Rolling device, method, apparatus, storage medium and rolling machine

Abstract

The application provides a rolling device, method, equipment, storage medium and rolling machine, and relates to the technical field of lithium battery manufacturing. The device comprises a roller, a passing roller, a displacement sensor and a controller. The passing roller comprises an entering pulling passing roller and an exiting pulling passing roller. The entering pulling passing roller and the exiting pulling passing roller are arranged on the two sides of the central shaft of the roller along the rolling conveying direction of the incoming material. The displacement sensor is arranged on the entering pulling passing roller and the exiting pulling passing roller. The displacement sensor is electrically connected with the controller. The roller is used for rolling the incoming material. The displacement sensor is used for recording the entering displacement and the exiting displacement of the entering pulling passing roller and the exiting pulling passing roller during rotation. The controller is used for calculating the elongation of the incoming material according to the entering displacement and the exiting displacement during the rolling process of the incoming material. The online automatic measurement of the elongation of the rolling incoming material is realized. The human cost of manual measurement is reduced. The practicability, detection accuracy and efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery manufacturing, and in particular to a rolling device, method, equipment, storage medium and rolling machine. Background Art

[0002] In the lithium battery manufacturing process, the main material particles are in a freely stacked state after the electrode is coated. At this time, the energy density of the electrode is very small and does not meet industrial needs. The electrode compaction density needs to be increased by roller pressure. During the rolling process, the foil will be stretched due to the force. The common zebra-coated electrode will have inconsistent extension after rolling due to the thickness difference between the coating area and the foil area during the rolling process. The coating area is thicker and can be fully stretched, while the foil area is insufficiently stretched, resulting in wrinkling or breaking of the electrode.

[0003] The pole piece elongation refers to the ratio of the thickness and length of the pole piece, which is the thickness of the pole piece. After the pole piece strip is rolled to make it thinner and smaller, the pole piece will be rolled. Currently, the pole piece elongation needs to be tested after the rolling operation is completed. Existing elongation testing methods cannot accurately calculate the pole piece elongation using speed, resulting in large errors. Summary of the Invention

[0004] In view of this, the purpose of the embodiments of the present application is to provide a rolling device, method, equipment, storage medium and rolling machine. The rolling device is equipped with a roller, a passing roller, a displacement sensor and a controller to test the elongation of the incoming material after rolling. The displacement sensor on the passing roller is used to record the entry displacement and exit displacement of the incoming material before and after being rolled by the roller in real time. The controller calculates the elongation of the incoming material in real time based on the entry displacement and exit displacement, thereby realizing online automatic measurement of the elongation of the incoming material, improving the accuracy, and thus solving the above-mentioned technical problems.

[0005] In a first aspect, an embodiment of the present application provides a rolling device, comprising: a roller, a passing roller, a displacement sensor and a controller; the passing roller comprises: an inlet passing roller and an outlet passing roller; the inlet passing roller and the outlet passing roller are respectively arranged on both sides of the central axis of the roller along the pole piece rolling and conveying direction; the displacement sensor is arranged on the inlet passing roller and the outlet passing roller; the displacement sensor is electrically connected to the controller; the roller is used to roll the incoming material; the displacement sensor is used to record the inlet displacement and the outlet displacement when the inlet passing roller and the outlet passing roller rotate; the controller is used to calculate the elongation of the incoming material during the rolling process of the incoming material based on the inlet displacement and the outlet displacement.

[0006] In the technical solution of the embodiment of the present application, a rolling device consisting of a roller, a passing roller, a displacement sensor and a controller is set up to test the elongation rate of the incoming material after rolling. The displacement sensor on the passing roller is used to record in real time the entry displacement and exit displacement of the incoming material before and after being rolled by the roller. The controller calculates the elongation rate of the incoming material in real time based on the entry displacement and exit displacement, thereby realizing online automatic measurement of the elongation rate of the incoming material. It is compatible with online automatic measurement of incoming materials of different models and sizes, reduces manual measurement manpower, and improves practicality, detection accuracy and efficiency.

[0007] In some embodiments, the incoming material includes: a pole piece; the displacement sensor includes: an input encoder and an output encoder; the input encoder is rotatably provided on the axial end surface of the input roller; the output encoder is rotatably provided on the axial end surface of the output roller; the input encoder is used to record the number of rotations of the input roller during rotation; the output encoder is used to record the number of rotations of the output roller during rotation; the controller is specifically used to calculate the elongation of the pole piece during the pole piece rolling process based on the number of rotations of the input roller and the number of rotations of the output roller. The embodiment of the present application uses a rolling device comprising a roller, a roller, a displacement sensor, and a controller to test the elongation of the pole piece after rolling. The input encoder and the output encoder installed on the roller record the number of rotations of the input roller and the output roller driven by the pole piece before and after being rolled by the roller. The controller calculates the elongation of the pole piece in real time based on the number of rotations, thereby achieving online automatic measurement of the pole piece elongation and improving detection accuracy and efficiency.

[0008] In some embodiments, the controller is further configured to process data on the number of rotations of the inlet and outlet rollers to obtain inlet displacement and outlet displacement. During the step of calculating the elongation of the pole piece during the pole piece rolling process, the controller is specifically configured to substitute the inlet displacement and outlet displacement into a preset formula to calculate the elongation; wherein the preset formula includes: elongation = (outlet displacement - inlet displacement) / inlet displacement. This embodiment of the present application utilizes a rolling device comprising a roller, a roller, a displacement sensor, and a controller to measure the elongation of the pole piece after rolling. The inlet and outlet encoders mounted on the rollers record the number of rotations of the inlet and outlet rollers driven by the pole piece before and after rolling. The controller converts the number of rotations into length or displacement and substitutes this into the preset formula to quickly calculate the pole piece's elongation. This eliminates the need for manual operation, reduces labor consumption, and significantly improves detection efficiency and accuracy.

[0009] In some embodiments, the entry displacement is equal to the product of the number of rotations of the entry roller and the single-turn length of the entry encoder; the exit displacement is equal to the product of the number of rotations of the exit roller and the single-turn length of the exit encoder. In this embodiment of the present application, a rolling device comprising a roller, a roller, a displacement sensor, and a controller is provided to test the elongation of a pole piece after rolling. The product of the number of rotations recorded by the entry encoder and the exit encoder mounted on the roller and the fixed single-turn length of the encoder can be directly converted into the entry and exit lengths or displacements. Substituting this into a preset formula, the pole piece elongation can be quickly calculated, thereby achieving online automatic measurement of the pole piece elongation and improving detection accuracy and efficiency.

[0010] In some embodiments, the line connecting the positions of the inlet and outlet rollers is arranged at a preset angle to the horizontal on both sides of the central axis of the roller, and the height of the inlet roller is higher than the height of the outlet roller; wherein the preset angle ranges from 0° to 45°. The present embodiment of the application is used to test the elongation of the electrode after rolling by providing a rolling device comprising rollers, rollers, displacement sensors, and a controller, wherein the rollers include an inlet roller and an outlet roller, and the line connecting the positions of the inlet and outlet rollers along the electrode conveying direction forms an angle of 0° to 45° with the horizontal plane, facilitating the conveyance of the electrode under the action of gravity without the need for manual operation, thereby reducing manpower consumption and improving detection efficiency.

[0011] In some embodiments, the entry and exit rollers are both positioned at a predetermined distance from the roller on either side of the central axis of the roller, and the entry rollers are positioned closer than the exit rollers. In this embodiment of the present application, the entry rollers are positioned closer than the exit rollers, which can reduce errors recorded by an entry encoder mounted on the entry rollers. This allows the entry encoder to more quickly and accurately record the number of revolutions of the rollers or the length of travel of the unextended pole piece before the pole piece is rolled, thereby improving detection accuracy and efficiency.

[0012] In some embodiments, the preset distance ranges from 1000 mm to 5000 mm (inclusive). In this embodiment, a rolling device comprising a roller, a pass roller, a displacement sensor, and a controller is provided to test the elongation of a pole piece after rolling. The horizontal distance between the pass roller and the rolling device ranges from 1000 mm to 5000 mm, allowing the installation position of the pass roller to be adjusted. Adjusting this distance can adjust or improve the accuracy of the input encoder recording, providing convenience and improved practicality.

[0013] In the second aspect, an embodiment of the present application provides a roller press, which includes: an unwinding mechanism, a rolling mechanism, and a winding mechanism; the unwinding mechanism, the rolling mechanism, and the winding mechanism are respectively arranged according to the direction of pole piece rolling and conveying; the rolling mechanism adopts the above-mentioned pole piece rolling device.

[0014] In the technical scheme of the embodiment of the application, the roll press provided with the rolling mechanism including the rolling roller, the passing roller, the displacement sensor and the controller can realize online automatic measurement of the elongation of the pole piece while the pole piece is rolled, and can be compatible with online automatic measurement of pole pieces of different models and sizes, thereby improving the practicability of the roll press, the accuracy and efficiency of the elongation detection.

[0015] In a third aspect, the embodiment of the application provides a rolling method, which is applied to the device and includes: rolling the incoming material through the rolling roller; recording the incoming displacement and outgoing displacement of the passing roller when the passing roller rotates through the displacement sensor; and calculating the elongation of the incoming material in the rolling process of the incoming material through the controller according to the incoming displacement and the outgoing displacement.

[0016] In the technical scheme of the embodiment of the application, the displacement sensor installed on the passing roller records the incoming displacement and the outgoing displacement of the passing roller before and after the incoming material is rolled by the rolling roller, and the controller can quickly calculate the elongation of the incoming material by substituting the incoming displacement and the outgoing displacement into a preset formula after processing, without manual operation, thereby greatly improving the detection efficiency and the detection accuracy while reducing the labor consumption.

[0017] In a fourth aspect, the embodiment of the application further provides an electronic device including a processor and a memory, wherein the memory stores machine readable instructions executable by the processor, and when the electronic device is running, the machine readable instructions are executed by the processor to perform the steps of the method.

[0018] In a fifth aspect, the embodiment of the application provides a computer readable storage medium, wherein the storage medium stores a computer program, and when the computer program is run by a processor, the steps of the method are executed.

[0019] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the following embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiment of the application, the following will briefly introduce the drawings needed to be used in the embodiment of the application. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 A structural schematic diagram of a rolling device provided by the embodiment of the application is shown in the figure.

[0022] Figure 2A side view of a rolling device provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of the functional modules of a roller press provided in an embodiment of the present application;

[0024] Figure 4 A flow chart of a rolling method provided in an embodiment of the present application;

[0025] Figure 5 A block diagram of an electronic device providing a rolling device according to an embodiment of the present application.

[0026] Icons: 01-rolling device; 10-roller; 11-upper roller; 12-lower roller; 21-inlet roller; 22-outlet roller; 23-inlet encoder; 24-outlet encoder; 30-incoming material; 50-pole piece; 300-electronic device; 311-memory; 312-storage controller; 313-processor; 314-peripheral interface; 315-input and output unit; 316-display unit. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work fall within the scope of protection of the present application.

[0028] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. The terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. The terms "first", "second", etc. are used only to distinguish descriptions and are not to be understood as indicating or implying relative importance.

[0029] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment. One of ordinary skill in the art will readily recognize from the disclosure herein a wide number of variations, alternatives, and equivalents in the application that fall within the scope of the application. All such variations and equivalents are intended to be encompassed by the application.

[0030] In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0031] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0032] Before introducing the embodiments of the present application, first briefly introduce several technical concepts involved.

[0033] Pole piece rolling: an important link in the production process of a lithium ion battery, the purpose of which is to obtain a pole piece meeting the design requirements. In order to improve the consistency of the density and thickness of the surface material of the battery pole piece, the positive and negative pole pieces must be rolled after the coating process, which is referred to as battery pole piece rolling. The process of battery pole piece rolling is that the battery pole piece is pulled into the rotating roller between the roller and the battery pole piece by the friction force generated therebetween, and the battery pole piece is deformed under pressure. Rolling is a very necessary process: after coating and drying, the peeling strength of the active material and the current collector foil is very low, at which time it needs to be rolled to enhance the adhesion strength of the active material and the foil, so as to prevent peeling during electrolyte soaking and battery use; at the same time, pole piece rolling can compress the volume of the battery, improve the energy density of the battery, reduce the porosity between the active material, conductive agent, and binder in the pole piece, and reduce the resistance of the battery to improve the performance of the battery.

[0034] Rolling process: After the coated electrode is fixed to the unwinding mechanism, the electrode is correctly passed through the gap between the two rollers and connected to the winding system; after the rolling mode is turned on, the motor drives the upper and lower rollers to rotate simultaneously, and the winding mechanism pulls the electrode to steadily pass through the rolling gap between the rollers, and is finally pressed to the required compaction density. The process of rolling the battery electrode is a process in which the battery electrode is pulled into the gap between the rotating rollers by the friction generated between the rollers and the battery electrode, and the battery electrode is compressed and deformed. The rolling of battery electrodes is different from the rolling of steel blocks. The process of rolling steel is a process in which iron molecules extend longitudinally and widen laterally, and their density does not change during the rolling process; the rolling of battery electrodes is a process in which the battery materials on the positive and negative plates are compacted. When rolling the battery electrode, the rolling force should not be too large or too small, and should be consistent with the characteristics of the battery electrode material.

[0035] The inventors of this application noted that the pole piece elongation refers to the process of rolling the pole piece after the lithium-ion battery is coated to make it thinner and the battery smaller. After rolling, the pole piece becomes thinner and wider and longer at the same time, and the ratio of this increase in width and length is the elongation. In the existing method, the pole piece elongation is detected by rolling the pole piece. A first speed measuring component for measuring the speed of the pole piece before rolling and a second speed measuring component for measuring the speed of the pole piece after rolling are provided in the rolling conveyor line. The rolling conveyor line includes a conveyor roller and a pressure roller. The conveyor roller conveys the pole piece strip, and the pressure roller corresponds to the position of the conveyor roller and is capable of rolling the pole piece.

[0036] The detection method steps may be:

[0037] S1, the conveyor roller continuously conveys the electrode material strip, and the first speed meter measures the speed of the electrode material strip before rolling to obtain the speed v1;

[0038] S2. The electrode strip is stretched during the conveying process when it is rolled by the pressing roller;

[0039] S3, the second speed meter measures the speed of the pole piece tape that has been stretched to obtain the speed v2;

[0040] S4. Use the formula m=(v2-v1) / v1 to solve the pole piece elongation m;

[0041] Where m is the electrode elongation, v1 is the electrode material strip running speed before rolling, and v2 is the electrode material strip running speed after rolling. The above detection method calculates the electrode elongation by detecting the speed before and after rolling, but the accuracy is low and the error is large. In view of this, the embodiment of the present application provides a rolling device as described below.

[0042] See also Figure 1 , Figure 1The following is a module function diagram of a rolling device 01 provided in an embodiment of the present application. The embodiment of the present application is explained in detail below. The rolling device 01 includes: a roller 10, a roller, a displacement sensor and a controller; the roller includes: an inlet roller 21 and an outlet roller 22;

[0043] The entry and exit rollers 21, 22 are respectively arranged on both sides of the central axis of the roller 10 along the rolling and conveying direction of the incoming material 30; displacement sensors are provided on the entry and exit rollers 21, 22; the displacement sensors are electrically connected to the controller; the roller 10 is used to roll the incoming material 30; the displacement sensors are used to record the entry displacement and exit displacement when the entry and exit rollers 21, 22 rotate; the controller is used to calculate the elongation of the incoming material 30 during the rolling process of the incoming material 30 based on the entry displacement and exit displacement.

[0044] Exemplarily, the roller 10 may be composed of three parts: a roller body, a roller neck and a shaft head. The roller body is the middle part of the roller 10 that actually participates in rolling the metal, and it generally has a smooth cylindrical or grooved surface; the roller neck is installed in the bearing, and transmits the rolling force to the frame through the bearing seat and the pressing device; the transmission end shaft head is connected to the gear seat through a connecting shaft, and transmits the rotational torque of the motor to the roller 10; wherein the roller 10 can be arranged in the form of two rollers, three rollers, four rollers or multiple rollers; optionally: the roller 10 may include an upper roller 11 and a lower roller 12 arranged in a relative extrusion arrangement, and there is an extrusion gap between the upper roller 11 and the lower roller 12 that can accommodate the incoming material 30.

[0045] The roller can be composed of two parts: a roller and a roller shaft. The roller is sleeved on the roller shaft and is always coaxial with the roller shaft. During the rolling process of the incoming material 30, the strip or roll of the incoming material 30 contacts the outer surface of the roller and can be driven to rotate around the central roller shaft when the incoming material 30 is wound by the winder or unwound by the unwinder.

[0046] The incoming materials 30 may be: some raw materials, materials, auxiliary materials, parts, components, accessories and packaging materials that come from the raw materials transferred to other places for processing and production during the production process of products and commodities; for example: pole pieces, prefabricated material incoming materials, original material incoming materials, prepared device incoming materials, etc. The following embodiments are mostly introduced using pole pieces as an example.

[0047] Controller ( Figure 1 (not directly shown) may be a PLC controller (Programmable logic controller) of the roller press, which uses a type of programmable memory to store programs for performing logical operations and sequential control, receiving user-oriented instructions such as timing, counting and arithmetic operations, and controlling the production process of the roller press of the incoming material 30 through digital or analog input / output.

[0048] Displacement sensor ( Figure 1 The displacement sensor (not directly shown in the figure) can be: used to measure the forward and backward displacement of the incoming material 30 caused by the incoming material 30 driving the roller to rotate around the central roller axis during the process of being rolled by the roller 10, such as the incoming displacement and the outgoing displacement generated by the incoming roller 21 and the outgoing roller 22 respectively; optionally: the displacement sensor can use an encoder to measure the displacement position or speed of the roller during rotation, and convert it into an electrical signal to send to the controller for determining the position, count, speed or direction.

[0049] Optionally, the incoming material 30 is a pole piece, such as a strip or coil of pole pieces; the roller 10 may include an upper roller 11 and a lower roller 12 arranged to press against each other. The rollers include an inlet roller 21 and an outlet roller 22 for pulling or conveying the strip or coil of pole pieces into and out of the roller 10. The rollers may be positioned on either side of the central roller axis of the roller 10 along the direction of rolling and conveying the pole pieces. Displacement sensors (e.g., sensors) are provided on the inlet roller 21 and the outlet roller 22 to record the inlet displacement and the outlet displacement, respectively. Figure 1 、 Figure 2 The input encoder 23 and the output encoder 24 are on the input and output rollers 21 and 22 respectively; when the pole piece strip is continuously conveyed, the displacement sensor on the input roller 21 measures the displacement of the pole piece strip before rolling to obtain the input displacement; the pole piece strip is stretched when it is rolled by the roller 10 during the conveying process; the displacement sensor on the output roller 22 measures the displacement of the pole piece strip that has stretched to obtain the output displacement; the controller uses a preset calculation formula to solve the pole piece elongation rate based on the two parameters obtained.

[0050] A rolling device 01 consisting of a roller 10, a passing roller, a displacement sensor and a controller is provided to test the elongation of the incoming material 30 after rolling. The displacement sensor on the passing roller is used to record in real time the entry displacement and exit displacement of the incoming material 30 before and after being rolled by the roller 10. The controller calculates in real time the elongation of the incoming material 30 based on the entry displacement and exit displacement, thereby realizing online automatic measurement of the elongation of the incoming material 30. The device is compatible with online automatic measurement of incoming materials 30 of different models and sizes, thereby reducing manual measurement manpower and improving practicality, detection accuracy and efficiency.

[0051] In one embodiment, the incoming material 30 includes: a pole piece 50; the displacement sensor includes: an input encoder 23 and an output encoder 24; the input encoder 23 is rotatably provided on the axial end surface of the input roller 21; the output encoder 24 is rotatably provided on the axial end surface of the output roller 22; the input encoder 23 is used to record the number of rotations of the input roller 21 during rotation; the output encoder 24 is used to record the number of rotations of the output roller 22 during rotation; the controller is specifically used to calculate the elongation rate of the pole piece 50 during the rolling process of the pole piece 50 according to the number of rotations of the input roller 21 and the number of rotations of the output roller 22.

[0052] For example, the displacement sensor may employ an encoder to measure information such as the displacement position or speed of the rotating roller, converting the information into an electrical signal and transmitting it to the controller for determining position, count, speed, or direction. Specifically, the displacement sensor may include an input encoder 23 and an output encoder 24. An encoder is a device that compiles and converts signals (such as bit streams) or data into a signal form that can be used for communication, transmission, and storage. The encoder converts angular or linear displacement into an electrical signal and transmits the electrical signal to a programmable logic controller (PLC) for calculation and processing of the elongation rate.

[0053] Alternatively, as Figure 2 As shown, the strip-shaped pole piece 50 passes through the gap formed by the upper roller 11 and the lower roller 12 (two hollow circles) and contacts the upper surfaces of the inlet and outlet rollers 21 and 22 on either side. Specifically, an inlet encoder 23 and an outlet encoder 24, which record the inlet and outlet displacements, can be located at the center of the end faces of the roller shafts on the same side of the inlet and outlet rollers 21 and 22, respectively. The two encoders can also be located at the center of the end faces of the roller shafts on opposite sides of the inlet and outlet rollers 21 and 22 (not shown). The inlet encoder 23 can rotate with the roller shaft of the inlet roller 21, and the outlet encoder 24 can rotate with the roller shaft of the outlet roller 22. When the pole piece 50 material strip is continuously conveyed, the inlet encoder 23 records the number of revolutions of the inlet roller 21 driven by the pole piece 50 material strip before rolling, and obtains the number of revolutions of the inlet roller 21; the pole piece 50 material strip is rolled by the roller 10 during the conveying process and is stretched; the outlet encoder 24 records the number of revolutions of the outlet roller 22 driven by the pole piece 50 material strip that is stretched, and obtains the number of revolutions of the outlet roller 22; the controller uses a preset calculation formula to solve the elongation rate of the pole piece 50 based on the two parameters obtained.

[0054] A rolling device 01 consisting of a rolling roller 10, a passing roller, a displacement sensor and a controller is provided to test the elongation of the pole piece 50 after rolling. The input encoder 23 and the output encoder 24 installed on the passing roller are used to record the number of revolutions of the input passing roller 21 and the output passing roller 22 driven by the pole piece 50 before and after being rolled by the rolling roller 10. The controller calculates the elongation of the pole piece 50 in real time based on the number of revolutions, thereby realizing online automatic measurement of the elongation of the pole piece 50 and improving detection accuracy and efficiency.

[0055] In one embodiment, the controller is also used to process data on the number of rotations of the entry roller 21 and the exit roller 22 to obtain the entry displacement and the exit displacement; in the step of calculating the elongation of the pole piece 50 during the rolling process of the pole piece 50, the controller is specifically used to: substitute the entry displacement and the exit displacement into a preset formula for calculation to obtain the elongation; wherein the preset formula includes: elongation = (exit displacement - entry displacement) / entry displacement.

[0056] For example, before calculating the elongation, the controller can convert the number of revolutions of the entry roller 21 and the exit roller 22 into entry displacement and exit displacement, i.e., the length or displacement traveled by the pole piece 50 before and after being rolled by the roller 10 during the conveying process. The method of calculating the elongation using speed is converted into a method of calculating length or displacement. For example, the elongation m of the pole piece 50 is solved according to the formula m = (v2 - v1) / v1; where m is the elongation of the pole piece 50, v1 is the tape speed before the pole piece 50 is rolled, and v2 is the tape speed after the pole piece 50 is rolled. Therefore, v1 and v2 can similarly be converted into exit displacement and entry displacement.

[0057] Optionally, an entry encoder 23 is added to the last roller (entry roller 21) of the roller press, and an exit encoder 24 is added to the first roller (exit roller 22) of the roller press. When the rolled pole piece 50 passes through the entry roller 21, the entry encoder 23 cumulatively records the length of the entry pole piece 50. After being rolled by the upper roller 11 and the lower roller 12 of the roller 10, the pole piece 50 passes through the exit roller 22. The encoder of the exit roller 22 cumulatively records the length of the exit pole piece 50. When the pole piece 50 is produced to the set length and cut, the PLC controller of the roller press calculates the elongation rate of the entire roll of pole piece 50, that is, the calculation formula is: elongation rate of the entire roll of pole piece 50 = (total exit length - total entry length) / total entry length, and then the elongation rate of the entire roll of pole piece 50 is obtained.

[0058] The rolling device 01 consisting of a rolling roller 10, a passing roller, a displacement sensor and a controller is used to test the elongation of the pole piece 50 after rolling. The input encoder 23 and the output encoder 24 installed on the passing roller are used to record the number of revolutions of the input passing roller 21 and the output passing roller 22 driven by the pole piece 50 before and after being rolled by the rolling roller 10. The controller converts the number of revolutions into length or displacement and substitutes it into a preset formula to quickly calculate the elongation of the pole piece 50. This method does not require manual operation, reduces manpower consumption and can greatly improve detection efficiency and detection accuracy.

[0059] In one embodiment, the inlet displacement is equal to the product of the number of revolutions of the inlet roller 21 and the single revolution length of the inlet encoder 23 ; the outlet displacement is equal to the product of the number of revolutions of the outlet roller 22 and the single revolution length of the outlet encoder 24 .

[0060] For example, before calculating the elongation, the controller may convert the number of revolutions of the inlet roller 21 and the outlet roller 22 into inlet displacement and outlet displacement, i.e., the length or displacement traveled by the pole piece 50 before and after being rolled by the roller 10 during the conveying process. The inlet displacement is calculated by multiplying the number of revolutions of the inlet roller 21 before rolling by the length of a single revolution of the inlet encoder 23. The length of a single revolution of the inlet encoder 23 is known and a fixed parameter of the inlet encoder 23, which can be directly read or input by the model parameters of the inlet encoder 23. The outlet displacement is calculated by multiplying the number of revolutions of the inlet roller 22 after rolling by the length of a single revolution of the outlet encoder 24. The length of a single revolution of the outlet encoder 24 is known and a fixed parameter of the outlet encoder 24, which can be directly read or input by the model parameters of the outlet encoder 24.

[0061] A rolling device 01 consisting of a roller 10, a passing roller, a displacement sensor and a controller is provided to test the elongation of the pole piece 50 after rolling. The product of the number of rotations recorded by the input encoder 23 and the output encoder 24 installed on the passing roller and the fixed single-circle length of the encoder can be directly converted into the input and output length or displacement. Substituting the product into a preset formula can quickly calculate the elongation of the pole piece 50, thereby realizing online automatic measurement of the elongation of the pole piece 50 and improving detection accuracy and efficiency.

[0062] In one embodiment, the position connecting line of the entry pulley 21 and the exit pulley 22 is arranged on both sides of the central axis of the roller 10 at a preset angle to the horizontal direction, and the position height of the entry pulley 21 is higher than the position height of the exit pulley 22; wherein the preset angle ranges from 0° to 45°.

[0063] For example, Figure 2As shown, the strip-shaped electrode 50 passes through the gap squeezed by the upper roller 11 and the lower roller 12, and contacts the upper surface of the inlet and outlet rollers 21 and 22 on both sides. At this time, the inlet and outlet rollers 21 and 22 are in the same horizontal plane, so the angle between the position line along the conveying direction of the electrode 50 and the horizontal direction is 0°. Since the electrode 50 passes through the entry roller 21 first, then passes through the gap squeezed by the upper roller 11 and the lower roller 12, and finally passes through the exit roller 22 during the rolling process, the position height of the entry roller 21 is higher than that of the exit roller 22, which makes the electrode 50 more easily squeezed by the upper roller 11 and the lower roller 12 under the action of gravity. At this time, the line connecting the positions of the entry roller 21 and the exit roller 22 along the conveying direction of the electrode 50 is a slant line. The angle between the slant line and the horizontal direction can generally be set in the range of 0 to 45°, for example: 10°, 20°, 30°, ..., 45°. This facilitates the conveyance of the electrode 50 and improves the measurement efficiency of the elongation of the electrode 50.

[0064] The rolling device 01 is provided with a roller 10, a passing roller, a displacement sensor and a controller for testing the elongation of the electrode 50 after rolling. The passing roller includes an inlet passing roller 21 and an outlet passing roller 22. The position line of the inlet passing roller 21 and the outlet passing roller 22 along the conveying direction of the electrode 50 forms an angle of 0° to 45° with the horizontal plane, which facilitates the conveyance of the electrode 50 under the action of gravity without manual operation, thereby reducing manpower consumption and improving detection efficiency.

[0065] In one embodiment, the entry pulley 21 and the exit pulley 22 are both located at a preset distance from the roll 10 on both sides of the central axis of the roll 10 , and the entry pulley 21 is located closer than the exit pulley 22 .

[0066] For example, Figure 2 As shown, the strip-shaped pole piece 50 passes through the gap squeezed between the upper roller 11 and the lower roller 12 and contacts the upper surfaces of the inlet and outlet rollers 21 and 22 on both sides. At this time, the inlet and outlet rollers 21 and 22 are in the same horizontal plane, and the horizontal distance between the inlet roller 21 and the roller 10 composed of the upper roller 11 and the lower roller 12 is equal. Because the pole piece 50 first passes through the inlet roller 21, then passes through the gap squeezed between the upper roller 11 and the lower roller 12, and finally passes through the outlet roller 22 during the rolling process, the horizontal distance between the inlet roller 21 and the roller 10 can be slightly closer or smaller than the horizontal distance between the outlet roller 22 and the roller 10.

[0067] Since the ductility characteristics of the pole piece 50 after rolling have been determined, that is, the position of the exit roller 22 arranged on the rear side of the rolling roller 10 is slightly farther or closer, which has little effect on the accuracy of the final ductility calculation, but the entry roller 21 is slightly closer, which can reduce the error recorded by the entry encoder 23 installed on the entry roller 21, so that the entry encoder 23 can record the number of revolutions of the roller before the pole piece 50 is rolled or the length traveled by the unextended pole piece 50 more quickly and accurately, thereby improving the accuracy and efficiency of detection.

[0068] In one embodiment, the preset distance length ranges from 1000 mm to 5000 mm (inclusive).

[0069] For example, the preset distance can be the horizontal distance between the exit roller 22 or the entry roller 21 and the roll 10. Compared to the horizontal distance between the exit roller 22 and the roll 10, the horizontal distance between the entry roller 21 and the roll 10 can be slightly closer or smaller. This can reduce the error recorded by the entry encoder 23 mounted on the entry roller 21, allowing the entry encoder 23 to more quickly and accurately record the number of roller rotations or the length traveled by the unextended pole piece 50 before rolling, thereby improving detection accuracy. However, the horizontal distance between the two can generally be set within a range of 1000 mm to 5000 mm, such as the commonly used values ​​of 1000 mm, 1500 mm, 2000 mm, ..., and 5000 mm.

[0070] The rolling device 01 consisting of a rolling roller 10, a passing roller, a displacement sensor and a controller is used to test the elongation of the pole piece 50 after rolling. The horizontal distance between the passing roller and the rolling roller 10 is in the range of 1000mm to 5000mm, so that the installation position of the passing roller can be adjusted. Adjusting this distance can adjust or improve the accuracy of the recording of the pulling encoder 23, which is convenient and fast and improves practicality.

[0071] See also Figure 3 , Figure 3 A schematic diagram of the functional modules of a roller press provided in an embodiment of the present application, the roller press includes: an unwinding mechanism, a rolling mechanism, and a winding mechanism; the unwinding mechanism, the rolling mechanism, and the winding mechanism are respectively arranged according to the rolling and conveying direction of the electrode 50; the rolling mechanism adopts the above-mentioned electrode 50 rolling device.

[0072] Exemplarily, after the coated roll-shaped pole piece 50 is fixed to the unwinding mechanism, the pole piece 50 is correctly threaded through the rolling gap in the rolling mechanism, and the winding mechanism is connected. After the rolling mode is started, the motor drives the upper and lower rollers of the rolling mechanism to rotate simultaneously, and the winding mechanism pulls the pole piece 50 to steadily pass through the rolling gap, and finally the roll-shaped pole piece 50 is pressed to the required compaction density; at the same time, the rotation of the rolling roller 10 not only generates the extrusion force (rolling force) for rolling the pole piece 50, but also generates the rotating force, which pushes the elongated pole piece 50 to move and drive the over-rollers on both sides of the rolling roller 10 to rotate. The displacement sensor or encoder installed on the over-roller records the in-pulling displacement and out-pulling displacement of the pole piece 50 before and after rolling (before and after elongation), and transmits them to the controller for processing, and the elongation rate is calculated in real time.

[0073] By setting the rolling machine including the rolling mechanism of the rolling roller 10, the over-roller, the displacement sensor and the controller, the on-line automatic measurement of the elongation rate of the pole piece 50 can be realized while the pole piece 50 is rolled, and different models and sizes of the pole piece 50 can be automatically measured online, thereby improving the practicability of the rolling machine, the accuracy and efficiency of the elongation rate detection.

[0074] Please refer to Figure 4 , Figure 4 A flow chart of a rolling method provided by the embodiment of the application. The method comprises steps 100, 120 and 140.

[0075] Step 100: rolling the incoming material by the rolling roller 10;

[0076] Step 120: recording the in-pulling displacement and out-pulling displacement of the in-pulling over-roller 21 and the out-pulling over-roller 22 by the displacement sensor;

[0077] Step 140: calculating the elongation rate of the incoming material in the rolling process of the incoming material by the controller according to the in-pulling displacement and out-pulling displacement.

[0078] For example, the incoming material 30 is a pole piece 50. The displacement sensor can use an encoder to measure the displacement position or speed of the roller during rotation, and convert it into an electrical signal to send to the controller. The displacement sensor here can specifically include: an input encoder 23 and an output encoder 24. An entry encoder 23 is added when the roller 10 presses the last roller (entry roller 21) of the drawing, and an exit encoder 24 is added when the roller presses the first exit roller (exit roller 22). When the rolled pole piece 50 passes through the entry roller 21, the entry encoder 23 cumulatively records the length of the entry pole piece 50 (entry displacement). After being rolled by the upper roller 11 and the lower roller 12 of the roller 10, the pole piece 50 passes through the exit roller 22. The encoder of the exit roller 22 cumulatively records the length of the exit pole piece 50 (exit displacement). When the pole piece 50 is produced to the set length and cut, the PLC controller of the roller press calculates the elongation rate of the entire roll of pole piece 50, that is, the calculation formula: elongation rate of the entire roll of pole piece 50 = (total exit length - total entry length) / total entry length, and then the elongation rate of the entire roll of pole piece 50 is obtained.

[0079] By using the displacement sensor installed on the roller to record the entry displacement and exit displacement of the incoming material 30 before and after being rolled by the roller 10, the controller processes the entry displacement and exit displacement and inputs them into the preset formula to quickly calculate the elongation rate of the incoming material 30. No manual operation is required, which reduces manpower consumption and can greatly improve detection efficiency and detection accuracy.

[0080] See also Figure 5 , Figure 5 3 is a block diagram of an electronic device. The electronic device 300 may include a memory 311, a storage controller 312, a processor 313, a peripheral interface 314, an input and output unit 315, and a display unit 316. It can be understood by those skilled in the art that Figure 5 The structure shown is only for illustration and does not limit the structure of the electronic device 300. For example, the electronic device 300 may further include Figure 5 More or fewer components than shown, or with Figure 5 Different configurations shown.

[0081] The aforementioned memory 311, storage controller 312, processor 313, peripheral interface 314, input / output unit 315, and display unit 316 are electrically connected to each other, either directly or indirectly, to enable data transmission or interaction. For example, these components may be electrically connected to each other via one or more communication buses or signal lines. The aforementioned processor 313 is used to execute the executable modules stored in the memory.

[0082] The memory 311 can be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electric Erasable Programmable Read-Only Memory (EEPROM), etc. The memory 311 is configured to store a program, and the processor 313 executes the program after receiving an execution instruction. The method performed by the electronic device 300 defined by the processes disclosed in any of the embodiments of the present application can be applied to the processor 313 or implemented by the processor 313.

[0083] The processor 313 can be an integrated circuit chip having a signal processing capability. The processor 313 can be a general purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc. The processor 313 can also be a digital signal processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The processor 313 can implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of the present application. The general purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0084] The peripheral interface 314 is configured to couple various input / output devices to the processor 313 and the memory 311. In some embodiments, the peripheral interface 314, the processor 313, and the memory controller 312 can be implemented in a single chip. In other embodiments, they can be implemented by independent chips respectively.

[0085] The input / output unit 315 is configured to provide input data for a user. The input / output unit 315 can be, but is not limited to, a mouse and a keyboard, etc.

[0086] The display unit 316 provides an interactive interface (e.g., a user interface) between the electronic device 300 and the user for the user's reference. In this embodiment, the display unit 316 may be a liquid crystal display or a touch screen display. The liquid crystal display or touch screen display can display the process of the processor executing the program.

[0087] The electronic device 300 in this embodiment can be used to execute each step in each method provided in the embodiments of the present application.

[0088] In addition, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above method embodiment are executed.

[0089] The computer program product of the above method provided in the embodiment of the present application includes a computer-readable storage medium storing program code, and the instructions included in the program code can be used to execute the steps in the above method embodiment. For details, please refer to the above method embodiment, which will not be repeated here.

[0090] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms. The functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0091] It should be noted that if the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the existing technology, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program code.

[0092] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0093] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A rolling device, characterized in that: The device comprises: a roller, a passing roller, a displacement sensor and a controller; The passing rollers include: an inlet passing roller and an outlet passing roller; The inlet and outlet rollers are respectively arranged on both sides of the central axis of the roller along the direction of roller pressure conveying of the incoming material; the displacement sensors are arranged on the inlet and outlet rollers; the displacement sensors are electrically connected to the controller; The rollers are used to roll the incoming materials; the displacement sensors are used to record the incoming displacement and the outgoing displacement of the incoming and outgoing rollers when they rotate; the controller is used to calculate the elongation of the incoming materials during the rolling process based on the incoming displacement and the outgoing displacement; The connecting line between the entry and exit rollers is arranged on both sides of the central axis of the roller at a preset angle to the horizontal direction, and the entry roller is higher than the exit roller; wherein the preset angle ranges from 0 to 45 degrees; The inlet pull-through roller and the outlet pull-through roller are both at a preset distance from the roller and are arranged on both sides of the central axis of the roller, and the position distance of the inlet pull-through roller is closer than the position distance of the outlet pull-through roller.

2. The device according to claim 1, characterized in that in, The incoming material includes a pole piece; the displacement sensor includes an inlet encoder and an outlet encoder; the inlet encoder is rotatably provided on the axial end surface of the inlet roller; the outlet encoder is rotatably provided on the axial end surface of the outlet roller; The inlet encoder is used to record the number of rotations of the inlet roller during the rotation; the outlet encoder is used to record the number of rotations of the outlet roller during the rotation; The controller is specifically configured to calculate the elongation of the pole piece during the pole piece rolling process according to the number of rotations of the inlet pull-through roller and the number of rotations of the outlet pull-through roller.

3. The device according to claim 2, characterized in that The controller is further used to process the data of the number of rotations of the inlet pull-through roller and the outlet pull-through roller to obtain the inlet pull-through displacement and the outlet pull-through displacement; In the step of calculating the elongation of the pole piece during the pole piece rolling process, the controller is specifically configured to: substitute the pull-in displacement and the pull-out displacement into a preset formula for calculation to obtain the elongation; wherein the preset formula includes: Elongation = (exit displacement - entry displacement) / entry displacement.

4. The device according to claim 2, characterized in that in, The inlet displacement is equal to the product of the number of rotations of the inlet roller and the single-turn length of the inlet encoder; the outlet displacement is equal to the product of the number of rotations of the outlet roller and the single-turn length of the outlet encoder.

5. The device according to claim 1, characterized in that in, The preset distance length ranges from 1000 mm to 5000 mm.

6. A roller press, characterized in that: The roller press includes: an unwinding mechanism, a rolling mechanism, and a winding mechanism; the unwinding mechanism, the rolling mechanism, and the winding mechanism are respectively arranged according to the direction of electrode rolling and conveying; the rolling mechanism adopts the rolling device described in any one of claims 1-5.

7. A rolling method, characterized in that: The method is applied to the rolling device according to any one of claims 1 to 5, and the method comprises: Roll the incoming material through rollers; The displacement sensor is used to record the entry displacement and the exit displacement of the entry roller and the exit roller when they rotate; The controller calculates the elongation rate of the incoming material according to the inlet displacement and the outlet displacement during the rolling process of the incoming material.

8. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the rolling method according to claim 7 are implemented.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the rolling method according to claim 7 are executed.

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