Method and device for improving loss of positive electrode end of roll core

Abstract

The invention discloses a method and device for improving loss of a positive electrode end of a roll core. The device comprises a collection machine controller, a collection machine touch screen, a collection machine up-down carrying clamping jaw, a roll core tray, a roll core mold and a mold bearing supporting cup. The collecting machine upper and lower carrying clamping jaws are provided with a coaxiality detection mechanism; the coaxiality detection mechanism and the collection machine touch screen are connected with the input end of the collection machine controller, and the output end of the collection machine controller is connected with the collection machine up-down carrying clamping jaw and the collection machine main power source. The calibration process is added in the original operation process of the winding machine, upper and lower carrying clamping jaws of the collection machine clamp a roll core mold to operate along the periphery of a roll core tray to detect the coaxiality with the roll core tray, and after all the four corners pass calibration, the upper and lower carrying clamping jaws of the collection machine perform the original function of carrying and transferring the roll core to the roll core tray; the roll core can be continuously produced, the situation that the edge of the positive electrode end of the roll core is collided and damaged is avoided, and the product percent of pass and the production efficiency are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery manufacturing, and particularly relates to a method and device for improving the loss of the positive extreme of a wound core during the manufacture of cylindrical batteries. Background Art

[0002] The winding process is a key process in the manufacture of cylindrical batteries and undertakes the important task of forming the wound core. The function of the upper and lower handling jaws in the collection machine part of the winding machine is to transfer the wound core to the tray. Along with the stop and operation of the winding machine table rhythm, it is inevitable that the winding machine table shakes. Although the tray is fixed by a cylinder fixing block, it is difficult to achieve an ideal state in terms of accuracy. With the shaking of the winding machine table, it will shift. In addition, the verticality of the upper and lower handling jaws will also affect the coaxiality between the wound core and the tray. When the coaxiality deviation is large, it is easy to damage the positive extreme of the wound core when the upper and lower handling jaws pick up the wound core and place it on the tray. At present, although the winding machine will give an alarm, the quality problem of the damaged electrode group and the impact on the product qualification rate have already occurred and cannot be changed. Summary of the Invention

[0003] Aiming at the deficiencies described in the above-mentioned prior art, the present invention provides a method and device for improving the loss of the positive extreme of a wound core.

[0004] The technical solution adopted by the present invention is as follows: A device for improving the loss of the positive extreme of a wound core includes a collection machine controller, a collection machine touch screen, an upper and lower handling jaw of the collection machine, a wound core tray, and a calibration mold; the calibration mold includes a wound core mold and a mold bearing cup; the mold bearing cup is installed outside the wound core tray; the mold bearing cup is provided with a number of mold placement holes, and the wound core molds are placed in the mold placement holes; a coaxiality detection mechanism is installed on the upper and lower handling jaw of the collection machine; the coaxiality detection mechanism and the collection machine touch screen are respectively connected to the input end of the collection machine controller, and the output end of the collection machine controller is connected to the upper and lower handling jaw of the collection machine and the main power supply of the collection machine. The collection machine controller, the collection machine touch screen, the upper and lower handling jaw of the collection machine, and the wound core tray are all original equipment of the winding machine in the wound core manufacturing process. By controlling the upper and lower handling jaw of the collection machine to hold the wound core mold and move around the wound core tray to detect the coaxiality between the upper and lower handling jaw of the collection machine and the wound core tray, when there is a non-coaxial situation, the collection machine controller controls the entire collection machine to cut off the power supply and stop. After manually adjusting the coaxiality and then restarting, after the positions of the four corners of the wound core tray are all calibrated, the upper and lower handling jaw of the collection machine will no longer damage the edge of the positive extreme of the wound core when transferring the wound core to the wound core tray in the subsequent process.

[0005] As a preferred solution of the present invention, an alarm device is installed on the upper and lower handling jaw of the collection machine, and the alarm device is connected to the output end of the collection machine controller. The alarm device uses a sound alarm, a sound and light alarm, etc., such as a buzzer, an alarm light; as long as it can give an alarm, it can be directly purchased and used.

[0006] As a preferred embodiment of the present invention, the mold-carrying cup is arranged along the width direction of the core tray, and the mold placement holes of the mold-carrying cup correspond one-to-one with the core hole positions in the width direction of the core tray. Keeping consistent with the width direction of the core tray can facilitate the operation.

[0007] As a preferred embodiment of the present invention, four core molds are placed on the mold-carrying cup. Since the core tray is in a state of 4 rows and multiple columns, it is set according to the actual situation of transporting cores each time, approaching the actual state to the greatest extent.

[0008] The present invention also provides a method for improving the loss at the positive extreme of the core. Before the collector transports the core to the core tray, a core tray calibration process is added; the implementation steps of the core tray calibration process are as follows: A calibration mold is installed outside the core tray. The calibration mold includes a mold-carrying cup and a core mold, and the core mold is placed inside the mold-carrying cup; In the same coordinate system, the position coordinates of the core mold and the four corner position coordinates of the core tray are set; and the origin of the coordinate system is based on the origin of the X servo motor and Y servo motor of the upper and lower handling grippers of the collector. The Y axis is in the direction perpendicular to the supply side to the discharge side; the X axis is in the direction from the supply side to the discharge side; Operating parameters are set; the operation starts at 8 o'clock every shift, and the running time is controlled by the running speed. The calibration route is from the position of the first four holes closest to the X axis in terms of distance → the position of the fourth four holes → the position of the 53rd four holes on the X axis → the position of the 56th four holes.

[0009] The collector controller controls the upper and lower handling grippers of the collector to run and pick up the core mold, and runs along the four corner positions of the core tray to correct the tray position according to the set route; the coaxiality detection mechanism installed on the upper and lower handling grippers of the collector detects the coaxiality between the core mold and the tray. If coaxiality abnormality is detected, the collector controller controls the entire core processing line to stop until the coaxiality is normal, and the collector controller resumes the core processing line; if no coaxiality abnormality is detected, after calibration, the collector controller controls the upper and lower handling grippers of the collector to put the core mold back into the core-carrying cup; After calibration, the collector controller controls the upper and lower handling grippers of the collector to perform the original action process.

[0010] As a preferred embodiment of the present invention, the mold-carrying cup is arranged along the width direction of the core tray, and the mold placement holes of the mold-carrying cup correspond one-to-one with the core hole positions in the width direction of the core tray. It is convenient to represent the position coordinates of the core mold and the core tray in the same coordinate system.

[0011] The present invention adds a calibration process to the original operation process of the winding machine, and controls the upper and lower transport claws of the collection machine to clamp the core mold and run along the four sides of the core tray to detect the coaxiality with the core tray. If they are not coaxial, the entire production line of the winding machine will stop, and the coaxiality will be corrected before continuing. After all four corners of the core tray are calibrated, the upper and lower transport claws of the collection machine put the core mold back to the original position, and perform the original function of transporting and transferring the core to the core tray. After the calibration process, the core can be produced continuously, and the positive extreme edge of the core will not be damaged by bumps, thereby improving the product qualification rate and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is the control principle diagram of the present invention.

[0014] Figure 2 It is a schematic diagram of the structure of the mold supporting the support cup of the present invention.

[0015] Figure 3 This is a comparison chart of the improvement of the core damage before and after using the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The winding machine mentioned in this application is a KAIDO winding machine, and the collection machine is the winding equipment part of the winding machine. Before the improvement, after the upper and lower carrying claws of the collection machine handed over the core with the flipping claws, the collection machine set the "X" axis and "Y" axis positions for transportation. The timing of the pole group damage is that after being transported to the set position, the claws clamp the core and fall, and the core interferes with the single hole of the tray core, resulting in the collision and damage of the positive end edge of the core, and the alarm stops. In order to prevent the positive end of the core from being lost during the transfer of the core, the scheme of the present invention is designed.

[0018] Embodiment 1: A device for improving the positive end loss of the winding core, such as Figure 1As shown, it includes a collector controller, a collector touch screen, upper and lower handling jaws of the collector, a core tray, and a calibration mold; the calibration mold includes a core mold and a mold carrier cup; as Figure 2 shown, the mold carrier cup is provided with a number of mold placement holes, and the core molds are placed in the mold placement holes; the mold carrier cup is installed outside the core tray, and the mold carrier cup is arranged along the width direction of the core tray, and the mold placement holes of the mold carrier cup correspond one by one to the core holes in the width direction of the core tray. Keeping consistent with the width direction of the core tray can facilitate operation and positioning.

[0019] The commonly used core tray is of the specification of 16*14. Each time the collector runs, the upper and lower handling jaws of the collector grip four cores at a time, so four core molds are placed in the mold carrier cup.

[0020] A coaxiality detection mechanism is installed on the upper and lower handling jaws of the collector. The coaxiality detection mechanism uses a metal proximity sensor installed on the side of the jaw. When the jaw grips the vertical placement hole of the mold, a poor coaxiality will cause the jaw to move upward, and the metal proximity sensor will alarm when it approaches the metal; the coaxiality detection mechanism and the collector touch screen are respectively connected to the input end of the collector controller. Operations are performed on the collector touch screen so that the collector controller can control the upper and lower handling jaws of the collector to grip the core mold and correct it along the four corners of the core tray. When there is misalignment at any position of the core tray, the collector controller will disconnect the entire production line from the main power supply of the collector. The collector controller can cut off the power supply between the main power supply of the collector and each operating device through an intelligent switch; stop for calibration, and only resume operation after calibration is completed. After all four corners of the core tray are calibrated, the upper and lower handling jaws of the collector will place the core mold back in place and then transfer the core. After calibration, the core will not be knocked when transferred to the core tray. The collector controller, the collector touch screen, the upper and lower handling jaws of the collector, and the core tray are all original equipment of the KAIDO winding machine. By controlling the upper and lower handling jaws of the collector to grip the core mold and move around the perimeter of the core tray to detect the coaxiality of the upper and lower handling jaws of the collector and the core tray, when misalignment occurs, the collector controller controls the entire collector to power off and stop. After manually adjusting the coaxiality and restarting, when all four corners of the core tray are position-calibrated, the upper and lower handling jaws of the collector will not knock and damage the positive extreme edge of the core when transferring the core to the core tray in the future.

[0021] And an alarm device is installed on the upper and lower handling jaws of the collector. The alarm device is connected to the output end of the collector controller. The alarm device uses a sound alarm, a sound and light alarm, etc., such as a buzzer, an alarm light; as long as it can emit an alarm, it can be directly purchased and used.

[0022] Embodiment 2: A method for improving the loss at the positive extreme of the core. Before the collector transports the core to the core tray, a core tray calibration process is added. The implementation steps of the core tray calibration process are as follows: A calibration mold is installed on the outer side of the core tray. The calibration mold includes a mold bearing cup and a core mold, and the core mold is placed in the mold bearing cup. The mold bearing cup is arranged along the width direction of the core tray, and the mold placement holes of the mold bearing cup correspond one by one to the core hole positions in the width direction of the core tray. This facilitates representing the position coordinates of the core mold and the core tray in the same coordinate system.

[0023] In the same coordinate system, set the position coordinates of the core mold and the four corner position coordinates of the core tray. And the origin of the coordinate system is based on the origin of the X servo motor and Y servo motor of the upper and lower handling grippers of the collector. The Y-axis is in the direction from the vertical supply side to the discharge side; the X-axis is in the direction from the supply side to the discharge side. Set the operating parameters; the operation is at eight o'clock per shift, and the operation time is controlled by the operating speed. The calibration route is from the position of the 1st of the four holes closest to the X-axis in terms of distance reference → the position of the 4th of the four holes to the position of the 53rd of the four holes on the X-axis → the position of the 56th of the four holes.

[0024] The collector controller controls the upper and lower handling grippers of the collector to run and pick up the core mold, and runs along the four corner positions of the core tray according to the set route to correct the tray position. The coaxiality detection mechanism installed on the upper and lower handling grippers of the collector detects the coaxiality between the core mold and the tray. If coaxiality abnormalities are detected, the collector controller controls the entire core processing line to stop until the coaxiality is normal, and then the collector controller resumes the core processing line. If no coaxiality abnormalities are detected after calibration, after calibration, the collector controller controls the upper and lower handling grippers of the collector to put the core mold back into the core bearing cup. After calibration, the collector controller controls the upper and lower handling grippers of the collector to perform the original action process.

[0025] As Figure 3 shown, after using the solution of the present invention, the defective rate is reduced from 0.096% to below 0.03%, and the defective rate is reduced by 0.066%, improving the product qualification rate.

[0026] In the description of this specification, the descriptions with reference to terms such as "an embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0027] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A device for improving the loss at the positive extreme of the coil core, characterized in that: It includes a collector controller, a collector touch screen, upper and lower handling jaws of the collector, a core reel tray, and a calibration die; the calibration die includes a core reel die and a die carrier cup; the die carrier cup is installed outside the core reel tray; the die carrier cup is provided with a number of die placement holes, and the core reel die is placed in the die placement holes; a coaxiality detection mechanism is installed on the upper and lower handling jaws of the collector; the coaxiality detection mechanism and the collector touch screen are respectively connected to the input end of the collector controller, and the output end of the collector controller is connected to the upper and lower handling jaws of the collector and the total power supply of the collector.

2. The device for improving the loss at the positive extreme of the core as claimed in claim 1, wherein: An alarm device is installed on the upper and lower handling jaws of the collector, and the alarm device is connected to the output end of the collector controller.

3. The device for improving the loss at the positive extreme of the core according to claim 2, characterized in that: The die carrier cup is arranged along the width direction of the core reel tray, and the die placement holes of the die carrier cup correspond one by one to the core reel hole positions in the width direction of the core reel tray.

4. The device for improving the loss at the positive extreme of the core according to claim 3, characterized in that: Four core reel dies are placed on the die carrier cup.

5. A method for improving the loss at the positive extreme of the core, characterized in that, Before the collector transports the core reel to the core reel tray, a core reel tray calibration process is added; the implementation steps of the core reel tray calibration process are as follows: Install a calibration die outside the core reel tray. The calibration die includes a die carrier cup and a core reel die, and the core reel die is placed in the die carrier cup. Under the same coordinate system, set the position coordinates of the core reel die and the four corner position coordinates of the core reel tray. Set the operating parameters. The collector controller controls the upper and lower handling jaws of the collector to operate to clamp the core reel die, and runs along the four corner positions of the core reel tray according to the set route to correct the tray position; the coaxiality detection mechanism installed on the upper and lower handling jaws of the collector detects the coaxiality between the core reel die and the tray. If the detected coaxiality is abnormal, the collector controller controls the entire core reel processing line to stop until the coaxiality is normal, and the collector controller resumes the core reel processing line; if the detected coaxiality is normal, after the calibration is completed, the collector controller controls the upper and lower handling jaws of the collector to put the core reel die back into the core reel carrier cup. After the calibration is completed, the collector controller controls the upper and lower handling jaws of the collector to perform the original action process.

6. The method for improving the loss at the positive extreme of the coil core according to claim 5, wherein: The die carrier cup is arranged along the width direction of the core reel tray, and the die placement holes of the die carrier cup correspond one by one to the core reel hole positions in the width direction of the core reel tray.

Images