the dust removal chamber by the second driving structure, which also increases the cleaning area of ​​the blowing structure.

[0033] Thirdly, embodiments of this application provide a battery production line, including a flattening device and a dust removal device. The flattening device is used to flatten the tabs of cylindrical battery cells to form a flattened surface, and the dust removal device is used to remove dust from the flattened surface.

[0034] In the above technical solution, the tabs of the battery cell are first flattened using a flattening device to form a flat surface, and then a dust removal device is used to remove dust from the flat surface. This effectively removes particles and dust adhering to the flat surface, facilitating subsequent processing of the battery cell and thus improving the product quality of the battery. Therefore, by employing the aforementioned dust removal device, the product quality of the battery can be improved. Attached Figure Description

[0035] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0036] Figure 1 This is a schematic diagram of the electrical device proposed in an embodiment of the present utility model;

[0037] Figure 2 for Figure 1 A schematic diagram of the battery device shown;

[0038] Figure 3 This is a schematic diagram of the dust removal component and the item to be cleaned according to an embodiment of the present utility model;

[0039] Figure 4 for Figure 3 A cross-sectional view of the dust removal assembly and the item to be cleaned shown;

[0040] Figure 5 for Figure 4 A magnified view of point A, indicated by the center circle;

[0041] Figure 6 This is a schematic diagram of the dust removal device proposed in an embodiment of the present utility model;

[0042] Figure 7 for Figure 6 The diagram shows the limiting structure.

[0043] Figure label:

[0044] Electrical device 4, battery device 3, dust removal device 2, dust removal assembly 1, dust removal hood 10, dust removal chamber 12, first end 120, second end 122, conical surface 124, negative pressure chamber 14, exhaust port 140, fixing ring block 16, exhaust channel 18, blowing structure 20, blowing port 22, first part 24, second part 25, third part 26, free end 260, item to be cleaned 30, surface to be cleaned 32, first drive structure 40, drive shaft 42, flow channel 420, housing 44, conveying assembly 50, limiting assembly 60, limiting groove 62, arc surface 620, controller 70, motor 72, battery cell 80, box 90, first box 92, second box 94. Detailed Implementation

[0045] 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 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.

[0046] 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 description 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0047] 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.

[0048] 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 direct connection or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] 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.

[0050] 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).

[0051] 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.

[0052] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in portable electronic products such as mobile communications, laptops, and digital cameras, as well as in military equipment and aerospace. With the continuous expansion of battery application areas, the market demand is also constantly increasing.

[0053] In the battery manufacturing process, positive and negative electrode sheets need to be cut to prepare tabs, and then the positive and negative electrode sheets and separator are wound into a battery cell. After the battery cell is formed, it needs to undergo hot pressing, shaping, and welding processes to weld the tabs to the current collector. During the tab flattening process, some particles and dust may remain on the flattened surface of the battery cell. These particles and dust can reduce battery quality. For example, they may reduce the yield of subsequent processes (tab-current collector welding), leading to cell scrapping and increased production costs. Alternatively, particles from the current collector surface may fall between the battery cell and the casing, potentially causing a short circuit and resulting in self-discharge and fire. To reduce the possibility of particles and dust affecting battery quality, dust removal components can be used to remove dust from the battery cells.

[0054] In some technologies, the following methods are used to remove particles and dust adhering to the surface of the battery cell: First, a brush is used to clean the surface. Depending on the brush's cleaning method, there are oscillating brush dust removal, rotary brush dust removal, and rolling brush dust removal. However, when using a brush to clean the surface of the battery cell, the surface may be uneven. The brush bristles, under friction on this uneven surface, may produce debris that remains on the surface, leading to secondary contamination of the battery cell. Second, a blowing structure is used to clean the surface to remove particles and dust adhering to the surface. However, the blown-off particles and dust can affect the surrounding environment. Furthermore, the aforementioned blowing structure is usually located on the flattening structure of the tabs, meaning that a blowing dust removal device is installed simultaneously with the tab flattening. However, due to limitations of the flattening equipment, the dust removal effect is often poor.

[0055] Based on the above considerations, in order to better clean the surface of the item to be cleaned, this application proposes a dust removal assembly, which includes a dust removal hood and a blowing structure. The dust removal hood has a dust removal chamber, which has a first end and a second end arranged opposite to each other along the axial direction. The first end of the dust removal chamber is open and is adapted to be arranged sequentially with the surface to be cleaned along the axial direction. The blowing structure is located in the dust removal chamber and has a blowing port. The blowing port is adapted to blow air toward the side where the first end is located, and the central axis of the blowing port forms an acute angle with the central axis of the dust removal chamber.

[0056] In the above technical solution, the blowing structure is arranged sequentially along the axial direction inside the dust removal chamber and the surface to be cleaned. The angle between the central axis of the blowing port and the central axis of the dust removal chamber is an acute angle. Therefore, the angle between the airflow path of the blowing port and the central axis of the surface to be cleaned is also an acute angle. The inclined airflow path provides a tangential force for the particles and dust attached to the surface to be cleaned, which facilitates the separation of the attached particles and dust from the surface to be cleaned, thereby improving the cleanliness of the surface to be cleaned. At the same time, the dust cover can block flying dust and particles, reducing the risk of pollution to the surrounding environment.

[0057] The dust removal components disclosed in this application can be used, but are not limited to, in the production of battery cells. The produced battery cells can be used in electrical devices such as vehicles, ships, or aircraft. These electrical devices can be composed of battery cells produced after being treated by the dust removal components disclosed in this application, which helps improve the quality, stability, and lifespan of the battery cells.

[0058] Electrical devices can include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0059] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. Multiple battery cells in the battery device can be connected in series, parallel, or mixed via a busbar. For example, the battery device mentioned in this application can be a battery module or a battery pack. A battery module is formed by arranging and fixing multiple battery cells to form an independent module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties. A battery pack generally includes a housing for encapsulating one or more battery cells or one or more battery modules. The housing can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells. Of course, the battery device may also not include a housing.

[0060] As an example, the battery device is housed in the housing by fixing battery modules within the housing. Alternatively, the battery device can be housed in the housing by directly fixing multiple individual battery cells to the housing.

[0061] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells; here, "closed" refers to covering or shutting down, and can be sealed or unsealed; the first enclosure may be a top cover or a bottom plate. As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame to form a closed space inside the enclosure to house the individual battery cells.

[0062] In the embodiments of this application, the battery cell may include a secondary battery, a primary battery, etc. A secondary battery refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell may be a lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a sodium lithium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, a sodium-ion battery, or a magnesium-ion battery, etc., and the embodiments of this application are not limited in this regard. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited in this regard either. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited in this regard either.

[0063] For example, a single battery cell typically includes a housing, a cell assembly, and an electrolyte. The housing is used to house the cell assembly and the electrolyte, and the housing has at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive electrode sheets, negative electrode sheets, and separators.

[0064] The positive electrode generally includes a positive current collector and a positive active material layer. The positive active material layer is directly or indirectly coated on the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer. The positive current collector without the positive active material layer serves as a positive electrode tab. Multiple positive electrode tabs are stacked together and form an electrical connection with the positive electrode post. For example, the multiple stacked positive electrode tabs can be directly soldered to the positive electrode post to form an electrical connection; or, the battery cell assembly can also include a positive electrode adapter piece. The multiple stacked positive electrode tabs are soldered to one end of the positive electrode adapter piece, and the other end of the positive electrode adapter piece is soldered to the positive electrode post, so that the positive electrode tabs and the positive electrode post form an electrical connection.

[0065] The negative electrode generally includes a negative current collector and a negative active material layer. The negative active material layer is directly or indirectly coated on the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer. The negative current collector without the negative active material layer serves as a negative electrode tab. Multiple negative electrode tabs are stacked together and form an electrical connection with the negative electrode post. For example, the stacked negative electrode tabs can be directly welded to the negative electrode post to form an electrical connection; alternatively, the battery cell assembly may also include a negative electrode adapter piece. The stacked negative electrode tabs are welded to one end of the negative electrode adapter piece, and the other end of the negative electrode adapter piece is welded to the negative electrode post, so that the negative electrode tabs and the negative electrode post form an electrical connection. The material of the separator is not limited; for example, it can be polypropylene or polyethylene.

[0066] For ease of explanation, the following embodiments use a vehicle as an example to describe in detail the structure of the electrical device 4, battery device 3, and battery cell 80 of this application.

[0067] Please refer to Figure 1 , Figure 1 The electrical device 4 provided in some embodiments of this application is a structural schematic diagram of a vehicle. The vehicle 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. The vehicle is equipped with a battery device 3, which can be located at the bottom, front, or rear of the vehicle. The battery device 3 can be used to power the vehicle; for example, the battery device 3 can serve as the vehicle's operating power source. The vehicle may also include a controller 70 and a motor 72. The controller 70 is used to control the battery device 3 to supply power to the motor 72, for example, to meet the power needs of starting, navigation, and driving the vehicle. In some embodiments of this application, the battery device 3 can not only serve as the vehicle's operating power source but also as the vehicle's driving power source, replacing or partially replacing gasoline or natural gas to provide driving power for the vehicle.

[0068] Please refer to Figure 2 , Figure 2This is an exploded view of the structure of a battery cell 80 used in a battery device 3 according to some embodiments of this application. The battery device 3 includes a housing 90 and a plurality of battery cells 80, which are housed within the housing 90. The housing 90 provides assembly space for the battery cells 80, and can have various structures. In some embodiments, the housing 90 may include a first housing 92 and a second housing 94, which overlap each other, defining a cavity for accommodating the battery cells 80. The second housing 94 may be a hollow structure open at one end, and the first housing 92 may be a plate-like structure, covering the open side of the second housing 94 so that the first housing 92 and the second housing 94 together define the cavity; alternatively, the first housing 92 and the second housing 94 may both be hollow structures open on one side (e.g., Figure 2 As shown, the open side of the first box 92 fits onto the open side of the second box 94. Of course, the box 90 formed by the first box 92 and the second box 94 can be of various shapes, such as a cylinder or a cuboid.

[0069] In the battery device 3, multiple battery cells 80 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 80 are connected in both series and parallel configurations. Multiple battery cells 80 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 80 is housed within the housing 90. Alternatively, the battery device 3 can also consist of multiple battery cells 80 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 90. The battery device 3 may also include other structures; for example, the battery device 3 may also include a busbar for realizing the electrical connection between the multiple battery cells 80.

[0070] Please refer to Figures 3-5 In the embodiments of this application, the dust removal assembly 1 is used to remove dust from the surface 32 of the item 30 to be cleaned. The dust removal assembly 1 includes a dust removal hood 10 and a blowing structure 20. The dust removal hood 10 has a dust removal chamber 12. The dust removal chamber 12 has a first end 120 and a second end 122 arranged opposite each other along the axial direction. The first end 120 of the dust removal chamber 12 is open and is adapted to be arranged sequentially with the surface 32 to be cleaned along the axial direction. The blowing structure 20 is disposed in the dust removal chamber 12 and has a blowing port 22. The blowing port 22 is adapted to blow air toward the side where the first end 120 is located, and the central axis of the blowing port 22 (e.g., Figure 5 L2 in the middle) and the central axis of the dust removal chamber 12 (e.g. Figure 5L1 in the diagram forms an acute angle. It can be understood that the dust removal chamber 12 has a central axis L1, the extension direction of the central axis L1 is the axial direction of the dust removal chamber 12 and the axial direction of the dust removal hood 10, the direction around the central axis L1 is the circumferential direction of the dust removal chamber 12 and the circumferential direction of the dust removal hood 10, and in the radial plane, the direction passing through the central axis L1 is the radial direction of the dust removal chamber 12 and the radial direction of the dust removal hood 10, and the radial plane is perpendicular to the central axis L1.

[0071] As can be seen, the surface to be cleaned 32 is located at the first end 120 of the dust removal chamber 12. Since the blowing structure 20 is located inside the dust removal chamber 12 and blows air towards the side where the first end 120 is located, the blowing structure 20 can blow air towards the surface to be cleaned 32. The angle between the central axis of the air outlet 22 and the central axis of the dust removal chamber 12 is an acute angle, and the angle between the central axis of the air outlet 22 and the normal of the surface to be cleaned 32 is also an acute angle. That is, the airflow direction blown out through the air outlet 22 forms an acute angle with the surface to be cleaned 32. The inclined airflow direction provides a tangential force for the particles and dust attached to the surface to be cleaned 32. Compared with the central axis of the air outlet being parallel to the normal of the surface to be cleaned, in the above-mentioned scheme of this application, the surface to be cleaned... The particles and dust adhering to the cleaning surface can be more easily separated from the surface 32 to be cleaned under the action of airflow, thereby improving the cleaning effect and cleaning efficiency of the surface 32 to be cleaned; in other words, the airflow direction blown out from the air outlet 22 is set at an acute angle to the central axis of the dust removal chamber 12, so that the blown airflow not only flows along the axial direction of the dust removal chamber 12, but also has a component that flows radially along the dust removal chamber 12, so as to form a certain radial component on the surface 32 to be cleaned. This radial component can not only provide tangential cleaning force, but also help to expand the cleaning range of the airflow, so that the dust removal component 1 can more effectively deal with different areas on the surface 32 to be cleaned, which is conducive to further improving the cleaning efficiency of the entire surface 32 to be cleaned.

[0072] In addition, the dust removal chamber 12 has a first end 120 and a second end 122 arranged opposite to each other along the axial direction. The first end 120 is open and the blowing structure 20 is also located in the dust removal chamber 12. The dust removal hood 10 provides a semi-enclosed environment for the blowing structure 20. The surface to be cleaned 32 located at the first end 120 can block the opening of the first end 120 to a certain extent, so that the dust removal hood 10 can block and collect the particles and dust blown off by the blowing structure 20 to a certain extent, reducing the possibility of particles and dust falling into the external environment of the item to be cleaned 30 and reducing the amount of particles falling into the surrounding environment.

[0073] It is understandable that when the dust removal assembly 1 removes dust from the surface 32 of the item to be cleaned 30, the surface 32 can be approximately perpendicular to the central axis of the dust removal chamber 12, so that the angle between the central axis of the air outlet 22 and the normal of the surface 32 is also an acute angle; at this time, the surface 32 can be located outside the dust removal chamber 12, for example, the surface 32 and the dust removal hood 10 are spaced apart along the axial direction of the dust removal hood 10 (e.g.) Figure 4 and Figure 5 (as shown), or, the surface to be cleaned 32 may also be located inside the dust removal chamber 12, in which case at least a portion of the item to be cleaned 30 may extend into the dust removal hood 10 through the opening of the first end 120.

[0074] For example, the item 30 to be cleaned is a cylindrical battery cell. After the tabs of the cylindrical battery cell are flattened, a flat surface is formed. After the flattening process, some particles and dust remain on the flat surface. By using the dust removal component 1 described above, the inclined airflow path provides a tangential force to the particles and dust attached to the flat surface, which can effectively remove the particles and dust attached to the flat surface, facilitating the subsequent processing and production of the cylindrical battery cell. Of course, the dust removal component 1 can also be used to clean other structures, not limited to battery cells.

[0075] Please refer to Figure 4 and Figure 5 In some embodiments, the acute angle α between the central axis of the air outlet 22 and the central axis of the dust removal chamber 12 satisfies 30°≤α≤60°, for example, α is 30°, 34°, 38°, 45°, 49°, 52°, 56°, 60°, etc. By setting the angle between the central axis of the air outlet 22 and the central axis of the dust removal chamber 12 in the range of 30° to 60°, the blown airflow can cover the surface 32 to be cleaned in a more uniform manner. It will not cause the airflow to be too dispersed due to the angle being too large, nor will it cause the airflow to be too concentrated due to the angle being too small, thereby improving the working efficiency of the dust removal component 1. Moreover, by setting the angle in the range of 30° to 60°, it is easier for the airflow to provide a more suitable tangential force for the particles attached to the surface 32 to be cleaned. The appropriate angle helps the airflow to better penetrate into the tiny gaps and uneven areas of the surface 32 to be cleaned, thereby enhancing the cleaning effect.

[0076] In some embodiments, the blowing structure 20 is an air knife. By using the air knife as the blowing structure 20, the air knife can generate a narrow and high-speed airflow with good directionality, which can more accurately act on the surface 32 to be cleaned. This allows the airflow to penetrate into the tiny gaps of the surface 32 to be cleaned, thereby improving the cleanliness of the surface 32. Moreover, because the airflow of the air knife has good directionality and strong concentration, the dust removal component 1 can operate with lower power to achieve the same dust removal efficiency, thereby saving energy costs. At the same time, the design of the air knife is flexible and the structure is relatively simple. It can be adjusted according to different dust removal needs and the shape and size of the item 30 to be cleaned, which is convenient for maintenance and replacement.

[0077] Please refer to Figure 4 In some embodiments, the blowing structure 20 includes a first portion 24, a second portion 25 and a third portion 26 arranged sequentially along the axial direction. The first portion 24 extends linearly along the axial direction, the second portion 25 extends obliquely relative to the axial direction and is bent and connected between the first portion 24 and the third portion 26, and the air outlet 22 is formed at the free end 260 of the third portion 26. The flow area of ​​the third portion 26 decreases in the direction toward the air outlet 22.

[0078] As can be seen, the first part 24 of the blowing structure 20 extends linearly along the axial direction. This design simplifies the overall shape of the blowing structure 20 and greatly facilitates the subsequent installation process. It makes it easier to align and connect the blowing structure 20 with the dust cover 10 or other drive structures, reducing the installation difficulty and interference problems caused by the complexity of the structure. The second part 25 extends obliquely relative to the axial direction and bends to connect between the first part 24 and the third part 26. This allows the first part 24 and the third part 26 to form a certain interval in the radial direction, thereby allowing the air outlet 22 to act on the surface to be cleaned 32 over a larger range, making the dust removal process more comprehensive and thorough. The flow area of ​​the third part 26 gradually decreases along the direction towards the air outlet 22. When the airflow passes through the gradually narrowing channel, its speed will increase accordingly, so that the airflow has a higher speed and stronger tangential force when it reaches the surface to be cleaned 32. It can more effectively sweep the surface to be cleaned 32 to blow away the dust and particles on the surface to be cleaned 32, thereby improving the cleaning efficiency and effect.

[0079] Please refer to Figure 4 and Figure 5 In some embodiments, the inner wall surface of the dust removal chamber 12 is a conical surface 124, and the blowing structure 20 can rotate relative to the dust removal hood 10 around the central axis of the dust removal chamber 12, with the large end of the conical surface 124 corresponding to the first end 120.

[0080] As can be seen, the inner wall of the dust removal chamber 12 is a conical surface 124. The shape of the conical surface 124 can guide dust and particles to flow downward along the inner wall, making it easier for dust and particles to gather at the bottom of the dust removal chamber 12 under the action of gravity, thereby effectively collecting dust and particles and facilitating subsequent cleaning (e.g., cleaning through the negative pressure chamber 14 set later). The blowing structure 20 can rotate around the central axis of the dust removal chamber 12, which can more flexibly adjust the blowing direction to ensure that the airflow can evenly cover the surface 32 to be cleaned, which helps to reduce cleaning blind spots and improve cleaning efficiency. When the dust removal assembly 1 is dealing with the surface 32 to be cleaned that has a complex shape or a large area, the rotating blowing structure 20 can increase the cleaning range, thereby more effectively blowing dust and particles away from all angles.

[0081] Since the large end of the cone 124 corresponds to the first end 120, and the large end of the cone 124 can be understood as the end with a larger diameter, the small end of the cone 124 can correspond to the second end 122. Therefore, the dust and particles collected in the dust removal chamber 12 tend to gather towards the large end of the cone 124. At the same time, the position of the cone 124 near the surface to be cleaned 32 can provide a large rotation space for the blowing structure 20, which is conducive to further increasing the cleaning range of the blowing structure 20.

[0082] In addition, the rotatable blowing structure 20 allows the dust removal assembly 1 to adapt to items 30 of different shapes and sizes to be cleaned. Whether the items are round, square or irregularly shaped, they can be effectively cleaned by adjusting the rotation angle and blowing direction of the blowing structure 20, thus improving the practicality of the dust removal assembly 1.

[0083] Please refer to Figure 4 and Figure 5 In some embodiments, the air outlet 22 and the central axis of the dust removal chamber 12 are radially spaced apart, and the air outlet 22 extends radially in an inclined direction toward the central axis of the dust removal chamber 12.

[0084] As can be seen, the air outlet 22 and the central axis of the dust removal chamber 12 are radially spaced apart, and the air outlet 22 extends radially towards the direction close to the central axis of the dust removal chamber 12. When the blowing structure 20 starts to work, the airflow is blown out from the air outlet 22 and flows along the inclined air outlet 22. Since the air outlet 22 is inclined towards the central axis of the dust removal chamber 12, the airflow will first converge towards the center of the surface to be cleaned 32, which helps to enhance the intensity of the airflow in the central area of ​​the surface to be cleaned 32 and increase the blowing time per unit area of ​​the airflow in the central area of ​​the surface to be cleaned 32, so that the central area can be cleaned more effectively. Subsequently, after the airflow reaches the center of the surface to be cleaned 32, it will begin to diffuse outwards along the surface to be cleaned 32. This diffusion effect can increase the cleaning range of the airflow.

[0085] For example, the item to be cleaned 30 is a cylindrical battery cell. After the tabs of the cylindrical battery cell are flattened, a flat surface is formed. After the flattening process, some particles and dust will remain on the flat surface, especially in the central area of ​​the flat surface where more dust and particles remain. The air outlet 22 extends radially towards the central axis of the dust removal chamber 12, so that the airflow intensity in the central area is higher, which can effectively flatten the dust and particles remaining in the center of the flat surface and improve the cleaning effect.

[0086] In addition, the blowing structure 20 rotates relative to the central axis of the dust removal chamber 12, so that the airflow blown out of the air outlet 22 can dynamically and comprehensively cover all corners of the surface 32 to be cleaned during the continuous rotation of the blowing structure 20, thereby increasing the cleaning area of ​​the dust removal component 1 and reducing blind spots.

[0087] In some embodiments, the radial distance x between the air outlet 22 and the central axis of the dust removal chamber 12 satisfies 0.1*D≤x≤0.3*D, where D is the diameter of the surface 32 to be cleaned.

[0088] In the above technical solution, by setting the radial distance between the air outlet 22 and the central axis of the dust removal chamber 12 to be within the range of 0.1*D to 0.3*D, the air outlet 22 is appropriately positioned relative to the central area of ​​the surface to be cleaned 32. This reduces the blind spot in cleaning. Furthermore, the inclined setting of the central axis of the air outlet 22 relative to the central axis of the dust removal chamber 12 facilitates the airflow at the air outlet 22 being directed towards the central area, achieving focused airflow to the central area. It also helps to appropriately reduce the rotation space required for the blowing structure 20, thereby reducing the volume of the dust removal hood 10 and saving space. For example, x can be 0.1*D, 0.12*D, 0.15*D, 0.18*D, 0.2*D, 0.23*D, 0.25*D, 0.27*D, or 0.3*D, etc.

[0089] Please refer to Figures 3-5 In some embodiments, the second end 122 of the dust hood 10 is open and the second end 122 of the dust hood 10 is provided with a first drive structure 40. The first drive structure 40 has a drive shaft 42 connected to the blowing structure 20. A flow channel 420 communicating with the blowing structure 20 is formed in the drive shaft 42. The drive shaft 42 is at least used to drive the blowing structure 20 to rotate. The housing 44 of the first drive structure 40 is fixed to the dust hood 10 and the housing 44 closes the second end 122 of the dust hood 10.

[0090] As can be seen, the drive shaft 42 of the first drive structure 40 is not only used to drive the blowing structure 20 to rotate, but also forms a flow channel 420 that connects to the blowing structure 20. This design integrates the driving and blowing functions, reduces additional connecting parts and pipelines, and makes the structure of the entire dust removal assembly 1 more compact. Moreover, the flow channel 420 formed in the drive shaft 42 reduces the obstruction and energy loss of airflow during transmission, allowing the airflow to be delivered to the blowing structure 20 more smoothly and efficiently, thereby improving cleaning efficiency. The second end 122 of the dust removal hood 10 is open and equipped with the first drive structure 40, which facilitates the first drive. With the installation of the moving structure 40, the first end 120 of the dust cover 10 and the surface to be cleaned 32 are arranged sequentially along the axial direction. By placing the item to be cleaned 30 and the first driving structure 40 on both sides of the dust cover 10 along the axial direction, the interference between the first driving structure 40 and the item to be cleaned 30 can be reduced. The housing 44 of the first driving structure 40 closes the second end 122 of the dust cover 10, so the structure of the dust cover 10 is relatively simple and helps to reduce the possibility of dust and particles in the dust cover 10 entering the first driving structure 40, extending the service life of the first driving structure 40 and reducing downtime caused by failure.

[0091] Please refer to Figure 4 and Figure 5 In some embodiments, the second end 122 of the dust cover 10 is provided with a first driving structure 40. The first driving structure 40 is used to drive the blowing structure 20 to rotate. The first driving structure 40 is also used to drive the blowing structure 20 to move axially to change the axial distance between the blowing structure 20 and the second end 122.

[0092] As can be seen, the first driving structure 40 can also drive the blowing structure 20 to move axially, thereby changing the axial distance between the blowing structure 20 and the second end 122. This allows for flexible adaptation to scenarios where the placement of the item 30 to be cleaned varies due to differences in size and shape. For example, when the outer contour of the item 30 to be cleaned is large, it is located outside the dust removal chamber 12. The blowing structure 20 can be positioned close to the second end 122, and the first driving structure 40 can drive the blowing structure 20 to move to a suitable axial distance from the surface 32 to be cleaned. This ensures that the two do not interfere with each other while achieving a more comprehensive cleaning. Alternatively, when the outer contour of the item 30 to be cleaned is small, a portion of the item 30 can extend into the dust removal chamber 12. In this case, the first driving structure 40 can drive the blowing structure 20 to move a certain distance toward the side where the first end 120 is located, so that the blowing structure 20 provides space for the item 30 to be cleaned. This also facilitates maintaining a certain axial distance between the blowing structure 20 and the surface 32 to be cleaned.

[0093] For example, the first drive structure 40 includes a drive shaft 42 connected to the blower structure 20. The drive shaft 42 is rotatably disposed in the housing 44. The first drive structure 40 may include a first driver that drives the drive shaft 42 to rotate so as to drive the blower structure 20 to rotate. The first drive structure 40 may also include a second driver that cooperates with the outer peripheral wall of the drive shaft 42. For example, the second driver meshes with the gear teeth on the outer peripheral wall of the drive shaft 42 through a gear. A part of the drive shaft 42 is configured as a rack so that the second driver can drive the drive shaft 42 to move axially through the gear.

[0094] Please refer to Figure 4 and Figure 5 In some embodiments, the axial distance between the air outlet 22 of the blowing structure 20 and the surface 32 of the item to be cleaned 30 is L4, where 5mm≤L4≤10mm. When the axial distance between the air outlet 22 and the surface 32 is too small (e.g., L4<5mm), the airflow blown out by the air outlet 22 covers a small area on the surface 32, which may result in poor cleaning effect in some areas of the surface 32. When the axial distance between the air outlet 22 and the surface 32 is too large (e.g., L4>10mm), the airflow will suffer energy loss during propagation, causing the airflow to weaken when it reaches the surface 32, resulting in poor cleaning effect on the surface 32. By setting the axial distance between the air outlet 22 and the surface 32 to be cleaned within the range of 5mm to 10mm, the airflow will not be limited by the distance and thus have insufficient coverage, nor will it suffer serious energy loss due to the distance, thereby improving the cleaning efficiency of the dust removal component 1. For example, L4 can be 5mm, 6mm, 7mm, 9mm or 10mm, etc.

[0095] Please refer to Figure 4 In some embodiments, the dust removal hood 10 also has a negative pressure chamber 14 that is separated from the dust removal chamber 12. The negative pressure chamber 14 forms an annular exhaust port 140. The exhaust port 140 is located on the end face of the dust removal hood 10 corresponding to the first end 120, or the exhaust port 140 is located on the cavity wall of the dust removal chamber 12 to connect the negative pressure chamber 14 and the dust removal chamber 12.

[0096] As can be seen, the dust removal chamber 12 also has a negative pressure chamber 14 separated from it, so that the dust and particles cleaned by the blowing structure 20 can be collected by the negative pressure chamber 14. Thus, the negative pressure chamber 14 and the dust removal chamber 12 together form a relatively closed dust removal space, which can effectively reduce the leakage of dust and particles into the external environment during the cleaning process, thereby maintaining the cleanliness and tidiness of the working area and improving the working efficiency of the dust removal component 1. The exhaust port 140 is set so that the airflow can be drawn into the exhaust port 140 after flowing from the middle area of ​​the surface to be cleaned 32 to the edge. Thus, the dust stripped off from the surface to be cleaned by the airflow can be drawn into the exhaust port. The 140 intake forms a cleaning and collection dust removal cycle, which facilitates the improvement of the working efficiency of the dust removal component 1. At the same time, if the exhaust port 140 is located on the end face of the dust removal hood 10, it is convenient for processing and manufacturing. If the exhaust port 140 is located on the cavity wall of the dust removal chamber 12, it is convenient for the dust removal hood 10 and the item to be cleaned 30 to form a relatively closed dust removal space during use. The airflow will peel off the dust and particles on the surface to be cleaned 32 and carry them into the dust removal chamber 12. Due to the negative pressure at the exhaust port 140, dust and particles can be cleaned and collected at the same time, which is conducive to further reducing the particles flying out of the dust removal chamber 12 and improving the surrounding environment.

[0097] In addition, since the exhaust port 140 is annular, it is easy for the exhaust port 140 to have a large suction range, so that the dust, particles and other particles that have been detached can be drawn into the negative pressure chamber 14 in a timely manner with the airflow.

[0098] In some examples, the inner wall surface of the dust removal chamber 12 is a conical surface 124, with the large end of the conical surface 124 corresponding to the first end 120. When the exhaust port 140 is located on the wall of the dust removal chamber 12, the exhaust port 140 penetrates the conical surface 124. The particles and dust accumulated in the dust removal chamber 12 can flow more smoothly to the exhaust port 140 through the guidance of the conical surface 124, further improving the cleaning efficiency of the dust removal assembly 1.

[0099] In some examples, the dust hood 10 also has a negative pressure chamber 14 separated from the dust removal chamber 12. The negative pressure chamber 14 forms an annular exhaust port 140. The inner wall surface of the dust removal chamber 12 is a conical surface 124. The blowing structure 20 can rotate relative to the dust hood 10 about the central axis of the dust removal chamber 12.

[0100] As can be seen, the blowing structure 20 can rotate around the central axis of the dust removal chamber 12, allowing for more flexible adjustment of the blowing direction to ensure that the airflow can evenly cover the surface 32 to be cleaned. The negative pressure chamber 14 forms an annular exhaust port 140. No matter how the blowing structure 20 rotates, the airflow can be drawn into the annular exhaust port 140 after flowing from the central area of ​​the surface 32 to the edge. Thus, some of the dust that is peeled off from the surface 32 can be received by the annular exhaust port 140, while the dust that is not absorbed by the annular exhaust port 140 in time will be blocked by the dust removal hood 10. The inner wall surface of the dust removal chamber 12 is a conical surface 124, which can guide dust and particles to flow downward along the inner wall surface, making it easier for dust and particles to gather at the exhaust port 140 under the action of gravity. The annular exhaust port 140 then draws in this part of the dust. Therefore, through the combined action of the blowing structure 20, the dust cover 10 and the annular exhaust port 140, it is easy to clean and collect dust and particles, effectively reducing the possibility of particles and dust falling into the external environment of the item to be cleaned 30, and improving the external environment of the item to be cleaned 30.

[0101] Please refer to Figure 3 and Figure 4 In some embodiments, the dust cover 10 is axially extendable and deformable. The second end 122 of the dust cover 10 is provided with a first driving structure 40. The first driving structure 40 is used to drive the blowing structure 20 to rotate, and to drive the blowing structure 20 to move axially. It is also used to drive the dust cover 10 to extend and retract axially to change the axial distance between the exhaust port 140 and the second end 122.

[0102] As can be seen, the first drive structure 40 can also drive the dust cover 10 to extend and retract axially, thereby changing the axial distance between the exhaust port 140 and the second end 122. This allows the dust removal assembly 1 to adapt to items 30 of different sizes and shapes to be cleaned. By adjusting the axial position of the dust cover 10, the distance between the exhaust port 140 and the surface 32 to be cleaned is reduced, allowing the cleaned airflow to be better drawn into the exhaust port 140. This maximizes the collection of dust and particles detached from the surface 32 to be cleaned, improving the dust removal efficiency and practicality of the dust removal assembly 1. Furthermore, the above-mentioned configuration of the dust cover 10 can adapt to situations where the item to be cleaned is inserted into the dust removal chamber 12 for cleaning, and can also adapt to situations where the item to be cleaned is in different axial positions, demonstrating good adaptability.

[0103] For example, the first drive structure 40 includes a third driver and a pull rod. The third driver can drive the pull rod to move axially. The pull rod is located outside the dust cover 10 and extends axially. One end of the pull rod is connected to the first end 120 of the dust cover 10. The axial movement of the pull rod can realize the axial expansion and contraction deformation of the dust cover 10.

[0104] Please refer to Figure 4 and Figure 5 In some embodiments, on the longitudinal section of the dust collector hood 10, the orthographic projection of the edge of the air outlet 22 lies within the orthographic projection range of the edge of the exhaust outlet 140. The longitudinal section of the dust collector hood 10 passes through the central axis of the dust collection chamber 12.

[0105] As can be seen, the orthographic projection of the edge of the blower 22 is located within the orthographic projection range of the edge of the exhaust vent 140. Therefore, the blower 22 and the exhaust vent 140 are arranged radially opposite each other, reducing the axial distance between the blower 22 and the exhaust vent 140. By blowing and sucking simultaneously, a closed airflow circulation path can be formed, so that the airflow blown out from the blower 22 can evenly cover the surface 32 to be cleaned, and the dust and particles that are peeled off can be sucked into the dust removal chamber 12 in a timely and effective manner through the exhaust vent 140. This helps to reduce the turbulence of the airflow during the flow process, and the airflow flows more smoothly and orderly, improving the dust removal efficiency of the dust removal component 1.

[0106] It is understandable that regardless of whether the dust cover 10 can be stretched or deformed in the axial direction, the air outlet 22 can be radially opposite to the air outlet 140 so that the detached particles can be drawn into the negative pressure chamber 14 in a timely manner with the airflow.

[0107] Please refer to Figure 4 and Figure 5 In some embodiments, the dust cover 10 has a conical structure, with the first end 120 of the dust cover 10 being the large end of the conical surface. The diameter of the large end is D2, where 1.05*D≤D2≤1.15*D. Therefore, the diameter of the large end of the dust cover 10 is slightly larger than the diameter of the surface 32 to be cleaned. This allows the item 30 to be cleaned to be inserted into the dust cover 10 when the dust removal assembly 1 cleans the item 30. When the blowing structure 20 cleans the surface to be cleaned, the dust cover 10 can effectively block particles and dust during the cleaning process, effectively reducing the possibility of particles and dust falling into the external environment of the item 30 to be cleaned, thus improving the external environment of the item 30 to be cleaned.

[0108] Please refer to Figure 4 and Figure 5 In some embodiments, the axial distance between the dust cover 10 and the item to be cleaned 30 is L3, where 3mm ≤ L3 ≤ 8mm. By setting the axial distance between the dust cover 10 and the item to be cleaned 30 within the range of 3mm to 8mm, a relatively closed environment is formed between the dust cover 10 and the item to be cleaned 30. This can, to a certain extent, block particles and dust blown off by the blowing structure 20, reducing the possibility of particles and dust falling into the external environment of the item to be cleaned 30 and reducing the amount of particles falling into the surrounding environment. For example, L3 can be 3mm, 4mm, 5mm, 7mm, or 8mm, etc.

[0109] Please refer to Figure 3 and Figure 4 In some embodiments, the dust removal assembly 1 further includes an exhaust duct 18, which is located on the outer peripheral wall of the dust removal hood 10 and connects the negative pressure chamber 14 and the collection device. When the exhaust duct 18 is working, it draws air from inside the dust removal hood 10 to facilitate the formation of a negative pressure area in the negative pressure chamber 14. The particles and dust sucked in by the exhaust port 140 can be transported to the exhaust duct 18 through the negative pressure chamber 14, and then the exhaust duct 18 transports the particles and dust to the collection device for subsequent cleaning and treatment.

[0110] Please refer to Figure 4 In some embodiments, the dust hood 10 further includes a fixing ring block 16. One end of the fixing ring block 16 is connected to the housing 44 of the first drive structure 40, and the other end is connected to the end face of the dust removal chamber 12 away from the item 30 to be cleaned. The fixing ring block 16 enhances the connection strength between the second end 122 of the dust hood 10 and the housing 44 of the first drive structure 40. That is, when the dust hood 10 is subjected to impacts such as dust and particles or wind, the fixing ring block 16 can effectively resist these external forces, so that the position of the dust hood 10 will not change, thus improving the structural stability of the dust removal assembly 1.

[0111] Please refer to Figure 6 and Figure 7 Secondly, embodiments of this application provide a dust removal device 2, including: a conveying component 50, a plurality of limiting components 60, and the aforementioned dust removal component 1. The conveying component 50 is used to move along a first direction (e.g., Figure 6 Intermittent conveying in the first direction (AA' direction), multiple limiting components 60 are spaced apart on the conveying component 50, each limiting component 60 is used to mount the item 30 to be cleaned, the limiting component 60 is fixedly mounted on the conveying component 50, and the limiting component 60 is adapted to drive the item 30 to be cleaned to move intermittently along the first direction with the conveying component 50, and dust removal components 1 are spaced apart on the limiting components 60 in the second direction (e.g., AA' direction). Figure 6 The dust removal assembly 1 is positioned on one side of the BB' direction in the middle, and is adapted to be sequentially opposite to the cleaning surfaces 32 of a plurality of items 30 to be cleaned. The second direction intersects the first direction, and the second direction is parallel to the extension direction of the central axis of the dust removal chamber 12.

[0112] As can be seen, the conveying component 50 is used to intermittently convey the items 30 to be cleaned, ensuring that each item 30 has sufficient time to remain at the dust removal component 1 for thorough cleaning. By setting up the conveying component 50, the items 30 can automatically and continuously enter and leave the dust removal area, improving the cleaning efficiency of the dust removal device 2. Multiple limiting components 60 are spaced apart on the conveying component 50, each used to mount the items 30 to be cleaned. This allows the user to place multiple items 30 on multiple limiting components 60, which are then conveyed to the dust removal component 1 by the conveying component 50. The cleaning process facilitates the improvement of the working efficiency of the dust removal device 2. Simultaneously, the setting of the limiting component 60 makes the item to be cleaned 30 more stable when moving on the conveying component 50, reducing the possibility of the item 30 falling off the conveying component 50 and improving the reliability of the dust removal device 2. Furthermore, the setting of the limiting component 60 makes the item 30 more stable during cleaning by the dust removal component 1, improving the cleaning effect of the dust removal device 2. The dust removal component 1 is suitable for being positioned opposite to the surface 32 of the item 30 to be cleaned, thus improving the cleanliness of the surface 32. Therefore, through the coordinated work of the conveying component 50, multiple limiting components 60, and the dust removal component 1, the working efficiency of the dust removal device 2 is improved.

[0113] It is understood that there can be one dust removal component 1 or multiple components, which can improve the working efficiency of the dust removal device 2. For example, multiple dust removal components 1 can be arranged sequentially along the first direction, and during the time when the conveying component 50 stops running, multiple dust removal components 1 can clean multiple items 30 to be cleaned; or, for example, the limiting component 60 is provided with dust removal components 1 on both sides in the second direction, which can facilitate the simultaneous cleaning of the surfaces 32 to be cleaned on both sides of the items 30 to be cleaned, further improving the working efficiency of the dust removal device 2.

[0114] Please refer to Figure 6 and Figure 7 In some embodiments, the dust removal device 2 is used to remove dust from the rubbing surface of the cylindrical battery cell, i.e., the surface 32 to be cleaned is the rubbing surface of the cylindrical battery cell; the limiting component 60 defines a limiting groove 62, the groove wall of the limiting groove 62 being an arc surface 620, the axial direction of the arc surface 620 being parallel to the axial direction of the dust removal chamber 12. The blowing structure 20 can rotate relative to the dust removal hood 10 around the central axis of the dust removal chamber 12; and / or, the limiting component 60 is provided with a second driving structure, the second driving structure being used to drive the battery cell to rotate relative to the dust removal hood 10 around the central axis of the dust removal chamber 12. Exemplarily, the rubbing surface of the cylindrical battery cell is the axial end face of the cylindrical battery cell; at least one of the two axial end faces of the cylindrical battery cell is the rubbing surface.

[0115] As can be seen, the dust removal device 2 is used to remove dust from the flat surface of the cylindrical battery cell. After the cylindrical battery cell undergoes the flattening process, some particles and dust will remain on the flat surface. By using the dust removal device 2, the cleanliness of the surface 32 to be cleaned after the flattening process of the cylindrical battery cell can be improved, which facilitates the subsequent processing of the battery cell. The groove wall of the limiting groove 62 is an arc surface 620 that matches the outer surface of the cylindrical battery cell, making the cylindrical battery cell more stable when it is conveyed by the conveying component 50 and cleaned by the dust removal component 1, which can improve the reliability of the dust removal device 2. Moreover, the axis of the arc surface 620 is parallel to the axis of the dust removal chamber 12, so that the user only needs to place the cylindrical battery cell on the limiting component 60 without making complicated position adjustments, which can improve the working efficiency of the dust removal device 2. The blowing structure 20 can rotate relative to the dust cover 10 around the central axis of the dust removal chamber 12, so that the airflow passes through a larger cleaning area during the rotation of the blowing structure 20, which is conducive to improving the cleaning efficiency of the dust removal device 2; and / or, the battery cell is driven to rotate around the central axis of the dust removal chamber 12 by the second driving structure, which is also conducive to cleaning the entire kneading surface.

[0116] Optionally, when both the blower structure 20 and the cylindrical battery cell rotate, their rotation directions are opposite, which helps to improve cleaning efficiency.

[0117] Thirdly, this application provides a battery production line, including a flattening device and the aforementioned dust removal device 2. The flattening device is used to flatten the tabs of cylindrical cells to form a flattened surface, and the dust removal device 2 is used to remove dust from the flattened surface.

[0118] As can be seen, the battery production line first uses a flattening device to flatten the tabs of the cylindrical cells to form a flattened surface on the cylindrical cells, and then uses a dust removal device 2 to remove dust from the flattened surface. Compared with performing the flattening and dust removal processes on the cells simultaneously, which may result in incomplete cleaning, this application separates the flattening and dust removal processes, which can more effectively remove particles and dust attached to the flattened surface, facilitating subsequent processing of the cells and thus improving the product quality of the batteries. Therefore, by using the aforementioned dust removal device 2, the product quality of the batteries can be improved.

[0119] Please refer to this again. Figures 1-7 This application describes a specific embodiment of a dust removal device 2. The dust removal device 2 is used for dust removal on the flat surface of cylindrical battery cells. The dust removal device 2 includes a conveying component 50, a plurality of limiting components 60, and a dust removal component 1.

[0120] The conveying assembly 50 is used for intermittent conveying along the first direction. Each limiting assembly 60 is used to install cylindrical battery cells and is adapted to drive the cylindrical battery cells to move intermittently along the first direction following the conveying assembly 60. The limiting assembly 60 defines a limiting groove 62. The groove wall of the limiting groove 62 is an arc surface 620. The axial direction of the arc surface 620 is parallel to the axial direction of the dust removal chamber 12. The dust removal assembly 1 is spaced apart on one side of the limiting assembly 60 in the second direction, and the dust removal assembly 1 is adapted to be opposite to multiple cylindrical battery cells in sequence.

[0121] The dust removal assembly 1 includes a dust removal hood 10, a blowing structure 20, and a first driving structure 40. The dust removal hood 10 has a dust removal chamber 12. The dust removal chamber 12 has a first end 120 and a second end 122 arranged opposite each other along the axial direction. The first end 120 of the dust removal chamber is open and is adapted to be arranged sequentially with the crumpled plane of the battery cell along the axial direction. The dust removal hood 10 also has a negative pressure chamber 14 separated from the dust removal chamber 12. The negative pressure chamber 14 forms an annular exhaust port 140. The exhaust port 140 is provided on the cavity wall of the dust removal chamber 12 to connect the negative pressure chamber 14 and the dust removal chamber 12. On the longitudinal section of the dust removal hood 10, the orthographic projection of the edge of the blowing port 22 is located within the orthographic projection range of the edge of the exhaust port 140.

[0122] The blowing structure 20 is disposed inside the dust removal chamber 12, and the blowing structure 20 has a blowing port 22. The blowing port 22 is adapted to blow air toward the side where the first end 120 is located, and the central axis of the blowing port 22 forms an acute angle with the central axis of the dust removal chamber 12. The acute angle α between the central axis of the blowing port 22 and the central axis of the dust removal chamber 12 satisfies 30°≤α≤60°. The blowing structure 20 is an air knife. The blowing structure 20 includes a first part 24, a second part 25 and a third part 26 arranged sequentially along the axial direction. The first part 24 extends straight along the axial direction. The second part 25 extends obliquely relative to the axial direction and bends to connect the first part 24 and the third part 26. The blowing port 22 is formed at the free end of the third part 26. The flow area of ​​the third part 26 decreases in the direction toward the blowing port 22.

[0123] The inner wall surface of the dust removal chamber 12 is a conical surface 124. The blowing structure 20 can rotate relative to the dust removal hood 10 around the central axis of the dust removal chamber 12. The large end of the conical surface 124 corresponds to the first end 120. The air outlet 22 is radially spaced from the central axis of the dust removal chamber 12, and the air outlet 22 extends radially towards the direction close to the central axis of the dust removal chamber 12. The radial distance x between the air outlet 22 and the central axis of the dust removal chamber 12 satisfies 0.1*D≤x≤0.3*D, where D is the diameter of the kneading plane.

[0124] The second end 122 of the dust collector hood 10 is open and is provided with a first drive structure 40. The first drive structure 40 has a drive shaft 42 connected to the blowing structure 20. A flow channel communicating with the blowing structure 20 is formed in the drive shaft 42. The drive shaft 42 is at least used to drive the blowing structure 20 to rotate. The housing 44 of the first drive structure 40 is fixed to the dust collector hood 10 and closes the second end 122 of the dust collector hood 10. The first drive structure 40 is also used to drive the blowing structure 20 to move axially to change the axial distance between the blowing structure 20 and the second end 122. The first drive structure 40 is also used to drive the dust collector hood 10 to extend and retract axially to change the axial distance between the exhaust port 140 and the second end 122.

[0125] In the above technical solution, when the dust removal device 2 is working normally, the operator can first place multiple cylindrical battery cells that have undergone the flattening process on multiple limiting components 60. The conveying component 50 drives the multiple cylindrical battery cells placed on the limiting components 60 to move along the first direction, so that the dust removal component 1 and the multiple cylindrical battery cells are in sequence opposite each other. That is, the dust removal component 1 sequentially removes dust from the flattening surface of the multiple cylindrical battery cells. The blowing port 22 of the blowing structure 20 blows air at a certain angle to the central axis of the flattening surface. The blowing port 22 extends radially towards the direction close to the central axis of the dust removal chamber 12. The first driving structure 40 drives the blowing structure 20 to rotate and blow air, so that the airflow intensity is high in the central area of ​​the flattening surface, thereby effectively removing the particles generated by the battery cells in the flattening process and the particles attached during transportation, especially the large amount of dust and particles remaining in the center of the flattening surface. At the same time, with the design of the dust removal hood 10 and the annular exhaust port 140, the particles and dust generated in the process can be effectively collected and cleaned, so that the dust removal device 2 has a good cleaning effect.

[0126] In some embodiments, the first driving structure 40 is also used to drive the dust removal hood 10 to extend and retract axially. In the battery production line, workers can place multiple battery cells that have undergone the flattening process on multiple limiting components 60, and then the conveying component 50 sequentially conveys the battery cells to be cleaned to the dust removal component 1. The first driving structure 40 drives the dust removal hood 10 to extend axially toward the battery cell, so that the flattened surface of the battery cell is located inside the dust removal hood 10. Then the dust removal component 1 is activated to clean the flattened surface. After cleaning, the first driving structure 40 drives the dust removal hood 10 to retract axially away from the battery cell, so that the battery cell will not interfere with the dust removal hood 10. Then the conveying component 50 conveys the next battery cell to be cleaned to the dust removal component 1, and the first driving structure 40 drives the dust removal hood 10 to extend axially toward the battery cell. This cycle is repeated to facilitate the automated cleaning of the flattened surface of the battery cell, and the cleaned dust and particles will not affect the external environment of the battery cell.

[0127] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0128] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dust removal assembly, characterized by, The dust removal assembly is used for dust removal of a to-be-cleaned surface of a to-be-cleaned article, and comprises: a dust removal cover having a dust removal cavity therein, the dust removal cavity having a first end and a second end arranged in axial opposition, the first end of the dust removal cavity being open, and the first end of the dust removal cavity being adapted to be arranged in axial sequence with the to-be-cleaned surface; a blowing structure arranged in the dust removal cavity and having a blowing port, the blowing port being adapted to blow toward a side where the first end is located, and a central axis of the blowing port and a central axis of the dust removal cavity forming an acute angle.

2. The dust extraction assembly of claim 1, wherein, An acute angle α between the central axis of the blowing port and the central axis of the dust removal cavity satisfies 30°≤α≤60°.

3. The dust extraction assembly of claim 1, wherein, The blowing structure is a wind knife.

4. The dust extraction assembly of claim 3, wherein, The blowing structure comprises a first portion, a second portion and a third portion arranged in axial sequence, the first portion extending linearly along the axial direction, the second portion extending obliquely relative to the axial direction and being bently connected between the first portion and the third portion, the blowing port being formed at a free end of the third portion, and a flow passage area of the third portion decreasing in a direction toward the blowing port.

5. The dust extraction assembly of claim 1, wherein, An inner wall surface of the dust removal cavity is a conical surface, the blowing structure being rotatable about the central axis of the dust removal cavity relative to the dust removal cover, and a large end of the conical surface corresponding to the first end.

6. The dust extraction assembly of claim 5, wherein, The blowing port and the central axis of the dust removal cavity are arranged in radial separation, and the blowing port extends obliquely in a radial direction toward the central axis of the dust removal cavity.

7. The dust extraction assembly of claim 6, wherein, A radial distance x between the blowing port and the central axis of the dust removal cavity satisfies 0.1*D≤x≤0.3*D, D being a diameter of the to-be-cleaned surface.

8. The dust extraction assembly of claim 5, wherein, The second end of the dust removal cover is open and provided with a first driving structure, the first driving structure having a driving shaft connected with the blowing structure, the driving shaft having a flow channel formed therein and communicating with the blowing structure, and the driving shaft being used at least for driving the blowing structure to rotate, a housing of the first driving structure being fixed with the dust removal cover and enclosing the second end of the dust removal cover.

9. The dust extraction assembly of claim 5, wherein, The second end of the dust removal cover is provided with a first driving structure, the first driving structure being used for driving the blowing structure to rotate and also for driving the blowing structure to move in the axial direction so as to change an axial distance between the blowing structure and the second end.

10. The dust extraction assembly of any one of claims 1-8, wherein, The dust removal cover further has a negative pressure cavity arranged in separation from the dust removal cavity, the negative pressure cavity being formed with an annular suction port, the suction port being arranged at an end surface of the dust removal cover corresponding to the first end, or the suction port being arranged at a cavity wall of the dust removal cavity so as to communicate the negative pressure cavity and the dust removal cavity.

11. The dust extraction assembly of claim 10, wherein, The dust removal cover is axially telescopic, the second end of the dust removal cover being provided with a first driving structure, the first driving structure being used for driving the blowing structure to rotate, for driving the blowing structure to move in the axial direction, and also for driving the dust removal cover to telescope in the axial direction so as to change an axial distance between the suction port and the second end.

12. The dust extraction assembly of claim 10, wherein, In a longitudinal section of the dust removal cover, a normal projection of a rim of the blowing port is located within a normal projection range of a rim of the suction port.

13. A dust extraction device characterised in that, The dust removal assembly comprises: a conveying assembly for intermittently conveying in a first direction; a plurality of limiting assemblies, the plurality of limiting assemblies are spaced apart from the conveying assembly along the first direction, each of the limiting assemblies is configured to mount a to-be-cleaned article and to drive the to-be-cleaned article to follow the conveying assembly to intermittently move in the first direction; a dust removal assembly according to any one of claims 1-12, the dust removal assembly is spaced apart from the limiting assemblies on one side of the limiting assemblies in a second direction, and is adapted to be sequentially opposite to a to-be-cleaned surface of the plurality of to-be-cleaned articles, the second direction intersects the first direction, and the second direction is parallel to the extension direction of the central axis of the dust removal cavity.

14. The dust extraction device of claim 13, wherein, The dust removal device is used for dust removal on a flattening surface of a cylindrical battery cell, the limiting assembly defines a limiting groove, a groove wall of the limiting groove is an arc surface, an axial direction of the arc surface is parallel to an axial direction of the dust removal cavity, the blowing structure is rotatable about the central axis of the dust removal cavity relative to the dust removal cover; and / or, the limiting assembly is provided with a second driving structure, the second driving structure is used to drive the battery cell to rotate about the central axis of the dust removal cavity relative to the dust removal cover.

15. A battery production line, characterized by The dust removal device according to claim 14 is used for dust removal on a flattening surface of a cylindrical battery cell, the limiting assembly defines a limiting groove, a groove wall of the limiting groove is an arc surface, an axial direction of the arc surface is parallel to an axial direction of the dust removal cavity, the blowing structure is rotatable about the central axis of the dust removal cavity relative to the dust removal cover; and / or, the limiting assembly is provided with a second driving structure, the second driving structure is used to drive the battery cell to rotate about the central axis of the dust removal cavity relative to the dust removal cover. The dust removal device according to claim 14 is used for dust removal on a flattening surface of a cylindrical battery cell, the limiting assembly defines a limiting groove, a groove wall of the limiting groove is an arc surface, an axial direction of the arc surface is parallel to an axial direction of the dust removal cavity,

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