Lithium battery sheeting apparatus

Abstract

The application belongs to the technical field of battery manufacturing equipment, and particularly relates to a lithium battery tab manufacturing device, which comprises a unwinding mechanism, a defect marking mechanism and a forming mechanism. When the defect marking mechanism does not detect surface defects of the battery tab, the forming mechanism periodically and intervally sets initial marking holes and end marking holes on the battery tab, and prepares a tab between the initial marking holes and the end marking holes. When the defect marking mechanism detects surface defects of the battery tab, when the surface defects reach the forming mechanism, the forming mechanism sets the next initial marking hole after the previous end marking hole is set and the battery tab passes through a single winding length. When the previous end marking hole is not set, the forming mechanism sets the next initial marking hole after the surface defects pass through the forming mechanism. In this way, the overall scrapping of the battery tab is avoided when defects occur on the battery tab, and the overall manufacturing cost of the lithium ion battery is effectively reduced.

Description

Technical Field

[0001] This application belongs to the field of battery manufacturing equipment technology, and in particular relates to a lithium battery sheet making equipment. Background Technology

[0002] In recent years, with the advancement of technology, lithium-ion batteries have gradually become widely used. Compared with ordinary batteries, the manufacturing process of lithium-ion batteries is more complex, among which the most critical process is the preparation of battery electrodes.

[0003] In the existing technology, the preparation of battery electrode sheets requires multiple processes such as coating, rolling, die cutting, and tab forming. After each roll of battery electrode sheets is completed, defects generated during the manufacturing process need to be marked. Once a defect is found, a complete battery electrode sheet unit needs to be scrapped, resulting in the waste of defect-free parts of the battery electrode sheet and increasing the manufacturing cost of lithium batteries.

[0004] Application content

[0005] The purpose of this application is to provide a lithium battery electrode fabrication equipment, which aims to solve the technical problem in the prior art that when defects occur in the preparation of battery electrodes, a complete battery electrode unit needs to be scrapped, resulting in the waste of the defect-free part of the battery electrode and increasing the manufacturing cost of lithium batteries.

[0006] To achieve the above objectives, the technical solution adopted in this application is: a lithium battery sheet manufacturing apparatus, comprising...

[0007] An unwinding mechanism for unwinding battery electrode sheets;

[0008] A defect identification mechanism is used to identify and mark surface defects of the battery electrode sheet;

[0009] A forming mechanism, when the defect marking mechanism does not detect surface defects of the battery electrode, periodically opens initial marking holes and end marking holes on the battery electrode according to a preset length, and prepares electrode tabs on the battery electrode located between the initial marking holes and the end marking holes;

[0010] When the defect marking mechanism detects a surface defect in the battery electrode, before the location of the surface defect in the battery electrode reaches the forming mechanism, after the forming mechanism has completed the opening of the previous endpoint marking hole, the forming mechanism opens the next initial marking hole after the battery electrode has passed through a single roll length.

[0011] Before the location of the surface defect on the battery electrode reaches the forming mechanism, and before the forming mechanism has completed the opening of the previous endpoint marking hole, the forming mechanism opens the next initial marking hole after the location of the surface defect on the battery electrode passes through the forming mechanism.

[0012] Optionally, a tension buffer arm is provided between the unwinding mechanism and the defect marking mechanism, the tension buffer arm being used to adjust the tension of the battery electrode.

[0013] Optionally, a dust removal mechanism is provided between the tension buffer arm and the defect marking mechanism, the dust removal mechanism being used for dust removal and iron removal of the battery electrode.

[0014] Optionally, an electrode clamping mechanism is provided between the powder brushing and dust removal mechanism and the defect marking mechanism. The electrode clamping mechanism is used to pre-clamp the electrode on the battery electrode sheet.

[0015] Optionally, a correction mechanism is provided between the tab pressing mechanism and the defect marking mechanism. The correction mechanism is used to correct the conveying trajectory of the battery electrode so that the coating area of ​​the battery electrode is kept on the central axis of the conveying trajectory of the battery electrode.

[0016] Optionally, a slitting mechanism is provided between the correction mechanism and the defect marking mechanism. The slitting mechanism is used to cut the battery electrode sheet into two electrode sheets. There are two defect marking mechanisms and two forming mechanisms. The defect marking mechanism and the forming mechanism are respectively arranged on the movement path of the corresponding electrode sheet.

[0017] Optionally, a battery electrode buffer mechanism is provided between the defect identification mechanism and the corresponding forming mechanism, the battery electrode buffer mechanism being used to buffer at least one battery electrode of single roll length.

[0018] Optionally, the forming mechanism includes a punching assembly for opening the initial marking hole and the end marking hole, an electrode forming mechanism for forming the electrode tab, and an ion air dust collector. The punching assembly, the electrode forming mechanism, and the ion air dust collector are sequentially arranged on the side of the battery electrode buffer mechanism away from the defect marking mechanism.

[0019] Optionally, the forming mechanism includes a laser die-cutting mechanism and an ion air knife dust collector for opening the initial marking hole and the end marking hole and for forming the tab. The laser die-cutting mechanism and the ion air knife dust collector are sequentially arranged on the side of the battery electrode buffer mechanism away from the defect marking mechanism. The side of the ion air knife dust collector away from the defect marking mechanism is provided with a tab smoothing mechanism and a winding mechanism. The tab smoothing mechanism is used to smooth the tab formed on the battery electrode, and the winding mechanism is used to wind up the battery electrode after the tab is formed.

[0020] Optionally, the forming mechanism further includes a marking detector, which is disposed on the laser die-cutting mechanism and used to detect surface defects of the battery electrode. When the marking detector detects a surface defect of the battery electrode, before the location of the surface defect of the battery electrode reaches the laser die-cutting mechanism, after the laser die-cutting mechanism has completed the opening of the previous endpoint marking hole, the laser die-cutting mechanism opens the next initial marking hole after the battery electrode has passed through a single roll length.

[0021] Before the location of the surface defect on the battery electrode reaches the forming mechanism, and before the laser die-cutting mechanism has completed the opening of the previous endpoint marking hole, the laser die-cutting mechanism opens the next initial marking hole after the location of the surface defect on the battery electrode passes through the laser die-cutting mechanism.

[0022] The beneficial effects of this application are as follows: In the lithium battery sheet manufacturing equipment of this application, during operation, the unwinding mechanism releases the battery electrode sheet, and the defect marking mechanism marks the surface defects present on the battery electrode sheet. The marked battery electrode sheet is then conveyed to the forming mechanism. When the defect marking mechanism does not detect surface defects on the battery electrode sheet, the forming mechanism can periodically open initial marking holes and end marking holes on the battery electrode sheet according to a preset length, and prepare electrode tabs on the battery electrode sheet between the initial marking holes and the end marking holes; thus, normal electrode tabs can be prepared on the battery electrode sheet. When the defect marking mechanism detects a surface defect, before the location of the surface defect on the battery electrode sheet reaches the forming mechanism, the forming mechanism completes the opening of the previous end marking hole, that is, after completing the previous drilling cycle of the initial marking hole and the end marking hole, the forming mechanism can open the next initial marking hole after the battery electrode sheet has passed through a single roll length; thus, the surface defect falls on a portion of the battery electrode sheet within that single roll length, so only that portion of the battery electrode sheet needs to be removed, without scrapping the entire battery electrode sheet. When the forming mechanism has not completed the opening of the previous endpoint marking hole, the forming mechanism opens the next initial marking hole after passing through the surface defect position of the battery electrode. This is equivalent to the position of the surface defect on the battery electrode falling between the previous initial marking hole and the next initial marking hole, and not falling between the next initial marking hole and the next endpoint marking hole. Thus, only the battery electrode between the previous initial marking hole and the next initial marking hole needs to be removed. In this way, the lithium battery electrode making equipment provided in this application embodiment avoids the scrapping of a complete battery electrode unit when defects occur on the battery electrode, realizing efficient and economical utilization of the battery electrode, and thus effectively reducing the overall manufacturing cost of lithium-ion batteries. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the lithium battery sheet-making equipment provided in the embodiments of this application;

[0025] Figure 2 Another structural schematic diagram of the lithium battery sheet-making equipment provided in the embodiments of this application.

[0026] The following are the labeling elements in the figure:

[0027] 10—Unwinding mechanism; 11—Unwinding shaft; 12—First roll diameter measuring device

[0028] 13—Unwinding Positioner 14—Unwinding Track Corrector 15—Unwinding Track Corrector Sensor

[0029] 16—Connecting platform; 20—Battery electrode sheet; 21—Electrode separator.

[0030] 30—Defect Identification Mechanism; 31—CCD Vision Module; 32—Labeling Mechanism

[0031] 40—Forming Mechanism; 41—Drilling Assembly; 42—Electrical Tab Forming Mechanism

[0032] 43—Ion air knife dust collector; 44—Tension detector; 45—Laser die-cutting mechanism

[0033] 50—Tension buffer arm; 51—Low friction cylinder; 52—Oscillating roller

[0034] 60—Powder brushing and dust removal mechanism; 70—Electrical tab pressing mechanism; 80—Correction correction mechanism.

[0035] 81—Correction sensor; 82—Correction device; 90—Sliding mechanism

[0036] 91—Battery electrode buffer mechanism; 92—Passing roller; 93—Drive roller

[0037] 94—Electrical tab smoothing mechanism; 95—Rewinding mechanism; 96—Rewinding shaft

[0038] 97—Material feeding positioner; 98—Second roll diameter measuring device; 99—Length measuring detector. Detailed Implementation

[0039] The embodiments of this application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description is based on the accompanying drawings. Figures 1-2 The described embodiments are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0040] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] like Figure 1 and Figure 2 As shown in the figure, this application provides a lithium battery wafer fabrication apparatus, including:

[0044] The unwinding mechanism 10 is used to unwind the battery electrode 20; wherein, the unwinding mechanism 10 includes an unwinding shaft 11 for winding the battery electrode 20 and a rotary motor, the drive shaft of the rotary motor is connected to the unwinding shaft 11 to drive the unwinding shaft 11 to rotate.

[0045] Optionally, the unwinding mechanism 10 further includes an unwinding positioner 13, a first roll diameter measuring device 12, an unwinding correction sensor 15, an unwinding correction device 14, and a tape-joining platform 16 arranged sequentially. The first roll diameter measuring device 12 is set corresponding to the unwinding shaft 11 and is used to measure and calculate the roll diameter of the battery electrode 20 wound on the unwinding shaft 11. The unwinding positioner 13 is also set corresponding to the unwinding shaft 11 to position the battery electrode 20 output from the unwinding shaft 11. The unwinding correction device 14 and the unwinding correction sensor 15 are arranged between the unwinding shaft 11 and the tape-joining platform 16 to correct the deviation of the battery electrode 20 output from the unwinding shaft 11.

[0046] The defect marking mechanism 30 is used to identify and mark surface defects of the battery electrode 20. Specifically, the defect marking mechanism 30 includes a CCD vision module 31 and a labeling mechanism 32. The CCD vision module 31 detects surface defects by capturing images of the surface of the battery electrode 20, and the labeling mechanism 32 affixes identification marks to the defect locations on the surface of the battery electrode 20.

[0047] The forming mechanism 40, when the defect marking mechanism 30 does not detect surface defects of the battery electrode 20, periodically opens initial marking holes and end marking holes on the battery electrode according to a preset length, and prepares electrode tabs on the battery electrode 20 located between the initial marking holes and the end marking holes.

[0048] When the defect marking mechanism 30 detects a surface defect in the battery electrode 20, before the location of the surface defect in the battery electrode 20 reaches the forming mechanism 40, after the forming mechanism 40 has completed the opening of the previous endpoint marking hole, the forming mechanism 40 opens the next initial marking hole after the battery electrode 20 has passed through a single roll length (single roll length of the winding machine).

[0049] Before the battery electrode 20 with a surface defect reaches the forming mechanism 40, and before the forming mechanism 40 has completed the opening of the previous endpoint mark hole, the forming mechanism 40 opens the next initial mark hole after the surface defect position of the battery electrode 20 passes the forming mechanism 40.

[0050] It should be noted that there may be one or multiple surface defects. When there are multiple surface defects, before the position of the surface defect of the battery electrode 20 reaches the forming mechanism 40, after the forming mechanism 40 has completed the opening of the previous end mark hole, the forming mechanism 40 opens the next initial mark hole after the battery electrode 20 has passed through a single roll length and after the last surface defect has passed.

[0051] The following provides a further description of the lithium battery sheet making equipment provided in the embodiments of this application: During operation, the unwinding mechanism 10 releases the battery electrode sheet 20, and the defect marking mechanism 30 marks the surface defects present on the battery electrode sheet 20. The marked battery electrode sheet 20 is then conveyed to the forming mechanism 40. When the defect marking mechanism 30 does not detect any surface defects on the battery electrode sheet 20, the forming mechanism 40 can periodically open initial marking holes and end marking holes on the battery electrode sheet according to a preset length, and prepare electrode tabs on the battery electrode sheet 20 between the initial marking holes and the end marking holes; thus, normal electrode tabs can be prepared on the battery electrode sheet 20. When the defect marking mechanism 30 detects a surface defect, before the location of the surface defect on the battery electrode 20 reaches the forming mechanism 40, the forming mechanism 40 completes the opening of the previous endpoint marking hole. That is, after completing the drilling cycle of the previous initial marking hole and the endpoint marking hole, the forming mechanism 40 can open the next initial marking hole after the battery electrode 20 has passed through a single roll length. In this way, the surface defect will fall on a portion of the battery electrode 20 within that single roll length, so only that portion of the battery electrode 20 needs to be removed, without scrapping the entire battery electrode 20. If the forming mechanism 40 has not completed the opening of the previous endpoint marking hole, the forming mechanism 40 will open the next initial marking hole after the surface defect location on the battery electrode 20 has passed through the forming mechanism 40. This means that the position of the surface defect on the battery electrode 20 falls between the previous initial marking hole and the next initial marking hole, but not between the next initial marking hole and the next end marking hole. Thus, only the battery electrode 20 between the previous initial marking hole and the next initial marking hole needs to be removed. In this way, the lithium battery manufacturing equipment provided in this application embodiment avoids the scrapping of a complete battery electrode 20 unit when defects occur on the battery electrode 20, realizing efficient and economical utilization of the battery electrode 20, and thus effectively reducing the overall manufacturing cost of lithium-ion batteries.

[0052] In other embodiments of this application, such as Figure 1 and Figure 2 As shown, a tension buffer arm 50 is provided between the unwinding mechanism 10 and the defect marking mechanism 30. The tension buffer arm is used to adjust the tension of the battery electrode. Specifically, the tension buffer arm 50 includes a swing roller 52 and a low-friction cylinder 51 for adjusting the position of the swing roller 52. In this way, when the battery electrode 20 passes through the swing roller 52, the tension of the battery electrode 20 relative to both sides of the swing roller 52 can be effectively adjusted by adjusting the position of the swing roller 52. This prevents the battery electrode 20 from becoming too tight and breaking.

[0053] In other embodiments of this application, such as Figure 1 and Figure 2As shown, a dust removal mechanism 60 is provided between the tension buffer arm 50 and the defect marking mechanism 30. The dust removal mechanism 60 is used for dust removal and iron removal from the battery electrode 20. Specifically, the dust removal mechanism 60 includes a drive motor, a spiral brush, an exhaust pipe corresponding to the spiral brush, and an exhaust duct connected to the exhaust pipe. The drive motor drives the spiral brush to rotate, so that the spiral brush removes dust and iron powder and other metal impurities from the surface of the battery electrode 20. The dust and iron powder and other metal impurities can then be discharged to the outside through the exhaust pipe and exhaust duct.

[0054] In other embodiments of this application, such as Figure 1 and Figure 2 As shown, a tab pressing mechanism 70 is provided between the powder brushing and dust removal mechanism 60 and the defect marking mechanism 30. The tab pressing mechanism 70 is used to pre-press tabs on the battery electrode 20. Specifically, the tab pressing mechanism 70 includes an indentation roller and a support roller. When the battery electrode 20 passes between the indentation roller and the support roller, the indentation roller can press tabs into its surface to facilitate subsequent tab forming.

[0055] In other embodiments of this application, such as Figure 1 and Figure 2 As shown, a correction mechanism 80 is provided between the tab pressing mechanism 70 and the defect marking mechanism 30. Specifically, the correction mechanism 80 is positioned before the slitting mechanism 90. The correction mechanism 80 is used to correct the conveying trajectory of the battery electrode 20, ensuring that the coating area of ​​the battery electrode 20 remains on the central axis of its conveying trajectory. Specifically, the correction mechanism 80 may include the correction sensor 80 and the correction device 82 mentioned above. By providing the correction mechanism 80 between the tab pressing mechanism 70 and the defect marking mechanism 30, the positions of the coating area and the blank area of ​​the battery electrode 20 are detected and adjusted, thereby ensuring the accuracy of subsequent defect identification, battery electrode 20 slitting, marking hole punching, and tab forming.

[0056] Optionally, the correction sensor can be a CCD vision sensor or an ultrasonic sensor, etc.

[0057] Optionally, a dust removal mechanism 60 can be provided between the cutting mechanism 90 and the corresponding defect marking mechanism 30 to ensure that the surface of the battery electrode 20 is free of impurities and dust before entering the defect marking mechanism 30.

[0058] In other embodiments of this application, such as Figure 1 and Figure 2As shown, a slitting mechanism 90 is provided between the correction mechanism 80 and the defect marking mechanism 30. The slitting mechanism 90 is used to slit the battery electrode 20 into two electrode pieces 21. Correspondingly, there are two defect marking mechanisms 30 and two forming mechanisms 40, which are respectively arranged on the movement path of the corresponding electrode pieces 21. Specifically, the slitting mechanism 90 includes an upper cutter, a lower cutter, and a servo motor. The servo motor drives the upper cutter and the lower cutter to act on the battery electrode 20 to divide the battery electrode 20 into left and right electrode pieces 21. When the lithium battery manufacturing equipment includes the slitting mechanism 90, there are correspondingly two defect marking mechanisms 30 and two forming mechanisms 40, as well as other mechanisms arranged between them, to mark defects, open marking holes, and form electrode tabs on the left and right electrode pieces 21, respectively. By using the slitting mechanism 90 to divide the battery electrode 20 into left and right electrode pieces 21, the distribution density of defects on the upper surface of the battery electrode 20 can be significantly reduced, thereby further improving the utilization rate of the battery electrode 20.

[0059] In other embodiments of this application, such as Figure 1 and Figure 2 As shown, a battery electrode buffer mechanism 91 is provided between the defect marking mechanism 30 and the corresponding forming mechanism 40. The battery electrode buffer mechanism 91 is used to buffer at least one single roll length of battery electrode 20. Specifically, the battery electrode buffer mechanism includes a guide roller 92, a drive roller 93, a driven roller, and a guide plate arranged in sequence. The drive roller 93 is connected to the guide roller 92 and the driven roller to drive the rotation of the guide roller 92 and the driven roller. The guide plate is arranged corresponding to the driven roller and is flush with the conveying direction of the driven roller. In this way, the battery electrode 20 can be buffered by the conveying of the guide roller 92 and the driven roller. The length of the conveying path formed by the parallel arrangement of each guide roller 92 is greater than or equal to at least one single roll length of the battery electrode 20, so as to effectively buffer the battery electrode 20. At the same time, the tension can be separated by the front and rear sections of the battery electrode 20 through the guide roller 92 to avoid the breakage of the battery electrode 20.

[0060] Optionally, a correction mechanism 80 may be provided between the battery electrode buffer mechanism 91 and the forming mechanism 40 to further ensure the accuracy of marking holes and forming tabs on the battery electrode 20.

[0061] In other embodiments of this application, such as Figure 1As shown, as a specific implementation of the forming mechanism 40, the forming mechanism 40 includes a punching assembly 41 for opening initial and final marking holes, a tab forming mechanism 42 for forming tabs, and an ion air knife dust collector 43. The tab forming mechanism 42 can be a metal die-cutting mechanism or a laser die-cutting mechanism 45. The punching assembly 41, the tab forming mechanism 42, and the ion air knife dust collector 43 are sequentially arranged on the side of the battery electrode buffer mechanism 91 opposite to the defect marking mechanism 30. Specifically, the punching assembly 41 opens initial and final marking holes on the battery electrode 20 according to set parameters. After completion, the tab forming mechanism 42 forms tabs between the initial and final marking holes. When surface defects appear on the surface of the battery electrode 20, initial and final marking holes are opened on the battery electrode 20 according to the logic described above, and tabs are formed. Further details are omitted here.

[0062] In other embodiments of this application, such as Figure 2 As shown, in another specific implementation of the forming mechanism 40, the forming mechanism 40 includes a laser die-cutting mechanism 45 for opening initial marking holes and end-point marking holes, and an ion air knife dust collector 43 for forming electrode tabs. The laser die-cutting mechanism 45 and the ion air knife dust collector 43 are sequentially arranged on the side of the battery electrode buffer mechanism 91 opposite to the defect marking mechanism 30. Specifically, in another specific implementation of the forming mechanism 40, by setting the laser die-cutting mechanism 45, it can simultaneously perform the functions of opening initial marking holes and end-point marking holes, as well as forming electrode tabs. This optimizes the process of opening initial marking holes and end-point marking holes, and forming electrode tabs, enabling the lithium battery sheet making equipment to achieve process savings, while also reducing the process cost of opening initial marking holes and end-point marking holes, and forming electrode tabs.

[0063] In other embodiments of this application, such as Figure 1 and Figure 2As shown, the forming mechanism 40 also includes a marking detector, which is set on the laser die-cutting mechanism 45 and is used to detect surface defects of the battery electrode 20. Specifically, the marking detector can detect the position of the surface defect by the identification mark affixed to the surface defect by the labeling mechanism 32 of the defect marking mechanism 30. When the position of the surface defect of the battery electrode 20 reaches the laser die-cutting mechanism 45, after the laser die-cutting mechanism 45 has completed the opening of the previous end mark hole, the laser die-cutting mechanism 45 opens the next initial mark hole after the battery electrode 20 has passed through a single roll length. When the position of the surface defect of the battery electrode 20 reaches the forming mechanism 40, and the laser die-cutting mechanism 45 has not completed the opening of the previous end mark hole, the laser die-cutting mechanism 45 opens the next initial mark hole after the position of the surface defect of the battery electrode 20 has passed through the laser die-cutting mechanism 45. Specifically, a tension detector 44 can be installed between the laser die-cutting mechanism 45 and the winding mechanism 95 to measure the tension of the battery electrode 20 before it enters the winding mechanism 95, so as to ensure that the tension of the battery electrode 20 is not too high.

[0064] In other embodiments of this application, such as Figure 1 and Figure 2 As shown, the ion air knife dust collector 43 has an electrode smoothing mechanism 94 and a winding mechanism 95 on the side opposite to the defect marking mechanism 30. The electrode smoothing mechanism 94 is used to smooth the electrode tabs formed on the battery electrode sheet 20, and the winding mechanism 95 is used to wind up the battery electrode sheet 20 after the electrode tabs have been formed. Specifically, by setting up the ion air knife dust collector 43, the ion air knife dust collector 43 can further remove dust from the battery electrode sheet 20 after the electrode tabs have been formed. The winding mechanism 95 includes a winding shaft 96 for the battery electrode 20, a winding motor for driving the winding shaft 96 to rotate, a length measuring detector 99, a feeding positioner 97, and a second roll diameter measuring device 98. After the electromagnetic battery electrode is completed, it first passes through the length measuring detector 99 to measure the length of the battery electrode, and then is wound up by the winding shaft 96 and the winding motor. At the same time, the tab smoother smooths the tabs on the battery electrode 20. The second roll diameter measuring device 98 measures the roll diameter of the battery electrode 20 wound on the winding shaft 96. When the roll diameter reaches the set value, the machine stops and an alarm is triggered.

[0065] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A lithium battery wafer manufacturing apparatus, characterized in that: include An unwinding mechanism is used to unwind battery electrode sheets; wherein, the unwinding mechanism includes an unwinding shaft for winding battery electrode sheets and a rotary motor, the drive shaft of the rotary motor is velocarily connected to the unwinding shaft to drive the unwinding shaft to rotate; A defect identification mechanism is used to identify and mark surface defects of the battery electrode sheet; A forming mechanism, when the defect marking mechanism does not detect surface defects of the battery electrode, periodically opens initial marking holes and end marking holes on the battery electrode according to a preset length, and prepares electrode tabs on the battery electrode located between the initial marking holes and the end marking holes; When the defect marking mechanism detects a surface defect in the battery electrode, before the location of the surface defect in the battery electrode reaches the forming mechanism, after the forming mechanism completes the opening of the previous endpoint marking hole, the forming mechanism opens the next initial marking hole after the battery electrode has passed through a single roll length. In this way, the surface defect can fall on a portion of the battery electrode within that single roll length, so only that portion of the battery electrode within that single roll length needs to be removed. Before the location of the surface defect on the battery electrode reaches the forming mechanism, and before the forming mechanism has completed the opening of the previous endpoint marking hole, the forming mechanism opens the next initial marking hole after the location of the surface defect on the battery electrode passes through the forming mechanism, so that the location of the surface defect falls between the previous initial marking hole and the next initial marking hole.

2. The lithium battery wafer fabrication equipment according to claim 1, characterized in that: A tension buffer arm is provided between the unwinding mechanism and the defect marking mechanism, and the tension buffer arm is used to adjust the tension of the battery electrode.

3. The lithium battery sheet making equipment according to claim 2, characterized in that: A dust removal mechanism is provided between the tension buffer arm and the defect marking mechanism. The dust removal mechanism is used for dust removal and iron removal of the battery electrode.

4. The lithium battery wafer fabrication equipment according to claim 3, characterized in that: A tab pressing mechanism is provided between the powder brushing and dust removal mechanism and the defect marking mechanism. The tab pressing mechanism is used to pre-press the tabs on the battery electrode.

5. The lithium battery sheet making equipment according to claim 4, characterized in that: A correction mechanism is provided between the tab pressing mechanism and the defect marking mechanism. The correction mechanism is used to correct the conveying trajectory of the battery electrode to keep the coating area of ​​the battery electrode on the central axis of the conveying trajectory.

6. The lithium battery wafer fabrication equipment according to claim 5, characterized in that: A slitting mechanism is provided between the correction mechanism and the defect marking mechanism. The slitting mechanism is used to cut the battery electrode sheet into two electrode sheets. There are two defect marking mechanisms and two forming mechanisms. The defect marking mechanism and the forming mechanism are respectively arranged on the movement path of the corresponding electrode sheet.

7. The lithium battery wafer fabrication equipment according to claim 6, characterized in that: A battery electrode buffer mechanism is provided between the defect identification mechanism and the corresponding forming mechanism. The battery electrode buffer mechanism is used to buffer at least one battery electrode of single roll length.

8. The lithium battery sheet making equipment according to claim 7, characterized in that: The forming mechanism includes a punching assembly for opening the initial marking hole and the end marking hole, an electrode forming mechanism for forming the electrode tab, and an ion air knife dust collector. The punching assembly, the electrode forming mechanism, and the ion air knife dust collector are sequentially arranged on the side of the battery electrode buffer mechanism away from the defect marking mechanism.

9. The lithium battery sheet making equipment according to claim 7, characterized in that: The forming mechanism includes a laser die-cutting mechanism for opening the initial marking hole and the end marking hole, and an ion air knife dust collector for forming the tab. The laser die-cutting mechanism and the ion air knife dust collector are sequentially arranged on the side of the battery electrode buffer mechanism away from the defect marking mechanism. The side of the ion air knife dust collector away from the defect marking mechanism is provided with a tab smoothing mechanism and a winding mechanism. The tab smoothing mechanism is used to smooth the tab formed on the battery electrode, and the winding mechanism is used to wind up the battery electrode after the tab is formed.

10. The lithium battery wafer fabrication equipment according to claim 9, characterized in that: The forming mechanism also includes a marking detector, which is disposed on the laser die-cutting mechanism and used to detect surface defects of the battery electrode. When the marking detector detects a surface defect of the battery electrode, before the location of the surface defect of the battery electrode reaches the laser die-cutting mechanism, after the laser die-cutting mechanism has completed the opening of the previous endpoint marking hole, the laser die-cutting mechanism opens the next initial marking hole after the battery electrode has passed through a single roll length. Before the location of the surface defect on the battery electrode reaches the forming mechanism, and before the laser die-cutting mechanism has completed the opening of the previous endpoint marking hole, the laser die-cutting mechanism opens the next initial marking hole after the location of the surface defect on the battery electrode passes through the laser die-cutting mechanism.

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