Slitting knife and battery pole piece slitting equipment

Abstract

The utility model provides a slitting knife and battery pole piece slitting equipment, and relates to the technical field of battery production. The slitting knife comprises a shaft sleeve assembly, a slitting knife assembly, a knife shaft assembly, a detection mechanism, a control mechanism and a spring assembly. The shaft sleeve assembly is arranged on the slitting knife assembly in a matched mode, the detection mechanism is arranged at one end of the shaft sleeve assembly, the control mechanism is connected with the detection mechanism and the spring assembly, and the knife shaft assembly comprises a first knife shaft and a second knife shaft. One end of the spring assembly is installed on the first cutter shaft, and the other end of the spring assembly is installed on the second cutter shaft. The slitting knife can achieve the technical effects of improving the slitting precision and the slitting operation efficiency.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and more specifically, to a slitting knife and battery electrode slitting equipment. Background Technology

[0002] Lithium-ion batteries have many outstanding advantages, such as light weight, large energy storage, high power, no pollution, long life, low self-discharge coefficient and wide temperature adaptability. Therefore, they are increasingly favored by people and have become the best power source for mobile devices and electric vehicles.

[0003] In related technologies, commonly used electrode cutting methods are mainly divided into two types: one is the electrode cutting of lithium-ion power batteries, which generally uses a slitting blade to cut the electrode with tabs into two strips; the other is the electrode cutting of lithium-ion batteries for mobile devices, which generally uses a slitting blade to cut the electrode into multiple strips and removes excess narrow edges on both sides of the electrode. Therefore, the position of the slitting blade is very important in the electrode cutting process.

[0004] Generally, in the slitting process, the position control of the slitting blade is mainly achieved by using a rigid ruler to measure the width of the slitting electrode or the narrow cut edge, or by relying on external auxiliary means (such as laser assistance, numerical display, mounting plate, etc.) to adjust the slitting blade parameters. Then, the electrode feeding position is manually adjusted according to the measured deviation. This control method is not only complex and cumbersome to operate, but also has many disadvantages such as large human operation error, slow response speed, low detection frequency, and the need to stop the machine for inspection, resulting in poor slitting efficiency. Utility Model Content

[0005] The purpose of this application is to provide a slitting knife and a battery electrode slitting device, which can achieve the technical effect of improving slitting accuracy and slitting operation efficiency.

[0006] In a first aspect, this application provides a slitting tool, including a bushing assembly, a slitting tool assembly, a cutter shaft assembly, a detection mechanism, a control mechanism, and a spring assembly;

[0007] The bushing assembly is matched and disposed on the slitting blade assembly, the detection mechanism is disposed at one end of the bushing assembly, the control mechanism is connected to the detection mechanism and the spring assembly respectively, the blade shaft assembly includes a first blade shaft and a second blade shaft, one end of the spring assembly is mounted on the first blade shaft and the other end of the spring assembly is mounted on the second blade shaft.

[0008] In the above implementation process, the slitting knife, through the setting of a detection mechanism, can measure the knife axis distance information between the first and second knife axes. This knife axis distance information represents the cutting depth data of the slitting knife when cutting battery electrodes. Therefore, the control mechanism can obtain the corresponding cutting depth data based on the knife axis distance information obtained by the detection mechanism. Combined with the pre-set electrode cutting parameters, the slitting knife parameters are automatically adjusted to ensure that the cutting depth data meets the requirements of the electrode cutting parameters. Thus, the slitting knife does not require manual adjustment of the electrode feeding position, making operation simple and convenient. It achieves automated cutting depth adjustment, avoiding many disadvantages such as large human operation errors, slow response speed, low detection frequency, and the need for machine stoppage for inspection, thereby achieving the technical effect of improving cutting accuracy and cutting operation efficiency.

[0009] Furthermore, the bushing assembly includes a first bushing and a second bushing, and the slitting blade assembly includes a cutter and a blade holder disposed opposite to each other, wherein the slitting blade is sleeved on the first bushing, the blade holder is sleeved on the second bushing, the first bushing is sleeved on the first blade shaft, and the second bushing is sleeved on the second blade shaft.

[0010] In the above implementation process, the first bushing, the tool, and the first tool shaft are sequentially sleeved and installed, and the second bushing, the tool holder, and the second tool shaft are sequentially sleeved and installed. The structure is simple and reliable, and the installation is convenient.

[0011] Furthermore, the first cutter shaft is a first air-expanding cutter shaft, the second cutter shaft is a second air-expanding cutter shaft, and the two ends of the spring assembly abut against the first air-expanding cutter shaft and the second air-expanding cutter shaft respectively. The distance between the first air-expanding cutter shaft and the second air-expanding cutter shaft is adjusted by the spring assembly.

[0012] In the above implementation process, both the first and second cutter shafts are air-expanded cutter shafts, which can achieve one-click tightening and loosening of the first and second bushings during the adjustment process, effectively improving the adjustment efficiency of the slitting blade parameters.

[0013] Furthermore, the cutter shaft assembly also includes a lateral adjustment mechanism, which is disposed on the first air-expanded cutter shaft and / or the second air-expanded cutter shaft.

[0014] In the above implementation process, the lateral adjustment mechanism is the lateral adjustment component of the air-expanding blade shaft, which realizes the lateral adjustment of the bushing. The relative position of the first bushing and the second bushing can be adjusted through the lateral adjustment mechanism.

[0015] Furthermore, the lateral adjustment mechanism is a movable air block.

[0016] Furthermore, the control mechanism includes a storage unit and a processing unit. The storage unit is connected to the processing unit and the detection mechanism, respectively. The detection mechanism acquires the cutter axis distance information of the cutter axis assembly. The storage unit stores the cutter axis distance information. The processing unit adjusts the cutting depth data of the slitting blade based on the cutter axis distance information.

[0017] In the above implementation process, the storage unit can be a data storage chip used to store the blade axis distance information obtained by the detection mechanism; the processing unit in the control mechanism is used to control the spring assembly and adjust the cutting depth data of the slitting blade.

[0018] Furthermore, the spring assembly is equipped with a sensor and an actuator. The processing unit is connected to the sensor and the actuator respectively. The processing unit obtains the extension and retraction amount of the spring assembly through the sensor and controls the extension and retraction amount of the spring assembly through the actuator.

[0019] Furthermore, the slitting blade also includes a slitting blade holder, on which the first blade shaft and the second blade shaft are respectively mounted, and the first blade shaft and the second blade shaft are arranged opposite to each other.

[0020] Furthermore, the slitting blade also includes an image acquisition device, which is disposed at one end of the slitting blade holder.

[0021] In the above implementation process, by setting up an image acquisition device, the cutting edge of the battery electrode can be image detected to obtain the cutting edge result, thereby enabling the adjustment prompts for the cutting blade and controlling the adjustment of the cutting depth data.

[0022] Furthermore, the detection mechanism is a laser ranging mechanism, which is installed on the first cutter shaft or the second cutter shaft. The laser ranging mechanism acquires the cutter shaft distance information of the cutter shaft assembly, and the control mechanism adjusts the cutting depth data of the slitting blade based on the cutter shaft distance information.

[0023] Secondly, this application provides a battery electrode slitting apparatus, including the slitting blade described in any one of the first aspects.

[0024] Other features and advantages disclosed in this application will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the above-described technology disclosed in this application.

[0025] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application 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.

[0027] Figure 1 This is a schematic diagram of the slitting blade provided in an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the structure of the bushing assembly and the slitting blade assembly provided in the embodiments of this application.

[0029] Reference numerals: bushing assembly 100; first bushing 110; second bushing 120; slitting blade assembly 200; cutter 210; blade holder 220; blade shaft assembly 300; first blade shaft 310; second blade shaft 320; transverse adjustment mechanism 330; detection mechanism 400; control mechanism 500; spring assembly 600; slitting blade holder 700. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] It should be understood that the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application. In the various embodiments of this application, it should be understood that the sequence number of the above processes does not imply a necessary order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0032] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0033] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0034] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0035] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0036] Generally, in the slitting process of battery electrodes, the position control of the slitting blade is mainly achieved by using a rigid ruler to measure the width of the slitting electrode or the narrow cut edge, or by relying on external auxiliary means (such as laser assistance, numerical display, mounting plate, etc.) to adjust the slitting blade parameters. Then, the electrode feeding position is manually adjusted according to the measured deviation. This control method is not only complex and cumbersome to operate, but also has many disadvantages such as large human operation error, slow response speed, low detection frequency, and the need to stop the machine for inspection, resulting in poor slitting efficiency.

[0037] To address the aforementioned technical problems, this application provides a slitting blade equipped with a detection mechanism. The detection mechanism acquires the blade axis distance information of the slitting blade, and then automatically adjusts the cutting depth of the slitting blade based on the blade axis distance information to improve slitting accuracy and efficiency.

[0038] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the slitting blade provided in an embodiment of this application. Figure 2 This is a schematic diagram of the structure of the bushing assembly and the slitting blade assembly provided in the embodiments of this application; the slitting blade includes a bushing assembly 100, a slitting blade assembly 200, a blade shaft assembly 300, a detection mechanism 400, a control mechanism 500, and a spring assembly 600;

[0039] The bushing assembly 100 is matched and disposed on the slitting blade assembly 200. The detection mechanism 400 is disposed on one end of the bushing assembly 100. The control mechanism 500 is connected to the detection mechanism 400 and the spring assembly 600 respectively. The blade shaft assembly 300 includes a first blade shaft 310 and a second blade shaft 320. One end of the spring assembly 600 is installed on the first blade shaft 310 and the other end of the spring assembly 600 is installed on the second blade shaft 320.

[0040] For example, the bushing assembly 100 is configured with two bushings, which are respectively sleeved on the first cutter shaft 310 and the second cutter shaft 320.

[0041] For example, the bushing in the bushing assembly 100 may be a cylindrical bushing with a cross-section of two concentric circles, and the inner diameter of the cylindrical bushing matches the shaft diameter of the first cutter shaft 310 / the second cutter shaft 320.

[0042] For example, the bushing in the bushing assembly 100 can also be an irregular bushing. The inner cross section of the irregular bushing is circular, and the inner diameter of the irregular bushing matches the shaft diameter of the first tool shaft 310 / second tool shaft 320. The outer cross section of the irregular bushing can be square, triangular, conical, or other shapes. When the bushing is an irregular bushing, it can adapt to more complex assembly requirements.

[0043] For example, the bushing in the bushing assembly 100 can also be a stepped bushing; wherein, the inner or outer diameter of the stepped bushing changes in a stepped manner to adjust the fitting clearance between the bushing and the tool shaft, and can adapt to multi-level shaft diameter requirements.

[0044] For example, the slitting blade assembly 200 is equipped with a cutter and cutter accessories (such as a blade holder that matches the cutter), and the cutter and cutter accessories are mounted on the corresponding bushing of the bushing assembly 100; when the battery electrode passes between the first cutter shaft 310 and the second cutter shaft 320, the cutter on the slitting blade assembly 200 performs a slitting operation on the battery electrode.

[0045] For example, the cutter shaft assembly 300 is configured with a first cutter shaft 310 and a second cutter shaft 320 for fitting into the bushing of the bushing assembly 100.

[0046] For example, the detection mechanism 400 can be a distance measuring mechanism, which detects / measures the tool axis distance information between the first tool axis 310 and the second tool axis 320.

[0047] For example, the cutter axis distance information between the first cutter axis 310 and the second cutter axis 320 represents the cutting depth data when the cutter 210 cuts the battery electrode sheet.

[0048] For example, the control mechanism 500 can preset the electrode cutting parameters, and then, based on the electrode cutting parameters and the cutter shaft distance information obtained by the detection mechanism 400, the control mechanism 500 can adjust the first cutter shaft 310 and the second cutter shaft 320 accordingly through the spring assembly 600, thereby realizing the automatic adjustment of the cutting depth data of the cutter 210 to meet the electrode cutting parameters; thus, the cutter does not need to manually adjust the electrode feeding position, the operation is simple and convenient, and the technical effect of automatic cutting depth adjustment is achieved.

[0049] For example, the spring assembly 600 is equipped with a spring body, which can be a hydraulic spring. A hydraulic spring is a spring that uses liquid as a medium and achieves elastic deformation through liquid compression, exhibiting a stable elastic state. It mainly consists of a piston, cylinder, sealing ring, elastic diaphragm, compensating valve, and connecting parts. When liquid is forced into the hydraulic spring cylinder, the piston and elastic diaphragm deform under the compression of the liquid, thereby generating elastic force.

[0050] It should be understood that the spring body can also be other types of springs, such as magnetic springs, composite material springs, etc.

[0051] The slitting blade, through the detection mechanism 400, can measure the blade axis distance information between the first blade axis 310 and the second blade axis 320. This blade axis distance information represents the cutting depth data of the cutter 210 when slitting the battery electrode sheets. Therefore, the control mechanism 500 can obtain the corresponding cutting depth data based on the blade axis distance information obtained by the detection mechanism 400. Combined with the pre-set electrode sheet slitting parameters, it can automatically adjust the slitting blade parameters to ensure that the cutting depth data meets the requirements of the electrode sheet slitting parameters. Thus, the slitting blade does not require manual adjustment of the electrode sheet feeding position, making operation simple and convenient. It achieves automated cutting depth adjustment, avoiding many disadvantages such as large human operation errors, slow response speed, low detection frequency, and the need for machine stoppage for inspection, thereby improving the technical effect of slitting accuracy and slitting operation efficiency.

[0052] In some embodiments, the bushing assembly 100 includes a first bushing 110 and a second bushing 120, and the slitting blade assembly 200 includes a cutter 210 and a blade holder 220 disposed opposite to each other, wherein the cutter 210 is sleeved on the first bushing 110, the blade holder 220 is sleeved on the second bushing 120, the first bushing 110 is sleeved on the first blade shaft 310, and the second bushing 120 is sleeved on the second blade shaft 320.

[0053] For example, the cutter 210 is matched with the cutter holder 220. When the battery electrode passes between the cutter 210 and the cutter holder 220, the battery electrode is cut by the cutter 210, thereby completing the electrode cutting operation.

[0054] In some embodiments, the blade holder 220 has a recessed design, with the blade edge of the cutter 210 embedded in the recess of the blade holder 220. This design allows for better cutting of the battery electrode sheets and also protects the cutter 210. The recessed design of the blade holder 220 can be V-shaped, U-shaped, or semi-circular, among other shapes.

[0055] For example, the cutter 210 can be a circular cutter, which is sleeved on the first bushing 110; when the cutter 210 is a circular cutter, the first bushing 110 can rotate during the cutting process of the cutter 210;

[0056] The cutting knife 210 can also be other types of knives, such as square knives, butterfly knives, or combination knives of various shapes.

[0057] For example, the first bushing 110 and the second bushing 120 can be bushings with grooves; one end of the first bushing 110 and the second bushing 120 has a groove, which can be locked with the fixing structure (e.g., protrusion, slot, etc.) on the cutter shaft, thereby achieving precise positioning of the cutter shaft.

[0058] For example, the material of the cutter 210 can be cemented carbide (e.g., tungsten steel, high-speed steel, etc.), cermet (e.g., carbide-based cermet, nitride-based cermet, etc.); the surface of the cutter 210 can also be coated, for example, the surface of the cutter 210 is treated with diamond-like carbon (Ta-C) coating, so that the surface hardness of the cutter 210 is close to that of diamond, with strong anti-adhesion, reducing electrode debris, and effectively improving the cutting efficiency, burr control and service life of the cutter 210.

[0059] For example, the cutting edge of the cutter 210 can be designed as a small cutting edge or a large cutting edge; for example, when the cutting edge of the cutter 210 is designed as a small cutting edge, the cutting edge angle of the cutter 210 can be designed as 26° to 35°, which is suitable for cutting battery electrode sheets that are harder and thicker; when the cutting edge of the cutter 210 is designed as a large cutting edge, the cutting edge angle of the cutter 210 can be designed as 45° to 90°, which is suitable for cutting battery electrode sheets that are softer and thinner.

[0060] For example, the installation method between the bushing assembly 100 and the cutter shaft assembly 300 (first bushing 110 and first cutter shaft 310, second bushing 120 and second cutter shaft 320) may include snap ring fixing, screw / bolt fixing, hydraulic clamping fixing, heat fitting fixing, etc.; wherein, the heat fitting fixing method is to heat the bushing to expand it and then fit it into the cutter shaft, and after cooling, the bushing and the cutter shaft form an interference fit.

[0061] For example, the installation method between the bushing assembly 100 and the slitting blade assembly 200 (cutter 210 and first bushing 110, blade holder 220 and second bushing 120) may include snap ring fixing, screw / bolt fixing, hydraulic clamping fixing, heat fitting fixing, etc.

[0062] In some embodiments, the first cutter shaft 310 is a first air-expanding cutter shaft, the second cutter shaft 320 is a second air-expanding cutter shaft, and the two ends of the spring assembly 600 abut against the first air-expanding cutter shaft and the second air-expanding cutter shaft respectively. The distance between the first air-expanding cutter shaft and the second air-expanding cutter shaft is adjusted by the spring assembly 600.

[0063] For example, both the first cutter shaft 310 and the second cutter shaft 320 are air-expanded cutter shafts, which can achieve one-click tightening and loosening of the first bushing 110 and the second bushing 120 during the adjustment process, effectively improving the adjustment efficiency of the slitting blade parameters.

[0064] It should be understood that the first cutter shaft 310 and the second cutter shaft 320 can also be other types of cutter shafts, such as mechanical cutter shafts, hydraulic cutter shafts, quick-change cutter shafts, etc.

[0065] For example, the distance between the first cutter shaft 310 and the second cutter shaft 320 is determined according to the specifications of the battery electrode, the specifications of the bushing assembly 100, and the specifications of the slitting blade assembly 200. For instance, the distance between the first cutter shaft 310 and the second cutter shaft 320 is greater than the sum of the wall thickness of the first bushing 110, the wall thickness of the second bushing 120, and the thickness of the battery electrode, so that the battery electrode can pass through the gap between the first bushing 110 and the second bushing 120 without obstruction. The distance between the first cutter shaft 310 and the second cutter shaft 320 is less than the sum of the wall thickness of the first bushing 110, the wall thickness of the second bushing 120, and the length of the cutter 210, so that when the battery electrode passes through the gap between the first bushing 110 and the second bushing 120, the cutter 210 slits the battery electrode.

[0066] In some embodiments, the cutter shaft assembly 300 further includes a lateral adjustment mechanism 330, which is disposed on the first air-expanded cutter shaft and / or the second air-expanded cutter shaft.

[0067] For example, the lateral adjustment mechanism 330 is a lateral adjustment component of the air-expanding blade shaft, realizing the lateral adjustment of the bushing. The relative position of the first bushing 110 and the second bushing 120 can be adjusted through the lateral adjustment mechanism 330. In this embodiment, "lateral" in the lateral adjustment of the bushing refers to the axial direction of the first bushing 110 or the second bushing 120.

[0068] In some embodiments, the lateral adjustment mechanism 330 is a movable air block; wherein, the movable air block is a mechanical component that achieves rapid fixing or release of the first air-expanding blade shaft and / or the second air-expanding blade shaft by inflating and expanding, and controls the expansion and contraction of the surface of the air-expanding blade shaft by air pressure changes, thereby efficiently completing the fixing and adjustment of the air-expanding blade shaft.

[0069] It should be understood that the lateral adjustment mechanism 330 can also adopt other structures, such as a piezoelectric ceramic actuator, which utilizes the piezoelectric effect to achieve position adjustment.

[0070] In some embodiments, the control mechanism 500 includes a storage unit and a processing unit. The storage unit is connected to the processing unit and the detection mechanism, respectively. The detection mechanism acquires the cutter shaft distance information of the cutter shaft assembly. The storage unit stores the cutter shaft distance information. The processing unit adjusts the cutting depth data of the slitting blade based on the cutter shaft distance information.

[0071] For example, the storage unit can be a data storage chip for storing the cutter axis distance information acquired by the detection mechanism 400; the processing unit in the control mechanism can be a PLC (Programmable Logic Controller) mechanism for controlling the spring assembly 600 and adjusting the cutting depth data of the cutter 210.

[0072] For example, the data storage chip can be SRAM (Static Random-Access Memory), Flash memory, etc.

[0073] For example, the processing unit can also be an embedded microcontroller or an FPGA (Field Programmable Gate Array).

[0074] In some embodiments, the spring assembly 600 is configured with a sensor and an actuator, and the processing unit is connected to the sensor and the actuator respectively. The processing unit obtains the extension and contraction amount of the spring assembly through the sensor and controls the extension and contraction amount of the spring assembly through the actuator.

[0075] For example, the spring assembly 600 is equipped with a corresponding sensor (such as a displacement sensor, a pressure sensor, etc.). The sensor feeds back the sensor data it obtains to the processing unit. The processing unit can monitor the extension and contraction of the spring assembly 600 in real time based on the sensor data feedback.

[0076] The processing unit receives data from the sensor, analyzes the current extension and retraction of the spring assembly 600 and compares it with the target extension and retraction, and calculates the required adjustment amount. The target extension and retraction is determined based on the depth of cut data. The processing unit adjusts the extension and retraction of the spring assembly 600 by actuators such as motors, hydraulic cylinders or pneumatic devices according to the adjustment amount.

[0077] For example, a displacement sensor, also known as a linear sensor, is a linear device that senses metal and converts the displacement of the corresponding device into electrical signal data. When the sensor on the spring assembly 600 is a displacement sensor, the processing unit receives the displacement data from the displacement sensor and calculates the current extension or retraction of the spring assembly 600 based on the displacement data. The type of displacement sensor can be a potentiometer-type displacement sensor, an inductive displacement sensor, a synchro, a capacitive displacement sensor, an eddy current displacement sensor, a Hall effect displacement sensor, etc.

[0078] For example, a pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to a certain rule; when the sensor on the spring assembly 600 is a pressure sensor, the processing unit receives the pressure data from the pressure sensor and calculates the current extension and contraction of the spring assembly 600 based on the pressure data; wherein, the type of pressure sensor can be a piezoresistive pressure sensor, a piezoelectric pressure sensor, a capacitive pressure sensor, an optical fiber pressure sensor, a vibrating wire pressure sensor, etc.

[0079] In some embodiments, the slitting blade further includes a slitting blade holder 700, with a first blade shaft 310 and a second blade shaft 320 respectively mounted on the slitting blade holder 700, and the first blade shaft 310 and the second blade shaft 320 being arranged opposite to each other.

[0080] For example, the first cutter shaft 310 and the second cutter shaft 320 on the slitting blade holder 700 can be arranged in parallel relative to each other, and a certain distance is maintained between the first cutter shaft 310 and the second cutter shaft 320; thus, when the battery electrode passes between the first cutter shaft 310 and the second cutter shaft 320, the cutter 210 on the first bushing 110 and the cutter holder 220 on the second bushing 120 cooperate with each other to achieve precise slitting of the battery electrode and complete the electrode slitting operation.

[0081] For example, the first cutter shaft 310 and the second cutter shaft 320 on the slitting cutter holder 700 can be arranged opposite each other at a certain included angle, and a certain distance is maintained between the first cutter shaft 310 and the second cutter shaft 320; when there is an included angle between the first cutter shaft 310 and the second cutter shaft 320, it is suitable for occasions where it is necessary to cut battery electrode sheets at a specific angle.

[0082] For example, the slitting tool holder includes a tool holder base and a tool shaft mounting part, wherein the tool shaft mounting part is mounted on the tool holder base; the tool shaft mounting part includes two mounting posts arranged opposite to each other, the two mounting posts are respectively mounted at both ends of the tool holder base, and the mounting posts are provided with corresponding mounting slots, the first tool shaft 310 and the second tool shaft 320 are respectively mounted on the two mounting posts through the mounting slots; it should be understood that the mounting method of one of the mounting posts to the first tool shaft 310 / second tool shaft 320 is movable, that is, the distance between the first tool shaft 310 and the second tool shaft 320 is adjusted by the spring assembly 600.

[0083] For example, the mounting slot can be installed in a mechanical manner with the first cutter shaft 310 / second cutter shaft 320, such as by screw / bolt installation, snap ring installation, elastic retaining ring installation, etc.

[0084] For example, the mounting groove and the first cutter shaft 310 / second cutter shaft 320 can also be installed in other ways, such as hydraulic clamping fixation, conical surface mating fixation, etc.

[0085] When the mounting slot is installed with the first cutter shaft 310 / second cutter shaft 320 by hydraulic clamping, the hydraulic expansion sleeve on the mounting slot is deformed by the hydraulic cylinder to evenly clamp the cutter shaft. When the inner wall of the expansion sleeve is in contact with the cutter shaft, the gap between the expansion sleeve and the cutter shaft is eliminated.

[0086] When the mounting groove is fixed to the first cutter shaft 310 / second cutter shaft 320 by a conical fit, the surface shape of the mounting groove and the end face shape of the cutter shaft are both conical, and the conical fit rate between the cutter shaft and the mounting groove is greater than a preset value (e.g., ≥85%), which facilitates fixing by using the self-locking force of the conical surface; during installation, the end of the cutter shaft is gently tapped into the mounting groove, and the self-locking force of the conical surface is used to achieve fixing.

[0087] In some embodiments, the slitting blade further includes an image acquisition device disposed at one end of the slitting blade holder 700.

[0088] For example, by setting up an image acquisition device, the cutting edge of the battery electrode can be image detected to obtain the cutting edge result, thereby enabling the adjustment prompts for the cutting blade and controlling the adjustment of the cutting depth data.

[0089] For example, the image acquisition device can be a CCD mechanism; wherein, a CCD (charge coupled device) mechanism is a digital camera with a charge coupled device image sensor;

[0090] Image acquisition devices can also be other types of image sensors, such as CMOS (complementary metal oxide semiconductor) mechanisms, FPA (focal plane array) mechanisms, etc.

[0091] In some embodiments, the detection mechanism 400 is a laser ranging mechanism, which is installed on the first cutter shaft or the second cutter shaft. The laser ranging mechanism acquires the cutter shaft distance information of the cutter shaft assembly 300, and the control mechanism 500 adjusts the cutting depth data of the slitting blade based on the cutter shaft distance information.

[0092] For example, the control mechanism 500 obtains the current cutting depth data of the slitting blade based on the blade axis distance information, compares the current cutting depth data with the preset cutting depth data, and calculates the cutting depth adjustment data required for the slitting blade; then, the control mechanism 500 controls the spring assembly 600 to adjust the distance between the first blade axis 310 and the second blade axis 320 accordingly based on the cutting depth adjustment data, thereby completing the cutting depth data adjustment of the slitting blade.

[0093] It should be understood that the testing unit 400 can also be other types of ranging components, such as ultrasonic ranging components.

[0094] This application provides a battery electrode slitting device, including... Figure 1 and Figure 2 The slitting blade shown.

[0095] For example, the battery electrode slitting equipment is used to slit battery electrodes; the battery electrode is the core component of a secondary battery, consisting of a positive electrode and a negative electrode, which realizes the mutual conversion of chemical energy and electrical energy through electrochemical reaction; wherein, the secondary battery, also known as a rechargeable battery or storage battery, is a device that realizes energy storage and release through reversible electrochemical reaction, and can be repeatedly charged and discharged thousands of times, and can be applied in consumer electronics, electric vehicles, energy storage systems and other fields; the types of secondary batteries include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, sodium-ion batteries, magnesium-ion batteries, nickel-metal hydride batteries, etc., and the battery electrode in the embodiments of this application can be any of the above-mentioned types of secondary batteries, which is only an example and not a limitation.

[0096] For example, before the slitting blade cuts the battery electrode sheets, the shape of the battery electrode sheets needs to be determined according to the battery design requirements and process requirements; for example, the shape characteristics of the battery electrode sheets before cutting may include:

[0097] Continuous strip structure: The battery electrode sheet before slitting is a continuous long strip structure, which can be a single layer or a multi-layer structure; when the battery electrode sheet is a multi-layer structure, it can be composed of current collector (positive electrode aluminum foil / negative electrode copper foil) and double-sided coated active material coating; among them, some battery electrode sheets need to reserve the tab area, and are cut into specific shapes (such as tab spacing, length, height) through the die-cutting process to meet the subsequent welding requirements.

[0098] Die-cut preformed structure: The shape of the battery electrode includes rectangular, arc or crescent shape, etc., and is generally designed for wound batteries. The battery electrode needs to be die-cut with tabs or marking holes in advance to distinguish the cell units.

[0099] It should be understood that the battery electrodes before slitting can also adopt other shapes and structures, such as irregular designs (such as L-shaped or T-shaped), pre-marked and gradient coatings, etc.

[0100] The battery electrode slitting equipment provided in this application features an online closed-loop adjustable cutting depth design. A specific implementation example is shown below:

[0101] The testing organization 400 can perform online testing and obtain measurement data, which may include the blade axis distance information of the blade axis assembly 300 in the slitting blade, and the lateral position information of the cutter 210 in the slitting blade;

[0102] Measurement data is stored in the storage unit; the storage unit also stores the cutting amount adjustment data for different types of battery electrodes, wherein the cutting amount adjustment data can be used as the basis for online adjustment of battery electrode parameter settings when switching between different machine tools;

[0103] The processing unit, based on measurement data and online monitoring of the cutting depth changes of existing production electrodes, performs online closed-loop adjustment of the cutting depth. This online closed-loop adjustment is achieved through online monitoring and transmission of data via the detection mechanism 400. The transmitted and aggregated data is analyzed and compared at the processing unit, and adjustments are made when abnormal values ​​are detected. For example, if the current cutting depth is too low, the processing unit outputs a cutting depth increase command, closing either the first or second air-expanding cutter shaft. The cutter shaft assembly 300 is then in an adjustable state, and the lateral adjustment mechanism 330 makes fine adjustments to prevent cutter surface wear during the cutting depth adjustment process. After lateral adjustment, the spring assembly 600 depresses, increasing the cutting depth. The results are output in real time after each adjustment to determine if the cutting depth meets the requirements and whether the horizontal alignment is correct. If not, the above actions are repeated.

[0104] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A slitting knife characterized by, The application relates to a slitting cutter, which comprises a shaft sleeve assembly, a slitting cutter assembly, a cutter shaft assembly, a detection mechanism, a control mechanism and a spring assembly. The shaft sleeve assembly is matched with the slitting cutter assembly, the detection mechanism is arranged at one end of the shaft sleeve assembly, the control mechanism is connected with the detection mechanism and the spring assembly respectively, the cutter shaft assembly comprises a first cutter shaft and a second cutter shaft, one end of the spring assembly is arranged on the first cutter shaft, and the other end of the spring assembly is arranged on the second cutter shaft.

2. The slitter knife of claim 1, wherein The shaft sleeve assembly comprises a first shaft sleeve and a second shaft sleeve, the slitting cutter assembly comprises a cutter and a cutter seat arranged oppositely, the slitting cutter is sleeved on the first shaft sleeve, the cutter seat is sleeved on the second shaft sleeve, the first shaft sleeve is sleeved on the first cutter shaft, and the second shaft sleeve is sleeved on the second cutter shaft.

3. The slitter knife of claim 2, wherein, The first cutter shaft is a first air-expanding cutter shaft, the second cutter shaft is a second air-expanding cutter shaft, the two ends of the spring assembly abut against the first air-expanding cutter shaft and the second air-expanding cutter shaft respectively, and the distance between the first air-expanding cutter shaft and the second air-expanding cutter shaft is adjusted by the spring assembly.

4. The slitter knife of claim 3, wherein, The cutter shaft assembly further comprises a transverse adjusting mechanism arranged on the first air-expanding cutter shaft and / or the second air-expanding cutter shaft.

5. The slitter knife of claim 1 wherein, The control mechanism comprises a storage unit and a processing unit, the storage unit is connected with the processing unit and the detection mechanism, the detection mechanism acquires cutter shaft distance information of the cutter shaft assembly, the storage unit stores the cutter shaft distance information, and the processing unit adjusts the cutter bite data of the slitting cutter based on the cutter shaft distance information.

6. The slitter knife of claim 5, wherein, The spring assembly is provided with a sensor and an actuator, the processing unit is connected with the sensor and the actuator, the processing unit acquires the expansion and contraction amount of the spring assembly through the sensor, and controls the expansion and contraction amount of the spring assembly through the actuator.

7. The slitter knife of claim 1 wherein, The slitting cutter further comprises a slitting cutter frame, the first cutter shaft and the second cutter shaft are arranged oppositely and are arranged on the slitting cutter frame respectively.

8. The slitter knife of claim 7, wherein, The slitting cutter further comprises an image acquisition device arranged at one end of the slitting cutter frame.

9. The slitter knife of claim 1, wherein, The detection mechanism is a laser ranging mechanism, the laser ranging mechanism is arranged on the first cutter shaft or the second cutter shaft, cutter shaft distance information of the cutter shaft assembly is acquired through the laser ranging mechanism, and the control mechanism adjusts the cutter bite data of the slitting cutter based on the cutter shaft distance information.

10. A battery electrode sheet slitting apparatus characterized by, The application further relates to a slitting cutter comprising any one of the slitting cutters in claims 1 to 9.

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