Pole piece manufacturing apparatus and control method

Abstract

The application discloses a kind of pole piece manufacturing equipment and its control method, pole piece manufacturing equipment includes die cutting device, detection unit and first drive unit, die cutting device is provided with first punching mechanism and second punching mechanism, the first punching member of first punching mechanism is provided with first punching part and second punching part, first punching part is used to carry out die cutting to the empty foil area of pole piece material belt, to form tab, second punching part is used to carry out die cutting to the side of electrode film of pole piece material belt close to empty foil area, to form first V type angle, second punching mechanism is provided with second punching member, and second punching member is used to carry out die cutting to the side of electrode film of pole piece material belt away from empty foil area, to form second V type angle;Detection unit is used to detect pole piece material belt;First drive unit is used to drive first punching mechanism and second punching mechanism move along the direction of transport perpendicular to pole piece material belt.Pole piece manufacturing equipment can carry out die cutting processing and V type angle cutting processing to tab of pole piece material belt simultaneously.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to electrode manufacturing equipment. Background Technology

[0002] In related technologies, battery cells can be categorized into winding and lamination processes based on their manufacturing techniques. For lamination, the electrode strip with tabs formed in the empty foil area needs to be cut to create a V-shaped angle. Then, the electrode strip is cut at the V-shaped angle to form sheet-like electrodes. These sheet-like electrodes are then stacked to form the battery cell. Therefore, existing processing equipment requires electrode strips with already cut tabs as raw material for subsequent V-shaped angle cutting and electrode strip cutting. It cannot simultaneously perform the die-cutting process for forming tabs and the cutting process for forming V-shaped angles on electrode strips with an electrode film coated on the surface. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes an electrode manufacturing equipment that can simultaneously perform die-cutting of electrode tabs and V-angle cutting on electrode strips, effectively improving the electrode manufacturing efficiency.

[0004] The present invention also proposes a control method for the above-mentioned electrode manufacturing equipment.

[0005] An electrode manufacturing apparatus according to a first aspect embodiment of the present invention includes:

[0006] The die-cutting apparatus includes a first punching mechanism and a second punching mechanism. The first punching mechanism includes a first punching member, which has a first punching section and a second punching section. The edges of the first punching section and the second punching section are connected. The first punching section is used to die-cut the empty foil area of ​​the electrode strip to form an electrode tab. The second punching section is used to die-cut the electrode film of the electrode strip near the empty foil area to form a first V-shaped angle. The second punching mechanism includes a second punching member, which is used to die-cut the electrode film of the electrode strip away from the empty foil area to form a second V-shaped angle.

[0007] The electrode manufacturing equipment according to embodiments of the present invention has at least the following beneficial effects: The electrode manufacturing equipment includes a die-cutting device, which is provided with a first punching mechanism and a second punching mechanism. The first punching mechanism performs die-cutting on the empty foil area of ​​the electrode strip and the side of the electrode film near the empty foil area to form an electrode tab in the empty foil area and a first V-shaped angle on the side of the electrode film near the empty foil area. The second punching mechanism performs die-cutting on the side of the electrode film away from the empty foil area, forming a second V-shaped angle on the side of the electrode film away from the empty foil area. In this way, the electrode tab and the first V-shaped angle and the second V-shaped angle can be processed on the electrode strip in one punching process, which facilitates the cutting mechanism on the electrode manufacturing equipment to cut the electrode strip into sheet-like electrodes, shortens the process flow, and effectively improves the sheet manufacturing efficiency.

[0008] According to some embodiments of the present invention, the position of the second punching portion corresponds to the position of the second punching member, so that the first V-shaped angle and the second V-shaped angle formed in a single punching process are arranged on both sides of the electrode strip along the width direction.

[0009] According to some embodiments of the present invention, the electrode manufacturing equipment further includes a pulling mechanism, which is disposed at the front of the die-cutting device in the electrode strip conveying direction and is used to tension the electrode strip located on the die-cutting device. The pulling mechanism is provided with a first pulling roller, a second pulling roller, and a conveying roller. The first pulling roller is located on one side of the conveying roller, and the second pulling roller is located on the other side of the conveying roller. The first pulling roller and the second pulling roller are located on one side of the electrode strip, and the conveying roller is located on the other side of the electrode strip. The first pulling roller and the second pulling roller can apply two opposite pulling forces to the electrode strip before it enters the die-cutting device, so that the portion of the electrode strip before entering the die-cutting device is in a bent state.

[0010] According to some embodiments of the present invention, the electrode manufacturing equipment further includes a cutting mechanism, which is disposed at the front of the die-cutting device in the electrode strip conveying direction and is used to cut the line connecting the first V-angle and the second V-angle, i.e. the cutting line, to form a sheet electrode.

[0011] According to some embodiments of the present invention, the electrode manufacturing equipment further includes a pulling mechanism, which includes a first pulling roller, a second pulling roller, and a conveying roller. The first pulling roller is located on one side of the conveying roller, and the second pulling roller is located on the other side of the conveying roller. The first pulling roller and the second pulling roller are located on one side of the electrode strip, and the conveying roller is located on the other side of the electrode strip. The pulling mechanism is disposed between the die-cutting device and the cutting mechanism. The first pulling roller and the second pulling roller can apply two opposite pulling forces to the electrode strip so that the portion of the electrode strip located between the die-cutting device and the cutting mechanism is in a bent state. The distance between the first pulling roller and the second pulling roller can be adjusted so that the length of the electrode strip between the first fitted cutting line and the second fitted cutting line is an integer multiple of the length of the sheet electrode.

[0012] The first fitting cutting line is: the line connecting the bent end of the second punching part toward the center of the electrode strip and the bent end of the second punching part toward the center of the electrode strip;

[0013] The second fitting cutting line is: along the cutting direction of the cutting mechanism, the projection line of the cutting surface of the cutting mechanism on the electrode strip.

[0014] According to some embodiments of the present invention, the electrode manufacturing equipment further includes a second driving unit, the second driving unit being used to adjust the distance between the die-cutting device and the cutting mechanism, so that the length of the electrode strip between the first fitted cutting line and the second fitted cutting line is an integer multiple of the length of the sheet electrode;

[0015] The first fitting cutting line is: the line connecting the bent end of the second punching part toward the center of the electrode strip and the bent end of the second punching part toward the center of the electrode strip;

[0016] The second fitting cutting line is: along the cutting direction of the cutting mechanism, the projection line of the cutting surface of the cutting mechanism on the electrode strip.

[0017] According to some embodiments of the present invention, the electrode manufacturing equipment further includes a third driving unit, and the die-cutting device is further provided with a third punching mechanism. The third driving unit is used to drive the third punching mechanism to move along the conveying direction of the electrode strip. The third punching mechanism is used to form a compensation cutting area on the electrode strip. The compensation cutting area overlaps with the punching area of ​​the first punching part to form the electrode tab.

[0018] According to some embodiments of the present invention, the electrode manufacturing apparatus further includes:

[0019] The detection unit is used to obtain the boundary line between the empty foil area and the electrode film, and to obtain the edge of the electrode film away from the empty foil area;

[0020] The first driving unit is used to drive the first punching mechanism and the second punching mechanism to move along the conveying direction perpendicular to the electrode strip, that is, the width direction of the electrode strip.

[0021] A control method according to a second aspect of the present invention includes:

[0022] The first punching mechanism is placed in the empty foil area, such that the first punching part is aligned with the empty foil area, and the second punching part is aligned with the side edge of the electrode film near the empty foil area;

[0023] The second punching mechanism is positioned on the side of the electrode film away from the empty foil area, so that the second punching member is aligned with the edge of the electrode film away from the empty foil area;

[0024] The first punching mechanism and the second punching mechanism simultaneously punch the electrode strip.

[0025] According to some embodiments of the present invention, the boundary line between the empty foil region and the electrode film is obtained by the detection unit;

[0026] The first driving unit controls the first punching mechanism to move along the width direction of the electrode strip so that the distance between the edge connecting the first punching part and the second punching part and the boundary line is L1.

[0027] The detection unit obtains the edge of the electrode film on the side away from the empty foil area;

[0028] The first driving unit controls the second punching mechanism to move along the width direction of the electrode strip so that the distance between the second V-shaped bend end to be formed and the edge of the electrode film away from the empty foil area is L2.

[0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0031] Figure 1 This is a schematic diagram of an electrode manufacturing apparatus according to an embodiment of the present invention;

[0032] Figure 2 for Figure 1 A schematic diagram of the die-cutting device of the electrode manufacturing equipment is shown;

[0033] Figure 3 for Figure 2 A schematic diagram of the first punching mechanism of the die-cutting device is shown;

[0034] Figure 4 for Figure 2 A schematic diagram of the second punching mechanism of the die-cutting device is shown;

[0035] Figure 5 for Figure 3 A schematic diagram of the first punching element of the first punching mechanism is shown;

[0036] Figure 6 for Figure 4 A schematic diagram of the second punching element of the second punching mechanism is shown;

[0037] Figure 7 This is a schematic diagram of an electrode strip according to an embodiment of the present invention;

[0038] Figure 8 for Figure 7 The diagram shows a die-cutting schematic of the electrode strip.

[0039] Figure 9 This is a flowchart of a control method according to an embodiment of the present invention.

[0040] Figure label:

[0041] Material pulling mechanism 100, first material pulling roller 110, second material pulling roller 120, conveying roller 130, cutting mechanism 200, die cutting device 300, first punching mechanism 310, first punching part 311, first punching section 312, second punching section 313, first punching 314, second punching mechanism 320, second punching part 321, second punching 322, unloading unit 400, vision inspection mechanism 410, defective product tank 420, good product tank 430, first drive unit 500, electrode strip 600, empty foil area 610, electrode tab 611, electrode film 620, first V-angle 621, second V-angle 622, cutting line 630. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below. Examples of these embodiments 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 embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0043] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0044] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0045] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0046] In related technologies, battery cells can be categorized into winding and lamination processes based on their manufacturing techniques. For lamination, the electrode strip with tabs formed in the empty foil area needs to be cut to create a V-shaped angle. Then, the electrode strip is cut at the V-shaped angle to form sheet-like electrodes. These sheet-like electrodes are then stacked to form the battery cell. Therefore, existing processing equipment requires electrode strips with already cut tabs as raw material for subsequent V-shaped angle cutting and electrode strip cutting. It cannot simultaneously perform the die-cutting process for forming tabs and the cutting process for forming V-shaped angles on electrode strips with an electrode film coated on the surface.

[0047] To address the technical problems existing in the prior art, the present invention provides an electrode manufacturing apparatus, including a die-cutting device. The die-cutting device is equipped with a first punching mechanism and a second punching mechanism. The first punching mechanism performs die-cutting on the empty foil area of ​​the electrode strip and the side of the electrode film near the empty foil area to form an electrode tab in the empty foil area and a first V-shaped angle on the side of the electrode film near the empty foil area. The second punching mechanism performs die-cutting on the side of the electrode film away from the empty foil area, forming a second V-shaped angle on the side of the electrode film away from the empty foil area. In this way, the electrode tab and the first V-shaped angle and the second V-shaped angle can be processed on the electrode strip in one punching process, which facilitates the cutting mechanism on the electrode manufacturing equipment to cut the electrode strip into sheet-shaped electrodes, shortens the process flow, and effectively improves the sheet manufacturing efficiency.

[0048] Reference Figure 1 , Figure 7 and Figure 8It is understood that the electrode manufacturing equipment provided in this embodiment of the invention includes an unwinding mechanism, a pulling mechanism 100, a die-cutting device 300, a cutting mechanism 200, and a blanking unit 400 arranged sequentially along the conveying direction of the electrode strip 600. The electrode strip 600 includes an electrode film 620 and an empty foil area 610. During die-cutting, electrode tabs 611 need to be cut out of the empty foil area 610, and a first V-angle 621 and a second V-angle 622 need to be cut out of the electrode film 620. The unwinding mechanism is used to store and output the electrode strip 600. The pulling mechanism 100 is used to tension the electrode strip 600. The die-cutting device 300 is used to die-cut the electrode strip 600 to form tabs 611, a first V-angle 621, and a second V-angle 622 on the electrode strip 600. The first V-angle 621 and the second V-angle 622 are distributed opposite to each other on both sides of the electrode strip 600, and the line connecting the two is the cutting line 630. After cutting, the V-angles divide to form the chamfer of two adjacent sheet-like electrodes. The cutting mechanism 200 is equipped with a cutting element, generally a cutter, and is used to cut the electrode strip 600 into sheet-like electrodes along the cutting line 630. The unloading unit 400 is equipped with a visual inspection mechanism 410, a defective product trough 420, and a good product trough 430. The visual inspection mechanism 410 is used to detect defects in the sheet-like electrodes, the defective product trough 420 is used to collect defective products, and the good product trough 430 is used to collect good products.

[0049] It should be noted that the electrode manufacturing equipment also includes a detection unit and a first drive unit 500. The detection unit is used to obtain the boundary line between the empty foil area 610 and the electrode film 620, as well as the edge of the electrode film 620 away from the empty foil area 610. The first drive unit 500 is used to drive the first punching mechanism 310 and the second punching mechanism 320 to move along the width direction of the electrode strip 600. There are two first drive units 500. The two first drive units 500 respectively control the first punching mechanism 310 and the second punching mechanism 320 to move along the width direction of the electrode strip 600, so as to realize the spacing adjustment or correction according to the width change of the strip or the width change of the tab 611.

[0050] Reference Figures 2 to 8It is understood that the die-cutting device 300 is provided with a first punching mechanism 310 and a second punching mechanism 320. The first punching mechanism 310 is provided with a first punching member 311, and a first punching hole is also provided corresponding to the first punching member 311. The first punching member 311 can be punched into the first punching hole. The electrode strip 600 is placed between the first punching member 311 and the first punching hole. The first punching member 311 is provided with a first punching part 312 and a second punching part 313. The edges of the first punching part 312 and the second punching part 313 are connected. The first punching part 312 is used to punch the electrode strip 600. The empty foil area 610 of the electrode strip 600 is die-cut to form an electrode tab 611. The second punching part 313 is used to die-cut the side of the electrode film 620 of the electrode strip 600 near the empty foil area 610 to form a first V-shaped angle 621. The second punching mechanism 320 is provided with a second punching part 321. The second punching part 321 is used to die-cut the side of the electrode film 620 of the electrode strip 600 away from the empty foil area 610 to form a second V-shaped angle 622. Similarly, a second punch 322 is provided corresponding to the second punching part 321. The second punching part 321 can be punched into the second punch 322.

[0051] It should be noted that when the die-cutting device 300 performs die-cutting processing, the first punching mechanism 310 moves along the width direction of the electrode strip 600 to the empty foil area 610, so that the first punching part 312 is aligned with the empty foil area 610 and the second punching part 313 is aligned with the side edge of the electrode film 620 near the empty foil area 610. The second punching mechanism 320 moves along the width direction of the electrode strip 600 to the side of the electrode film 620 away from the empty foil area 610, so that the second punching part 321 is aligned with the side edge of the electrode film 620 away from the empty foil area 610. The first punching mechanism 310 and the second punching mechanism 320 punch the electrode strip 600 at the same time.

[0052] Specifically, the first punching portion 312 is a rectangular area, and the second punching portion 313 is a triangular area with the bent end facing the center of the electrode strip 600 to form a first V-shaped angle 621. The punching surface of the second punching member 321 includes a rectangular area and a triangular area arranged and connected along the width direction of the electrode strip 600. The bent end of the triangular area of ​​the second punching member 321 faces the center of the electrode strip 600 to form a second V-shaped angle 622 on the electrode film 620.

[0053] It should be noted that, further, the position of the second punching part 313 corresponds to the position of the second punching part 321, so that the first V-angle 621 and the second V-angle 622 formed in one punching process correspond to each other. The line connecting the first V-angle 621 and the second V-angle 622 is parallel to the width direction of the electrode strip 600, that is, the length direction of the cutting line 630 extends along the width direction of the electrode strip 600.

[0054] Reference Figures 1 to 8It is understood that the pulling mechanism 100 is located at the front of the die-cutting device 300 in the conveying direction of the electrode strip 600, and is used to tension the electrode strip 600 located on the die-cutting device 300. The pulling mechanism 100 is provided with a first pulling roller 110, a second pulling roller 120 and a conveying roller 130. The first pulling roller 110 is located on one side of the conveying roller 130, and the second pulling roller 120 is located on the other side of the conveying roller 130. The first pulling roller 110 and the second pulling roller 120 are located on one side of the electrode strip 600, and the conveying roller 130 is located on the other side of the electrode strip 600. The first pulling roller 110 and the second pulling roller 120 can apply two opposite pulling forces to the electrode strip 600 before it enters the die-cutting device 300, so that the part of the electrode strip 600 before it enters the die-cutting device 300 is in a bent state.

[0055] It should be noted that the advantages of the material pulling mechanism 100 as described above are as follows: First, this method can keep the portion of the electrode strip 600 located on the die-cutting device 300 taut, avoiding the dragging of the electrode strip 600 by the first punching member 311 and the second punching member 321 after contacting the electrode strip 600 during the punching process due to the presence of slack portions, which could lead to die-cutting errors or even breakage of the electrode strip 600. The material pulling mechanism 100 improves the die-cutting accuracy and effect, and reduces the burr problem generated during die-cutting. Second, this method can prevent the vibration of the portion of the electrode strip 600 located on the die-cutting device 300 during the punching process of the electrode tab 611 from being transmitted to the upstream unwinding mechanism, thus avoiding errors in the unwinding rhythm of the unwinding mechanism.

[0056] It should be noted that, further, the electrode manufacturing equipment can also be equipped with a second material pulling mechanism 100. The second material pulling mechanism 100 is located between the die-cutting device 300 and the cutting mechanism 200. By adjusting the distance between the first material pulling roller 110 and the second material pulling roller 120, the length of the electrode strip 600 between the die-cutting device 300 and the cutting mechanism 200 is an integer multiple of the length of the sheet electrode. Specifically, the length of the electrode strip 600 between the first fitted cutting line and the second fitted cutting line is an integer multiple of the length of the sheet electrode. The first fitted cutting line is the line connecting the bent end of the second punching part 313 toward the center of the electrode strip 600 and the bent end of the second punching part 321 toward the center of the electrode strip 600. The second fitted cutting line is the projection line of the punching surface of the cutting mechanism 200 on the electrode strip 600 along the punching direction of the cutting mechanism 200. It is understood that in some other embodiments, the electrode manufacturing equipment further includes a second drive unit for adjusting the distance between the die-cutting device 300 and the cutting mechanism 200, such that the distance between the second punching part 313 and the second punching part 321 and the cutting part of the cutting mechanism 200 is an integer multiple of the length of the sheet electrode, that is, the length of the electrode strip 600 between the first fitted cutting line and the second fitted cutting line is an integer multiple of the length of the sheet electrode, wherein the first fitted cutting line and the second fitted cutting line are as described above.

[0057] It should be noted that, further, the electrode manufacturing equipment also includes a third drive unit, and the die-cutting device 300 is also provided with a third punching mechanism. The third drive unit is used to drive the third punching mechanism to move along the conveying direction of the electrode strip 600. The third punching mechanism is used to cut the width of the electrode tab 611, thereby realizing the synchronous adjustment of the width of the formed electrode tab 611 and the spacing between adjacent formed electrode tabs 611.

[0058] Reference Figure 1 , Figures 7 to 9 This invention provides a control method for the above-mentioned electrode manufacturing equipment, comprising the following steps:

[0059] S100: The boundary line between the empty foil area 610 and the electrode film 620 is obtained through the detection unit;

[0060] S200: The first driving unit 500 controls the first punching mechanism 310 to move along the conveying direction perpendicular to the electrode strip 600, so that the distance between the edge connecting the first punching part 312 and the second punching part 313 and the boundary line is L1.

[0061] S300: The edge of the electrode film 620 away from the empty foil area 610 is obtained by the detection unit;

[0062] S400: The first drive unit 500 controls the second punching mechanism 320 to move along the conveying direction perpendicular to the electrode strip 600, so that the distance between the bent end of the second V-shaped angle 622 to be formed and the edge of the electrode film 620 away from the empty foil area 610 is L2.

[0063] S500: The first driving unit 500 controls the first punching mechanism 310 and the second punching mechanism 320 to perform die cutting on the electrode strip 600.

[0064] It should be noted that the L1 reserved distance is to avoid the increase of burrs caused by long-distance cutting of the electrode film when cutting the tab. The punching of the empty foil area 610 will have fewer burrs than the punching of the electrode film 620. Therefore, when the reserved L1 is greater than 0, the first punching part 312 will not punch the electrode film 620, and the electrode film will be punched by the second punching part 313, ensuring better cutting quality.

[0065] It should be noted that, further, the control method also includes: controlling the die-cutting device 300 and the cutting mechanism 200 to move along the conveying direction of the electrode strip 600 through the second drive unit, and adjusting the distance L3 between the die-cutting device 300 and the cutting mechanism 200 so that L3 is an integer multiple of the length of a single pre-made sheet electrode.

[0066] It should be noted that in some other embodiments, the control method further includes: controlling the third punching mechanism to move along the conveying direction of the electrode strip 600 through the third drive unit; when the third punching part of the third punching mechanism is located between the two electrode tabs 611 and partially covers the electrode tabs 611, the third punching mechanism is controlled by the third drive unit to perform die cutting on the electrode tabs 611.

[0067] It should be noted that in step S100, L1 can be 0 or a preset distance, which can be adjusted according to the actual production design requirements.

[0068] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. Electrode manufacturing equipment, characterized in that, include: The die-cutting device includes a first punching mechanism and a second punching mechanism. The first punching mechanism includes a first punching member, which has a first punching portion and a second punching portion. The edges of the first punching portion and the second punching portion are connected. The first punching portion is used to die-cut the empty foil area of ​​the electrode strip to form an electrode tab. The second punching portion is used to die-cut the electrode film of the electrode strip near the empty foil area to form a first V-shaped angle. The second punching mechanism includes a second punching member, which is used to die-cut the electrode film of the electrode strip away from the empty foil area to form a second V-shaped angle. The first punching portion is a rectangular area, and the second punching portion is a triangular area with the bent end facing the center of the electrode strip to form the first V-shaped angle. The punching surface of the second punching member includes a rectangular area and a triangular area arranged and connected along the width direction of the electrode strip. The bent end of the triangular area of ​​the second punching member faces the center of the electrode strip to form the second V-shaped angle on the electrode film. The detection unit is used to obtain the boundary line between the empty foil area and the electrode film, and to obtain the edge of the electrode film away from the empty foil area; The first driving unit is used to drive the first punching mechanism and the second punching mechanism to move along the width direction of the electrode strip, so that the distance between the edge where the first punching part and the second punching part are connected and the boundary line is L1, where L1 is greater than 0.

2. The electrode manufacturing equipment according to claim 1, characterized in that, The position of the second punching part corresponds to the position of the second punching piece, so that the first V-shaped angle and the second V-shaped angle formed during one punching process are arranged on both sides of the electrode strip along the width direction.

3. The electrode manufacturing equipment according to claim 1, characterized in that, The electrode manufacturing equipment also includes a cutting mechanism, which is located at the front of the die-cutting device in the electrode strip conveying direction and is used to cut the line connecting the first V-angle and the second V-angle, i.e. the cutting line, to form a sheet electrode.

4. The electrode manufacturing equipment according to claim 1, characterized in that, The electrode manufacturing equipment further includes a third drive unit, and the die-cutting device is further provided with a third punching mechanism. The third drive unit is used to drive the third punching mechanism to move along the conveying direction of the electrode strip. The third punching mechanism is used to form a compensation cutting area on the electrode strip. The compensation cutting area overlaps with the punching area of ​​the first punching part to form the electrode tab.

5. A control method, applied to the electrode manufacturing equipment as described in any one of claims 1 to 4, characterized in that, include: The first punching mechanism is placed in the empty foil area, such that the first punching part is aligned with the empty foil area, and the second punching part is aligned with the side edge of the electrode film near the empty foil area; The second punching mechanism is positioned on the side of the electrode film away from the empty foil area, so that the second punching member is aligned with the edge of the electrode film away from the empty foil area; The first punching mechanism and the second punching mechanism simultaneously punch the electrode strip.

6. The control method according to claim 5, characterized in that, The electrode manufacturing equipment further includes a detection unit and a first drive unit, and the control method further includes: The boundary line between the empty foil area and the electrode film is obtained through the detection unit; The first driving unit controls the first punching mechanism to move along the width direction of the electrode strip so that the distance between the edge connecting the first punching part and the second punching part and the boundary line is L1. The detection unit obtains the edge of the electrode film on the side away from the empty foil area; The first driving unit controls the second punching mechanism to move along the width direction of the electrode strip so that the distance between the second V-shaped bend end to be formed and the edge of the electrode film away from the empty foil area is L2.

Images