Aluminum laminate film punching die and battery manufacturing apparatus

Abstract

The application relates to an aluminum-plastic film punching die and a battery manufacturing device. The aluminum-plastic film punching die comprises a female die plate and a male die mechanism. The female die plate is provided with a first recess which is recessed along a first direction. The male die mechanism comprises a fixing assembly and a male die plate assembly. The fixing assembly is capable of moving relative to the female die plate along the first direction to clamp or release a workpiece to be punched. The male die plate assembly is movably arranged in the fixing assembly along the first direction and is oppositely arranged with the first recess. The surface of the female die plate and the fixing assembly for clamping the workpiece is detachably provided with a convex rib punching part. The convex rib punching part is used for punching a convex rib protruding along the first direction on the workpiece. The convex rib is punched on the area of the aluminum-plastic film which is clamped and fixed by the convex rib punching part, so that the purpose of reducing the hemming degree of the aluminum-plastic film is achieved. By detachably arranging the convex rib punching part on the female die plate and the fixing assembly, the convex rib of various structures can be processed according to the processing requirements of the aluminum-plastic film, and the adaptability of the aluminum-plastic film punching die is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to aluminum-plastic film punching molds and battery manufacturing equipment. Background Technology

[0002] Aluminum-plastic film is a key packaging material for pouch lithium batteries. It is a heat-sealed composite of an outer nylon layer, a middle aluminum foil layer, and an inner polypropylene layer, with a total thickness typically only a few hundred micrometers. Before cell packaging, recesses to accommodate the cells need to be punched into the aluminum-plastic film using a punching process. As battery energy density requirements increase, the depth of the recesses continues to increase, placing higher demands on the molding quality.

[0003] Traditional punching dies often result in severe edge curling of the aluminum-plastic film after punching, leading to poor punching quality. Some punching dies can alleviate the curling problem by processing raised ribs on the edges of the aluminum-plastic film, but the types of raised ribs that can be processed are relatively limited and cannot meet the processing requirements of different aluminum-plastic films. Utility Model Content

[0004] In view of the above problems, this application provides an aluminum-plastic film punching mold and battery manufacturing equipment, which can alleviate the problem of easy edge curling after punching aluminum-plastic film, and can process ribs with various structures by changing the rib stamping part.

[0005] In a first aspect, this application provides an aluminum-plastic film punching mold, which includes:

[0006] A recessed template having a first groove recessed along a first direction;

[0007] A punch mechanism includes a fixed component and a punch plate assembly. The fixed component and the die plate are movable relative to each other in a first direction to clamp or release the workpiece to be punched. The punch plate assembly is movably inserted through the fixed component in the first direction and is disposed opposite to the first groove.

[0008] The concave template and the fixing component are respectively clamped on the surface of the workpiece and are detachably provided with a rib stamping part. The rib stamping part is used to stamp out a rib protruding along the first direction on the workpiece.

[0009] The aluminum-plastic film punching mold provided in this application embodiment clamps and fixes the edge of the aluminum-plastic film by moving the fixing component and the concave template relative to each other along a first direction. The convex template component is disposed opposite to the first groove, and by moving relative to each other along the first direction, it presses the aluminum-plastic film into the first groove to punch a recess in the aluminum-plastic film. By providing rib punching parts on the opposing surfaces of the concave template and the fixing component, ribs are punched into the area of ​​the aluminum-plastic film that is clamped and fixed. The ribs strengthen the structural strength of the non-recessed areas of the aluminum-plastic film, thereby reducing the degree of edge curling of the aluminum-plastic film. Moreover, by detachably configuring the rib punching parts on the concave template and the fixing component, ribs of various structures can be processed on the aluminum-plastic film according to the processing requirements of the aluminum-plastic film, improving the adaptability of the aluminum-plastic film punching mold.

[0010] In some other embodiments, the rib stamping portion includes a protrusion and a second groove. One of the die and the fixing component is provided with the second groove, and the other is provided with the protrusion. The protrusion can be engaged into the second groove along a first direction.

[0011] The aluminum-plastic film punching mold provided in this application provides a rib punching part that is adapted to a protrusion and a second groove. When the fixing component and the concave template gradually approach each other, the protrusion gradually punches the aluminum-plastic film into the second groove to process the rib groove on the aluminum-plastic film, thereby forming a rib on the side of the aluminum-plastic film away from the rib groove opening.

[0012] In some other embodiments, the fixing component and the concave template each have a clamping area around the first groove. The clamping area is used to contact the workpiece, and a rib stamping part is provided on the clamping area at a preset distance from its outermost edge.

[0013] The aluminum-plastic film punching mold provided in this application typically has a fixed component with an area opposite the concave template that is larger than the actual size of the aluminum-plastic film. During operation, the area actually in contact with the aluminum-plastic film is defined as the clamping area. The protruding rib punching part is disposed in this clamping area so that the protruding rib punching part can act on the aluminum-plastic film. By setting the protruding rib punching part at a predetermined distance from the outermost edge of the clamping area, the protruding rib is processed near the edge of the aluminum-plastic film, thereby achieving a better anti-rolling effect.

[0014] In some other embodiments, the clamping area is constructed as a polygon, with rib stampings provided on at least a portion of the sides of the polygon.

[0015] The aluminum-plastic film punching mold provided in this application embodiment, with the above-described configuration, can process spaced ribs on the aluminum-plastic film through the rib punching part provided on part of the side, thereby enhancing the structural strength of the aluminum-plastic film through these ribs.

[0016] In some other embodiments, at least one of the adjacent two sides of the polygon is provided with a rib stamping portion.

[0017] The aluminum-plastic film punching mold provided in this application embodiment, through the above-mentioned configuration, ensures that the corners formed by adjacent two sides are reinforced by at least one rib, thereby effectively alleviating the curling problem at each corner.

[0018] In some other embodiments, a raised rib is provided on one of the adjacent two sides of the polygon, and the raised rib extends to the other adjacent side.

[0019] The aluminum-plastic film punching mold provided in this application embodiment is configured such that the punched ribs are closer to the corners formed by the adjacent two sides, which makes it easier to prevent the corners from curling.

[0020] In some other embodiments, the concave template includes a concave template body and a concave mold block, the concave template body is provided with a first groove, and the concave mold block is detachably connected to the concave template body;

[0021] The fixing assembly includes a fixing assembly body and a punch block. The fixing assembly body is used to clamp the workpiece in conjunction with the concave template. The punch block is detachably connected to the fixing assembly body.

[0022] In this design, one of the punch block and the die block is provided with a second groove, and the other is provided with a protrusion.

[0023] The aluminum-plastic film punching mold provided in this application provides a rib punching part that is set on a detachable die block and a punch block. This allows for the replacement of the appropriate rib punching part by changing the die block and the punch block according to the processing requirements of the aluminum-plastic film to be processed.

[0024] In some other embodiments, the surface of the die cavity facing the punch cavity is flush with the die cavity body;

[0025] The surface of the punch block facing the die block is flush with the main body of the fixing component.

[0026] The aluminum-plastic film punching mold provided in this application embodiment is configured in such a way that the clamping surfaces of the concave template and the fixing components for the aluminum-plastic film are relatively flat.

[0027] In some other embodiments, the protrusion is smoothly connected to the clamping surface of the connected punch or die; and / or, the groove wall of the second groove is smoothly connected to the clamping surface of the connected punch or die.

[0028] The aluminum-plastic film punching mold provided in this application embodiment is configured such that when the protrusion presses the aluminum-plastic film into the second groove, the deformation of the aluminum-plastic film is smoother, which is more conducive to the plastic deformation of the aluminum-plastic film and less likely to be damaged.

[0029] In some other embodiments, the connection between the protrusion and the clamping surface of the punch or die is set as a first arc, the radius of the first arc being R1; 0.3mm≤R1≤2mm;

[0030] The connection between the groove wall of the second groove and the clamping surface of the punch or die is set as a second arc, and the radius of the second arc is R2; 0.3mm≤R2≤2mm.

[0031] The aluminum-plastic film punching mold provided in this application embodiment, through the above-mentioned settings of R1 and R2, can achieve a smoother connection between the groove wall of the protrusion and the second groove and the connected structure, thereby providing a better protective effect for the aluminum-plastic film.

[0032] In some other embodiments, a gap is provided between the protrusion and the groove wall of the second groove, the minimum value of the gap is L1, and the thickness of the workpiece is D; wherein, 0.6*D≤L1≤D.

[0033] If the L1 of the aluminum-plastic film punching mold provided in this application embodiment is too large, the aluminum-plastic film will not be able to form plastic deformation. If the L1 is too small, it will affect the material flow in the aluminum-plastic film and easily damage the aluminum-plastic film, especially the aluminum foil layer.

[0034] In some other embodiments, a gap L2 is provided between the protrusion and the groove wall of the second groove along the first direction, wherein L2 > D.

[0035] The aluminum-plastic film punching mold provided in this application embodiment, by setting L2 to be greater than the thickness value D of the aluminum-plastic film, can maintain a certain gap between the aluminum-plastic film and the bottom of the second groove. This gap can store the gas accumulated during the stamping process and make it easier for the protrusion to be demolded from the second groove.

[0036] Secondly, this application provides a battery manufacturing apparatus, which includes an aluminum-plastic film punching mold as described in any of the above embodiments.

[0037] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0038] 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:

[0039] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0040] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0041] Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application;

[0042] Figure 4 This is a schematic diagram of the structure of the aluminum-plastic film according to some embodiments of this application;

[0043] Figure 5 This is an exploded structural diagram of an aluminum-plastic film punching mold according to some embodiments of this application;

[0044] Figure 6 This is a schematic diagram of the assembly structure of an aluminum-plastic film punching mold according to some embodiments of this application;

[0045] Figure 7 This is a top view of the aluminum-plastic film punching mold according to some embodiments of this application;

[0046] Figure 8 for Figure 7 A cross-sectional view of a structure at point AA;

[0047] Figure 9 for Figure 8 Enlarged structural diagram at point E in the middle;

[0048] Figure 10 for Figure 7 A cross-sectional view of another structure at point AA;

[0049] Figure 11 for Figure 10 Enlarged structural diagram at point F;

[0050] Figure 12 This is a schematic diagram of the structure of the rib stamping part in some embodiments of this application.

[0051] The reference numerals in the detailed embodiments are as follows:

[0052] 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor;

[0053] 10. Box body; 11. First part; 12. Second part;

[0054] 20. Battery cell; 21. End cap; 21a. Electrode terminal; 22. Casing; 23. Cell; 23a. Tab;

[0055] 2000, Aluminum-plastic film punching mold;

[0056] 2100, concave template; 2110, concave template body; 2111, first groove; 2120, concave mold movable block;

[0057] 2200, Punch mechanism; 2210, Fixing component; 2211, Fixing component body; 22111, Mounting base plate; 22112, Pressure plate; 22113, Hanging plate; 2212, Punch movable block; 2220, Punch template assembly; 2221, Punch template; 2222, Punch connecting plate; 2223, Punch fixing plate; 2224, Floating female head; 2230, Second connecting guide post;

[0058] 2300, raised rib stamping part; 2310, protrusion; 2320, second groove;

[0059] 3000, First connecting guide post;

[0060] 4000, aluminum-plastic film; 4100, pit; 4200, raised rib groove. Detailed Implementation

[0061] 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.

[0062] 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.

[0063] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0064] 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.

[0065] 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.

[0066] 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).

[0067] 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.

[0068] 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.

[0069] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in other fields. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0070] Aluminum-cased batteries typically consist of multiple individual cells, each comprising a casing and the battery cell inside. During the production of a battery cell, an aluminum-plastic film is first formed into the shape of the battery casing, then the battery cell is placed inside the casing and electrolyte is injected. The aluminum-plastic film is generally stamped with recesses that match the shape of the battery cell using a stamping die.

[0071] The inventors of this application have noted that aluminum-plastic film is composed of an outer nylon layer, a middle aluminum foil layer, and an inner polypropylene layer, which are heat-sealed together. During stamping, the deformation between the layers is not uniform, and the total thickness of the aluminum-plastic film is relatively small, typically only a few hundred micrometers. These factors make it extremely easy for the edges of the aluminum-plastic film to curl after stamping, seriously affecting the processing quality of the aluminum-plastic film.

[0072] Based on the above considerations, in order to solve the problem of edge curling after stamping of aluminum-plastic film, the inventors, after in-depth research, designed an aluminum-plastic film punching mold, including a concave template and a convex mold mechanism. The concave template is provided with a first groove recessed along a first direction. The convex mold mechanism is configured to include a fixed component and a convex template component. The fixed component and the concave template can move relative to each other along the first direction to clamp or release the aluminum-plastic film to be stamped. By moving the convex template component along the first direction through the fixed component, the aluminum-plastic film can be stamped into the first groove, thereby processing a recess on the aluminum-plastic film. By providing a rib stamping part on the surface of the workpiece clamped by the concave template and the fixed component, ribs protruding along the first direction are stamped on the aluminum-plastic film. The ribs play a structural reinforcement role on the aluminum-plastic film, thereby alleviating the edge curling problem caused by the stamping of the aluminum-plastic film by the convex template component, and greatly reducing the degree of edge curling. Furthermore, by detachably setting the rib stamping part to the concave template and the fixing component, ribs of various structures can be processed on the aluminum-plastic film according to the processing requirements of the aluminum-plastic film, thereby improving the adaptability of the aluminum-plastic film punching mold.

[0073] The battery cells disclosed in the embodiments of this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. Specifically, electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0074] In some embodiments, the electrical device can be a vehicle. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle; a new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device is installed inside the vehicle, and the battery device can be located at the bottom, front, or rear of the vehicle. The battery device can be used to power the vehicle; for example, the battery device can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor, and the controller can be used to control the battery device to power the motor. For example, the battery device can be used to meet the vehicle's power needs during starting, navigation, and driving.

[0075] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0076] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. Taking the vehicle 1000 as an example, the vehicle 1000 can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0077] In some embodiments, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0078] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. In some embodiments, the battery device 100 includes a housing 10 and a battery cell 20, wherein the battery cell 20 is housed within the housing 10.

[0079] The housing 10 provides a space for housing the battery cell 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first part 11 and a second part 12, which overlap each other, and together define a space for housing the battery cell 20. The second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, with the first part 11 covering the open side of the second part 12 so that the first part 11 and the second part 12 together define the space; alternatively, the first part 11 and the second part 12 may both be hollow structures with one side open, with the open side of the first part 11 covering the open side of the second part 12. Of course, the housing 10 formed by the first part 11 and the second part 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0080] In the battery device 100, there can be multiple battery cells 20. These multiple battery cells 20 can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel. Multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0081] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of a battery cell 20 provided in some embodiments of this application. The battery cell 20 includes an end cap 21, a casing 22, a cell 23, and other functional components.

[0082] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure or impact, allowing battery cell 20 to have higher structural strength. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with battery cell 23 to output or input electrical energy to battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating element may also be provided on the inner side of the end cap 21 to reduce the risk of short circuit. For example, the insulating element may be made of plastic, rubber, etc.

[0083] The outer casing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the battery cell 23, electrolyte, and other components. The outer casing 22 and the end cap 21 can be independent components. An opening can be provided on the outer casing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the outer casing 22 can be integrated. Specifically, the end cap 21 and the outer casing 22 can form a common connecting surface before other components are inserted into the casing. When it is necessary to encapsulate the interior of the outer casing 22, the end cap 21 closes the outer casing 22. The outer casing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the outer casing 22 can be determined according to the specific shape and size of the battery cell 23. The material of the outer casing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0084] Cell 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more cells 23. Cell 23 is mainly formed by winding or stacking positive and negative electrode plates, and a separator is usually provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the cell assembly, while the portions of the positive and negative electrode plates without active material each constitute tabs 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device, the positive and negative active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals 21a to form a current loop.

[0085] See Figure 4 , Figure 4 This is a schematic diagram of the structure of the aluminum-plastic film 4000 according to some embodiments of this application. Two spaced-apart recesses 4100 are stamped into the aluminum-plastic film 4000. After the aluminum-plastic film 4000 is folded in half, the two recesses 4100 are aligned, forming a space to accommodate the battery cell 23. During the stamping process, raised rib grooves 4200 are stamped into the edge of the aluminum-plastic film 4000. Thus, a raised rib is formed on the side of the aluminum-plastic film 4000 away from the opening of the raised rib groove 4200. This raised rib serves to strengthen the structure and alleviate the problem of edge curling of the aluminum-plastic film 4000 when stamping the recesses 4100.

[0086] It should be noted that during the stamping process, the aluminum-plastic film 4000 is larger than the required size, and the edges of the aluminum-plastic film 4000 will be trimmed after stamping. The raised rib groove 4200 is set in the area that is subsequently trimmed and will not affect the final structure of the aluminum-plastic film 4000.

[0087] In some embodiments, the raised groove 4200 extends along the arrangement direction of the two recesses 4100, and a raised groove 4200 is provided on each of the two opposite sides of the aluminum-plastic film 4000. The curling is more severe at the four corners of the aluminum-plastic film 4000; by extending the raised groove 4200 to the corners, the anti-curling effect at the corners is improved.

[0088] See Figure 5 and Figure 6 , Figure 5 This is an exploded structural diagram of an aluminum-plastic film punching mold according to some embodiments of this application; Figure 6 This is a schematic diagram of the assembly structure of an aluminum-plastic film punching mold according to some embodiments of this application.

[0089] This application provides an aluminum-plastic film punching die 2000 for punching holes in workpieces such as the aluminum-plastic film 4000 described above. The aluminum-plastic film punching die 2000 includes a concave die 2100 and a convex die mechanism 2200. The concave die 2100 supports the aluminum-plastic film 4000. The convex die mechanism 2200 includes a fixing component 2210 and a convex die assembly 2220. The fixing component 2210 and the concave die 2100 are movable relative to each other along a first direction (Z direction in the figure) to clamp or release the workpiece to be punched (hereinafter referred to as the aluminum-plastic film 4000). The convex die assembly 2220 is movably inserted through the fixing component 2210 along the Z direction. The convex die assembly 2220 moves towards the concave die 2100 to cooperate with the concave die 2100 to punch out the hole 4100.

[0090] Combination Figures 7-9 As shown, Figure 7 This is a top view of the aluminum-plastic film punching mold according to some embodiments of this application; Figure 8 for Figure 7 A cross-sectional view of a structure at point AA; Figure 9 for Figure 8 Enlarged structural diagram at point E in the middle.

[0091] The concave template 2100 is provided with a first groove 2111 recessed along the Z direction. The convex template assembly 2220 is disposed opposite to the first groove 2111 and is used to press the aluminum-plastic film 4000 into the first groove 2111 to press a recess 4100 into the aluminum-plastic film 4000. The concave template 2100 and the fixing assembly 2210 are respectively machined to have a detachable rib stamping part 2300 on the surface of the aluminum-plastic film 4000. The rib stamping part 2300 is used to stamp a rib protruding along the Z direction into the aluminum-plastic film 4000.

[0092] The aluminum-plastic film punching mold provided in this application embodiment clamps and fixes the edge of the aluminum-plastic film 4000 by moving the fixing component 2210 and the concave template 2100 relative to each other in the Z direction. The convex template component 2220 is disposed opposite to the first groove 2111, and by moving relative to each other in the Z direction, the aluminum-plastic film 4000 is punched into the first groove 2111 to punch out the recess 4100 on the aluminum-plastic film 4000. By forming a raised rib punching part 2300 on the surface of the aluminum-plastic film 4000 through the relative processing of the concave template 2100 and the fixing component 2210, raised ribs are punched out on the area of ​​the aluminum-plastic film 4000 that is clamped and fixed. The raised ribs strengthen the structural strength of the non-recessed area of ​​the aluminum-plastic film 4000, thereby reducing the degree of edge curling of the aluminum-plastic film 4000. Furthermore, by detachably mounting the rib stamping part 2300 on the concave template 2100 and the fixing component 2210, ribs of various structures can be processed on the aluminum-plastic film 4000 according to the processing requirements of the aluminum-plastic film 4000, thereby improving the adaptability of the aluminum-plastic film punching mold.

[0093] In some embodiments, the aluminum-plastic film punching mold further includes a first connecting guide post 3000, one end of which is connected to the side of the concave template 2100 facing the convex mold mechanism 2200. The fixing component 2210 is slidably connected to the first connecting guide post 3000 along the Z direction. The first connecting guide post 3000 provides sliding guidance for the fixing component 2210, so that the fixing component 2210 can accurately press against the aluminum-plastic film 4000.

[0094] Optionally, four first connecting guide posts 3000 are provided, with the four first connecting guide posts 3000 spaced apart to provide a more stable and reliable guiding effect.

[0095] In some embodiments, the aluminum-plastic film punching mold further includes a first driving component (not shown in the figure), the driving end of which is connected to the fixed component 2210 and is used to drive the fixed component 2210 to reciprocate along the Z direction. The first driving component can be a motor screw module or a cylinder, etc., as long as it can drive the fixed component 2210 to move linearly. The specific structural form is not limited here.

[0096] In some embodiments, the fixing component 2210 includes a fixing component body 2211, which includes a mounting base 22111, a pressing plate 22112, and a hanging plate 22113. The mounting base 22111 is slidably connected to the first connecting guide post 3000. The pressing plate 22112 is disposed on the side of the mounting base 22111 facing the concave template 2100, and the projection of the pressing plate 22112 along the Z direction avoids the first groove 2111. The pressing plate 22112 cooperates with the concave template 2100 to clamp and fix the edge of the aluminum-plastic film 4000. The hanging plate 22113 is disposed on the side of the mounting base 22111 away from the pressing plate 22112 and is used to connect with the first driving member.

[0097] In some embodiments, the punch template assembly 2220 includes a punch template 2221, a punch connecting plate 2222, a punch fixing plate 2223, and a floating female head 2224. The punch fixing plate 2223 is movably disposed along the Z-direction on the side of the mounting base plate 22111 opposite to the pressure plate 22112. The punch template 2221 is connected to the punch fixing plate 2223 via the punch connecting plate 2222 and can move synchronously with the punch fixing plate 2223. The mounting base plate 22111 has a through hole extending along the Z-direction. The punch template 2221 and the punch connecting plate 2222 pass through the through hole, allowing the punch template 2221 to move into the first groove 2111 to press the aluminum-plastic film 4000.

[0098] The floating female head 2224 is located on the side of the punch fixing plate 2223 opposite to the punch connecting plate 2222, and is used to connect with the second driving component. The second driving component drives the punch plate 2221 to reciprocate along the Z direction through the floating female head 2224. The second driving component can be a motor screw module or a cylinder, etc., as long as it can drive the punch plate 2221 to move linearly. The specific structural form is not limited here.

[0099] Optionally, the punch mechanism 2200 further includes a second connecting guide post 2230, one end of which is connected to the mounting base plate 22111, and the punch fixing plate 2223 is slidably connected to the second connecting guide post 2230 along the Z direction.

[0100] Optionally, multiple second connecting guide posts 2230 are provided, with the multiple second connecting guide posts 2230 being spaced apart to provide a more stable and reliable guiding effect for the punch fixing plate 2223.

[0101] Please see Figure 8 and Figure 9In some embodiments, the rib stamping portion 2300 includes a protrusion 2310 and a second groove 2320. One of the concave template 2100 and the fixing component 2210 is provided with the second groove 2320, and the other is provided with the protrusion 2310. The protrusion 2310 can be inserted into the second groove 2320 along a first direction. By setting the rib stamping portion 2300 with a matching protrusion 2310 and a second groove 2320, as the fixing component 2210 and the concave template 2100 gradually approach each other, the protrusion 2310 gradually punches the aluminum-plastic film 4000 into the second groove 2320 to process the rib groove 4200 on the aluminum-plastic film 4000, thereby forming a rib on the side of the aluminum-plastic film 4000 away from the groove opening of the rib groove 4200.

[0102] In this embodiment, a protrusion 2310 is provided on the surface of the pressure plate 22112 facing the concave template 2100, and a second groove 2320 is provided on the concave template 2100. The stamped rib groove 4200 and the recessed pit 4100 have the same concave direction. When the second groove 2320 is processed by downward stamping, the edge of the aluminum-plastic film 4000 will tend to curl upward. By stamping the rib groove 4200 downward, it is easier to alleviate the curling problem of the aluminum-plastic film 4000.

[0103] In some embodiments, the fixing component 2210 and the concave template 2100 each have a clamping area surrounding the first groove 2111. The clamping area is used to contact the aluminum-plastic film 4000, and a raised rib stamping part 2300 is provided on the clamping area at a predetermined distance from its outermost edge. Typically, the area of ​​the fixing component 2210 and the concave template 2100 is larger than the actual size of the aluminum-plastic film 4000. During operation, the area that actually contacts the aluminum-plastic film 4000 is defined as the clamping area, and the raised rib stamping part 2300 is disposed in this clamping area so that the raised rib stamping part 2300 can act on the aluminum-plastic film 4000. By setting the raised rib stamping part 2300 at a predetermined distance from the outermost edge of the clamping area, a raised rib is processed near the edge of the aluminum-plastic film 4000, thereby achieving a better anti-rolling effect.

[0104] In some embodiments, the clamping area is constructed as a polygon, with raised rib stamping portions 2300 provided on at least a portion of the sides of the polygon. In this way, spaced ribs can be processed on the aluminum-plastic film 4000 by means of the raised rib stamping portions 2300 provided on a portion of the sides, thereby enhancing the structural strength of the aluminum-plastic film 4000.

[0105] In some embodiments, at least one of the adjacent two sides of the polygon is provided with a raised rib stamped portion 2300. This arrangement ensures that the corner formed by the adjacent two sides is structurally reinforced by at least one raised rib, thereby effectively alleviating the curling problem at each corner.

[0106] In some embodiments, a raised rib stamping portion 2300 is provided on one of the adjacent two sides of the polygon, and the raised rib stamping portion 2300 extends to the other adjacent side. By such an arrangement, the stamped rib can be made closer to the corner formed by the adjacent two sides, thereby making it easier to prevent the corners from curling.

[0107] In this embodiment, the aluminum-plastic film 4000 is rectangular, and the clamping area formed by the pressing plate 22112 and the concave template 2100 is also rectangular. Protruding rib stamping parts 2300 are respectively provided on the two opposite sides of the clamping area to stamp protruding ribs on the two opposite sides of the aluminum-plastic film 4000.

[0108] Please see Figures 10-11 , Figure 10 for Figure 7 A cross-sectional view of another structure at point AA; Figure 11 for Figure 10 Enlarged structural diagram at point F; Figure 12 This is a schematic diagram of the structure of the rib stamping portion 2300 in some embodiments of this application.

[0109] In some embodiments, the concave template 2100 includes a concave template body 2110 and a concave mold block 2120. The concave template body 2110 is provided with a first groove 2111, and the concave mold block 2120 is detachably connected to the concave template body 2110. The fixing component 2210 includes a fixing component body 2211 and a punch block 2212. The fixing component body 2211 is used to cooperate with the concave template 2100 to clamp the aluminum-plastic film 4000, and the punch block 2212 is detachably connected to the fixing component body 2211. One of the punch block 2212 and the concave mold block 2120 is provided with a second groove 2320, and the other is provided with a protrusion 2310. By setting the rib stamping part 2300 on the detachable die block 2120 and die block 2212, the appropriate rib stamping part 2300 can be replaced by changing the die block 2120 and die block 2212 according to the processing requirements of the aluminum-plastic film 4000 to be processed.

[0110] Optionally, the concave die 2120 is detachably connected to the concave die body 2110 by means of an insert, and the convex die 2212 is detachably connected to the pressure plate 22112 by means of an insert.

[0111] In this embodiment of the application, a second groove 2320 is provided on the concave die block 2120, and a protrusion 2310 is provided on the convex die block 2212.

[0112] In some embodiments, the surface of the concave die 2120 facing the convex die 2212 is flush with the concave die body 2110, and the surface of the convex die 2212 facing the concave die 2120 is flush with the pressure plate 22112. This arrangement ensures that the clamping surfaces of the concave die 2100 and the fixing assembly 2210 on the aluminum-plastic film 4000 are relatively flat.

[0113] In some embodiments, the protrusion 2310 is smoothly connected to the clamping surface of the connected punch block 2212 or die block 2120; and / or, the groove wall of the second groove 2320 is smoothly connected to the clamping surface of the connected punch block 2212 or die block 2120. With this arrangement, when the protrusion 2310 presses the aluminum-plastic film 4000 into the second groove 2320, the deformation of the aluminum-plastic film 4000 is smoother, which is more conducive to the plastic deformation of the aluminum-plastic film 4000 and makes it less susceptible to damage.

[0114] In some embodiments, the connection between the protrusion 2310 and the clamping surface of the punch block 2212 or the die block 2120 is set as a first arc, with a radius of R1, 0.3mm≤R1≤2mm. The connection between the groove wall of the second groove 2320 and the clamping surface of the punch block 2212 or the die block 2120 is set as a second arc, with a radius of R2, 0.3mm≤R2≤2mm. By setting R1 and R2 as described above, a smoother connection effect can be achieved between the groove wall of the protrusion 2310 and the second groove 2320 and the connected structure, thereby providing better protection for the aluminum-plastic film 4000.

[0115] Optionally, R1 and R2 can be set to 0.3mm, 0.8mm, 1.3mm, 1.8mm or 2mm respectively, or set to any value or any range of values ​​within the range of 0.3mm to 2mm.

[0116] In some embodiments, a gap is provided between the protrusion 2310 and the groove wall of the second groove 2320, with a minimum gap value of L1 and a thickness value of D for the aluminum-plastic film 4000; wherein 0.6*D≤L1≤D. If L1 is too large, the aluminum-plastic film 4000 will not be able to form plastic deformation; if L1 is too small, it will affect the material flow in the aluminum-plastic film 4000, easily damaging the aluminum-plastic film 4000, especially the aluminum foil layer.

[0117] Optionally, L1 can be set to 0.6*D, 0.7*D, 0.8*D, 0.9*D or D, etc.

[0118] In some embodiments, a gap L2 is provided between the protrusion 2310 and the groove wall of the second groove 2320 along the Z direction, wherein L2 > D. By setting L2 to be greater than the thickness value D of the aluminum-plastic film 4000, a certain gap can be maintained between the aluminum-plastic film 4000 and the bottom of the second groove 2320. This gap can store the gas accumulated during the stamping process and facilitate the demolding of the protrusion 2310 from the second groove 2320.

[0119] The aluminum-plastic film punching mold provided in this embodiment has the following punching action:

[0120] Control the punch mechanism 2200 to move upward, or drive the concave template 2100 to move downward, so that the pressure plate 22112 is separated from the concave template 2100 by a certain distance, and the punch 2221 moves upward to completely disengage from the first groove 2111.

[0121] The aluminum-plastic film 4000 is placed on the concave template 2100 and can be fixed by vacuum adsorption.

[0122] The driving concave template 2100 moves upward, causing the aluminum-plastic film 4000 to contact the pressing plate 22112, and the clamping force of the pressing plate 22112 and the concave template 2100 on the aluminum-plastic film 4000 reaches a preset value, generally set to 35000 kgf-10000 kgf. At this time, a raised rib groove 4200 and a raised rib will be machined on the edge of the aluminum-plastic film 4000.

[0123] The drive platen 2221 moves downward and presses the aluminum-plastic film 4000 into the first groove 2111. After reaching the set depth of the pit 4100, the pressure is held for a preset time (e.g., about 2 seconds).

[0124] Drive the concave template 2100 downward by a preset distance (e.g., 0.5mm), and then drive the convex template 2221 upward by a preset distance (e.g., 0.1mm); then simultaneously drive the concave template 2100 and the convex template 2221 to move in opposite directions to separate them to a safe position.

[0125] Remove the aluminum-plastic film 4000 from the concave template 2100 to complete the stamping process of one aluminum-plastic film 4000.

[0126] This application also provides a battery manufacturing apparatus, which includes an aluminum-plastic film punching mold 2000 as described in any of the above embodiments.

[0127] 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 punching mold for aluminum-plastic film, characterized in that, The aluminum-plastic film punching mold includes: A recessed template (2100) is provided with a first groove (2111) recessed along a first direction. The punch mechanism (2200) includes a fixing component (2210) and a punch plate assembly (2220). The fixing component (2210) and the concave plate (2100) are movable relative to each other along the first direction to clamp or release the workpiece to be punched. The punch plate assembly (2220) is movably inserted through the fixing component (2210) along the first direction and is disposed opposite to the first groove (2111). The concave template (2100) and the fixing component (2210) are respectively clamped on the surface of the workpiece and are detachably provided with a rib stamping part (2300). The rib stamping part (2300) is used to stamp out a rib protruding along the first direction on the workpiece.

2. The aluminum-plastic film punching mold according to claim 1, characterized in that, The rib stamping part (2300) includes a protrusion (2310) and a second groove (2320). One of the concave template (2100) and the fixing component (2210) is provided with the second groove (2320), and the other is provided with the protrusion (2310). The protrusion (2310) can be inserted into the second groove (2320) along the first direction.

3. The aluminum-plastic film punching mold according to claim 2, characterized in that, The fixing component (2210) and the concave template (2100) each have a clamping area around the first groove (2111). The clamping area is used to contact the workpiece. The rib stamping part (2300) is provided on the clamping area at a preset distance from its outermost edge.

4. The aluminum-plastic film punching mold according to claim 3, characterized in that, The clamping area is constructed as a polygon, and the rib stamping part (2300) is provided on at least a portion of the sides of the polygon.

5. The aluminum-plastic film punching mold according to claim 4, characterized in that, The rib stamping portion (2300) is provided on at least one of the adjacent two sides of the polygon.

6. The aluminum-plastic film punching mold according to claim 5, characterized in that, The rib stamping portion (2300) is provided on one of the adjacent two sides of the polygon, and the rib stamping portion (2300) extends to the other adjacent side.

7. The aluminum-plastic film punching mold according to any one of claims 2 to 6, characterized in that, The concave template (2100) includes a concave template body (2110) and a concave mold block (2120). The concave template body (2110) is provided with the first groove (2111), and the concave mold block (2120) is detachably connected to the concave template body (2110). The fixing component (2210) includes a fixing component body (2211) and a punch block (2212). The fixing component body (2211) is used to cooperate with the concave template (2100) to clamp the workpiece. The punch block (2212) is detachably connected to the fixing component body (2211). The second groove (2320) is provided on one of the punch block (2212) and the die block (2120), and the protrusion (2310) is provided on the other.

8. The aluminum-plastic film punching mold according to claim 7, characterized in that, The surface of the concave die block (2120) facing the convex die block (2212) is flush with the concave die body (2110); The surface of the punch block (2212) facing the die block (2120) is flush with the body of the fixing component (2211).

9. The aluminum-plastic film punching mold according to claim 7, characterized in that, The protrusion (2310) is smoothly connected to the clamping surface of the connected punch (2212) or die (2120); and / or The groove wall of the second groove (2320) is smoothly connected to the clamping surface of the connected punch block (2212) or the die block (2120).

10. The aluminum-plastic film punching mold according to claim 9, characterized in that, The connection between the protrusion (2310) and the clamping surface of the punch block (2212) or the die block (2120) is set as a first arc, and the radius of the first arc is R1; 0.3mm≤R1≤2mm; The connection between the groove wall of the second groove (2320) and the clamping surface of the punch block (2212) or the die block (2120) is set as a second arc, and the radius of the second arc is R2; 0.3mm≤R2≤2mm.

11. The aluminum-plastic film punching mold according to claim 7, characterized in that, A gap is provided between the protrusion (2310) and the groove wall of the second groove (2320), the minimum value of the gap is L1, and the thickness of the workpiece is D; wherein, 0.6*D≤L1≤D.

12. The aluminum-plastic film punching mold according to claim 11, characterized in that, Along the first direction, a gap L2 is provided between the protrusion (2310) and the groove wall of the second groove (2320), wherein L2 > D.

13. A battery manufacturing apparatus, characterized in that, Including the aluminum-plastic film punching mold as described in any one of claims 1 to 12.

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