Laser coil cutting tab dislocation control method and system, all-in-one machine, computer scale storage medium and electronic equipment

Abstract

The invention discloses a laser cutting and coiling tab dislocation control method and system, an all-in-one machine, a computer scale storage medium and electronic equipment, and belongs to the technical field of tab machining, and the method comprises the following steps: simulating a composite sheet being coiled into a plurality of composite sheet units in different intervals, and observing tab dislocation conditions in different intervals; the dislocation amount a from the initial tab to the mth circle of tab in a certain interval is detected; feeding back the dislocation quantity a to the compression roller mechanism, and comparing the dislocation quantity a with a preset dislocation quantity y; if the dislocation amount a is greater than the dislocation amount y, adjusting the pressure of the compression roller, and correcting the thickness of the clad sheet unit; counting is started from the circle where the pressure of the compression roller takes effect, and the dislocation amount a'of the circle of tabs and the mth circle of tabs is detected again and compared with the preset dislocation amount y; and if the dislocation amount a'is less than or equal to the dislocation amount y, stopping adjusting the pressure of the compression roller, and if the dislocation amount a 'is greater than the dislocation amount y, repeating the steps.

Description

Technical Field

[0001] The present invention relates to the technical field of tab processing, and specifically, to a method, system, all-in-one machine, computer-readable storage medium, and electronic device for controlling the misalignment of laser-cut tab rolls. Background Art

[0002] As the market's pursuit of the quality of battery cores is getting higher and higher, the batteries are getting larger and larger, and it is more difficult to control the manufacturing process. The misalignment of battery tabs shows an exponential trend. In a laser-cut tab all-in-one machine, when detecting the misalignment of tabs, generally, the thickness of the electrode sheet is adjusted by a pressure roller. The traditional method is that after the first core is wound, when the misalignment of the tab is recognized, the pressure of the pressure roller is changed to correct the misalignment of the tab in the second core, which will cause a lot of waste of cores. As energy materials and resources become rarer and rarer, from the perspective of protecting resources and saving material costs, it is very meaningful to reduce waste in the manufacturing process.

[0003] The traditional method, as disclosed in the Chinese patent document with the publication number CN219642889U, discloses a core winding device, including a winding needle and a correction mechanism. The winding needle is used to wind the core substrate to form a core, and the correction mechanism includes a correction member that can move relative to the winding needle; when the misalignment amount of the tab of the core wound on the winding needle is greater than a preset threshold, the correction member moves towards the winding needle to press against the core, and as the winding needle rotates, the correction member applies a force to the core to make the misaligned tab move in the opposite direction of the misalignment to reduce the misalignment amount of the tab. Among them, the correction member is equivalent to a pressure roller, and it may also cause a lot of waste of cores when correcting the pressure.

[0004] In addition, in the prior art, there is also a method of adjusting the winding needle for the tab misalignment adjustment. For example, the Chinese patent document with the publication number CN113300057A discloses a method and system for adjusting tab misalignment, calculates the adjustment amount of the outer circumference of the winding needle, and adjusts the outer circumference of the winding needle to a second circumference according to the adjustment amount of the outer circumference, so as to use the adjusted winding needle to wind the next tab group, so that the misalignment distance of the next winding is minimized as much as possible. However, adjusting the outer circumference of the winding needle is more complicated than adjusting the pressure of the pressure roller. Summary of the Invention

[0005] The purpose of the present invention is to provide a method, system, all-in-one machine, computer-readable storage medium, and electronic device for controlling the misalignment of laser-cut tab rolls, to solve the problem in the prior art that after detecting the misalignment of tabs in laser cutting and winding, it is necessary to correct from the current core to the next core after the current core is wound, resulting in material waste.

[0006] To achieve the above purpose, the present invention provides a method for controlling the misalignment of laser-cut tab rolls, including the following steps:

[0007] S1. Simulate the composite sheet being wound into composite sheet units in multiple different intervals, and observe the misalignment of the tabs in different intervals;

[0008] S2. Detect the misalignment amount a of the initial tab to the tab of the m-th turn in a certain interval;

[0009] S3. Feed back the misalignment amount a to the pressure roller mechanism and compare it with the preset misalignment amount y; if the misalignment amount a is greater than the misalignment amount y, adjust the pressure roller pressure to correct the thickness of the composite sheet unit;

[0010] S4. Start counting from the turn when the pressure roller pressure takes effect, re-detect the misalignment amount a' between the tab of this turn and the tab of the m-th turn and compare it with the preset misalignment amount y; if the misalignment amount a' is less than or equal to the misalignment amount y, stop adjusting the pressure roller pressure; if the misalignment amount a' is greater than the misalignment amount y, repeat steps S2, S3, and S4;

[0011] S5. Finish winding the composite sheet and unload the core.

[0012] Furthermore, when the composite sheet is being wound, the misalignment amount a or a' of the tab is calculated by detecting different rotation angles of the winding needle through a sensor.

[0013] Furthermore, the composite sheet is wound into a core after n turns, and the misalignment amount a of the tab to the m-th turn is identified in advance, where m < n / 2.

[0014] Furthermore, the core has n turns and correspondingly has n tabs; taking d1 - dm as the observation interval, when the core is wound to the m-th turn, the misalignment amount a of the current m tabs is detected.

[0015] Furthermore, the composite sheet is wound on the outer side of the winding needle, and the composite sheet is sequentially provided with a separator, a positive electrode sheet, a separator, and a negative electrode sheet from the outside to the inside, and the negative electrode sheet is attached to the outer side of the winding needle.

[0016] Furthermore, the pressure roller changes the pressure to correct the thickness of the positive electrode sheet.

[0017] The present invention also provides a laser cutting and winding tab misalignment control system, including a winding needle for winding a composite sheet into a core; a detection unit for simulating the composite sheet being wound into composite sheet units in multiple different intervals and detecting the misalignment amount of the tab in a certain interval; an instruction unit electrically connected to the detection unit, obtaining the misalignment amount of the tab transmitted by the detection unit and comparing it with the preset misalignment amount of the tab, and issuing an adjustment instruction according to the comparison result; a pressure roller mechanism electrically connected to the instruction unit for receiving the adjustment instruction to adjust the pressure roller pressure and correct the thickness of the composite sheet unit.

[0018] The present invention also provides a laser cutting and winding integrated machine, including the above-mentioned laser cutting and winding tab misalignment control system.

[0019] The present invention also provides a computer-readable storage medium for storing a program, which when executed implements the steps of the above-mentioned laser cutting and winding pole ear misalignment control method.

[0020] The present invention also provides an electronic device, including: a processor; a memory storing executable instructions of the processor; wherein, the processor is configured to execute the steps of the above-mentioned laser cutting and winding pole ear misalignment control method by executing the executable instructions.

[0021] Adopting the technical solution provided by the present invention, compared with the existing well-known technologies, it has the following beneficial effects:

[0022] A laser cutting and winding pole ear misalignment control method of the present invention simulates the composite sheet being wound into composite sheet units in multiple different intervals. By detecting the misalignment amount of the pole ears in a certain interval and comparing it with a preset misalignment amount, if it is greater than the preset misalignment amount, the thickness of the composite sheet unit is corrected by pressing with a pressure roller until the preset misalignment amount requirement is met. The detection and correction work are concentrated in the currently being wound composite sheet, and there is no need to correct in the next roll of composite sheet, i.e., the core, reducing trial and error, thereby reducing the production scrap rate and saving materials.

[0023] Obviously, the elements or features described in the above single embodiment can be used alone or in combination in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the drawings, the dimensions and ratios do not represent the dimensions and ratios of the actual product. The drawings are merely illustrative and, for clarity, certain non-essential elements or features are omitted.

[0025] Figure 1 is a schematic flow chart of the pole ear misalignment control method in an embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of the structure of the composite sheet unfolded and simulated with multiple intervals in an embodiment of the present invention;

[0027] Figure 3 is a comparison diagram of the qualified state and misalignment state of the pole ears in an embodiment of the present invention;

[0028] Figure 4 is a schematic diagram of the structure of the composite sheet and the winding needle in an embodiment of the present invention;

[0029] Figure 5 is a schematic diagram of the structure of the positive electrode sheet and the pressure roller mechanism in an embodiment of the present invention.

[0030] Description of the Reference Numerals

[0031] 100. Composite sheet; 110. Diaphragm; 120. Positive electrode sheet; 130. Negative electrode sheet; 140. Tab; 200. Winding needle; 300. Press roller mechanism. Detailed implementation mode

[0032] Next, the present invention will be described in detail with reference to the accompanying drawings. What is described here is only the preferred implementation mode of the present invention. Those skilled in the art can think of other ways to implement the present invention based on the preferred implementation mode, and other ways also fall within the scope of the present invention.

[0033] From the analysis of basic physical principles, assume that there are n turns in the wound core of a battery. One turn of the wound core is equal to one turn of the composite sheet 100 composed of one turn of the positive electrode sheet 120 + the negative electrode sheet 140 + the diaphragm 110. If the tab 140 of the battery is misaligned and affected by the thickness change amount b of the composite sheet 100, the misalignment amount of the tab 140 is n2 * b * π. Since n is related to the battery design, only b can be changed. The traditional laser cutting and winding integrated machine will use a press roller to apply pressure to the positive electrode sheet, thereby changing the thickness of the positive electrode sheet 120, and then changing the thickness of the composite sheet 100. However, in the traditional winding method, after the current wound core is wound, it is necessary to identify the misalignment of the tab 140 and then change the pressure of the press roller to correct the misalignment of the tab 140 in the next wound core.

[0034] The traditional method will cause more waste of wound cores. Based on this, referring to Figure 1 , this embodiment provides a method for controlling the misalignment of the laser cutting and winding tabs to overcome the defects of the traditional method, including the following steps:

[0035] S1. Simulate the composite sheet 100 being wound into multiple composite sheet units in different intervals, and observe the misalignment of the tabs 140 in different intervals; at this time, all the multiple intervals are concentrated in the currently wound composite sheet 100 and will not bring the problem to the next composite sheet 100.

[0036] S2. Detect the misalignment amount a of the initial tab 140 to the tab 140 of the m-th turn in a certain interval; it should be noted that in this step, when the composite sheet 100 is wound, the different rotation angles of the winding needle 200 are detected by a sensor, and the misalignment amount a of the tab 140 is calculated. The composite sheet 100 is wound into a wound core after n turns. The misalignment amount a of the tab at the m-th turn is identified in advance, where m < n / 2; in this way, the detection of the misalignment amount a can be completed before the current composite sheet 100 is wound into a wound core.

[0037] S3. Feed back the misalignment amount a to the press roller mechanism and compare it with the preset misalignment amount y; if the misalignment amount a is greater than the misalignment amount y, adjust the press roller pressure to correct the thickness of the composite sheet unit;

[0038] S4. Starting from the first round when the pressure of the pressure roller takes effect, re-detect the misalignment amount a' between the tab ears in this round and those in the m-th round, and compare it with the preset misalignment amount y. It should be noted that the misalignment amount a' is also calculated by detecting different rotation angles of the winding needle through a sensor. If the misalignment amount a' is less than or equal to the misalignment amount y, stop adjusting the pressure of the pressure roller; if the misalignment amount a' is greater than the misalignment amount y, repeat steps S2, S3, and S4.

[0039] S5. For the composite sheet in the final winding stage, unload the winding core.

[0040] Through the above steps, the composite sheet 100 being wound is simulated as composite sheet units in multiple different intervals. By detecting the misalignment amount of the tab ears 140 in a certain interval and comparing it with the preset misalignment amount, if it is greater than the preset misalignment amount, the thickness of the composite sheet unit is corrected by applying pressure with the pressure roller until the preset misalignment amount requirement is met. The detection and correction work are concentrated in the current composite sheet 100 being wound, without the need to correct in the next composite sheet 100, i.e., the winding core, reducing trial and error, thereby reducing the production scrap rate and saving materials.

[0041] As Figure 2 and Figure 3 shown, the above steps are further illustrated. ① The winding core has n rounds and correspondingly n tab ears; ② Taking d1 - dm as the observation interval, when the winding core is wound to the m-th round, detect the misalignment amount a of the current m tab ears; ③ Feed the misalignment amount a back to the pressure roller mechanism 300. If the misalignment amount a exceeds the y mm required by the product, the pressure roller mechanism 300 will change the corresponding pressure, change the thickness of the positive electrode sheet 120, and thus change the thickness fluctuation of the composite sheet 100; ④ Since there is a certain distance between the pressure roller mechanism 300 and the winding needle 200, assuming it is the distance of x tab ears 140 after the dm-th tab ear 140, then the next observation of the misalignment of the tab ear 140 starts from dm + x, and dm + x is equivalent to the initial tab ear 140; ⑤ Starting from the dm + x tab ears 140, after another m tab ears 140, observe the misalignment amount a' of the tab ear 140. If it is within the y mm required by the product, stop adjusting the pressure of the pressure roller and roll out a qualified winding core to end; if the misalignment amount a' exceeds the y mm required by the product, repeat ③④⑤ until it is qualified.

[0042] As Figure 4 and Figure 5As shown, the composite sheet 100 is wound around the outer side of the winding pin 200. The composite sheet 100 is sequentially provided with a separator 110, a positive electrode sheet 120, a separator 110, and a negative electrode sheet 130 from the outside to the inside. The negative electrode sheet 130 is attached to the outer side of the winding pin 200. Thus, it can be seen that the thickness of the composite sheet 100 is related to each of the above components. Therefore, in this embodiment, by changing the pressure of the pressure roller to correct the thickness of the positive electrode sheet 120, the thickness of the entire composite sheet 100 can be corrected. Moreover, compared with directly correcting the thickness of the composite sheet 100, correcting the thickness of a single positive electrode sheet 120 is more controllable and can reduce the correction error.

[0043] One aspect of the present application provides a laser-cut winding pole ear misalignment control system, including a winding pin 200, a detection unit, a command unit, and a pressure roller mechanism 300. Each component works together to correct the misalignment of the pole ear 140. Specifically, the winding pin 200 rotates around its own center driven by a power mechanism, and the composite sheet 100 forms a winding core by being wound around the surface of the winding pin 200. The detection unit mainly uses sensors, which are arranged near the winding pin 200, simulating the composite sheet being wound into multiple composite sheet units in different intervals, and detecting the misalignment amount of the pole ear in a certain interval. The command unit usually uses a controller, which is electrically connected to the detection unit, obtains the misalignment amount of the pole ear transmitted by the detection unit, compares it with a preset misalignment amount of the pole ear, and issues an adjustment command according to the comparison result. The pressure roller mechanism 300 includes a pressure roller and a driving member. The pressure roller is connected to the output end of the driving member, and the driving member operates to press the pressure roller against the composite sheet 100. The pressure roller mechanism 300 is electrically connected to the command unit and is used to receive the adjustment command to adjust the pressure of the pressure roller and correct the thickness of the composite sheet unit.

[0044] On the other hand, the present application provides a laser-cut winding integrated machine, including the above-mentioned laser-cut winding pole ear misalignment control system, which can complete the observation and adjustment of the misalignment amount of the pole ear 140 for the composite sheet 100 wound on the current winding pin 200, reduce trial and error, and thus reduce the production scrap rate.

[0045] On yet another aspect of the present application, there is provided a computer-readable storage medium for storing a program, and when the program is executed, the steps of the above-mentioned laser-cut winding pole ear misalignment control method are implemented.

[0046] On yet another aspect of the present application, there is provided an electronic device, including: a processor; a memory storing executable instructions of the processor; wherein, the processor is configured to execute the steps of the above-mentioned laser-cut winding pole ear misalignment control method by executing the executable instructions.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0049] The protection scope of the present invention is only defined by the claims. Benefiting from the teachings of the present invention, those skilled in the art can easily recognize that alternative structures of the structures disclosed in the present invention can be used as feasible alternative embodiments, and the embodiments disclosed in the present invention can be combined to produce new embodiments, which also fall within the scope of the appended claims.

Claims

1. A laser cutting and winding lug misalignment control method, characterized in that: The following steps are involved: S1. Simulate the composite sheet being wound into a plurality of composite sheet units in different intervals, and observe the misalignment of the tabs in different intervals; S2, detecting the misalignment a from the initial tab to the mth tab in a certain interval; S3, feeding back the misalignment amount a to the pressing roller mechanism, and comparing it with the preset misalignment amount y; if the misalignment amount a is greater than the misalignment amount y, adjusting the pressing roller pressure and correcting the thickness of the composite sheet unit; S4, starting from the circle in which the roller pressure takes effect, re-detecting the misalignment a' between the pole lug of this circle and the pole lug of the mth circle and comparing it with the preset misalignment y; if the misalignment a' is less than or equal to the misalignment y, stop adjusting the roller pressure; if the misalignment a' is greater than the misalignment y, repeating steps S2, S3 and S4; S5, the composite sheet that is wound at the end is taken off the line winding core.

2. The laser cutting and winding lug misalignment control method according to claim 1, characterized in that: When the composite sheet is wound, the sensor detects different rotation angles of the winding needle and calculates the misalignment amount a or misalignment amount a' of the tab.

3. The laser cutting and winding lug misalignment control method according to claim 1, characterized in that: The composite sheet is wound n times to form a winding core, and the misalignment amount a of the pole ear of the mth turn is identified in advance, where m<n / 2.

4. The laser cutting and winding lug misalignment control method according to claim 3, characterized in that: The winding core has n turns, corresponding to n pole tabs; d1-dm is used as the observation interval, and when the winding core is wound to the mth turn, the misalignment a of the current m pole tabs is detected.

5. The laser cutting and winding lug misalignment control method according to claim 1, characterized in that: The composite sheet is wound on the outer side of the winding needle, and the composite sheet is provided with a separator, a positive electrode sheet, a separator and a negative electrode sheet in sequence from the outside to the inside, and the negative electrode sheet is attached to the outer side of the winding needle.

6. The laser cutting and winding lug misalignment control method according to claim 5, characterized in that: The pressing roller changes the pressure to correct the thickness of the positive electrode sheet.

7. A laser cutting coil tab misalignment control system, characterized in that: include A winding needle is used to wind the composite sheet to form a winding core; A detection unit, used for simulating the composite sheet being wound into composite sheet units of multiple different sections, and detecting the misalignment of the tabs in a certain section; An instruction unit, which is electrically connected to the detection unit, obtains the tab misalignment amount transmitted by the detection unit and compares it with a preset tab misalignment amount, and issues an adjustment instruction according to the comparison result; The pressing roller mechanism is electrically connected to the instruction unit and is used to receive an adjustment instruction to adjust the pressing roller pressure and correct the thickness of the composite sheet unit.

8. A laser cutting and rolling machine, characterized in that: It includes the laser cutting and winding lug misalignment control system as described in claim 7.

9. A computer-readable storage medium for storing a program, characterized in that: When the program is executed, the steps of the laser cutting and winding lug misalignment control method according to any one of claims 1 to 6 are implemented.

10. An electronic device, characterized in that: include: processor; A memory storing executable instructions of the processor; The processor is configured to execute the steps of the laser cutting and winding tab misalignment control method according to any one of claims 1 to 6 by executing the executable instructions.

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