Cutting device and equipment for preparing battery pole piece

Abstract

The utility model provides a cutting device and equipment for preparing a battery pole piece, and the equipment comprises an upper cutter assembly and a lower cutter assembly which are arranged in a relative movement manner for cutting; the upper cutter assembly is composed of an upper cutter base, an upper cutter and an upper cutter fixing piece. The upper cutter base is formed by sequentially laying a first metal layer, at least one first non-metal layer and a second metal layer; the upper cutter is fixed to the side face of the upper cutter base through an upper cutter fixing piece. The lower cutter assembly comprises a lower cutter base and a lower cutter, and the lower cutter is fixed to the lower cutter base and matched with the upper cutter in a cutting mode. The sandwich structure of the upper knife base is combined with the lower knife, so that the light weight is realized, the rigidity is kept, and the vibration is reduced; and the upper cutter is fixed through the upper cutter fixing piece, so that the mounting reliability is enhanced, the technical problem that the cutting die cannot continuously provide a high-quality cutting effect is effectively solved, and the cutting stability and the quality of the electrode assembly are improved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing, and in particular to a cutting device and equipment for preparing battery pole pieces. Background Art

[0002] With the development of battery technology, the application fields of batteries are becoming more and more extensive. Batteries can be used in many fields such as automobiles, aircraft, ships, mobile devices or computers. In the structure of batteries, the electrode assembly inside the battery shell is its core part, which is usually formed by stacking or winding pole pieces coated with active materials.

[0003] In the existing battery pole piece manufacturing process, cutting cutters are usually used to cut continuous pole piece materials into pole pieces of specific lengths according to the requirements of the battery design. These pole pieces are then used to build the battery electrode assembly. The precision and quality of the cutting mold tool directly affect the accuracy of pole piece cutting, which in turn affects the consistency of the electrode assembly, the capacity and discharge efficiency of the battery; at the same time, the design and maintenance of the tool determine the generation of burrs on the edge of the pole piece. If the burrs are not effectively controlled, they may cause internal short circuits in the battery, seriously threatening the safety and reliability of the battery. Existing cutting molds cannot continuously provide high-quality cutting effects, affecting the quality of the electrode assembly and the overall performance of the battery. Utility Model Content

[0004] In view of the above problems, the present application provides a cutting device and equipment for preparing battery electrodes, which is used to solve the technical problem that the above-mentioned cutting mold cannot continuously provide high-quality cutting effects, affecting the quality of the electrode assembly and the overall performance of the battery.

[0005] To achieve the above-mentioned purpose, the present application provides a cutting device for preparing battery pole pieces, comprising an upper knife assembly and a lower knife assembly, wherein the upper knife assembly and the lower knife assembly are arranged to move relative to each other;

[0006] The upper knife assembly comprises an upper knife base, an upper knife and an upper knife fixing member; the upper knife base comprises a stacked first metal layer, at least one first non-metal layer and a second metal layer, the first non-metal layer is arranged between the first metal layer and the second metal layer; the upper knife is fixed to the side of the upper knife base by the upper knife fixing member;

[0007] The lower knife assembly comprises a lower knife base and a lower knife. The lower knife is fixed to the lower knife base and cooperates with the upper knife for cutting.

[0008] Furthermore, a first fixing hole is formed on the first metal layer, a second fixing hole is formed on the second metal layer, and the upper knife is fixed to the side surface of the upper knife base by an upper knife fixing member passing through the first fixing hole and the second fixing hole.

[0009] Furthermore, at least one of the upper knife fixing members is simultaneously inserted into the first fixing hole and the second fixing hole.

[0010] Furthermore, the at least one upper knife fixing member includes a fixed pressure block, a first fastener and a second fastener, the fixed pressure block has a first through hole and a second through hole, the first fastener and the second fastener pass through the first through hole and the second through hole respectively, and are respectively fixed to the first fixing hole and the second fixing hole, and clamp the upper knife arranged between the fixed pressure block and the upper knife base.

[0011] Different from the prior art, the present application is a cutting device for preparing battery electrodes. By changing the materials of the upper knife base and the lower knife base, the upper knife base adopts a sandwich structure of a first metal layer, a first non-metallic layer and a second metal layer, which reduces the weight while maintaining rigidity and reducing vibration under high-speed cutting; at the same time, the upper knife is fixed to the first metal layer and the second metal layer through an upper knife fixing part, and the knife adopts a lightweight design while enhancing the installation reliability of the knife, thereby effectively solving the technical problem that the cutting mold cannot continuously provide high-quality cutting effects, and improving the cutting stability and the quality of the electrode assembly.

[0012] Furthermore, the lower knife includes a third metal layer and a second non-metal layer stacked up and down, and the third metal layer is fixed to the lower knife base.

[0013] Different from the prior art, the present application prepares a cutting device for battery pole pieces, and the lower knife adopts a combination of a second non-metallic layer and a third metal layer, which reduces weight while maintaining rigidity to improve stability and optimize cutting quality. Different from the prior art, the present application prepares a cutting device for battery pole pieces, and the lower knife assembly adopts a structure in which the third metal layer is fixed to the lower knife base, which reduces the impact of vibration of the equipment under high-speed cutting, optimizes cutting quality, reduces the generation of burrs and irregular edges, and improves the overall quality of the product.

[0014] Furthermore, the lower knife assembly also includes a cutter guide block, which is arranged above the lower knife, and the cutter guide block includes a first guide slope and a second guide slope; the first guide slope is connected to the second guide slope, and the first guide slope is inclined from top to bottom toward the direction of the second guide slope, and in the forward direction of the battery electrode, the first guide slope is arranged opposite to the upper blade edge of the upper knife.

[0015] Furthermore, the lower end of the second guiding slope is aligned with the lower cutting edge.

[0016] Furthermore, the cutter guide block comprises a first cutter guide block and a second cutter guide block which are arranged along the extension direction of the lower cutting edge, and a channel for the battery electrode to pass through is between the first cutter guide block and the second cutter guide block.

[0017] Furthermore, the inclination angle of the first guiding slope relative to the relative movement direction of the upper knife and the lower knife ranges from 1 degree to 30 degrees.

[0018] Different from the prior art, the present application is a cutting device for preparing battery pole pieces. The first guide bevel serves as a guide bevel, which helps the upper knife to smoothly approach and transition to the cutting edge of the lower knife during the cutting process to avoid direct impact; the first guide bevel guides the upper knife to smoothly transition to the cutting edge of the lower knife, and the second guide bevel is flush with the cutting edge of the lower knife to ensure precise alignment during the cutting process and reduce cutting errors.

[0019] Furthermore, the upper knife assembly further comprises a material pressing plate, and the material pressing plate comprises a pressing plate and a pressing plate buffer structure; the pressing plate is arranged below the upper knife, and is connected to the upper knife base through the pressing plate buffer structure, and when not cutting, the pressing plate is lower than the upper knife;

[0020] The pressure plate buffer structure is compressed in the relative movement direction of the upper knife and the lower knife when the pressure plate presses against the battery pole piece.

[0021] Furthermore, the pressure plate buffer structure is a spring buffer structure.

[0022] Furthermore, the pressure plate buffer structure includes a pressure plate limiting guide column, a pressure plate limiting guide sleeve and a buffer component; the pressure plate limiting guide column is vertically installed on the side of the upper knife base close to the lower knife assembly, the pressure plate limiting guide sleeve is installed on the side of the pressure plate close to the lower knife assembly and cooperates with the pressure plate limiting guide column, and the buffer component is connected between the pressure plate limiting guide column and the pressure plate limiting guide sleeve.

[0023] Different from the prior art, the present application prepares a cutting device for battery electrodes. The pressing plate applies uniform pressure to the object to be cut during the cutting process. The pressing plate limiting guide pins provide stable guidance for the pressing plate. The pressing plate sliding assembly cooperates with the pressing plate limiting guide pins to enable the pressing plate to reciprocate smoothly between the upper knife assembly and the lower knife assembly. Through the precise control and stable movement of the pressing plate, the damage to the electrode during the cutting process is reduced, the generation of burrs is reduced, and the quality of the electrode assembly is improved.

[0024] Furthermore, at least one blowing hole is provided on a side surface of the pressing plate close to the lower knife assembly, and the blowing opening direction of the blowing hole is toward the upper knife edge.

[0025] Furthermore, the upper blade edge angle is 15-90 degrees, and / or the lower blade edge angle is 85-90 degrees.

[0026] The present application is a cutting device for preparing battery pole pieces. After cutting is completed, the blowing mechanism is started to blow air to the upper blade edge through the blowing hole to eliminate dust and other debris accumulated on the upper blade edge during the cutting process, and also effectively play a role in heat dissipation and cooling, thereby reducing blade passivation and gap changes caused by dust adhesion, maintaining the cutting quality and extending the service life of the blade.

[0027] Further, at least one guide column is respectively provided on both sides of the lower knife base, and at least one guide sleeve is respectively provided at corresponding positions at both ends of the upper knife base, and the guide column is adapted to the guide sleeve so that the upper knife base and / or the lower knife base can move relative to each other for cutting; or

[0028] At least one guide sleeve is respectively arranged on both sides of the lower knife base, and at least one guide column is respectively arranged at corresponding positions at both ends of the upper knife base. The guide column is adapted to the guide sleeve so that the upper knife base and / or the lower knife base can move relative to each other for cutting.

[0029] Different from the prior art, the cutting device for preparing battery pole pieces in the present application ensures the accuracy and consistency of cutting by the upper and lower knives through the precise coordination of the guide pins and guide sleeves, reduces vibration and wear during the cutting process, and extends the service life of the equipment.

[0030] Furthermore, the first metal layer, the second metal layer and the third metal layer are made of iron material, steel material or alloy material; the first non-metal layer and the second non-metal layer are made of ceramic or ceramic composite material; the upper blade edge and the lower blade edge are made of tungsten steel alloy material, diamond material or ceramic or ceramic composite material.

[0031] In order to solve the above technical problems, this application also provides another technical solution:

[0032] A device for preparing battery pole pieces, comprising a cutting device for preparing battery pole pieces according to any one of the above technical solutions.

[0033] Different from the prior art, the present application prepares battery electrode equipment by changing the materials of the upper knife base and the lower knife base. The upper knife base adopts a sandwich structure of a first metal layer, a first non-metallic layer and a second metal layer, which reduces the weight while maintaining rigidity and reducing vibration under high-speed cutting; at the same time, the upper knife is fixed to the first metal layer and the second metal layer through an upper knife fixing part, and the knife adopts a lightweight design while enhancing the installation reliability of the knife, thereby effectively solving the technical problem that the cutting mold cannot continuously provide high-quality cutting effects, and improving the cutting stability and the quality of the electrode assembly.

[0034] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0036] Figure 1 It is a front view of a cutting device for preparing a battery electrode sheet provided in one embodiment of the present application;

[0037] Figure 2 yes Figure 1 A partial enlarged view of section XII;

[0038] Figure 3 It is a left side view of a cutting device for preparing battery pole pieces provided in one embodiment of the present application;

[0039] Figure 4 yes Figure 3 A partial enlarged view of part IX;

[0040] Figure 5 It is a rear view of the three-dimensional structure of a cutting device for preparing battery pole pieces provided in one embodiment of the present application;

[0041] Figure 6 yes Figure 1 A partial enlarged view of part III;

[0042] Figure 7 This is a front view of the three-dimensional structure of a cutting device for preparing battery pole pieces provided in one embodiment of the present application;

[0043] The reference numerals in the above drawings are described as follows:

[0044] 1. Cutting device for preparing battery pole pieces;

[0045] 10. Upper knife assembly; 101. Upper knife base; 1011. First metal layer; 1012. First non-metal layer; 1013. Second metal layer; 102. Upper knife; 1020. Upper knife edge; 103. Guide sleeve; 104. Pressing plate; 1041. Pressing plate; 1042. Pressing plate buffer structure; 1043. Pressing plate limit guide pin; 1044. Pressing plate limit guide sleeve; 1045. Buffer; 1046. Blowing hole;

[0046] 20, lower knife assembly; 201, lower knife base; 202, lower knife; 2020, lower knife edge; 2021, second non-metal layer; 2022, third metal layer; 203, cutter guide block; 203a, first cutter guide block; 203b, second cutter guide block; 2031, first guide slope; 2032, second guide slope; 204, guide column;

[0047] 30, upper knife fixing piece; 301, fixing pressing block; 3011, first through hole; 3012, second through hole; 302, first fastener; 303, second fastener;

[0048] 40. Upper knife base connector. DETAILED DESCRIPTION

[0049] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0050] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0051] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0052] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0055] In the manufacturing process of lithium-ion battery pole pieces, the performance of the cutting mold is crucial to the quality and performance of the battery. In the related art, the tool fixing method of the cutting mold is not stable enough, which makes the tool easy to move or loosen during the long cutting process. This instability will affect the cutting accuracy and thus affect the quality of the electrode assembly. After long-term use or under high load conditions, the tool of the cutting mold may break or wear, reducing the durability of the cutting mold and affecting the cutting quality. Therefore, the existing cutting mold cannot continuously provide high-quality cutting effects, which directly affects the quality of the electrode assembly and the overall performance of the battery.

[0056] In view of the above problems, the present application provides a cutting device and equipment for preparing battery pole pieces, which is used to solve the technical problem that the cutting mold has unstable tool fixing during long-term cutting, which affects the cutting quality of battery pole pieces. The cutting device for preparing battery pole pieces changes the materials of the upper knife base and the lower knife base. The upper knife base adopts a sandwich structure of the first metal layer, the first non-metallic layer and the second metal layer, and the lower knife adopts a combination of the second non-metallic layer and the third metal layer, which reduces the weight while maintaining rigidity and reducing vibration under high-speed cutting; at the same time, the upper knife is fixed to the first metal layer and the second metal layer through the upper knife fixing part, and the knife adopts a lightweight design while strengthening the installation reliability of the knife, thereby effectively solving the technical problem that the cutting mold cannot continuously provide high-quality cutting effects, and improving the cutting stability and the quality of the electrode assembly.

[0057] Among them, the cutting device for preparing battery pole pieces can be used for cutting lithium-ion battery pole pieces, and this application does not limit this. The cutting device for preparing battery pole pieces can be used for cutting various battery pole pieces, such as pole pieces of lithium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, sodium-ion batteries, polymer batteries, etc. This battery is suitable for various electrical devices that use batteries, such as mobile phones, tablet computers, portable game consoles, laptops, electric toys, household power tools, battery vehicles, electric vehicles, electric bicycles, power tools, forklifts, industrial robots, grid energy storage, solar and wind energy storage, drones, satellites, spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; the battery is used to provide electrical energy for the above-mentioned electrical equipment.

[0058] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the batteries and devices described above.

[0059] Please also refer to Figure 1 and Figure 2 , Figure 1 A front view of a cutting device for preparing a battery electrode sheet provided in some embodiments of the present application; Figure 2 yes Figure 1 A partial enlarged view of part XII in the figure. The cutting device 1 for preparing battery pole pieces in the embodiment of the present application is used for cutting battery pole pieces to form battery pole piece elements. The cutting device 1 for preparing battery pole pieces includes an upper knife assembly 10 and a lower knife assembly 20, and the upper knife assembly 10 and the lower knife assembly 20 are arranged to move relative to each other. The upper knife assembly 10 includes an upper knife base 101, an upper knife 102 and an upper knife fixing member 30; the upper knife base 101 includes a stacked first metal layer 1011, at least one first non-metal layer 1012 and a second metal layer 1013, and the first non-metal layer 1012 is arranged between the first metal layer 1011 and the second metal layer 1013; the upper knife 102 is fixed to the side of the upper knife base 101 through the upper knife fixing member 30. The lower knife assembly 20 includes a lower knife base 201 and a lower knife 202, and the lower knife 202 is fixed to the lower knife base 201 and cooperates with the upper knife 102 in cutting.

[0060] In this embodiment, the first non-metal layer 1012 can directly form an ABA structure between the first metal layer 1011 and the second metal layer 1013. In other embodiments, other material layers or structures can be arranged between the metal layer and the non-metal layer to form a structure such as ACBDA, as long as the first non-metal layer 1012 is located in the space between the first metal layer 1011 and the second metal layer 1013 in structure, and the two are not required to be in direct contact, and there can be other structures between them.

[0061] By changing the material of the upper knife base 101, the upper knife base 101 adopts a sandwich structure of a first metal layer, a first non-metal layer and a second metal layer, which reduces weight while maintaining rigidity and reducing vibration under high-speed cutting; at the same time, the upper knife 102 is fixed to the side of the upper knife base 101 through the upper knife fixing member 30, and the knife adopts a lightweight design while strengthening the installation reliability of the knife, improving the cutting stability and the quality of the electrode assembly. The lower knife 202 adopts a combination of a non-metal layer and a metal layer, which also reduces the weight of the lower knife assembly 20 and reduces the impact of vibration of the cutting device 1 for preparing battery pole pieces under high-speed cutting.

[0062] The first metal layer 1011 is provided with a first fixing hole (not shown), the second metal layer 1013 is provided with a second fixing hole (not shown), and the upper knife 102 is fixed to the side of the upper knife base 101 by an upper knife fixing member 30 passing through the first fixing hole and the second fixing hole.

[0063] In this embodiment, the first metal layer 1011 and the second metal layer 1013 are made of iron material, aluminum material, copper material, steel material or alloy material, and the first non-metal layer 1012 is made of ceramic or ceramic composite material. The non-metal layer is lighter than the metal layer, so that the overall weight of the upper knife base 101 is reduced, the inertia during the cutting process is reduced, and the cutting speed and response speed are improved. In this way, the metal layer provides high strength and rigidity, and the non-metal layer reduces weight, thereby ensuring the stability and durability of the upper knife base 101 during use. Further, the non-metal layer has excellent wear resistance, reduces the wear of the upper knife base 101, thereby extending the service life; the non-metal layer can also absorb and reduce vibration during the cutting process, improve cutting accuracy and stability; the non-metal layer also has good thermal stability and heat insulation performance, can control the temperature of the upper knife base 101, and prevent overheating; at the same time, the structure of the upper and lower metal layers also effectively avoids the middle non-metal layer from bumping and causing gaps during installation and use, thereby avoiding affecting the rigidity of the upper knife 102. The sandwich structure design of the upper knife base 101 ensures the reliability and stability of the upper knife assembly 10 in long-term use.

[0064] Furthermore, at least one of the upper knife fixing members 30 is simultaneously passed through the first fixing hole and the second fixing hole.

[0065] In this embodiment, the number of the upper knife fixing members 30 is 6.

[0066] The upper knife fixing member 30 comprises a fixing block 301, a first fastener 302 and a second fastener 303. The fixing block 301 is provided with a first through hole 3011 and a second through hole 3012. The first fastener 302 and the second fastener 303 respectively pass through the first through hole 3011 and the second through hole 3012, and are respectively fixed to the first fixing hole and the second fixing hole, and clamp the upper knife 102 disposed between the fixing block 301 and the upper knife base 101.

[0067] The upper knife 102, as an upper knife, needs to be stably mounted on the upper knife base 101 to perform cutting operations. Specifically, the fixed pressing block 301 is arranged on a side surface of the upper knife 102, the first through hole 3011 is located at the upper part of the fixed pressing block 301, and the second through hole 3012 is located at the lower part of the fixed pressing block 301. The first metal layer 1011 and the second metal layer 1013 of the upper knife base 101 are respectively provided with a first fixing hole and a second fixing hole, which match the first through hole 3011 and the second through hole 3012 of the upper knife fixing member 30, and the upper knife 102 is also provided with corresponding holes (not shown). During the installation process, the holes of the upper knife 102, the first through hole 3011 and the second through hole 3012 of the upper knife fixing member 30, the first fixing hole of the first metal layer 1011, and the second fixing hole of the second metal layer 1013 are aligned accordingly to ensure that the first fastener 302 and the second fastener 303 can be correctly passed through and fastened respectively. In this way, the first fastener 302 can pass through the first through hole 3011, and sequentially enter the hole corresponding to the upper knife 102 and the first fixing hole of the first metal layer 1011, and be fastened; similarly, the second fastener 303 can also pass through the second through hole 3012, and sequentially enter the hole corresponding to the upper knife 102 and the second fixing hole of the second metal layer 1013, and be fastened. After fastening, the upper knife 102 is firmly fixed on the first metal layer 1011 and the second metal layer 1013 of the upper knife base 101 through the upper knife fixing member 30, thereby ensuring the stability and accuracy of the upper knife 102 during high-speed cutting, improving the cutting quality and extending the service life of the knife.

[0068] Please also see Figure 1 , Figure 3 and Figure 4 , Figure 3 This is a left side view of a device for preparing a lithium-ion battery pole piece element provided in one embodiment of the present application. Figure 4 yes Figure 3 The lower knife 202 is fixedly mounted on the surface of the lower knife base 201 close to the upper knife assembly 10, and the lower knife 202 is arranged opposite to the upper knife 102 for cutting operation.

[0069] The lower blade 202 includes a third metal layer 2022 and a second non-metal layer 2021 stacked up and down. The third metal layer 2022 is fixed to the lower blade base 201 and is close to the surface of one side of the upper blade assembly 10.

[0070] In this embodiment, the second non-metallic layer 2021 is made of ceramic or a ceramic composite material, and the third metal layer 2022 is made of iron, aluminum, copper, steel or alloy.

[0071] The lower knife 202 is a combination of a non-metallic layer and a metal layer, which also reduces the weight of the lower knife assembly 20. The lower knife assembly 20 adopts a structure in which the metal layer is fixed to the lower knife base 201, which greatly reduces the impact of vibration of the cutting device 1 for preparing battery electrodes under high-speed cutting. Due to the reduction of vibration and the improvement of stability, the cutting quality is optimized, and the generation of burrs and irregular edges is reduced, thereby improving the overall quality of the product.

[0072] Furthermore, the lower knife assembly 20 also includes a cutter guide block 203, which is arranged above the lower knife 202; the cutter guide block 203 includes a first guide slope 2031 and a second guide slope 2032; the first guide slope 2031 is inclined from top to bottom toward the second guide slope 2032, and in the forward direction of the battery electrode, the first guide slope 2031 is arranged opposite to the upper knife edge 1020.

[0073] The lower end of the second guiding slope 2032 is aligned with the lower blade edge 2020. The cutter guide block 203 cooperates with the lower blade 202 to guide the upper blade 102 to perform precise cutting.

[0074] like Figure 4 As shown, the y direction is the relative movement direction of the upper knife 102 and the lower knife 202. In this embodiment, the inclination angle of the first guide slope 2031 relative to the relative movement direction of the upper knife 102 and the lower knife 202 is α 3The range is 1 degree to 30 degrees.

[0075] Specifically, the first guide slope 2031 is connected to the second guide slope 2032, and the lower end of the second guide slope 2032 is flush with the lower blade edge 2020, ensuring that the upper blade edge 1020 of the upper knife 102 can accurately enter the lower blade edge 2020 for cutting. The first guide slope 2031 is inclined inwardly by a first angle from the second guide slope 2032, so that the upper knife 102 can smoothly transition to the second guide slope 2032 along the first guide slope 2031 during the downward movement, and then align with the lower blade edge 2020 to achieve accurate cutting.

[0076] In this embodiment, the cutter guide block 203 includes a first cutter guide block 203a and a second cutter guide block 203b arranged along the extension direction of the lower cutting edge 2020, and a channel for the battery electrode to pass through is between the first cutter guide block 203a and the second cutter guide block 203b.

[0077] During the operation of the cutting device 1 for preparing battery pole pieces, when the upper knife assembly 10 moves downward to apply pressure, the upper knife edge 1020 enters the first guide slope 2031 area of ​​the cutter guide block 203. The first guide slope 2031 guides the upper knife 102, guiding the upper knife 102 to smoothly transition to the lower knife edge 2020 for cutting. During this process, the second guide slope 2032 of the cutter guide block 203 is flush with the lower knife edge 2020 to ensure the accuracy and consistency of cutting. After the cutting is completed, the upper knife assembly 10 moves upward, and the cutter guide block 203 maintains its structure and position during this process to prepare for the next cutting.

[0078] Please refer again Figure 1 and Figure 3 At least one guide column 204 is respectively provided on both sides of the lower knife base 201, and at least one guide sleeve 103 is respectively provided at the corresponding positions at both ends of the upper knife base 101. The guide column 204 is adapted to the guide sleeve 103, so that the upper knife base 101 and / or the lower knife base 201 can move relative to each other for cutting.

[0079] Specifically, at least one guide column 204 is vertically fixed to the two side surfaces of the lower knife base 201 to guide and support the movement of the upper knife base 101. Accordingly, the guide sleeve 103 is adapted to the guide column 204, allowing the upper knife base 101 to move up and down along the guide column 204.

[0080] During the operation of the cutting device 1 for preparing battery electrodes, when the upper knife base 101 needs to move downward for cutting, the driving mechanism (not shown) drives the upper knife base 101 to slide downward along the guide column 204 through the guide sleeve 103, so that the upper knife 102 cuts the object to be cut. After the cutting is completed, the driving mechanism drives the upper knife base 101 to slide upward along the guide column 204 through the guide sleeve 103 and returns to the initial position. Similarly, the driving mechanism can also drive the lower knife base 201 to achieve the upper and lower movement and cutting of the lower knife 202 through the cooperation of the guide column 204 and the guide sleeve 103. This linkage movement of the upper and lower knives ensures the accuracy and consistency of the cutting through the precise cooperation of the guide column 204 and the guide sleeve 103. The design of the guide column 204 and the guide sleeve 103 reduces the vibration and wear during the cutting process and extends the service life of the equipment.

[0081] Furthermore, the cutting device 1 for preparing battery pole pieces also includes an upper knife base connector 40 .

[0082] Specifically, the upper knife base connector 40 is a component that connects the upper knife base 101 and the main device driving power source, and is disposed at one end or both sides of the upper knife base 101 .

[0083] When the driving power source of the main device is started, the power is transmitted to the upper knife base 101 through the upper knife base connector 40, so that the upper knife base 101 can drive the upper knife 102 to move down precisely along the guide column 204 and the guide sleeve 103. When the cutting is completed, the power is transmitted to the upper knife base 101 through the upper knife base connector 40, so that the upper knife base 101 can drive the upper knife 102 to move up precisely along the guide column 204 and the guide sleeve 103, and the upper knife 102 that has completed the cutting is reset to prepare for the next cutting.

[0084] During the operation of the cutting device 1 for preparing battery pole pieces, the upper knife base connector 40 is not only responsible for transmitting the driving force of the power source to the upper knife base 101, but also ensures the precise movement of the upper knife 102 during the cutting process. Through the setting and linkage principle of the upper knife base connector 40, the cutting device 1 for preparing battery pole pieces can achieve efficient and precise cutting operations, thereby improving production efficiency and product quality.

[0085] Please also see Figure 1 , 5 and Figure 6 , Figure 5 yes Figure 1 A partial enlarged view of part III; Figure 6 It is a rear view of the three-dimensional structure of an apparatus for preparing a lithium-ion battery pole piece element provided in one embodiment of the present application.

[0086] The upper knife assembly 10 further includes a material pressing plate 104, which includes a pressing plate 1041 and a pressing plate buffer structure 1042. The pressing plate 1041 is disposed below the upper knife 102 and is connected to the upper knife base 101 through the pressing plate buffer structure 1042. When not cutting, the pressing plate 1041 is lower than the upper knife 102. The pressing plate buffer structure 1042 is compressed in the relative motion direction between the upper knife 102 and the lower knife 202 when the pressing plate 1041 presses against the battery electrode.

[0087] In this embodiment, the pressure plate buffer structure 1042 is a spring buffer structure.

[0088] Specifically, the pressure plate buffer structure 1042 includes a pressure plate limiting guide column 1043, a pressure plate limiting guide sleeve 1044 and a buffer component 1045; the pressure plate limiting guide column 1043 is vertically installed on the side of the upper knife base 101 close to the lower knife assembly 20, the pressure plate limiting guide sleeve 1044 is installed on the side of the pressure plate 1041 close to the lower knife assembly 20, and cooperates with the pressure plate limiting guide column 1043, and the buffer component 1045 is connected between the pressure plate limiting guide column 1043 and the pressure plate limiting guide sleeve 1044.

[0089] The pressure plate limiting guide pin 1043, the pressure plate limiting guide sleeve 1044 and the buffer member 1045 cooperate with each other to guide the pressure plate 1041 to reciprocate and position between the upper knife assembly 10 and the lower knife assembly 20, thereby ensuring the stability of the object being cut during the cutting process.

[0090] Furthermore, at least one blowing hole 1046 is opened on the side surface of the pressure plate 1041 close to the lower knife assembly 20, and the blowing opening direction of the blowing hole 1046 is toward the upper knife edge 1020, which is used to blow air to clean the upper knife edge 1020 during the cutting process to reduce dust accumulation and maintain the sharpness and cutting accuracy of the upper knife edge 1020.

[0091] During the operation of the cutting device 1 for preparing battery electrodes, when the power source drives the upper knife assembly 10 to move downward, the pressure plate 1041 moves downward accordingly and drives the pressure plate limiting guide pillar 1043 to move downward, compressing the buffer 1045. When the upper knife assembly 10 moves downward to a certain distance, the pressure plate 1041 presses the object to be cut onto the second non-metallic layer 2021 of the lower knife 202 and the lower knife edge 2020. The pressure plate 1041 presses the object to be cut to ensure the stability of the object to be cut during the cutting process and prevent displacement during the cutting process. After the cutting is completed, the external power source drives the upper blade assembly 10 to move upward. At this time, the blowing hole 1046 on the pressure plate 1041 starts the blowing mechanism facing the upper blade edge 1020, and blows air to the upper blade edge 1020 through the blowing hole 1046 to eliminate the dust and other debris accumulated and attached to the upper blade edge 1020 during the cutting process, thereby reducing the edge passivation and gap changes caused by dust adhesion, maintaining the cutting quality and extending the service life of the edge. During the upward movement of the upper blade assembly 10, the pressure plate 1041 drives the pressure plate limit guide column 1043 to move upward, releasing the pressure of the buffer 1045, and the cut object can achieve quantitative forward movement, while the cutter guide block 203 maintains its structure and position during this process, ready to perform the next cutting.

[0092] like Figure 5As shown, the cutting device 1 for preparing battery pole pieces of the embodiment of the utility model is used to realize efficient and accurate lithium-ion battery pole piece cutting operation. The cutting device 1 for preparing battery pole pieces can obtain a power source for driving the cutter by connecting the upper knife base 101 and the upper knife base connector 40 to the main device, so that the upper and lower knives can accurately operate along the guide pillars 204 and guide sleeves 103 on both sides to realize cutting of the material to be cut. Specifically, the cutting device 1 for preparing battery pole pieces has the following three driving and cutting modes:

[0093] Driving mode 1: The lower knife base 201 is fixed, and the upper knife base connector 40 is connected to a driving mechanism (not shown). The driving mechanism drives the upper knife 102 to move toward the lower knife 202 through the guide sleeves 103 on both sides along the guide posts 204 on both sides of the lower knife base 201. This one-way driving mode is suitable for simple cutting operations, in which the upper knife 102 moves downward to complete the cutting task.

[0094] Driving mode 2: The upper knife base 101 is fixed, and the lower knife base 201 is connected to a driving mechanism (not shown). The driving mechanism drives the guide posts 204 on both sides of the lower knife 202 to move along the guide sleeves 103 on both sides of the upper knife base 101 toward the upper knife 102. This driving mode enables the lower knife 202 to move upward for cutting, and is suitable for scenes where cutting from top to bottom is required.

[0095] Driving mode three: The upper knife base 101 and the lower knife base 201 are both connected to a driving mechanism (not shown) to achieve bidirectional driving. In this composite driving mode, the guide sleeves 103 on both sides of the upper knife 102 move along the guide posts 204 on both sides of the lower knife base 201 toward the lower knife 202, and at the same time, the guide posts 204 on both sides of the lower knife 202 move along the guide sleeves 103 on both sides of the upper knife base 101 toward the upper knife 102. This bidirectional driving mode enables the upper and lower knives to cut from both sides to the middle, which is suitable for complex application scenarios that require efficient cutting.

[0096] Through these three driving cutting modes, the cutting device 1 for preparing battery pole pieces of the embodiment of the utility model can adapt to different cutting requirements and provide a flexible cutting solution. Whether it is unidirectional cutting or bidirectional cutting, the cutting device 1 for preparing battery pole pieces can achieve high-precision cutting operations to ensure the quality and consistency of lithium-ion battery pole pieces.

[0097] Optionally, taking driving mode 1 as an example, the working principle of the cutting device 1 for preparing battery pole pieces is described in detail:

[0098] 1. Initial state:

[0099] The lower knife base 201 is fixed, the upper knife base connector 40 is connected to the driving power source of the main device, and the object to be cut is placed between the upper knife 102 and the lower knife 202.

[0100] 2. Cutting process:

[0101] When the power source is started, the upper knife base connector 40 drives the upper knife assembly 10 to apply downward pressure, and the upper knife base 101 moves in a predetermined direction along the guide columns 204 on both sides of the lower knife base 201 through the guide sleeves 103 on both sides, driving the upper knife 102 and the pressing plate 104 to move downward synchronously.

[0102] The material pressing plate 104 first contacts the object to be cut and presses it against the second non-metallic layer 2021 of the lower blade 202 and the lower blade edge 2020. As the upper blade assembly 10 continues to move downward, the material pressing plate 104 approaches the object to be cut, and the buffer 1045 is compressed by resistance, so that the object to be cut is further pressed, ensuring the stability of the object to be cut during the cutting process.

[0103] 3. Guiding and cutting:

[0104] The upper blade edge 1020 enters the cutter guide block 203 area on the lower blade 202. The cutter guide block 203 is designed with a first guide slope 2031 and a second guide slope 2032. The first guide slope 2031 is inclined inward at a first angle ( α 3≥1°), the second guide slope 2032 is flush with the lower blade edge 2020. This design provides a smooth guiding effect for the upper blade 102, so that it can smoothly transition to the lower blade edge 2020, effectively avoiding the collision between the upper and lower blades caused by the gap between the guide column 204 and the guide sleeve 103 or insufficient processing accuracy, thereby protecting the cutter from damage.

[0105] 4. Complete cutting:

[0106] After cutting is completed, the external power source drives the upper knife assembly 10 to move upward through the upper knife base connector 40. At this time, the blowing holes 1046 on the pressing plate 104 blow air to the upper knife edge 1020 to remove attached dust, slow down dust accumulation, and keep the edge clean and sharp.

[0107] During the rising process, the upper knife assembly 10 drives the pressure plate limiting guide pin 1043 to move upward, releasing the pressure of the buffer member 1045, so that the object to be cut can move forward quantitatively, preparing for the next cutting.

[0108] For the second and third driving cutting methods, the working principle of the cutting device 1 for preparing battery pole pieces is the same, that is, the upper and lower knives move toward each other through the bidirectional driving of the upper knife base 101 and the lower knife base 201 to complete the cutting task. This bidirectional driving method is suitable for scenes requiring efficient cutting and can further improve production efficiency.

[0109] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0110] like Figure 4 As shown, the y direction is the relative movement direction of the upper knife 102 and the lower knife 202, and the x direction is the moving direction of the battery electrode. α 1 is 15-90 degrees; the lower blade edge angle 2020 α 2 is 85-90 degrees.

[0111] This embodiment also relates to a device for preparing a battery pole piece, including a cutting device for preparing a battery pole piece, a power supply, and a control device. The power supply supplies power to the cutting device 1 and the driving mechanism for preparing the battery pole piece, and the control device is used to control the operation of the cutting device 1 and the driving mechanism for preparing the battery pole piece. The control device is a conventional electric control box, and the specific principle is not repeated here.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A cutting device for preparing battery pole pieces, comprising an upper knife assembly and a lower knife assembly, characterized in that: The upper knife assembly and the lower knife assembly are arranged to move relative to each other; The upper knife assembly comprises an upper knife base, an upper knife and an upper knife fixing member; the upper knife base comprises a stacked first metal layer, at least one first non-metal layer and a second metal layer, the first non-metal layer is arranged between the first metal layer and the second metal layer; the upper knife is fixed to the side of the upper knife base by the upper knife fixing member; The lower knife assembly comprises a lower knife base and a lower knife. The lower knife is fixed to the lower knife base and cooperates with the upper knife for cutting.

2. The cutting device for preparing battery pole pieces according to claim 1, characterized in that: The first metal layer is provided with a first fixing hole, the second metal layer is provided with a second fixing hole, and the upper knife is fixed to the side surface of the upper knife base through an upper knife fixing member passing through the first fixing hole and the second fixing hole.

3. The cutting device for preparing battery pole pieces according to claim 2, characterized in that: At least one of the upper knife fixing members is simultaneously inserted into the first fixing hole and the second fixing hole.

4. The cutting device for preparing battery pole pieces according to claim 3, characterized in that: At least one of the upper knife fixing members includes a fixed pressure block, a first fastener and a second fastener. The fixed pressure block has a first through hole and a second through hole. The first fastener and the second fastener pass through the first through hole and the second through hole respectively, and are fixed to the first fixing hole and the second fixing hole respectively, and clamp the upper knife arranged between the fixed pressure block and the upper knife base.

5. The cutting device for preparing battery pole pieces according to claim 1, characterized in that: The lower knife comprises a third metal layer and a second non-metal layer stacked up and down, and the third metal layer is fixed to the lower knife base.

6. The cutting device for preparing battery pole pieces according to claim 1, characterized in that: The lower knife assembly also includes a cutter guide block, which is arranged above the lower knife, and the cutter guide block includes a first guide slope and a second guide slope; the first guide slope is connected to the second guide slope, and the first guide slope is inclined from top to bottom toward the direction of the second guide slope. In the forward direction of the battery electrode, the first guide slope is arranged opposite to the upper knife edge of the upper knife.

7. The cutting device for preparing battery pole pieces according to claim 6, characterized in that: The lower end of the second guiding slope is aligned with the lower cutting edge.

8. The cutting device for preparing battery pole pieces according to claim 6, characterized in that: The cutter guide block comprises a first cutter guide block and a second cutter guide block which are arranged along the extension direction of the lower cutting edge, and a channel for the battery pole piece to pass is formed between the first cutter guide block and the second cutter guide block.

9. The cutting device for preparing battery pole pieces according to claim 6, characterized in that: The inclination angle of the first guiding slope relative to the relative movement direction of the upper knife and the lower knife ranges from 1 degree to 30 degrees.

10. The cutting device for preparing battery pole pieces according to claim 1, characterized in that: The upper knife assembly further includes a material pressing plate, which includes a pressing plate and a pressing plate buffer structure; the pressing plate is arranged below the upper knife and connected to the upper knife base through the pressing plate buffer structure, and when not cutting, the pressing plate is lower than the upper knife; The pressure plate buffer structure is compressed in the relative movement direction of the upper knife and the lower knife when the pressure plate presses against the battery pole piece.

11. The cutting device for preparing battery pole pieces according to claim 10, characterized in that: The pressure plate buffer structure is a spring buffer structure.

12. The cutting device for preparing battery pole pieces according to claim 10, characterized in that: The pressure plate buffer structure includes a pressure plate limiting guide column, a pressure plate limiting guide sleeve and a buffer component; the pressure plate limiting guide column is vertically installed on the side of the upper knife base close to the lower knife assembly, the pressure plate limiting guide sleeve is installed on the side of the pressure plate close to the lower knife assembly and cooperates with the pressure plate limiting guide column, and the buffer component is connected between the pressure plate limiting guide column and the pressure plate limiting guide sleeve.

13. The cutting device for preparing battery pole pieces according to claim 12, characterized in that: At least one blowing hole is provided on a side surface of the pressing plate close to the lower knife assembly, and the blowing opening direction of the blowing hole faces the upper knife edge.

14. The cutting device for preparing battery pole pieces according to claim 12, characterized in that: The upper blade edge angle is 15-90 degrees, and / or the lower blade edge angle is 85-90 degrees.

15. The cutting device for preparing battery pole pieces according to claim 1, characterized in that: At least one guide column is respectively provided on both sides of the lower knife base, and at least one guide sleeve is respectively provided at the corresponding positions of the two ends of the upper knife base, and the guide column is adapted to the guide sleeve to enable the upper knife base and / or the lower knife base to move relative to each other for cutting; or At least one guide sleeve is respectively arranged on both sides of the lower knife base, and at least one guide column is respectively arranged at corresponding positions at both ends of the upper knife base. The guide column is adapted to the guide sleeve so that the upper knife base and / or the lower knife base can move relative to each other for cutting.

16. The cutting device for preparing battery pole pieces according to claim 5, characterized in that: The first metal layer, the second metal layer and the third metal layer are made of iron material, steel material or alloy material; the first non-metal layer and the second non-metal layer are made of ceramic or ceramic composite material; the upper blade edge and the lower blade edge are made of tungsten steel alloy material, diamond material or ceramic or ceramic composite material.

17. A device for preparing a battery pole piece, characterized in that: It comprises a cutting device for preparing battery pole pieces as described in any one of claims 1-16.

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