Cutting roll abnormality processing method and device

Abstract

The application discloses a kind of cutting roll abnormality processing method and device, after laser die cutting, the sheet length of battery pole piece is excessively long abnormality detection, when detecting the sheet length of battery pole piece is excessively long abnormality, when the buffer amount of second buffer zone is distance minimum value first length outside, but within distance minimum value second length, trigger roll needle to start speed reduction winding with pre-winding uniform speed, when the buffer amount of second buffer zone is distance minimum value first length, control roll needle stop winding, then control roll needle is restarted at normal winding deceleration speed at next winding time, and the sheet length of battery pole piece of excessively long abnormality is sent to winding work station, and the single winding of abnormality battery pole piece is discharged, it is not necessary to manually handle abnormality sheet when abnormality sheet appears, improve the abnormality sheet processing efficiency of cutting roll integrated machine.

Description

Technical Field

[0001] This invention relates to the field of battery cell processing technology, and in particular to a method and apparatus for handling abnormalities in the cutting and rolling process. Background Technology

[0002] The battery cell electrode cutting and winding machine first die-cuts the electrodes at the laser cutting station, then applies adhesive along the path, and finally winds the electrode cores at the winding station. During the operation of the cutting and winding machine, abnormal electrodes may appear due to reasons such as tape splicing, laser die-cutting parameter modifications, or die-cutting interruptions leading to subsequent cutting. When encountering abnormal electrodes, the winding time is mismatched with that of normal electrodes, which can easily cause the second buffer zone to reach its limit. This often requires manual intervention, significantly impacting production efficiency. Therefore, it is necessary to provide methods for handling abnormal electrodes to improve the cutting and winding efficiency of the cutting and winding machine. Summary of the Invention

[0003] This invention provides a method and apparatus for handling abnormal cutting and rolling, which improves the efficiency of handling abnormal pieces in an integrated cutting and rolling machine.

[0004] In view of this, the first aspect of the present invention provides a method for handling roll-cutting anomalies, comprising:

[0005] S1. Perform abnormal detection on the electrode sheets of the laser-cut battery cell that are too long;

[0006] S2. If the battery cell electrode has an abnormally long length, when the buffer amount in the second buffer area is outside the minimum first length but within the minimum second length, the winding needle is triggered to start winding at a pre-winding uniform speed. When the buffer amount in the second buffer area is within the minimum first length, the winding needle is controlled to stop winding. The second buffer area is used to buffer the battery cell electrode after the adhesive has been applied.

[0007] S3. In the next winding time, control the winding needle to restart at the normal winding deceleration speed, and send the abnormally long battery cell electrode to the winding station.

[0008] Optionally, step S3 may be followed by:

[0009] S4. At the winding station, the defective battery cell electrode sheets are individually wound and unloaded into the defective material storage area using the defective material winding device.

[0010] Optionally, step S2 may be followed by:

[0011] S5. Check if the cache size of the second cache area has reached the maximum value. If so, control the second main drive to stop working. The second main drive is the main drive used to control the adhesive application speed.

[0012] Optionally, step S5 further includes:

[0013] The system checks whether the cache size of the first buffer has reached its maximum value. If so, it controls the first main drive to stop working. The first main drive is used to control the laser die-cutting speed, and the first buffer is used to cache the electrode sheets of the battery cells that have completed laser die-cutting.

[0014] Optionally, the first length is 20mm and the second length is 50mm.

[0015] Optionally, step S1 includes:

[0016] At the laser die-cutting station, a CCD vision inspection device is used to detect abnormalities such as excessively long electrode sheets of the laser-cut battery cells.

[0017] A second aspect of the present invention provides a device for handling roll cutting anomalies, comprising:

[0018] Anomaly detection module is used to detect abnormalities such as excessive length of electrode sheets after laser die-cutting of battery cells;

[0019] The winding speed control module is used to trigger the winding needle to start winding at a pre-winding uniform speed when the buffer amount in the second buffer area is outside the minimum first length but within the minimum second length if there is an abnormality of excessive length of the battery cell electrode. When the buffer amount in the second buffer area is within the minimum first length, the winding needle is controlled to stop winding. The second buffer area is used to buffer the battery cell electrode after the adhesive has been applied.

[0020] The restart module is used to control the winding needle to restart at the normal winding deceleration speed in the next winding time, and to send the abnormally long battery cell electrode to the winding station.

[0021] Optionally, it also includes:

[0022] The sorting module is used to unload abnormal battery cell electrode sheets into single rolls at the winding station via a defective material winding device and transfer them to the defective material storage area.

[0023] Optionally, it also includes:

[0024] The cache detection module is used to detect whether the cache size of the second cache area has reached the maximum value. If so, it controls the second main drive to stop working. The second main drive is the main drive used to control the adhesive application speed.

[0025] Optionally, the cache detection module is also used for:

[0026] The system checks whether the cache size of the first buffer has reached its maximum value. If so, it controls the first main drive to stop working. The first main drive is used to control the laser die-cutting speed, and the first buffer is used to cache the electrode sheets of the battery cells that have completed laser die-cutting.

[0027] Optionally, the first length is 20mm and the second length is 50mm.

[0028] Optionally, the anomaly detection module is specifically used for:

[0029] At the laser die-cutting station, a CCD vision inspection device is used to detect abnormalities such as excessively long electrode sheets of the laser-cut battery cells.

[0030] As can be seen from the above technical solutions, the method and apparatus for handling roll cutting anomalies provided by the present invention have the following advantages:

[0031] The present invention provides a method for handling abnormal cutting and winding. After laser die-cutting, the method detects abnormalities in the length of the battery electrode sheet. When an abnormality in the length of the battery electrode sheet is detected, if the buffer amount in the second buffer area is outside the minimum first length but within the minimum second length, the winding needle is triggered to start winding at a pre-winding uniform speed. When the buffer amount in the second buffer area is within the minimum first length, the winding needle is controlled to stop winding. Then, in the next winding time, the winding needle is controlled to restart at the normal winding deceleration speed. The battery electrode sheet with abnormal length is sent to the winding station for single-roll unloading of the abnormal battery electrode sheet. This eliminates the need for manual handling of abnormal sheets when they appear, thus improving the efficiency of abnormal sheet handling in the integrated cutting and winding machine.

[0032] The slitting error processing device provided by the present invention is used to execute the slitting error processing method provided by the present invention. Its principle and the technical effect achieved are the same as those of the slitting error processing method provided by the present invention, and will not be described again here. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a flowchart illustrating a method for handling roll-cutting anomalies provided in this invention.

[0035] Figure 2 This is a schematic diagram of the integrated cell electrode cutting and winding machine provided in this invention;

[0036] Figure 3 This is a schematic diagram illustrating the periodic speed variation of the winding machine processing a single battery cell electrode sheet according to the present invention.

[0037] Figure 4 This is another flowchart illustrating a method for handling roll-cutting anomalies provided in this invention;

[0038] Figure 5This is a schematic diagram of the structure of a roll cutting anomaly processing device provided in this invention. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] For easier understanding, please refer to Figure 1 This invention provides an embodiment of a method for handling roll-cutting anomalies, comprising:

[0041] Step 101: Perform abnormal detection on the electrode sheets of the laser-cut battery cell to ensure that the sheet length is too long.

[0042] It should be noted that the structure of the integrated cell electrode cutting and winding machine is as follows: Figure 2 As shown, the electrode strip is unwound by an unwinding motor, passes through an unwinding buffer, a first main drive-controlled laser cutting section, a first buffer area, electrode adhesive application, a second buffer area, a third buffer area, a third main drive, a tension swing arm, a length encoder, and a feeding section, before finally reaching the winding needle for winding. Under the action of the unwinding motor, the unwound electrode strip is unwound at a constant linear speed during laser cutting. After passing through the unwinding buffer, it reaches the laser cutting position for electrode cutting and shaping. The laser cutting speed is controlled by the first main drive; to ensure the laser cutting effect, the linear speed of the first main drive must be stable. After laser cutting, the electrode is stored in the first buffer area. The purpose of the first buffer area is to allow laser cutting to continue even when the electrode adhesive application is paused. The second main drive controls the adhesive application speed. The second main drive positions the electrode according to the planned speed. The sum of the adhesive application positioning time and the adhesive application time is the cycle time of a single battery cell. To ensure that the adhesive application process does not affect the winding of the winding needle, a second buffer area is designed. During the winding process, to ensure buffer stability and maintain consistent cycle time, the winding needle (i.e., the winding head) needs to apply adhesive synchronously when changing positions. A third buffer area is also designed to adjust the sheet length. The third main drive and tension lever in the winding section can better control the winding linear speed and winding tension. The length encoder is used to detect the length and speed of the winding material. The sheet feeding mechanism is responsible for feeding the material to the winding needle for winding. Process corrections 1, 2, and 3 are used to ensure that the material remains in a certain position without deviation during movement.

[0043] In this embodiment of the invention, an excessively long sheet detection device is provided at the laser die-cutting station to detect excessively long sheet lengths of the electrode sheets after laser die-cutting. Specifically, the excessively long sheet detection device is a CCD vision inspection device.

[0044] Step 102: If the battery cell electrode has an abnormally long length, when the buffer amount in the second buffer area is outside the minimum first length but within the minimum second length, the winding needle is triggered to start winding at a pre-winding uniform speed. When the buffer amount in the second buffer area is within the minimum first length, the winding needle is controlled to stop winding. The second buffer area is used to buffer the battery cell electrode after the adhesive has been applied.

[0045] It should be noted that the process of a winding machine processing a single cell electrode sheet is as follows: Figure 3 As shown, this includes the winding time T1 and the winding auxiliary time T2 for a single cell electrode.

[0046] The formula for calculating the winding time of a single cell electrode is:

[0047] T1 = t 11 +t 12 +t 13 +t 14 +t 15 +t 16 +t 17

[0048] Where T1 is the winding time of a single cell electrode, t 11 For pre-roll acceleration time, t 12 For the pre-winding uniform speed time, t 13 For normal winding acceleration time, t 14 For normal winding at a constant speed, t 15 For normal winding deceleration time, t 16 To catch up with the uniform motion time, t 17 To catch up with the deceleration time.

[0049] The formula for calculating the winding auxiliary time of a single cell electrode is:

[0050] T2=t 21 +t 22 +t 23 +t 24 +t 25

[0051] Where T2 is the winding auxiliary time for a single cell electrode, t 21 For the closing time, t 22 For the time to change workstations, t 23 For membrane coupling time, t 24 t is the needle threading time. 25 This refers to the time for cutting the diaphragm.

[0052] The total winding time T for a single cell electrode is: T = T1 + T2.

[0053] In this embodiment of the invention, the first length is 20mm and the second length is 50mm. When an abnormally long battery electrode is detected, the battery electrode is normally fed to the second buffer area. Because the battery electrode is too long, the speed of the second buffer area remains constant, causing the second buffer area to be unable to buffer a single battery electrode within the winding time of that electrode. This results in the second buffer area approaching its minimum value. Therefore, when the buffer amount in the second buffer area is outside the minimum first length but within the minimum second length, the winding needle is triggered to begin decelerating winding at a pre-winding uniform speed. Figure 3 Chinese 12 The winding speed begins to decrease during the specified period. When the buffer volume in the second buffer area is within the minimum first length, the winding needle is controlled to stop winding.

[0054] Step 103: In the next winding time, control the winding needle to restart at the normal winding deceleration speed, and send the abnormally long battery cell electrode to the winding station.

[0055] It should be noted that after the winding needle stops working, it waits for the winding time of the current single cell electrode to end, and then restarts at the normal winding deceleration speed at the beginning of the next single cell electrode winding time. Figure 3 t in 15 The system restarts at a certain speed during a specific period, sending abnormally long battery cell electrode sheets from the second buffer area to the winding station for single-roll unloading of the abnormal battery cell electrode sheets.

[0056] The present invention provides a method for handling abnormal cutting and winding. After laser die-cutting, the method detects abnormalities in the length of the battery electrode sheet. When an abnormality in the length of the battery electrode sheet is detected, if the buffer amount in the second buffer area is outside the minimum first length but within the minimum second length, the winding needle is triggered to start winding at a pre-winding uniform speed. When the buffer amount in the second buffer area is within the minimum first length, the winding needle is controlled to stop winding. Then, in the next winding time, the winding needle is controlled to restart at the normal winding deceleration speed. The battery electrode sheet with abnormal length is sent to the winding station for single-roll unloading of the abnormal battery electrode sheet. This eliminates the need for manual handling of abnormal sheets when they appear, thus improving the efficiency of abnormal sheet handling in the integrated cutting and winding machine.

[0057] like Figure 4 As shown, in one embodiment, after step 103, step 104 is performed:

[0058] Step 104: At the winding station, the abnormal battery cell electrode sheets are individually wound and unloaded into the defective material storage area using the defective material winding device.

[0059] It should be noted that the winding station is equipped with a defective material winding device. When a battery cell electrode sheet with an abnormally long length arrives at the winding station, the defective material winding device is activated, causing the defective battery cell electrode sheet to be wound into a single roll and unloaded to the defective material storage area.

[0060] In one embodiment, after step 102, the method further includes:

[0061] Step 105: Check if the cache size of the second cache area has reached the maximum value. If so, control the second main drive to stop working, and / or check if the cache size of the first cache area has reached the maximum value. If so, control the first main drive to stop working.

[0062] It should be noted that the first main drive controls the laser die-cutting speed, the first buffer area buffers the laser-cut battery electrode sheets, and the second main drive controls the adhesive application speed. After the winding needle stops, both the first and second main drives operate normally. At this time, the laser buffer area and the second buffer area continuously buffer the battery electrode sheets. When the buffer volume in the laser buffer area reaches its maximum value, the first main drive is triggered to stop driving, halting the laser die-cutting task, and awaiting a restart command to prevent the slitting and rolling machine from malfunctioning due to overload of the first buffer area. When the buffer volume in the second buffer area reaches its maximum value, the second main drive is triggered to stop driving, halting the adhesive application task, and awaiting a restart command to prevent the slitting and rolling machine from malfunctioning due to overload of the second buffer area.

[0063] For easier understanding, please refer to Figure 5 The present invention provides an embodiment of a roll cutting anomaly processing device, comprising:

[0064] Anomaly detection module is used to detect abnormalities such as excessive length of electrode sheets after laser die-cutting of battery cells;

[0065] The winding speed control module is used to trigger the winding needle to start winding at a pre-winding uniform speed when the buffer amount in the second buffer area is outside the minimum first length but within the minimum second length if there is an abnormality of excessive length of the battery cell electrode. When the buffer amount in the second buffer area is within the minimum first length, the winding needle is controlled to stop winding. The second buffer area is used to buffer the battery cell electrode after the adhesive has been applied.

[0066] The restart module is used to control the winding needle to restart at the normal winding deceleration speed in the next winding time, and to send the abnormally long battery cell electrode to the winding station.

[0067] Also includes:

[0068] The sorting module is used to unload abnormal battery cell electrode sheets into single rolls at the winding station via a defective material winding device and transfer them to the defective material storage area.

[0069] Also includes:

[0070] The cache detection module is used to detect whether the cache size of the second cache area has reached the maximum value. If so, it controls the second main drive to stop working.

[0071] The cache detection module is also used for:

[0072] Check if the cache size of the first cache area has reached the maximum value. If so, control the first master drive to stop working.

[0073] The first length is 20mm, and the second length is 50mm.

[0074] The anomaly detection module is specifically used for:

[0075] At the laser die-cutting station, a CCD vision inspection device is used to detect abnormalities such as excessively long electrode sheets of the laser-cut battery cells.

[0076] The slitting error processing device provided by the present invention is used to execute the slitting error processing method provided by the present invention. Its principle and the technical effect achieved are the same as those of the slitting error processing method provided by the present invention, and will not be described again here.

[0077] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for handling roll cutting anomalies, characterized in that, include: S1. Perform abnormal detection on the electrode sheets of the laser-cut battery cell that are too long; S2. If the battery cell electrode has an abnormally long length, when the buffer amount in the second buffer area is outside the minimum first length but within the minimum second length, the winding needle is triggered to start winding at a pre-winding uniform speed. When the buffer amount in the second buffer area is within the minimum first length, the winding needle is controlled to stop winding. The second buffer area is used to buffer the battery cell electrode after the adhesive has been applied. S3. In the next winding time, control the winding needle to restart at the normal winding deceleration speed and send the abnormally long battery cell electrode to the winding station. Step S2 is followed by: S5. Detect whether the cache amount of the second buffer area has reached the maximum value. If so, control the second main drive to stop working. The second main drive is the main drive used to control the adhesive application speed. Detect whether the cache amount of the first buffer area has reached the maximum value. If so, control the first main drive to stop working. The first main drive is the main drive used to control the laser die-cutting speed. The first buffer area is used to cache the cell electrode sheets that have completed laser die-cutting.

2. The method for handling roll cutting anomalies according to claim 1, characterized in that, Step S3 is followed by: S4. At the winding station, the defective battery cell electrode sheets are individually wound and unloaded into the defective material storage area using the defective material winding device.

3. The method for handling roll cutting anomalies according to claim 1, characterized in that, The first length is 20mm, and the second length is 50mm.

4. The method for handling roll cutting anomalies according to claim 1, characterized in that, Step S1 includes: At the laser die-cutting station, a CCD vision inspection device is used to detect abnormalities such as excessively long electrode sheets of the laser-cut battery cells.

5. A device for handling abnormal rolling, characterized in that, include: Anomaly detection module is used to detect abnormalities such as excessive length of electrode sheets after laser die-cutting of battery cells; The winding speed control module is used to trigger the winding needle to start winding at a pre-winding uniform speed when the buffer amount in the second buffer area is outside the minimum first length but within the minimum second length if there is an abnormality of excessive length of the battery cell electrode. When the buffer amount in the second buffer area is within the minimum first length, the winding needle is controlled to stop winding. The second buffer area is used to buffer the battery cell electrode after the adhesive has been applied. The restart module is used to control the winding needle to restart at the normal winding deceleration speed in the next winding time, and to send the abnormally long battery cell electrode to the winding station. Also includes: The cache detection module is used to detect whether the cache size of the second cache area has reached the maximum value. If so, it controls the second main drive to stop working. The second main drive is the main drive used to control the adhesive application speed. The cache detection module is also used for: The system checks whether the cache size of the first buffer has reached its maximum value. If so, it controls the first main drive to stop working. The first main drive is used to control the laser die-cutting speed, and the first buffer is used to cache the electrode sheets of the battery cells that have completed laser die-cutting.

6. The cutting and rolling anomaly handling device according to claim 5, characterized in that, Also includes: The sorting module is used to unload abnormal battery cell electrode sheets into single rolls at the winding station via a defective material winding device and transfer them to the defective material storage area.

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