Battery packaging device and battery processing equipment
By designing the convex and concave structures of the seal head in the battery packaging device, combined with the use of support members and support frames, the wrinkle problem that the packaging film is prone to occur during battery packaging is solved, and the reliability and yield of the packaging are improved. Ensures the sealing and flatness of the packaging structure.
Patent Information
- Application Number
- CN202422392711.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-09-30
AI Technical Summary
During the battery packaging process, the packaging film is prone to wrinkles or deformation, resulting in a decrease in packaging effect and reliability.
By designing the convex and concave structures of the seal head, they can match each other during the packaging process, straighten the packaging film, reduce the possibility of wrinkles, and ensure the flatness of the packaging area through the arrangement of the support members and support frames. stability.
It improves the reliability and product yield of battery packaging, reduces the risk of damage to the packaging film during vacuuming or hot pressing, and ensures the sealing and smoothness of the packaging structure.
Smart Images
Figure CN222214228U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a battery packaging device and battery processing equipment. Background Technology
[0002] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.
[0003] The development of battery technology must take into account multiple design factors. For example, improving the processing reliability and product yield of batteries is an important research direction in the battery field. Utility Model Content
[0004] This application provides a battery packaging device and a battery processing equipment, which can improve processing reliability and product yield.
[0005] In a first aspect, embodiments of this application provide a battery encapsulation device, including a main body, a negative pressure component, and an encapsulation component. The negative pressure component is disposed in the main body and includes a negative pressure cavity. The encapsulation component is housed in the negative pressure cavity and includes a first end cap and a second end cap. The side of the first end cap facing the second end cap has a first pressing surface and a protrusion protruding from the first pressing surface. The side of the second end cap facing the first end cap has a second pressing surface and a recessed portion disposed relative to the second pressing surface. The first pressing surface and the second pressing surface are opposite to each other, and the protrusion and the recess are opposite to each other.
[0006] In the technical solution of this application embodiment, the battery encapsulation device can be used to evacuate the battery substrate and heat and pressurize the encapsulation film therein to form a well-sealed encapsulation structure. The battery encapsulation device includes a main body, a negative pressure component and an encapsulation component mounted on the main body, and the encapsulation component includes a first end cap and a second end cap arranged facing each other, each having a convex part and a concave part with matching shapes. By making the opposing surfaces of the two end caps have a concave-convex structure, the encapsulation film can be pressed tightly by the convex part during the encapsulation process, so as to generate a force on the encapsulation film pointing towards the first end cap and the second end cap, thereby straightening the encapsulation film and reducing the possibility of wrinkles in the encapsulation film during the negative pressure or hot-press encapsulation process, thereby improving reliability and product yield.
[0007] According to some embodiments of this application, the battery packaging device further includes a support member for supporting the battery substrate to be packaged; a first pressing surface and a second pressing surface are disposed on a side close to the support member, both of which are planar and parallel to the support surface of the support member. By setting the two pressing surfaces close to the support member and the battery substrate to be packaged as planar surfaces and extending them parallel to the support surface, at least a portion of the packaged area near the center of the substrate can be made flat and extend in the same direction as other areas around the substrate.
[0008] According to some embodiments of this application, the convex portion has a first surface on the side near the concave portion, and the concave portion has a second surface on the side near the convex portion. The convex portion and the first pressing surface are arranged along a first direction. Both the first surface and the second surface include multiple arcuate segments arranged along the first direction. The multiple arcuate segments are connected and smoothly transitioned in the first direction. The surfaces of the convex portion and the concave portion that are close to each other can be composed of multiple arcuate segments connected in sequence to facilitate adjustment of the shape and size of the convex portion, while reducing the possibility of damage to the encapsulation film caused by sharp edges of the convex portion and the concave portion.
[0009] According to some embodiments of this application, within a cross-section perpendicular to the extension direction of the first head, the cross-sectional shape formed by multiple arc segments is an arc shape. Setting each arc surface as an arc surface facilitates the processing of both the convex and concave portions.
[0010] According to some embodiments of this application, in a first direction, the central axes of two adjacent arcuate segments located in the convex portion are respectively located on opposite sides of the first surface, and the central axes of two adjacent arcuate segments located in the concave portion are respectively located on opposite sides of the second surface. This makes the bending directions of adjacent arcuate segments opposite, facilitating the formation of a convex structure and a smooth transition between adjacent arcuate segments.
[0011] According to some embodiments of this application, the convex and concave portions have a first surface and a second surface respectively on the side closest to each other. Both the first and second surfaces include multiple arcuate segments and one or more planar segments, with the planar segments and arcuate segments alternating. The convex and concave portions may also adopt an alternating form of arcuate segments and planar segments, with each planar segment having surface edges or arcuate segments on both sides to reduce the possibility of sharp corners at the junction.
[0012] According to some embodiments of this application, the negative pressure assembly further includes a pressure plate disposed in the negative pressure cavity and disposed opposite to the support member. In a first direction, the orthogonal projection of the pressure plate at least partially overlaps with the orthogonal projection of the support member. The pressure plate can cooperate with the support member to fix the battery substrate to be packaged, thereby reducing the possibility of problems such as relative misalignment between the battery substrate and the end cap during the packaging process.
[0013] According to some embodiments of this application, the support member is movably connected to the negative pressure assembly or the main body, and the support member can move relative to the negative pressure assembly in a first direction to enter or leave the negative pressure chamber. This allows the battery packaging device to be conveniently moved to the position of the substrate to be packaged via the support member, so as to facilitate alignment with the first end cap and the second end cap.
[0014] According to some embodiments of this application, the encapsulation assembly further includes a first support frame and a second support frame mounted on the main body. At least one of the first support frame and the second support frame is movably connected to the main body. The first end cap and the second end cap are disposed on the side of the first support frame and the second support frame closer to each other. The end cap is supported and positioned by the first support frame and the second support frame, and the relative position and spacing between the two end caps are changed by the relative movement of either support frame relative to the main body.
[0015] According to some embodiments of this application, the first support frame and the second support frame are arranged along a second direction, and both the first support frame and the second support frame are movable relative to the main body along the second direction. By flexibly adjusting the positions of the first end cap and the second end cap using the first support frame and the second support frame, they can be adapted to battery substrates of different sizes and parameters to be packaged, thus expanding the applicability of the battery packaging device.
[0016] According to some embodiments of this application, in the second direction, the first support frame and the second support frame are at least partially disposed on opposite sides of the negative pressure assembly, and the first end cap and the second end cap extend into the negative pressure cavity. By setting the support frames to adjust the relative positions of the first end cap, the second end cap, and the negative pressure cavity, the possibility of interference between the end caps and the substrate to be packaged entering or exiting the cavity is reduced.
[0017] According to some embodiments of this application, in the first direction, the dimensions of the first end cap and the second end cap are 5mm-10mm, and the size of the protrusion protruding from the first pressing surface is smaller than the size of the first end cap in the first direction. This ensures that the encapsulation area formed by the interlocking and pressing of the first and second end caps has a suitable width, while reducing the possibility of damage to the encapsulation film due to excessive protrusion of the protrusion.
[0018] Secondly, embodiments of this application provide a battery processing apparatus, including the battery packaging device in any embodiment of the first aspect. Attached Figure Description
[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0020] Figure 1 This is a schematic diagram of the structure of a battery packaging device provided in some embodiments of this application;
[0021] Figure 2 This is a schematic diagram of the structure of the encapsulation components provided in some embodiments of this application;
[0022] Figure 3 for Figure 2 A cross-sectional view at point A-A' shown;
[0023] Figure 4 for Figure 3 An enlarged view of region P shown;
[0024] Figure 5 for Figure 2 Another sectional view at point A-A' shown.
[0025] Figure label:
[0026] 100 - Battery packaging device; 200 - Substrate to be packaged;
[0027] 10-Main body; 20-Negative pressure component; 30-Encapsulation component; 40-Supporting component; 50-First support frame; 60-Second support frame;
[0028] 31-First end cap; 32-Second end cap; 41-Supporting surface;
[0029] 311-first pressing surface; 312-convex portion; 313-first surface; 321-second pressing surface; 322-concave portion; 323-second surface;
[0030] X - First direction; Y - Second direction. Detailed Implementation
[0031] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.
[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0033] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.
[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0035] 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.
[0036] 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).
[0037] 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.
[0038] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0039] In this embodiment of the application, the battery cell can be a secondary battery cell, which refers to a battery cell that can be used again after being discharged by recharging to activate the active materials.
[0040] The battery cell can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., but the embodiments of this application are not limited to this.
[0041] A single battery cell typically includes an electrode assembly. The electrode assembly consists of a positive electrode and a negative electrode. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes.
[0042] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.
[0043] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.
[0044] The battery 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.
[0045] In some embodiments, the battery can be a battery pack, which includes a housing and individual battery cells, with the individual battery cells or battery modules housed within the housing.
[0046] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.
[0047] In existing battery manufacturing processes, there is usually a process step of wrapping the electrode assembly in a sealing film and then hot-pressing the sealing film to form a sealing structure. In this step, a battery sealing device is usually required, which heats and pressurizes the sealing film from both sides through two pressure heads. Optionally, when sealing the last edge of the sealing film, the cavity inside the sealing film can be evacuated first so that a preset environment can be formed inside the sealed film.
[0048] However, the encapsulation film in the substrate to be encapsulated is usually made of materials such as aluminum-plastic film, which is prone to wrinkles or deformation during the vacuuming process, resulting in unevenness during encapsulation, which in turn leads to a decrease in encapsulation effect and reliability.
[0049] In view of this, the present application provides a technical solution in which the possibility of wrinkles appearing in the encapsulation film during the encapsulation process is reduced by changing the structural form of the end cap, thereby improving processing reliability and product yield.
[0050] The technical solutions described in this application are applicable to batteries and electrical devices that use batteries. Electrical devices include, for example, mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools. Spacecraft include, for example, airplanes, rockets, space shuttles, and spacecraft. Electric toys include, for example, stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include, for example, 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.
[0051] The battery encapsulation apparatus described in this application is not limited to the batteries described above, but can also be applied to other applications requiring the encapsulation of thin, easily wrinkled materials, providing protection. However, for the sake of brevity, the following embodiments are all described using battery encapsulation as an example.
[0052] Next, we will combine the appendix Figure 1 To be continued Figure 5 The structure of the battery packaging device 100 is described.
[0053] Please refer to the following: Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of a battery packaging device provided in some embodiments of this application. Figure 2 This is a schematic diagram of the structure of the encapsulation component provided in some embodiments of this application. Figure 3 for Figure 2 A cross-sectional view at point A-A' shown.
[0054] In a first aspect, embodiments of this application provide a battery encapsulation device 100, including a main body 10, a negative pressure component 20, and an encapsulation component 30. The negative pressure component 20 is disposed on the main body 10 and includes a negative pressure cavity. The encapsulation component 30 is accommodated in the negative pressure cavity and includes a first end cap 31 and a second end cap 32. The side of the first end cap 31 facing the second end cap 32 has a first pressing surface 311 and a protrusion 312 protruding from the first pressing surface 311. The side of the second end cap 32 facing the first end cap 31 has a second pressing surface 321 and a recess 322 recessed relative to the second pressing surface 321. The first pressing surface 311 is opposite to the second pressing surface 321, and the protrusion 312 is opposite to the recess 322.
[0055] The battery encapsulation device 100 provided in this application includes a main body 10 for providing support and fixation, a negative pressure component 20 for evacuating the encapsulation film inside the substrate 200 to be encapsulated, and an encapsulation component 30 for performing thermo-press encapsulation. The substrate 200 to be encapsulated may include electrode components, adapter pieces electrically connected to the tabs in the electrode components, and an encapsulation film that encapsulates the main body of the electrode components. The battery encapsulation device 100 in this application is used to perform thermo-press encapsulation on the encapsulation film, connecting the stacked encapsulation films to form an encapsulation structure with good sealing performance that accommodates the main body of the electrode components.
[0056] Specifically, the main body 10 may be configured as a support frame and can be shaped to fit each component to be installed, thus providing mounting positions for each component. In addition to the negative pressure component 20 and the encapsulation component 30, other necessary components may also be mounted on the main body 10, such as a transmission component for transporting the substrate 200 to be encapsulated and a controller.
[0057] The negative pressure assembly 20 is connected to the main body 10 and can be a fixed connection such as welding or a detachable connection such as fasteners or snap-fit. The negative pressure assembly 20 can include a negative pressure chamber and multiple air extraction components connected to the negative pressure chamber, and can extract air from the negative pressure chamber through these air extraction components to achieve negative pressure extraction inside the encapsulation film of the substrate 200 to be encapsulated before encapsulation.
[0058] The encapsulation component 30 is connected to the main body 10. The encapsulation component 30 includes a first end cap 31 and a second end cap 32 arranged opposite to each other. The two end caps can be movably connected to the main body 10 directly or indirectly to realize relative movement between the two, switching between a working state of pressing for encapsulation and a non-working state of being detached from the substrate 200 to be encapsulated.
[0059] The first end cap 31 and the second end cap 32 have matching shapes on their surfaces near each other, so that the two end caps can fit tightly into each other after moving towards each other. The first end cap 31 has a first pressing surface 311 and a protrusion 312 on the side near the second end cap 32. The two can be arranged along a first direction X. The first pressing surface 311 can be a plane or a curved surface. The protrusion 312 is located on one side of the first pressing surface 311 and protrudes from the first pressing surface 311. The protrusion 312 and the first pressing surface 311 can be connected.
[0060] The protrusion 312 protrudes towards the second end cap 32. Optionally, in the first direction X, one edge of the protrusion 312 may be connected to the first pressing surface 311, while the other edge is connected to the edge of the first end cap 31; or, in the first direction X, both edges of the protrusion 312 may be connected to the first pressing surface 311. The specific configuration can be determined according to the shape and size of the recess.
[0061] Corresponding to the first end cap 31, the second end cap 32 is provided with a second pressing surface 321 and a recess 322, which are respectively provided with corresponding shapes to the first pressing surface 311 and the protrusion 312, allowing them to be pressed together respectively. When the first end cap 31 and the second end cap 32 are close to or abut against each other, the protrusion 312 extends at least partially into the recess 322.
[0062] Optionally, in embodiments where the first end cap 31 and the second end cap 32 have sufficient width, the first end cap 31 may simultaneously have a protrusion 312 protruding relative to the first pressing surface 311 and a recessed area relative to the first pressing surface 311. The recessed area may be located on the side of the protrusion 312 away from the first pressing surface 311, or it may be located between the protrusion 312 and the first pressing surface 311. Correspondingly, the second end cap 32 may have a protruding area, thereby further increasing the area and width of the contact interface when the first end cap 31 and the second end cap 32 are pressed together.
[0063] In the technical solution of this application embodiment, the battery packaging device 100 can be used to evacuate the battery substrate to be packaged and heat and pressurize the packaging film therein to form a well-sealed packaging structure. The battery packaging device 100 includes a main body 10 and a negative pressure component 20 and a packaging component 30 installed on the main body 10. The packaging component 30 includes a first end cap 31 and a second end cap 32 arranged facing each other, and each of them is provided with a protrusion 312 and a recess 322 with matching shapes.
[0064] By giving the opposing surfaces of the two end caps a matching concave-convex structure, the encapsulation film can first contact the encapsulation film through the protrusion 312 during the encapsulation process, and then gradually change the encapsulation film to the same shape as the concave-convex pressing interface during the pressing process. This generates a force on the encapsulation film from the substrate 200 to the side of the first end cap 31 and the second end cap 32, thereby straightening the encapsulation film before heating and reducing the possibility of wrinkles appearing in the encapsulation film during vacuum or hot-press encapsulation, thereby improving reliability and product yield.
[0065] In some optional embodiments, the battery packaging device 100 further includes a support member 40 for supporting the battery substrate to be packaged; a first pressing surface 311 and a second pressing surface 321 are disposed on the side close to the support member 40, both the first pressing surface 311 and the second pressing surface 321 are planar, and both the first pressing surface 311 and the second pressing surface 321 are parallel to the supporting surface 41 of the support member 40.
[0066] The battery encapsulation device 100 also includes a support member 40, which supports the substrate 200 to be encapsulated via its own support surface 41. Optionally, the support member 40 can be movably connected to the main body 10 so that the support member 40 can drive the substrate 200 to be encapsulated into or out of the negative pressure chamber and the encapsulation position; or, the support member 40 can be disposed in the negative pressure chamber and located in a preset position, and the substrate 200 to be encapsulated is transported and placed on the support member 40 by a conveying mechanism.
[0067] Optionally, the support member 40 may be provided with a fixing structure to fix the position of the substrate 200 to be packaged by means of pressing, crimping, etc. Any fixing method that will not interfere with the packaging and negative pressure extraction can be used. In the first end cap 31 and the second end cap 32, the first pressing surface 311 and the second pressing surface 321 may both be provided at a position adjacent to the edge and close to the substrate 200 to be packaged. That is, the first pressing surface 311 and the second pressing surface 321 may be provided on the surfaces of the two end caps facing each other, at a position adjacent to the edge of the side closest to the support member 40.
[0068] Optionally, the first pressing surface 311 and the second pressing surface 321 can extend along mutually parallel planes and both extend parallel to the supporting surface 41. Specifically, the substrate 200 to be packaged is disposed on the supporting surface 41 of the support member 40, and its edges to be packaged and its upper and lower surfaces can generally extend parallel or nearly parallel to the supporting surface 41. By setting both the first pressing surface 311 and the second pressing surface 321 to extend parallel to the supporting surface 41, the extension direction of the two pressing surfaces can be the same as or similar to the extension direction of the edge area of the substrate 200 to be packaged, thereby making the packaged structure left after packaging and trimming extend smoothly along the preset plane, reducing the possibility of deformation of the packaged area near the center of the substrate 200 after final trimming due to the protrusions 312 and the recesses 322.
[0069] By setting the two pressing surfaces near the support 40 and the battery substrate to be packaged as planes and extending them parallel to the support surface 41, at least a portion of the packaged area near the center of the substrate 200 can be flattened and extended in the same direction as other areas around the substrate. This results in neat, straight edges after subsequent trimming and cutting processes.
[0070] Please refer to the following: Figure 4 and Figure 5 , Figure 4 for Figure 3 An enlarged view of region P shown. Figure 5 for Figure 2 Another sectional view at point A-A' shown.
[0071] In some alternative embodiments, the protrusion 312 has a first surface 313 on the side near the recess 322, and the recess 322 has a second surface 323 on the side near the protrusion 312. Both the first surface 313 and the second surface 323 include a plurality of arcuate segments arranged along the first direction X. The plurality of arcuate segments are connected and smoothly transitioned in the first direction X.
[0072] Optionally, the surfaces of both the protrusion 312 and the recess 322 can be composed of multiple arcuate segments. The surface of the protrusion 312 near the second end cap 32 is designated as the first surface 313. The first surface 313 can include multiple arcuate segments arranged along the first direction X. These arcuate segments can be selected to extend in the same direction as the first end cap 31 and have the same or similar extension dimensions. Their dimensions in the extension direction of the first end cap 31 are greater than the dimensions of the area to be encapsulated in the substrate 200 in that direction.
[0073] Taking the first end cap 31 as an example, optionally, the arc segments in the first surface 313 can be connected together and have the same or different diameters and lengths. In the cross section perpendicular to the extension direction of the first end cap 31, that is, in the cross section parallel to both the first direction X and the second direction Y, the cross-sectional shape formed by each arc segment can be circular or elliptical and smoothly connected to each other.
[0074] Specifically, the adjacent arc segments transition smoothly. Here, smooth transition means that the connection between adjacent arc segments does not form sharp corners, but is smoothly connected to each other. Optionally, the cross-sectional shape formed by the adjacent arc segments in the aforementioned cross section is a series of interconnected and tangent arcs, so as to reduce the possibility of the sharp corners at the connection point causing damage to the encapsulation film during the pressing process.
[0075] The surfaces of the protrusion 312 and the recess 322 that are close to each other can be formed by multiple arc surfaces connected in sequence, so as to adjust the shape and size of the protrusion 312 and reduce the possibility of damage to the encapsulation film caused by the sharp corners of the protrusion 312 and the recess 322.
[0076] In some optional embodiments, the cross-sectional shape formed by multiple arc segments in a section perpendicular to the extension direction of the first end cap 31 is an arc shape.
[0077] Optionally, each arc segment can be a circular arc surface, that is, the cross-sectional shape formed by each arc segment in the section perpendicular to the extension direction of the head can be a circular arc. Furthermore, in the extension direction of the head, multiple arcs formed by the same arc segment in multiple different sections can have the same radius and length, so that the shape of each arc segment is regular and easy to process.
[0078] For example, the first surface 313 may include two conjoined arcuate segments, with their opposite edges connected to the first pressing surface 311 and the first end cap 31, respectively. These two arcuate segments may be conjoined and may have the same or different diameters. Optionally, the cross-sectional shape formed by these two arcuate segments within the aforementioned cross-section may be two tangent circular arcs. The line connecting the centers of these two arcs may have a certain angle with the cross-sectional shape formed by the first pressing surface 311; that is, the two arcs may be arranged obliquely to form a protrusion 312 protruding from the first pressing surface 311.
[0079] Setting each arc surface as a circular arc surface makes it easier to process the convex part 312 and the concave part 322 and to make them have mutually matching shapes.
[0080] In some alternative embodiments, in the first direction X, the central axes of two adjacent arcuate segments of the protrusion 312 are located on opposite sides of the first surface 313, and the central axes of two adjacent arcuate segments of the concave portion 322 are located on opposite sides of the second surface 323.
[0081] Optionally, taking the first end cap 31 as an example, it is provided with a first pressing surface 311 and a protrusion 312. The protrusion 312 has a first surface 313, which further includes multiple arcuate segments. Two adjacent arcuate segments can be bent in opposite directions. Specifically, in a cross-section perpendicular to the extension direction of the end cap, each arcuate segment forms an arcuate cross-sectional shape. Any two adjacent arcs have two corresponding centers, which can be distributed on opposite sides of the line formed by the two arcs, so that the two arcs bend in opposite directions.
[0082] Correspondingly, the recess 322 is also provided with multiple arcuate segments. These arcuate segments are arranged in a one-to-one correspondence with the arcuate segments provided on the protrusion 312 in the arrangement direction of the first end cap 31 and the second end cap 32, so that the protrusion 312 and the recess 322 can have mutually matching surface shapes. Based on the fact that the bending directions of adjacent arcuate segments in the first surface 313 are opposite, the bending directions of adjacent arcuate segments in the second surface 323 are also opposite.
[0083] Optionally, in the first surface 313 and the second surface 323, the arc-shaped cross-sectional shapes formed by adjacent arc segments can both be set to be tangent.
[0084] By making the bending directions of adjacent arcuate segments in the first surface 313 and the second surface 323 opposite, it is easy to form a protruding / recessed structure and smoothly transition between adjacent arcuate segments.
[0085] In some alternative embodiments, the protrusion 312 and the recess 322 have a first surface 313 and a second surface 323 respectively on the side close to each other. The first surface 313 and the second surface 323 each include multiple arc segments and one or more planar segments, with the planar segments and arc segments alternately arranged.
[0086] Similar to the aforementioned method of using multiple arc segments to form the first surface 313 and the second surface 323, at least one planar segment can also be provided in the first surface 313 and the second surface 323, and the planar segment can be connected between two arc segments or between an arc segment and an edge.
[0087] Specifically, taking the first surface 313 as an example, the first surface 313 may include multiple arc segments and a planar segment, or the first surface 313 may include multiple arc segments and multiple planar segments. The planar segments and arc segments are alternately arranged, that is, the two sides of each planar segment are arc segments or the edge of the end cap, and two planar segments are not arranged adjacent to each other or connected to each other, so as to reduce the possibility of sharp corners at the junction.
[0088] In embodiments with multiple planar segments, one or more arcuate segments can be provided between adjacent planar segments, and the included angle between the planes containing the planar segments can be changed by the curvature of the arcuate segments. In the cross-sectional shape formed within the aforementioned cross-section, the cross-sectional shape formed by the planar segments can be selected to extend along the tangent direction of the cross-sectional shape formed by the adjacent arcuate segments, so that the junction between the two is smoothly transitioned. Optionally, the first pressing surface 311 can be a plane, and the first pressing surface 311 is provided at one side edge of the first end cap 31, with the arcuate segments and planar segments constituting the protrusion 312 both provided on the same side of the first pressing surface 311.
[0089] The convex portion 312 and the concave portion 322 can also be in the form of alternating arc-shaped segments and planar segments. Both sides of each planar segment can be set as surface edges or arc-shaped segments to facilitate a smooth transition at the junction and reduce the possibility of sharp corners at the junction.
[0090] In some optional embodiments, the negative pressure assembly 20 further includes a pressure plate disposed in the negative pressure cavity and disposed opposite to the support member 40, wherein the orthographic projection of the pressure plate and the orthographic projection of the support member 40 at least partially overlap in the first direction X.
[0091] Opposite to the support member 40, the negative pressure assembly 20 may further include a pressure plate for fixing the substrate 200 to be packaged on the opposite side to the support member 40. The pressure plate is at least partially disposed in the negative pressure cavity and is disposed opposite to the support member 40 in the arrangement direction of the first end cap 31 and the second end cap 32, i.e., the first direction X. Specifically, along the first direction X, the orthographic projection of the pressure plate at least partially overlaps with the orthographic projection of the support member 40, and when the substrate 200 to be packaged is supported, the aforementioned overlapping area can be covered by the orthographic projection of the substrate 200 to be packaged.
[0092] Optionally, the surface of the pressure plate facing the support 40 may have a shape that matches the substrate 200 to be encapsulated, so that its pressing against the substrate 200 is stable and reliable. The pressure plate may be a single, continuous plate, or it may be composed of multiple sub-plates spaced apart from each other.
[0093] The pressure plate can cooperate with the support member 40 to fix the battery substrate to be packaged, thereby reducing the possibility of misalignment between the battery substrate and the end cap during the packaging process.
[0094] In some alternative embodiments, the support member 40 is movably connected to the negative pressure assembly 20 or the main body 10, and the support member 40 is movable relative to the negative pressure assembly 20 in a first direction X to enter or leave the negative pressure chamber.
[0095] In an embodiment where a support member 40 is provided for carrying the substrate 200 to be packaged, the support member may be configured to be movably connected to the negative pressure assembly 20 or the main body 10 so that it can move relative to the negative pressure cavity along the first direction X, thereby driving the substrate 200 to be packaged carried by it into / out of the negative pressure cavity.
[0096] Optionally, the support member 40 can be movably connected to both the negative pressure assembly 20 and the main body 10 via components such as guide rails. That is, components such as guide rails used to constrain the movement path can be partially disposed in the negative pressure cavity of the negative pressure assembly 20 and partially disposed on the main body 10. The two parts extend in the same direction and are connected to each other, so that the support member 40 can move from the part of the guide rail disposed in the negative pressure cavity to the part of the guide rail disposed on the main body 10.
[0097] By enabling the support member 40 to move relative to the negative pressure assembly 20 along the first direction X, the battery encapsulation device 100 can be conveniently moved through the support member 40 to the position of the substrate 200 to be encapsulated, so as to align it with the first end cap 31 and the second end cap 32.
[0098] In some alternative embodiments, the encapsulation assembly 30 further includes a first support frame 50 and a second support frame 60 mounted on the main body 10, at least one of the first support frame 50 and the second support frame 60 being movably connected to the main body 10, and a first end cap 31 and a second end cap 32 being disposed on the side of the first support frame 50 and the second support frame 60 close to each other.
[0099] To facilitate the installation of the first end cap 31 and the second end cap 32, the encapsulation assembly 30 may also include a first support frame 50 and a second support frame 60. Both support frames are installed on the main body 10, and at least one of them may be movably connected to the main body 10 so that the relative position between the first end cap 31 and the second end cap 32 can be changed.
[0100] The support frame movably connected to the main body 10 can be selected using a combination of slide rails and sliders, or a combination of a protruding end and a linear bearing. The support frame whose relative position to the main body 10 remains unchanged can be selected using welding, fastener connection, or snap-fit connection, as long as the position of the corresponding end cap is stable. Optionally, in embodiments where both support frames are movably connected to the main body 10, the two support frames can be arranged symmetrically or centrally symmetrically in the direction of movement to facilitate the alignment of the first end cap 31 and the second end cap 32, and to make the applied force during pressing more uniform.
[0101] Optionally, the support frame can be a combination of rod-like and plate-like structures to ensure structural stability while facilitating the installation of the corresponding end caps. The first end cap 31, the second end cap 32, and their respective support frames can be connected using detachable methods such as fasteners, allowing for easy replacement based on the parameters of the substrate 200 to be encapsulated. The first end cap 31 and the second end cap 32 are respectively positioned on the side of the first support frame 50 and the second support frame 60 closest to each other, and are positioned correspondingly in the moving direction of the movable support, so that they can be aligned and pressed together when close together.
[0102] The end caps are supported and positioned by the first support frame 50 and the second support frame 60, and the relative position and spacing between the two end caps are changed by the relative movement of either support frame with the main body 10.
[0103] In some alternative embodiments, the first support frame 50 and the second support frame 60 are arranged along the second direction Y, and both the first support frame 50 and the second support frame 60 are movable relative to the main body 10 along the second direction Y.
[0104] Optionally, both the first support frame 50 and the second support frame 60 can be movably connected to the main body 10 to allow for more flexible adjustment of the positions of the first end cap 31 and the second end cap 32. The first support frame 50 and the second support frame 60 can be arranged along the second direction Y, which intersects with the first direction X, and can be perpendicular to each other.
[0105] The first support frame 50 and the second support frame 60 can be connected to the main body 10 by means of telescopic rods, slide rails, cylinders, threaded screws, etc., so that both can move relative to the main body 10 along the second direction Y. This allows the positions of the first end cap 31 and the second end cap 32 respectively installed on the two support frames to be flexibly adjusted in the second direction Y, so as to drive the two end caps to heat and pressurize the encapsulation film in the substrate 200 to be encapsulated from both sides, while making the magnitude of the pressing force easy to adjust.
[0106] Optionally, the first support frame 50 and the second support frame 60 can be movably connected to the main body 10 through the same connection method, such as a combination of guide rail and drive component, or a combination of linear bearing and drive component, etc. The drive component can be a hydraulic rod or cylinder, etc., so that the movement of the first support frame 50 and the second support frame 60 is more stable and controllable, thereby making the position of the first end cap 31 and the second end cap 32 more accurate.
[0107] The positions of the first end cap 31 and the second end cap 32 can be flexibly adjusted by the first support frame 50 and the second support frame 60 to adapt to battery substrates of different sizes and parameters, thereby expanding the applicability of the battery packaging device 100.
[0108] In some alternative embodiments, in the second direction Y, the first support frame 50 and the second support frame 60 are at least partially disposed on opposite sides of the negative pressure assembly 20, and the first end cap 31 and the second end cap 32 extend into the negative pressure chamber.
[0109] In the embodiment where a first support frame 50 and a second support frame 60 are provided, the two support frames can be at least partially provided on both sides of the negative pressure assembly 20, specifically, they can be provided on opposite sides of the negative pressure cavity in the second direction Y, so as to adjust the relative position of the end cap installed on the support frame with respect to the negative pressure cavity in that direction, thereby adjusting the relative position between the end cap and the substrate 200 to be packaged.
[0110] The first end cap 31 and the second end cap 32 extend into the negative pressure chamber from both sides. During encapsulation, their bonding interface is also located within the negative pressure chamber, and their positions can be adjusted according to the position of the substrate 200 to be encapsulated, ensuring that the three end caps are matched. This allows for rapid encapsulation after the substrate 200 is evacuated, further improving the reliability of the internal environment of the encapsulation film. When the substrate enters the negative pressure chamber, the first end cap 31 and the second end cap 32 can be moved away from each other to a preset position. Subsequently, after the substrate 200 is moved to the encapsulation position, they move towards each other and are pressed together.
[0111] By setting up a support frame, the relative positions of the first end cap 31, the second end cap 32 and the negative pressure chamber can be adjusted more flexibly, while reducing the possibility of interference between the end caps and the substrate 200 to be packaged in and out of the chamber.
[0112] In some alternative embodiments, in the first direction X, the dimensions of the first end cap 31 and the second end cap 32 are 5mm-10mm, and the protrusion 312 protrudes from the first pressing surface 311 by a smaller dimension than the dimension of the first end cap 31 in the first direction X.
[0113] Optionally, the dimensions of the first end cap 31 and the second end cap 32 in the first direction X can be the same or similar, and their specific dimensions can be selected from 5mm to 10mm, for example, any one of 5mm, 6mm, 7mm, 8mm, 9mm, 10mm or between any two of them.
[0114] Optionally, the size of the protrusion 312 protruding from the first pressing surface 311 and the size of the recess 322 relative to the second pressing surface 321 can be the same, and this size can be less than or equal to the extension size of the end cap where the protrusion 312 and the recess 322 are located in the first direction X. Specifically, it can be less than or equal to the size of the smaller of the first end cap 31 and the second end cap 32 in that direction.
[0115] By adjusting the width of the first end cap 31 and the second end cap 32, as well as the dimensions of the concave and convex structures, the encapsulation area formed by the interlocking and pressing of the first end cap 31 and the second end cap 32 can have a suitable width. At the same time, based on the use of the concave and convex structures to straighten the encapsulation film, the possibility of the encapsulation film being damaged due to the excessive protrusion of the convex part 312 can be reduced.
[0116] Secondly, embodiments of this application provide a battery processing apparatus, including the battery packaging device 100 in any embodiment of the first aspect.
[0117] The battery processing equipment provided in this application can be used to prepare solid-state batteries, but it should be understood that this application is not limited thereto. The battery processing equipment can also be used to process battery cells with electrolyte inside by adjusting the negative pressure parameters, etc.
[0118] The battery processing equipment has all the beneficial effects of the battery packaging device 100 in any of the embodiments of the first aspect. For details, please refer to the specific description of the battery packaging device 100 in the above embodiments. This embodiment will not repeat the description here.
[0119] This application provides a battery packaging device 100, including a main body 10, a negative pressure component 20, and a packaging component 30. The negative pressure component 20 is disposed on the main body 10 and includes a negative pressure cavity. The packaging component 30 includes a first end cap 31 and a second end cap 32. The side of the first end cap 31 facing the second end cap 32 has a first pressing surface 311 arranged along a first direction X and a protrusion 312 protruding from the first pressing surface 311. The side of the second end cap 32 facing the first end cap 31 has a second pressing surface 321 and a recess 322 recessed relative to the second pressing surface 321. The first pressing surface 311 is opposite to the second pressing surface 321, and the protrusion 312 is opposite to the recess 322.
[0120] The battery encapsulation device 100 further includes a support member 40 for supporting the battery substrate to be encapsulated. A first pressing surface 311 and a second pressing surface 321 are disposed near the support member 40. Both the first pressing surface 311 and the second pressing surface 321 are planar and extend parallel to the supporting surface 41 of the support member 40. The protrusion 312 and the recess 322 have a first surface 313 and a second surface 323 respectively on their respective sides. Both the first surface 313 and the second surface 323 include multiple arcuate segments arranged along a first direction X. These arcuate segments are connected and smoothly transitioned along the first direction X. The cross-sectional shape formed by each arcuate segment is circular.
[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A battery packaging device, It is characterized in that include: Main body; A negative pressure component is disposed on the main body, and the negative pressure component includes a negative pressure chamber; A packaging assembly is accommodated in the negative pressure chamber and includes a first head and a second head, wherein the first head has a first pressure surface and a convex portion protruding from the first pressure surface on the side facing the second head, and the second head has a second pressure surface and a concave portion recessed relative to the second pressure surface on the side facing the first head, wherein the first pressure surface is opposite to the second pressure surface, and the convex portion is opposite to the concave portion.
2. The battery packaging device according to claim 1, It is characterized in that The battery packaging device further comprises a supporting member, wherein the supporting member is used to support a battery matrix to be packaged; The first pressing surface and the second pressing surface are arranged on a side close to the supporting member, the first pressing surface and the second pressing surface are both planes, and the first pressing surface and the second pressing surface are both parallel to the supporting surface of the supporting member.
3. The battery packaging device according to claim 2, It is characterized in that The convex portion has a first surface on a side close to the concave portion, and the concave portion has a second surface on a side close to the convex portion. The convex portion and the first pressure surface are arranged along a first direction. The first surface and the second surface both include a plurality of arc surface segments arranged along the first direction. The plurality of arc surface segments are connected and smoothly transitioned in the first direction.
4. The battery packaging device according to claim 3, It is characterized in that In a cross section perpendicular to the extending direction of the first head, the cross-sectional figures formed by the plurality of arc surface segments are all in the shape of circular arcs.
5. The battery packaging device according to claim 4, It is characterized in that In the first direction, the central axes of two adjacent arc surface segments located at the convex part are respectively located at two opposite sides of the first surface, and the central axes of two adjacent arc surface segments located at the concave part are respectively located at two opposite sides of the second surface.
6. The battery packaging device according to claim 2, It is characterized in that The convex portion and the concave portion have a first surface and a second surface respectively on one side close to each other. The first surface and the second surface each include a plurality of arc surface segments and more than one plane segment. The plane segments and the arc surface segments are alternately arranged.
7. The battery packaging device according to claim 2, It is characterized in that The negative pressure assembly further includes a pressure plate disposed in the negative pressure chamber and opposite to the supporting member, wherein in a first direction, an orthographic projection of the pressure plate at least partially overlaps with an orthographic projection of the supporting member.
8. The battery packaging device according to claim 2, It is characterized in that The supporting member is movably connected to the negative pressure component or the main body, and the supporting member can move along a first direction relative to the negative pressure component to enter or leave the negative pressure chamber.
9. The battery packaging device according to claim 1, It is characterized in that The packaging assembly also includes a first support frame and a second support frame installed on the main body, at least one of the first support frame and the second support frame is movably connected to the main body, and the first head and the second head are arranged on the side of the first support frame and the second support frame close to each other.
10. The battery packaging device according to claim 9, It is characterized in that The first support frame and the second support frame are arranged along the second direction, and both the first support frame and the second support frame can move along the second direction relative to the main body.
11. The battery packaging device according to claim 10, It is characterized in that In the second direction, the first support frame and the second support frame are at least partially disposed on two opposite sides of the negative pressure assembly, and the first sealing head and the second sealing head extend into the negative pressure cavity.
12. The battery packaging device according to claim 1, It is characterized in that In the first direction, the sizes of the first head and the second head are 5mm-10mm, and the size of the convex portion protruding from the first pressure surface is smaller than the size of the first head in the first direction.
13. A battery processing device, It is characterized in that Comprising the battery packaging device as claimed in any one of claims 1 to 12.