Cutting device, cutting method and cutting equipment

Abstract

This application relates to a cutting device, cutting method, and cutting equipment, belonging to the field of battery manufacturing technology. The cutting device includes: a base; a pair of cutters mounted on the base; a driving mechanism for driving the pair of cutters to close or open relative to each other along a first direction; and an adjusting mechanism configured to drive at least a portion of the base to elastically deform in a second direction before or during the opening process of the pair of cutters driven by the driving mechanism, thereby creating a gap between the pair of cutters in the second direction, where the second direction is the direction of material movement and intersects with the first direction. This cutting device can reduce the risk of cutters rubbing against the material strip and improve the cutting quality of the material strip.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and more specifically, to a cutting device, a cutting method, and a cutting equipment. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In the battery manufacturing process, a cutting device is needed to cut the electrode sheets. However, during the cutting process, the cutter may scratch the material strip, resulting in poor quality of the cut electrode sheets. Summary of the Invention

[0004] The purpose of this application is to provide a cutting device, cutting method and cutting equipment that can reduce the risk of the cutter scraping the material strip and improve the cutting quality of the material strip.

[0005] This application is achieved through the following technical solution:

[0006] In a first aspect, this application provides a cutting device, comprising: a base; a pair of cutters mounted on the base; a driving mechanism for driving the pair of cutters to close or open relative to each other along a first direction; and an adjusting mechanism configured to drive at least a portion of the base to elastically deform in a second direction before or during the opening of the pair of cutters by the driving mechanism, so as to create a gap between the pair of cutters in the second direction, wherein the second direction is the direction of movement for cutting the material and intersects with the first direction.

[0007] According to the cutting device of this application embodiment, the driving base is elastically deformed in the second direction before or during the opening of the pair of cutters driven by the driving mechanism, thereby creating a gap between the pair of cutters in the second direction, reducing the risk of the pair of cutters contacting the material strip during the opening process, reducing the probability of the pair of cutters scraping the material strip, and improving the cutting quality of the material strip.

[0008] According to some embodiments of this application, the second direction is perpendicular to the first direction.

[0009] In the above scheme, the second direction is perpendicular to the first direction, and the cutting device has a simple structure, which is convenient for design and processing.

[0010] According to some embodiments of this application, the base includes a first base and a second base, at least a portion of the first base being movable relative to the second base along a second direction; the pair of cutters includes a first cutter and a second cutter; the first cutter is disposed on the first base, and the second cutter is disposed on the second base; the adjusting mechanism is configured to, before or during the opening of the pair of cutters driven by the driving mechanism, cause at least a portion of the first base to elastically deform relative to the second base along the second direction, and create the gap between the first cutter and the second cutter in the second direction.

[0011] In the above scheme, the first cutter is disposed on the first base body to achieve the positioning of the first cutter, and the second cutter is disposed on the second base body to achieve the positioning of the second cutter; by means of the adjustment mechanism, at least a part of the first base body is elastically deformed relative to the second base body in the second direction, so that the first cutter and the second cutter are separated by a gap in the second direction.

[0012] According to some embodiments of this application, the first seat includes a first part and a second part, the first part can elastically deform relative to the second part along the second direction, the second part is connected to the second seat, and the first cutter is disposed on the first part.

[0013] In the above scheme, since the first part can elastically deform relative to the second part along the second direction, when the first cutter connected to the first part elastically deforms, a gap is created between the first cutter and the second cutter in the second direction, which is convenient for adjustment.

[0014] According to some embodiments of this application, at least one gap that can elastically deform along the second direction is provided between the first part and the second part; the adjustment mechanism is configured to adjust the elastic deformation of the gap.

[0015] In the above scheme, the gap setting allows the first seat to undergo elastic deformation, thereby creating a gap between the pair of cutters in the second direction.

[0016] According to some embodiments of this application, the gap extends generally along a third direction, which is perpendicular to the second direction and the first direction.

[0017] In the above scheme, the gap extends generally along the third direction so that the first seat can generate elastic deformation in the second direction.

[0018] According to some embodiments of this application, the first seat includes at least two first portions arranged along a third direction, which is perpendicular to the second direction and the first direction.

[0019] In the above scheme, the first part is arranged along the third direction so that the first seat can undergo elastic deformation, making it easy for a pair of cutters to create a gap in the second direction.

[0020] According to some embodiments of this application, the pair of cutters includes a first cutter and a second cutter, the first cutter being movably connected to the first portion along the first direction, and the second cutter being fixed to the second base.

[0021] In the above scheme, the first cutter can move relative to the first part along the first direction, and the second cutter is fixed to the second base to ensure stable cooperation between the first cutter and the second cutter.

[0022] According to some embodiments of this application, the first part is provided with a guide hole, and the cutting device further includes: a guide rod extending along the first direction and slidably passing through the guide hole; wherein, the first cutter is fixed to the guide rod.

[0023] In the above scheme, the first cutter is connected by a guide rod passing through the guide hole, so that the first cutter can move relative to the base in the first direction, which facilitates the first cutter and the second cutter to close or open with each other, and ensures the stability of the movement of the first cutter.

[0024] According to some embodiments of this application, the gap includes interconnected straight segments and arc segments, the straight segments extending along the third direction, the straight segments and the arc segments being alternately arranged along the third direction, and the center of the guide hole coinciding with the center of the arc segment.

[0025] In the above scheme, the arc segment is used to avoid the guide hole, so that the guide rod and the base fit tightly and the size of the base in the second direction is reduced.

[0026] According to some embodiments of this application, the extension of the straight line segment passes through the center of the guide hole.

[0027] In the above scheme, the extension of the straight segment passes through the center of the guide hole, making the fit between the guide rod and the base more compact.

[0028] According to some embodiments of this application, the first part is provided with a weakening portion.

[0029] In the above scheme, the weakening part can reduce the difficulty of the base to undergo elastic deformation.

[0030] According to some embodiments of this application, the weakened portion includes a plurality of through holes, each of the through holes extending along the third direction, and the plurality of through holes being arranged along the second direction.

[0031] In the above scheme, the arrangement of multiple through holes can weaken the base in the second direction, thereby reducing the difficulty of the base to generate elastic deformation along the second direction.

[0032] According to some embodiments of this application, the adjustment mechanism is installed between the first part and the second part.

[0033] In the above scheme, the position of the adjustment mechanism facilitates the elastic deformation of the first part relative to the second part, and the adjustment is simple.

[0034] According to some embodiments of this application, the adjustment mechanism includes a piezoelectric ceramic actuator.

[0035] In the above scheme, the piezoelectric ceramic actuator has a compact structure and small size.

[0036] Secondly, this application provides a cutting method, comprising: driving a pair of cutters to close together along a first direction to cut a strip of material; causing the pair of cutters to create a gap in a second direction, the second direction being the direction of movement for cutting the material and intersecting with the first direction; and driving the pair of cutters to open along the first direction.

[0037] Thirdly, this application provides a cutting device, which includes: a conveying device for conveying electrode sheets; and the cutting device provided in any of the above embodiments for cutting the electrode sheets.

[0038] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 Axonometric view of a cutting device provided in some embodiments of this application;

[0041] Figure 2 This is a schematic diagram of the structure of the cutting device provided in some embodiments of this application;

[0042] Figure 3 A schematic diagram of the structure of the gap in the base provided in some embodiments of this application;

[0043] Figure 4 for Figure 3A cross-sectional view along the AA direction;

[0044] Figure 5 for Figure 3 A cross-sectional view along the BB direction;

[0045] Figure 6 A schematic flowchart illustrating the cutting method provided in some embodiments of this application;

[0046] Figure 7 A schematic block diagram of a cutting device provided for some embodiments of this application.

[0047] Icons: 100-Cutting device; 10-Base; 11-Gap; 111-Straight segment; 112-Curved segment; 12-Guide hole; 13-Weakened part; 131-Through hole; 14-First seat; 141-First part; 142-Second part; 15-Second seat; 16-Receiving cavity; 17-Hollowed part; 20-A pair of cutters; 21-First cutter; 22-Second cutter; 30-Drive mechanism; 31-Drive connector; 40-Adjusting mechanism; 50-Guide rod; 60-Connecting plate; 71-First stop; 72-Second stop; 900-Conveying device; 1000-Cutting equipment. Detailed Implementation

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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 three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0053] 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), unless otherwise explicitly specified.

[0054] 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.

[0055] 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.

[0056] In this application, the term "battery" refers to a single physical module comprising one or more individual battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack.

[0057] In this application, the term "battery" refers to a single physical module comprising one or more individual battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack.

[0058] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated current collector protrudes beyond the coated current collector, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated current collector protrudes beyond the coated current collector, serving as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, etc. To ensure that the circuit does not melt when carrying a large current, multiple positive electrode tabs and multiple negative electrode tabs are stacked together. The separator can be made of PP (polypropylene) or PE (polyethylene), etc.

[0059] During the electrode production process, the electrodes are typically wound into rolls for movement between processes. Because the electrode strips are relatively long, they need to be cut during battery manufacturing to obtain the required electrode lengths.

[0060] In related technologies, a cutting device is typically used to cut the strip material. This device includes a pair of cutters that close together to cut the strip. The inventors discovered that after cutting, the cutters open, and during this opening process, the strip material moves with the cutters, causing them to easily scrape against the strip, thus damaging it and resulting in poor cutting quality. For example, taking the strip material as an electrode sheet, when cutting the electrode sheet, the cutters scraping against it can easily remove the active material layer, reducing the active material capacity. In severe cases, it can cause deep scratches on the electrode surface, affecting its strength and leading to breakage during subsequent processing, thus impacting the electrode's performance.

[0061] In view of this, to solve the problem of poor cutting quality of the material strip, the inventors, after in-depth research, designed a cutting device. This device includes a base, a pair of cutters, a drive mechanism, and an adjustment mechanism. The drive mechanism drives the pair of cutters to close or open relative to each other along a first direction. The adjustment mechanism is configured to cause the drive base to elastically deform in a second direction before or during the opening process of the pair of cutters, thereby increasing the movement gap between the cutters. The second direction intersects with the first direction. By driving the base to elastically deform in the second direction through the adjustment mechanism, the movement gap between the cutters is increased, reducing the risk of the cutters contacting the material strip during the opening process, thus improving the cutting quality of the material strip.

[0062] When this cutting device is used to cut the strip, the drive base undergoes elastic deformation in the second direction before or during the opening process of the pair of cutters driven by the drive mechanism. This increases the movement gap between the pair of cutters, reduces the risk of the pair of cutters contacting the strip during the opening process, reduces the probability of the pair of cutters scraping the strip, and improves the cutting quality of the strip.

[0063] Please see Figures 1 to 5 , Figure 1 This is an isometric view of a cutting device provided in some embodiments of this application. Figure 2 This is a schematic diagram of the structure of the cutting device provided in some embodiments of this application. Figure 3 This is a schematic diagram of the structure of the gap in the base provided in some embodiments of this application. Figure 4 for Figure 3 A cross-sectional view along the AA direction. Figure 5 for Figure 3 A cross-sectional view along the BB direction.

[0064] According to some embodiments of this application, such as Figures 1 to 5 This application provides a cutting device 100. The cutting device 100 includes a base 10, a pair of cutters 20, a drive mechanism 30, and an adjustment mechanism 40. The drive mechanism 30 is used to drive the pair of cutters 20 to close or open with each other along a first direction Z; the adjustment mechanism 40 is configured to drive at least a portion of the base 10 to elastically deform in a second direction X before or during the opening of the pair of cutters 20 by the drive mechanism 30, so that a gap is created between the pair of cutters 20 in the second direction X; the second direction X is the direction of movement for cutting the material and intersects with the first direction Z.

[0065] In the diagram, the direction indicated by the letter Z is the first direction, and the direction indicated by the letter X is the second direction. The second direction X refers to the direction of movement of the material being cut, meaning that the material moves along the second direction X.

[0066] When a pair of cutters 20 closes to each other along the first direction Z, it means that the pair of cutters 20 approach each other in the first direction Z, thereby cutting the material located between the pair of cutters 20; when a pair of cutters 20 opens along the first direction Z, it means that the blades of the pair of cutters 20 move away from each other in the first direction Z to reset, ready for the next cutting of the material strip.

[0067] There are various implementations of the pair of cutters 20 closing or opening with each other along the first direction Z. For example, one of the pair of cutters 20 moves closer to or further away from the other along the first direction Z, or the pair of cutters 20 move simultaneously in opposite directions.

[0068] In order to cut the strip, there is no gap between the pair of cutters 20 in the second direction; the adjusting mechanism 40 drives the base 10 to produce elastic deformation, so that the pair of cutters 20 produce a gap in the second direction.

[0069] The gap between a pair of cutters 20 in the second direction refers to the distance between the close-to-each surfaces of the pair of cutters 20 in the second direction X.

[0070] The thickness direction of a pair of cutters 20 can be set parallel to the second direction X, or it can be set at an angle to the second direction X.

[0071] The conveying direction of the material belt can be set parallel to the second direction X, and the cutting device 100 cuts the material belt along the width direction of the material belt; or, the conveying direction of the material belt can be set inclined to the second direction X, and the cutting device 100 cuts the material belt along the direction inclined to the width direction of the material belt.

[0072] The second direction X intersects the first direction Z. The second direction X can be perpendicular to the first direction Z, or the second direction X can be tilted to the first direction Z.

[0073] A pair of cutters 20 can be either ordinary cutters or ultrasonic cutters.

[0074] The drive mechanism 30 and the adjustment mechanism 40 can be electrically controlled to achieve automated cutting operations.

[0075] In some embodiments of this application, the material strip can be an electrode sheet, which is a component used to form an electrode assembly for a battery cell. In other embodiments, the material strip can also be a composite material strip formed by laminating an electrode sheet and a separator, or other forms of composite material strips that require high surface quality.

[0076] Elastic deformation is the phenomenon where a material deforms under the action of an external force, and the deformation completely disappears when the external force is removed.

[0077] The elastic deformation of the base 10 in the second direction X means that, under the action of the adjusting mechanism 40, at least a local area of ​​the base 10 undergoes elastic deformation in the second direction X, resulting in a small change in the position of the components in that local area. The elastic deformation of the base 10 is recoverable; when the force exerted by the adjusting mechanism 40 on the base 10 disappears, the base 10 returns to its original shape. It should be noted that when the adjusting mechanism 40 drives the base 10 to undergo elastic deformation in the second direction X, the elastic deformation can occur in a partial area of ​​the base 10 or the entire base 10, causing a gap to be created between the pair of cutters 20 in the second direction.

[0078] The gap between the pair of cutters 20 in the second direction can be caused by both cutters 20 changing position under the elastic deformation of the base 10, or by one of the cutters 20 changing position under the elastic deformation of the base 10 while the other remains stationary.

[0079] According to the embodiments of this application, the cutting device 100, through the adjustment mechanism 40, before or during the opening of the pair of cutters 20 driven by the drive mechanism 30, causes the drive base 10 to undergo elastic deformation in the second direction X, thereby creating a gap between the pair of cutters 20 in the second direction, reducing the risk of the pair of cutters 20 contacting the material strip during the opening process, reducing the probability of the pair of cutters 20 scraping the material strip, and improving the cutting quality of the material strip.

[0080] According to some embodiments of this application, the second direction X is perpendicular to the first direction Z.

[0081] The first direction Z can be vertical, horizontal, or other directions. For example, if the first direction Z is vertical and the second direction X is horizontal, the material belt is conveyed horizontally and the thickness direction of the material belt extends vertically; or if the first direction Z is horizontal and the second direction X is vertical, the material belt is conveyed vertically and the thickness direction of the material belt extends horizontally.

[0082] The second direction X is perpendicular to the first direction Z. In other words, the closing or opening direction of the pair of cutters 20 is set perpendicular to the direction of adjustment of the movement gap of the pair of cutters 20. Compared with the way the second direction X is tilted to the first direction Z, the second direction X is perpendicular to the first direction Z, which makes the cutting device 100 simpler in structure and easier to design and process.

[0083] According to some embodiments of this application, the base 10 includes a first base 14 and a second base 15, at least a portion of the first base 14 being movable relative to the second base 15 along a second direction X; a pair of cutters 20 includes a first cutter 21 and a second cutter 22; the first cutter 21 is disposed on the first base 14, and the second cutter 22 is disposed on the second base 15; the adjusting mechanism 40 is configured to, before or during the opening of the pair of cutters 20 driven by the driving mechanism 30, cause at least a portion of the first base 14 to elastically deform relative to the second base 15 along the second direction X, and create a gap between the first cutter 21 and the second cutter 22 in the second direction X.

[0084] The first base 14 and the second base 15 can be connected as one piece, or the first base 14 and the second base 15 can be integrally formed.

[0085] It should be noted that at least a portion of the first seat 14 is capable of moving relative to the second seat 15 along a second direction, so that at least a portion of the first seat 14 is capable of elastic deformation relative to the second seat 15 along the second direction X; a portion of the first seat 14 is capable of elastic deformation relative to the second seat 15 along the second direction X, or the entire first seat 14 is capable of elastic deformation relative to the second seat 15 along the second direction X.

[0086] The first cutter 21 is disposed on the first base 14 to position the first cutter 21, and the second cutter 22 is disposed on the second base 15 to position the second cutter 22; the adjustment mechanism 40 causes at least a portion of the first base 14 to elastically deform relative to the second base 15 along the second direction X, so that the first cutter 21 and the second cutter 22 create a gap in the second direction X.

[0087] According to some embodiments of this application, the first base 14 includes a first part 141 and a second part 142. The first part 141 can elastically deform relative to the second part 142 along a second direction X. The second part 142 is connected to the second base 15. The first cutter 21 is disposed on the first part 141.

[0088] The first part 141 can elastically deform relative to the second part 142 along the second direction X, and the second part 142 is connected to the second seat 15. It can be understood that the first part 141 is the part of the first seat 14 that can elastically deform, that is, the first part 141 is more likely to elastically deform relative to the second part 142.

[0089] Since the first part 141 can elastically deform relative to the second part 142 along the second direction X, when the first cutter 21 connected to the first part 141 elastically deforms, the first cutter 21 and the second cutter 22 will create a gap in the second direction X, which is convenient for adjustment.

[0090] According to some embodiments of this application, at least one gap 11 that can elastically deform along a second direction is provided between the first part 141 and the second part 142; the adjustment mechanism 40 is configured to adjust the elastic deformation of the gap 11.

[0091] The gap 11 is a slot opened on the first base 14. When the first part 141 undergoes elastic deformation relative to the second part 142, it can be understood that the size of the gap 11 changes. The gap 11 becomes larger, causing the first cutter 21 and the second cutter 22 to create a gap in the second direction X. Optionally, the gap 11 penetrates the first base 14 along the first direction Z, so that the first base 14 can easily undergo elastic deformation.

[0092] The slit 11 allows the first seat 14 to undergo elastic deformation, thereby creating a gap between the pair of cutters 20 in the second direction X.

[0093] According to some embodiments of this application, such as Figure 1 and Figure 3 As shown, the gap 11 extends generally along the third direction Y, which is perpendicular to the second direction X and the first direction Z.

[0094] In the diagram, the direction indicated by the letter Y is the third direction, which is perpendicular to the second direction X and the first direction Z.

[0095] The length direction of a pair of cutters 20 can extend along the third direction Y.

[0096] The slit 11 generally extends along the third direction Y, meaning that the slit 11 extends substantially along the third direction Y; in other words, the length direction of the slit 11 is the third direction Y. Optionally, the line connecting the two endpoints of the slit 11 can be parallel to the third direction Y. For example, when the slit 11 has a straight structure, the slit 11 extends along the third direction Y; or, for another example, most of the area of ​​the slit 11 extends along the third direction Y, while some areas extend along a direction intersecting the third direction Y.

[0097] Since the gap 11 extends generally along the third direction Y, which is perpendicular to the second direction X, the width direction of the gap 11 is the second direction X, so that the base 10 can generate elastic deformation in the second direction X.

[0098] According to some embodiments of this application, the first base 14 includes at least two first portions 141, which are arranged along a third direction Y, and the third direction Y is perpendicular to the second direction X and the first direction Z.

[0099] The first part 141 is arranged along the third direction Y, which means that multiple first parts 141 are set at intervals along the third direction Y, and multiple first parts 141 are arranged sequentially along the third direction Y.

[0100] The first part 141 is arranged along the third direction Y so that the first seat 14 can undergo elastic deformation, making it easy for a pair of cutters 20 to create a gap in the second direction X.

[0101] According to some embodiments of this application, such as Figure 1 , Figure 2 and Figure 4 As shown, a pair of cutters 20 includes a first cutter 21 and a second cutter 22. The first cutter 21 is movably connected to the first part 141 along the first direction Z, and the second cutter 22 is fixed to the second base 15.

[0102] The first cutting blade 21 is movably connected to the first portion 141 along the first direction Z, so that the first cutting blade 21 can move relative to the first portion 141 along the first direction Z. When the first cutting blade 21 moves along the first direction Z, the first cutting blade 21 and the second cutting blade 22 can be mutually closed or opened.

[0103] The first cutting blade 21 can move relative to the first part 141 along the first direction Z, and the second cutting blade 22 is fixed to the second base 15 to ensure stable cooperation between the first cutting blade 21 and the second cutting blade 22.

[0104] According to some embodiments of this application, such as Figure 2 and Figure 5 As shown, the first part 141 is provided with a guide hole 12, and the cutting device 100 also includes a guide rod 50, which extends along the first direction Z and is slidably inserted through the guide hole 12; wherein, the first cutter 21 is fixed to the guide rod 50.

[0105] The guide hole 12 is a hole extending along the first direction Z on the first part 141. Optionally, the guide hole 12 can be a through hole, or it can be a blind hole. To ensure a stable fit between the guide rod 50 and the guide hole 12, the guide hole 12 can be a through hole, with both ends of the guide rod 50 exposed at both ends of the guide hole 12.

[0106] The guide rod 50 is a rod-shaped structure used to cooperate with the guide hole 12 to guide the movement of the first cutter 21 relative to the base 10, so as to ensure that the first cutter 21 moves along the first direction Z.

[0107] The first cutter 21 is connected by a guide rod 50 passing through the guide hole 12 to ensure that the first cutter 21 can move relative to the base 10 in the first direction Z, so as to facilitate the first cutter 21 and the second cutter 22 to close or open with each other, and to ensure the stable movement of the first cutter 21.

[0108] According to some embodiments of this application, such as Figure 1 and Figure 3 As shown, the guide hole 12 is located on one side of the gap 11.

[0109] The guide hole 12 is located on one side of the gap 11, meaning that the guide hole 12 is located on one side of the gap 11 along the second direction X. The guide hole 12 is the mating position of the guide rod 50 and the first part 141, that is, the mating position of the first cutter 21 and the first part 141. When the base 10 undergoes elastic deformation and the size of the gap 11 changes, the position of the guide hole 12 changes, causing the position of the first cutter 21 to change, thereby creating a gap between the first cutter 21 and the second cutter 22 in the second direction X.

[0110] The guide hole 12 is located on one side of the gap 11 so that the position of the guide rod 50 changes when the size of the gap 11 changes, thereby creating a gap between the first cutter 21 and the second cutter 22 in the second direction X.

[0111] According to some embodiments of this application, such as Figure 1 and Figure 3 As shown, the gap 11 includes a straight segment 111 and an arc segment 112 connected to each other. The straight segment 111 extends along the third direction Y. The straight segment 111 and the arc segment 112 are alternately arranged along the third direction Y. The center of the guide hole 12 coincides with the center of the arc segment 112.

[0112] The alternating arrangement of straight line segment 111 and arc segment 112 along the third direction Y means that there are multiple straight line segments 111 and arc segments 112. Two adjacent straight line segments 111 are connected by arc segments 112, and two adjacent arc segments 112 are connected by straight line segments 111.

[0113] like Figure 1 and Figure 3 As shown, the first base 14 is provided with multiple guide holes 12, which are spaced apart along the third direction Y. Correspondingly, multiple guide rods 50 are provided, each guide rod 50 corresponding to one of the multiple guide holes 12, and each guide rod 50 is inserted into the corresponding guide hole 12. Each guide hole 12 corresponds to an arc segment 112. In this embodiment, the first cutter 21 and the first base 14 have multiple connection positions in the third direction Y. Since the length direction of the first cutter 21 is the third direction Y, the first cutter 21 and the base 10 have multiple connection positions in the third direction Y, ensuring that the first cutter 21 moves smoothly relative to the base 10.

[0114] The center of the arc segment 112 coincides with the center of the guide hole 12, and the arc segment 112 arches toward the side of the gap 11 away from the guide hole 12; the arc segment 112 is used to avoid the guide hole 12 so that the guide rod 50 and the base 10 fit tightly and reduce the size of the base 10 in the second direction X.

[0115] According to some embodiments of this application, the extension of the straight line segment 111 passes through the center of the guide hole 12.

[0116] The extension of the straight segment 111 passes through the center of the guide hole 12; in other words, the arc segment 112 has a semi-circular structure.

[0117] In the above scheme, the extension line of the straight segment 111 passes through the center of the guide hole 12, making the fit between the guide rod 50 and the base 10 more compact.

[0118] According to some embodiments of this application, the first part 141 is provided with a weakening portion 13. For example... Figure 1 and Figure 3 As shown, the weakened part 13 and the guide hole 12 are located on the same side of the gap 11.

[0119] The weakening part 13 is a region on the first part 141 used to reduce the elastic deformation of the base 10. For example, the weakening part 13 can be a through hole, gap or other structure on the base 10.

[0120] By setting the weakening part 13, the difficulty of the base 10 to generate elastic deformation is reduced, making it easier for local areas of the base 10 to generate elastic deformation.

[0121] According to some embodiments of this application, such as Figure 1 and Figure 3 As shown, the first part 141 is provided with a plurality of weakening parts 13, which are spaced apart along the third direction Y.

[0122] The arrangement of multiple weakening parts 13 can weaken the base 10 at multiple locations in the third direction Y, thereby reducing the difficulty of the base 10 generating elastic deformation.

[0123] According to some embodiments of this application, such as Figure 1 and Figure 2 As shown, the weakening part 13 includes a plurality of through holes 131, each through hole 131 extending along a third direction Y, and the plurality of through holes 131 arranged along a second direction X.

[0124] Each through hole 131 extends along the third direction Y, such that the extension direction of the through hole 131 is parallel to the extension direction of the slot 11, so that the base 10 can easily undergo elastic deformation.

[0125] In the above scheme, the arrangement of multiple through holes 131 can weaken the base 10 in the second direction X, thereby reducing the difficulty for the base 10 to generate elastic deformation along the second direction X.

[0126] According to some embodiments of this application, such as Figure 2 and Figure 5 As shown, the second cutter 22 is fixed to both ends of the base 10 along the third direction Y.

[0127] In the above scheme, the second cutter 22 is fixed to both ends of the base 10 along the third direction Y, so as to facilitate the installation of other components in the area between the two ends of the base 10 and make reasonable use of the installation space.

[0128] like Figure 2 and Figure 5 As shown, the base 10 includes a first base 14 and two second bases 15. The two second bases 15 are connected to the two ends of the first base 14 along the third direction Y. The second cutter 22 is fixed to the two second bases 15, and the first cutter 21 is connected to the first base 14. The slit 11 penetrates the first base 14 along the first direction Z. The first base 14, the two second bases 15, and the second cutter 22 form an accommodating space. The cutting device 100 also includes a connecting plate 60, which is disposed within the accommodating space. A guide rod 50 is inserted into the first base 14, and one end of the guide rod 50 is connected to the connecting plate 60. The first cutter 21 is connected to the connecting plate 60, making the cutting device 100 compact and facilitating the assembly of the first cutter 21 and the base 10.

[0129] According to some embodiments of this application, the adjustment mechanism 40 is installed between the first part 141 and the second part 142.

[0130] The adjustment mechanism 40 is installed between the first part 141 and the second part 142 to facilitate positioning and support of the adjustment mechanism 40.

[0131] The adjustment mechanism 40 is configured to adjust the size of the gap 11. Adjusting the size of the gap 11 by adjusting the adjustment mechanism 40 facilitates the driving of the first part 141 to produce elastic deformation relative to the second part 142 in the second direction X, so that the pair of cutters 20 create a gap in the second direction X. The adjustment is simple.

[0132] According to some embodiments of this application, such as Figure 4 As shown, the base 10 has a receiving cavity 16 communicating with the gap 11, and the adjustment mechanism 40 is disposed in the receiving cavity 16.

[0133] In the above scheme, the adjustment mechanism 40 is set inside the receiving cavity 16, which facilitates the protection of the adjustment mechanism 40. At the same time, the cutting device 100 has a compact structure, reducing space occupation.

[0134] like Figure 4 As shown, the receiving cavity 16 extends along the second direction X, with both ends of the receiving cavity 16 located on both sides of the gap 11. The two ends of the adjusting mechanism 40 along the second direction X are respectively connected to the base 10 to facilitate adjustment of the size of the gap 11. Optionally, the receiving cavity 16 has an open structure at both ends to facilitate placement of the adjusting mechanism 40 within the receiving cavity 16. A first stop 71 is provided at one end of the receiving cavity 16, located between the adjusting mechanism 40 and the base 10. A second stop 72 is provided at the other end of the receiving cavity 16, and the second stop 72 is detachably connected to the base 10. For example, the second stop 72 can be threaded to the base 10, or the second stop 72 can be snapped into the base 10 to prevent the adjusting mechanism 40 from disengaging from the receiving cavity 16.

[0135] According to some embodiments of this application, the regulating mechanism 40 includes a piezoelectric ceramic actuator.

[0136] Piezoelectric ceramic actuators have the advantages of high precision and short response time, and are also compact in structure and small in size.

[0137] Piezoelectric ceramics utilize their material properties to undergo mechanical deformation under voltage and to polarize due to the relative displacement of internal positive and negative charge centers under mechanical stress, thus exhibiting the piezoelectric effect. When energized, piezoelectric ceramics can elongate in the direction of the two electrodes (i.e., the second direction X) and shrink back to their original size when de-energized.

[0138] When the piezoelectric ceramic actuator is energized, the piezoelectric ceramic deforms and elongates along the second direction X, driving the base 10 to undergo elastic deformation, thus increasing the width of the gap 11. When the piezoelectric ceramic actuator is de-energized, the piezoelectric ceramic deforms and retracts along the second direction X, and the base 10 returns to its initial state under the action of its own material properties.

[0139] Alternatively, the piezoelectric ceramic actuator may be cylindrical.

[0140] According to some embodiments of this application, the adjustment mechanism 40 may also be an electric actuator, an electrode lead screw and nut mechanism, etc.

[0141] According to some embodiments of this application, such as Figure 1 and Figure 5 As shown, the drive mechanism 30 includes a drive connector 31, which is movably disposed on the base 10 along the first direction Z. One end of the drive connector 31 is connected to a power source. Under the action of the power source, the drive connector 31 moves along the first direction Z, thereby driving a pair of cutters 20 to close or open with each other along the first direction Z.

[0142] Optionally, in an embodiment where the cutting device 100 includes a connecting plate 60, one end of the drive connector 31 is connected to the connecting plate 60, and the other end is connected to a power source. When the drive connector 31 moves the connecting plate 60 along the first direction Z, the connecting plate 60 moves the first cutter 21 along the first direction Z, thereby causing the first cutter 21 to move closer to or further away from the second cutter 22. The power source can be a combination of a motor and a cam, or it can be an electric actuator, or it can be another linear drive mechanism 30.

[0143] According to some embodiments of this application, the base 10 is also provided with a hollow portion 17 to reduce the weight of the base 10.

[0144] According to some embodiments of this application, such as Figure 2 As shown, the blade of the first cutter 21 and the blade of the second cutter 22 are set at an angle to facilitate better cutting of the material strip.

[0145] According to some embodiments of the application, see Figures 1 to 5 This application provides a cutting device 100, which includes a base 10, a pair of cutters 20, a drive mechanism 30, and an adjustment mechanism 40. The pair of cutters 20 includes a first cutter 21 and a second cutter 22. The first cutter 21 is movably connected to the base 10 along a first direction Z, and the second cutter 22 is fixed to both ends of the base 10 along a third direction Y. The drive mechanism 30 drives the first cutter 21 to move along the first direction Z, so that the first cutter 21 moves closer to or further away from the second cutter 22. The base 10 is provided with a slit 11 and a guide hole 12. The slit 11 extends generally along the third direction Y and allows the base 10 to deform; the guide hole 12 extends along the first direction Z and is located on one side of the width direction of the slit 11. The first cutter 21 is connected to the guide rod 50, which is inserted into the guide hole 12. The guide rod 50 can move relative to the base 10 along the first direction Z to drive the first cutter 21 to move along the first direction Z. The adjustment mechanism 40 is a piezoelectric ceramic actuator used to adjust the size of the gap 11.

[0146] After the first cutter 21 and the second cutter 22 close to cut the strip, the piezoelectric ceramic actuator is energized. This actuator increases the width of the gap 11, thereby increasing the movement gap between the first cutter 21 and the second cutter 22 in the second direction X. This reduces the risk of the pair of cutters 20 contacting the strip during the opening process, lowers the probability of the cutters 20 scraping the strip, and improves the cutting quality. When the pair of cutters 20 open, the piezoelectric ceramic actuator is de-energized, and the base 10 returns to its initial state under the influence of its own material properties, ready for the next cut.

[0147] Figure 6A schematic flowchart of a cutting method 800 provided in some embodiments of this application is shown. According to some embodiments of this application, such as... Figure 6 As shown, this application also provides a cutting method 800, which includes:

[0148] S801, drives a pair of cutters 20 to close together along the first direction Z to cut the strip;

[0149] S802, to create a gap between a pair of cutters 20 in the second direction X, the second direction X being the direction of movement of the cutting strip and intersecting with the first direction Z;

[0150] S803 drives a pair of cutters 20 to open along the first direction Z.

[0151] It should be noted that driving a pair of cutters 20 to close together along the first direction Z means driving the first cutter 21 and the second cutter 22 to move closer to each other in the first direction Z; driving a pair of cutters 20 to open along the first direction Z means driving the first cutter 21 and the second cutter 22 to move away from each other in the first direction Z.

[0152] It is understood that the cutting method 800 of some embodiments of this application may be implemented, but is not limited to, using the cutting device 100 of any of the above embodiments.

[0153] Figure 7 A schematic block diagram of a cutting device 1000 provided in some embodiments of this application is shown. According to some embodiments of this application, such as... Figure 7 As shown, this application also provides a cutting device 1000, which includes a conveying device 900 and a cutting device 100. The conveying device 900 is used to convey electrode sheets, and the cutting device 100 is used to cut the electrode sheets.

[0154] According to the embodiments of this application, the cutting device 1000 has an adjustment mechanism 40, which can reduce the scraping of the material strip after the pair of cutters 20 cut the material strip during the opening process, resulting in higher cutting quality of the material strip and meeting the process requirements.

[0155] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. 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 cutting apparatus characterized by comprising: The cutting device comprises: a base; a pair of cutters mounted on the base; a driving mechanism configured to drive the pair of cutters to close or open to each other along a first direction; an adjusting mechanism configured to drive at least a portion of the base to elastically deform along a second direction before or during the driving of the pair of cutters to open by the driving mechanism, so as to generate a gap between the pair of cutters along the second direction, the second direction being a direction of movement of a material to be cut and intersecting the first direction; the base comprises a first seat and a second seat, at least a portion of the first seat being movable relative to the second seat along the second direction; the pair of cutters comprises a first cutter and a second cutter; the first cutter is arranged on the first seat; the second cutter is arranged on the second seat; the first seat comprises a first part and a second part, the first part being elastically deformable relative to the second seat along the second direction, the second part being connected to the second seat; the first cutter is arranged on the first part; the first part is provided with a weakened portion, the weakened portion being a region on the first part for reducing the difficulty of elastically deforming the base.

2. The cutting apparatus of claim 1, wherein, The second direction is perpendicular to the first direction.

3. The cutting apparatus of claim 1, wherein, The adjusting mechanism is configured to enable at least a portion of the first seat to elastically deform relative to the second seat along the second direction and to generate the gap between the first cutter and the second cutter along the second direction before or during the driving of the pair of cutters to open by the driving mechanism.

4. The cutting apparatus of claim 1, wherein The first part and the second part are provided with at least one gap elastically deformable along the second direction; the adjusting mechanism is configured to adjust the elastic deformation of the gap.

5. The cutting apparatus of claim 4, wherein, The gap extends substantially along a third direction, the third direction being perpendicular to the second direction and the first direction.

6. The cutting apparatus of claim 4, wherein, The first seat comprises at least two first parts, the first parts being arranged along a third direction, the third direction being perpendicular to the second direction and the first direction.

7. The cutting apparatus according to claim 1 or 4, wherein The pair of cutters comprises a first cutter and a second cutter, the first cutter being movably connected to the first part along the first direction, the second cutter being fixed to the second seat.

8. The cutting apparatus of claim 4, wherein, The first part is provided with a guide hole, and the cutting device further comprises: a guide rod extending along the first direction and slidably penetrating the guide hole; wherein the first cutter is fixed to the guide rod.

9. The cutting apparatus of claim 8, wherein, The gap comprises straight line segments and arc line segments connected to each other, the straight line segments extending along a third direction, the straight line segments and the arc line segments being alternately arranged along the third direction, the center of the guide hole coinciding with the center of the arc line segments, the third direction being perpendicular to the second direction and the first direction.

10. The cutting apparatus of claim 9, wherein, An extension line of the straight line segments passes through the center of the guide hole.

11. The cutting apparatus of claim 1, wherein, The weakened portion comprises a plurality of through holes, each of the through holes extending along a third direction, the plurality of through holes being arranged along the second direction, the third direction being perpendicular to the second direction and the first direction.

12. The cutting apparatus of claim 1, wherein, The adjusting mechanism is mounted between the first part and the second part.

13. The cutting apparatus of claim 12, wherein, The adjustment mechanism includes a piezoelectric ceramic actuator.

14. A cutting method using the cutting apparatus according to any one of claims 1 to 13, characterized by, Comprising: driving a pair of cutters to close to each other along a first direction to cut the material strip; causing the pair of cutters to generate a gap in a second direction, the second direction being the direction of movement of the cut material and intersecting the first direction; driving the pair of cutters to open along the first direction.

15. A cutting apparatus, characterized by Comprising: a conveying device for conveying the pole piece; the cutting device of any one of claims 1-13 for cutting the pole piece.

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