Discharging clamp and battery cell winding machine

Abstract

The utility model relates to a discharging clamp and a battery core winding machine, the discharging clamp comprises a support frame, the support frame is provided with two limiting clamps which are symmetrically arranged, at least one limiting clamp can move to enable the two limiting clamps to be close to or far away from each other, and the opposite sides of the two limiting clamps are provided with limiting grooves; a limiting groove is formed in the supporting frame and used for clamping a battery winding cell, and a detection mechanism is further arranged on the supporting frame and used for measuring the diameter of the battery winding cell. According to the blanking clamp, through rapid adjustment and accurate measurement, the production efficiency of battery winding cells is improved, the production process of the cell winding machine is convenient to optimize, and in addition, through the adjustable design of the limiting clamp, the blanking clamp can be suitable for battery winding cells of various specifications.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery winding cell production equipment, in particular to a blanking clamp and a cell winding machine. BACKGROUND

[0002] In the existing patent, the blanking clamp of the cylindrical battery winding machine adopts an arc surface set as an elliptical arc groove, and the inner diameter of the elliptical arc groove is adjusted to adapt to winding cores of different sizes and improve the application range of the blanking clamp, but the battery winding diameter cannot be measured.

[0003] Whether it is a cell product or a trial winding cell product, it needs to go through winding processing, and there may be some errors in the winding process. Therefore, online measurement and identification of cylindrical winding cores are necessary, which can not only reduce the time of manual measurement and judgment, but also facilitate the collection of winding data of the cell. Therefore, a new type of blanking clamp for a cell winding machine is urgently needed. CONTENT OF THE INVENTION

[0004] The present application provides a blanking clamp to solve the problem of being unable to automatically measure the diameter of the battery winding cell.

[0005] In the first aspect, the present application provides a blanking clamp, which comprises a support frame, two symmetrically arranged limiting clamps are arranged on the support frame, at least one of the limiting clamps is movable to make the two limiting clamps close to or away from each other, a limiting groove is arranged on the opposite side of the two limiting clamps, the limiting groove is used for clamping a battery winding cell, a detection mechanism is further arranged on the support frame, and the detection mechanism is used for measuring the diameter of the battery winding cell.

[0006] According to the blanking clamp of the present application, the detection mechanism comprises at least one of an image processing sensor, a laser ranging sensor and an ultrasonic sensor.

[0007] Optionally, the detection mechanism is configured as an image processing sensor, and the image processing sensor is opposite to one end of the axial direction of the limiting groove.

[0008] Optionally, the blanking clamp further comprises a moving mechanism, the moving mechanism is connected with the detection mechanism, and the moving mechanism can drive the detection mechanism to move to the center line of symmetry of the two limiting clamps.

[0009] Optionally, the blanking clamp further comprises:

[0010] A position sensor is arranged on one of the limiting clamps, and the position sensor is used for detecting the position of the other limiting clamp.

[0011] A control module is electrically connected with the position sensor and the moving mechanism.

[0012] According to the blanking clamp of the present application, the support frame is provided with a driving part and a transmission assembly, the driving part, the transmission assembly and one of the limiting clamps are sequentially transmissionally connected, and the other limiting clamp is fixedly arranged on the support frame.

[0013] Optionally, the limiting clamp comprises a body part, at least two clamping jaws are arranged on both sides of the body part in the radial direction, and the at least two clamping jaws are distributed in the axial direction of the limiting clamp.

[0014] Optionally, the clamping jaw and the body part are hinged.

[0015] Optionally, the contact surfaces of the clamping jaw and the body part and the battery winding cell are all arranged as planes.

[0016] In the second aspect, the present application provides an electric cell winding machine comprising the above blanking clamp.

[0017] Compared with the prior art, the above technical scheme provided by the present application has the following advantages:

[0018] The two symmetrical limiting clamps of the blanking clamp provided by the present application can uniformly clamp the battery winding cell, ensuring the stability and safety of the battery during the clamping process. The movable design of at least one limiting clamp enables the clamp to adapt to battery winding cells of different diameters. By adjusting the distance of the clamp, the battery winding cells of different sizes can be adapted. The limiting groove provides a fixed clamping position for the battery winding cell, avoiding movement or falling of the battery winding cell during processing. The detection mechanism is used to measure the diameter of the battery winding cell, so that the size information of the battery winding cell can be fed back in real time. The battery winding cells that do not meet the standard are screened, so that subsequent marking can be returned to work or rejected, improving the efficiency of product qualification inspection. Therefore, through rapid adjustment and accurate measurement, the production efficiency of the battery winding cell is improved, and the production process is optimized. In addition, through the adjustable design of the limiting clamp, it can be applied to battery winding cells of various cylindrical specifications. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0021] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0022] Figure 1 A perspective view of a feeding clamp provided in an embodiment of this application;

[0023] Figure 2 A top view of a feeding clamp provided in an embodiment of this application;

[0024] Figure 3 This is a side view of a feeding clamp provided in an embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] Support frame 10, limit clamp 11, main body 111, gripper 112, detection mechanism 20, drive unit 30, battery winding cell 2. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0029] For the convenience of description, spatial relative terms can be used in the specification to describe the relative position relationship or movement condition of one element or feature relative to another element or feature as shown in the drawings, such as "internal", "external", "inner side", "outer side", "under", "below", "upper", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "above" another element or feature. Therefore, the example term "below" can include both the upper and lower positions. The device can be additionally oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used in the specification are interpreted accordingly.

[0030] As shown in Figure 1 and Figure 2 The blanking clamp according to the embodiment of the application comprises a support frame 10, two symmetrical limiting clamps 11 are arranged on the support frame 10, at least one limiting clamp 11 is movable to make the two limiting clamps 11 close or away from each other, a limiting groove is arranged on the opposite side of the two limiting clamps 11, the limiting groove is used for clamping the battery winding cell 2, and a detection mechanism 20 is further arranged on the support frame 10, the detection mechanism 20 is used for measuring the diameter of the battery winding cell 2.

[0031] In detail, the two symmetrical limiting clamps 11 can realize uniform clamping of the battery winding cell 2, and ensure the stability and safety of the battery winding cell 2 in the clamping process. The movable design of at least one limiting clamp 11 enables the clamp to adapt to battery winding cells 2 of different diameters. By adjusting the distance of the clamp, battery winding cells 2 of different sizes can be adapted. The limiting groove provides a fixed clamping position for the battery winding cell 2, avoiding movement or falling of the battery winding cell 2 during processing. The detection mechanism 20 is used for measuring the diameter of the battery winding cell 2, so that the size information of the battery winding cell 2 can be fed back in real time. Battery winding cells 2 that do not meet the standard are screened out, so that subsequent marking can be carried out for rework or rejection, and the efficiency of product qualification inspection is improved.

[0032] It should be noted that the detection mechanism 20 can be arranged at one end or side of the axial direction of the limiting clamp 11, so as to facilitate the diameter measurement of the battery winding cell 2 clamped between the two limiting clamps 11. In order to improve the accuracy of measurement, the detection mechanism 20 should be arranged opposite to the limiting clamp 11, so as to ensure that the detection mechanism 20 can accurately contact the surface of the battery winding cell 2 for measurement after the clamping action is completed.

[0033] The limiting clip 11 can be provided in a U-shaped, L-shaped or other shape suitable for clamping the battery winding cell 2. The U-shaped clamping can better surround the battery winding cell 2, and the L-shaped clamping can provide side support. The inner width and inner height of the limiting clip 11 should be set according to the diameter and length of the battery winding cell 2. Generally, the inner width should be slightly larger than the diameter of the battery winding cell 2 to facilitate placement and removal, but should not be too large to prevent the battery winding cell 2 from loosening during clamping.

[0034] The limiting clip 11 can be made of wear-resistant and heat-resistant materials such as plastic or metal alloy to improve its durability and stability.

[0035] At least one limiting clip 11 can be moved, which can include the following operation modes: by rotating the handle or sliding the lever, the user can manually adjust the distance of the limiting clip 11 to make it closer or farther; using an electric motor or a sliding rod, the user can control the movement of the limiting clip 11 through a button or switch to provide more accurate adjustment; using a pneumatic cylinder or hydraulic device can achieve stronger clamping and release, suitable for high-efficiency automated production lines.

[0036] The detection mechanism 20 can use photoelectric sensors, laser range finders or mechanical measuring devices to measure the diameter of the battery winding cell 2 in real time.

[0037] According to the blanking clip of the embodiment of the application, the production efficiency of the battery winding cell 2 is improved by rapid adjustment and accurate measurement, and the production process is optimized. In addition, through the adjustable design of the limiting clip 11, it can be applied to various specifications of cylindrical battery winding cells 2.

[0038] According to the blanking clip of the embodiment of the application, the detection mechanism 20 includes at least one of an image processing sensor, a laser ranging sensor and an ultrasonic sensor.

[0039] In detail, the principle of measuring diameter by image processing sensor is mainly based on image processing technology and computer vision. First, use a camera or other image sensor to take a picture of the target object, ensuring that the image is clear and suitable for subsequent processing; pre-process the acquired image, including denoising, contrast enhancement and grayscale, etc., to improve image quality and facilitate subsequent analysis; use edge detection algorithms such as Canny edge detection and Sobel operator to identify the edges of the object. By detecting the edges, the outline of the object can be found, and the outline of the object can be extracted from the edge image. Common methods include contour tracking algorithms. Then, the diameter is measured, including the following algorithms:

[0040] Closest point distance method: the distance between the two farthest points on the contour is calculated to estimate the diameter;

[0041] Minimum Circumscribed Circle: Calculate the diameter of the minimum circumscribed circle of a given contour, which represents the diameter of the object;

[0042] Other geometric features: Use the geometric features of the object, combined with the method of shape analysis, to extract the diameter information.

[0043] After obtaining the actual physical diameter, geometric calibration is needed, that is, to convert the image coordinate system to the physical coordinate system; finally, the measured diameter information is output.

[0044] The main principle of laser ranging sensor measuring diameter is: the laser ranging sensor emits a laser beam, which is usually perpendicular to the measured object. After the laser beam irradiates the surface of the measured object, part of the beam will be reflected back by the object surface. The receiver inside the laser ranging sensor receives the reflected laser beam. The laser ranging sensor calculates the time from emission to reception of the laser beam. The speed of light can be used to calculate the distance between the laser ranging sensor and the surface of the battery winding cell 2. By measuring at different angles or different positions, multiple distance data of the battery winding cell 2 can be obtained. Combined with these data, the diameters of multiple positions of the battery winding cell 2 can be calculated, and the average value can be calculated.

[0045] The principle of ultrasonic sensor measuring diameter is: by emitting high-frequency sound waves (usually between 40-45 kHz) to measure the distance between the two ends of the battery winding cell 2, the ultrasonic sensor receives the reflected wave returned from the surface of the battery winding cell 2, and can calculate the time difference between the emitted wave and the received wave. According to the known speed of sound and time difference, the distance between the surface of the battery winding cell 2 and the sensor can be calculated. If the sensor and the center of the battery winding cell 2 are on the same horizontal line, the maximum distance and the minimum distance obtained by two measurements can be used to calculate the diameter. The maximum distance is the distance from the ultrasonic sensor to the farthest point on the circumference, and the minimum distance is the distance to the nearest point. The difference between the two is the diameter of the circle.

[0046] In some embodiments, the detection mechanism 20 is configured as an image processing sensor opposite to one end of the axial direction of the limiting groove.

[0047] Specifically, the image processing sensor is opposite to one end of the axial direction of the limiting groove, and the image processing sensor can capture the slight changes on the surface of the battery winding core 2, thereby providing more accurate diameter measurement results. Since the image processing sensor is opposite to one end of the axial direction of the limiting groove, real-time control of the diameter of the battery winding core 2 can be realized, and any deviation in the production process can be found and adjusted in time. Such a configuration can make the measurement process more automated, reduce the possibility of manual intervention, and improve production efficiency. By recording the data of each measurement, a complete production data chain can be established, which facilitates subsequent quality traceability and problem analysis. Compared with traditional manual measurement, the image processing sensor can provide more objective and consistent measurement results.

[0048] As shown in Figure 1 and Figure 2 In some embodiments, the blanking clamp further comprises a moving mechanism, the moving mechanism is connected with the detection mechanism 20, and the moving mechanism can drive the detection mechanism 20 to move to the center line of symmetry of the two limiting clamps 11.

[0049] In detail, when the image measurement sensor is located on the center line of symmetry of the two limiting clamps 11, the distances between the image measurement sensor and the two ends of the lithium battery winding core 2 to be measured are the same, which can ensure that the edge image information of the battery winding core 2 obtained by the image measurement sensor is accurate and consistent, and avoid measurement errors caused by uneven distances, thereby ensuring the accuracy of the measurement results. For example, if the image measurement sensor is not on the center line of symmetry, the edge image near one side may be enlarged or reduced, thereby affecting the actual measurement value of the diameter of the battery winding core 2. At the same time, this can simplify the measurement process, and the position of the image measurement sensor is fixed on the center line of symmetry of the battery winding core 2, which can ensure that the position of the image measurement sensor is fixed and determined, and the operator does not need to repeatedly adjust the position and angle of the image measurement sensor. The center of the winding needle of the battery winding core 2 is used as a reference for positioning.

[0050] In some embodiments, the blanking clamp further comprises a position sensor and a control module. Specifically, the position sensor is arranged on one of the limiting clamps 11, and the position sensor is used to detect the position of the other limiting clamp 11; the position sensor and the moving mechanism are in electrical conduction with the control module.

[0051] It can be understood that, in order to more accurately adjust the position of the image measuring sensor, a position sensor can be arranged, which is responsible for detecting and feeding back the position information of the other limit clamp 11. The position sensor can be of various types, such as inductive, capacitive, photoelectric or magnetic induction. The moving mechanism driving the detection mechanism 20 to move can be electric (such as a servo motor), pneumatic or hydraulic. The moving mechanism needs to be accurately controlled to match the feedback of the position sensor. The control module is responsible for receiving the signal of the position sensor, adjusting the operation of the moving mechanism according to the preset program or algorithm, so as to achieve the required positioning accuracy. The control module can include a microprocessor, a logic circuit and an interface circuit, etc.

[0052] That is, after the limit clamp 11 is moved to the position, the position of the limit clamp 11 is measured by the position sensor, so as to position the center line of symmetry of the two limit clamps 11, facilitating accurate positioning and alignment of the image sensor by the moving mechanism.

[0053] As shown in Figure 1 and Figure 3 , according to the blanking clamp of the embodiment of the present application, the support frame 10 is provided with a driving part 20 and a transmission assembly. The driving part 20, the transmission assembly and one of the limit clamps 11 are sequentially transmissionally connected, and the other limit clamp 11 is fixedly arranged on the support frame 10.

[0054] It can be understood that the driving part 20 is used to provide power for the movement of the limit clamp 11. The driving part 20 can usually be arranged as a motor or a hydraulic motor. The transmission assembly is used to transmit the power of the driving part 20 to the limit clamp 11, so as to drive the limit clamp 11 to move according to the predetermined movement track. The transmission assembly can be a chain, a gear, a belt and a cam, etc. Different transmission modes can be selected according to the requirements. By adjusting the parameters of the transmission assembly, such as the gear ratio, the belt tension and the length of the connecting rod, etc., the movement speed and position of the limit clamp 11 can be accurately controlled. That is, one limit clamp 11 can move, which is convenient for adapting to battery winding cores 2 of different sizes and shapes, and improves the universality of the equipment. At the same time, the limit clamp 11 can be finely adjusted according to the specific structure of the battery winding core 2, so as to facilitate the battery winding core 2 to be in the best position during the clamping process, and reduce the damage risk caused by improper position. The other limit clamp 11 is fixed, which is convenient for positioning the battery winding core 2 to be clamped, so as to provide a stable fulcrum for the battery winding core 2, preventing the battery winding core 2 from sliding or rotating during the operation. Therefore, the combination of one movable limit clamp 11 and one fixed limit clamp 11 forms a double protection mechanism. Even when the moving limit member adjusts the position, the battery winding core 2 can also remain stable to avoid accidental falling or collision.

[0055] In addition, it should be noted that the combination of one movable limiting clamp 11 and one fixed limiting clamp 11 can also adapt to special battery winding cells 2 of different specifications and shapes, such as flat battery winding cells 2 or special-shaped battery winding cells 2, and can also be applied to new battery winding cells 2 that may appear in the future, facilitating upgrading and modification.

[0056] As shown in Figure 1 and Figure 3 In some embodiments, the limiting clamp 11 includes a body part 111, and at least two clamping jaws 112 are arranged on both sides of the body part 111 in the radial direction and are spaced apart along the axial direction of the limiting clamp 11.

[0057] In detail, the clamping jaw 112 can expose the surface of the battery winding cell 2 as much as possible while maintaining the clamping of the battery winding cell 2, which is convenient for measuring the diameter of the battery winding cell 2. At the same time, the clamping jaw 112 can expose the surface of the battery winding cell 2 while providing stable support and fixation for the battery winding cell 2, ensuring that the battery winding cell 2 does not move or tilt during measurement, reducing measurement error and improving the accuracy of measurement results. At the same time, the clamping jaw 112 can effectively avoid scratching or damaging the surface of the battery winding cell 2. Through appropriate clamping force and shape setting, the clamping jaw 112 can be evenly distributed on the surface of the battery winding cell 2, reducing the pressure on the battery winding cell 2 and thus maintaining the integrity of the battery winding cell 2. At the same time, the clamping jaw 112 can be adjusted as needed to adapt to battery winding cells 2 of different sizes. By changing the position or spacing of the clamping jaw 112, battery winding cells 2 of different diameters can be measured, thereby improving the flexibility and applicability of the blanking clamp. The at least two clamping jaws 112 are spaced apart along the axial direction of the limiting clamp 11, which can improve the reliability of the fixation of the battery winding cell 2. Specifically, there can be two clamping jaws 112, three clamping jaws 112, and four clamping jaws 112, etc.

[0058] In some embodiments, the clamping jaw 112 is hinged to the body part 111.

[0059] Specifically, the articulation of the clamping jaw 112 with the body part 111 can increase the flexibility of the material cutting clamp, so that the clamping jaw 112 can better adapt to battery winding cell 2 of different sizes and shapes, and the clamping jaw 112 can be adjusted as needed to provide better clamping effect. Through the articulated connection, the position and angle of the clamping jaw 112 can be adaptively adjusted according to the battery winding cell 2 to adapt to battery winding cell 2 of different diameters, so that the clamping jaw 112 can firmly clamp the battery winding cell 2, in addition, the articulated structure can provide better durability, because the clamping jaw 112 can be rotated through the articulation, reducing the direct force condition, at the same time, the articulated structure makes the operation of the clamping jaw 112 more convenient, the user can adjust the position and angle of the clamping jaw 112 through simple operation to adapt to different battery winding cell 2, so as to improve the work efficiency and reduce the operation time.

[0060] In some embodiments, the contact surfaces of the clamping jaw 112 and the body part 111 with the battery winding cell 2 are both provided as flat surfaces. It can be understood that providing the contact surfaces of the clamping jaw 112 and the body part 111 with the battery winding cell 2 as flat surfaces can not only simplify the structure setting, but also adapt to battery winding cell 2 of different sizes and shapes, and avoid the contact surfaces of the clamping jaw 112 and the body part 111 with the battery winding cell 2 from sliding or falling off.

[0061] The cell winding machine according to the embodiments of the present application comprises the above-described material cutting clamp.

[0062] The cell winding machine according to the embodiments of the present application improves the production efficiency of the cell winding machine through rapid adjustment and accurate measurement, optimizes the production process, and in addition, the adjustable design of the limiting clamp 11 can be applied to battery winding cell 2 of various specifications.

[0063] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are to be construed as containing, comprising, including or having, as set forth herein, and therefore should not be interpreted to exclude additional features, steps, processes, components, members, or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless otherwise specifically noted. It is also to be understood that additional or alternative steps can be employed.

[0064] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example implementations.

[0065] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above-described embodiments are intended to be illustrative, not restrictive, of the scope of the application, which is set by the following claims.

Claims

1. A blank holder, characterized in that, The support frame is provided with two symmetrical limiting clamps, at least one of which is movable to make the two limiting clamps close or away from each other, and the opposite side of the two limiting clamps is provided with a limiting slot for clamping the battery winding cell, and the support frame is further provided with a detection mechanism for measuring the diameter of the battery winding cell.

2. The blank holder according to claim 1, characterized in that The detection mechanism includes at least one of an image processing sensor, a laser ranging sensor and an ultrasonic sensor.

3. The blank holder according to claim 2, wherein The detection mechanism is configured as an image processing sensor opposite to one end of the axial direction of the limiting slot.

4. The blank holder according to claim 3, wherein Further comprising a moving mechanism connected with the detection mechanism, which can drive the detection mechanism to move to the center line of symmetry of the two limiting clamps.

5. The blank holder according to claim 4, wherein Further comprising: a position sensor provided on one of the limiting clamps, which is used to detect the position of the other limiting clamp; a control module, and the position sensor and the moving mechanism are in electrical conduction with the control module.

6. The blank holder of claim 2, wherein, The support frame is provided with a driving part and a transmission assembly, and the driving part, the transmission assembly and one of the limiting clamps are sequentially connected in transmission, and the other limiting clamp is fixedly provided on the support frame.

7. The blank holder of claim 2, wherein The limiting clamp includes a body part, and at least two clamping jaws are respectively arranged on both sides of the body part in the radial direction, and the at least two clamping jaws are distributed along the axial direction of the limiting clamp.

8. The blank holder according to claim 7, characterized in that The clamping jaw is hinged with the body part.

9. The blank holder according to claim 7 or 8, characterized in that The contact surface of the clamping jaw and the body part with the battery winding cell is a plane.

10. An electrode core winding machine characterized by comprising: The blanking clamp comprises the blanking clamp according to any one of claims 1-9.

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