Die-cutting mechanism and battery cell winding device

Abstract

The present disclosure relates to the technical field of battery processing devices, and in particular to a die-cutting mechanism and a battery cell winding device. The die-cutting mechanism comprises: a material strip guide assembly used for guiding a material strip so that the material strip can be conveyed in a first direction by a preset distance and then be conveyed downstream in a second direction different from the first direction, the position where the material strip turns from the first direction to the second direction being a material strip turning position; a die-cutting assembly used for die-cutting a waste material on the material strip on the upstream of the material strip turning position, so that tabs are formed on the material strip; a waste material suction assembly opposite to the material strip to suction the waste material and the tabs; a waste material receiving assembly used for suctioning the waste material on the waste material suction assembly by means of a suction port; and a shielding member used for reducing the suction force of the suction port to the material strip. The die-cutting mechanism provided by the present disclosure can make tabs relatively flat, so that battery cells have good quality.

Description

Die-cutting mechanism and battery cell winding equipment

[0001] This disclosure claims priority to Chinese Patent Application No. 202420977351.7, filed on May 8, 2024, entitled "Die-cutting Mechanism and Battery Cell Winding Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of battery processing equipment technology, and in particular to a die-cutting mechanism and a cell winding device. Background Technology

[0003] A die-cutting mechanism is a mechanism that uses laser cutting to create tabs on an electrode sheet, thus transforming the electrode sheet into an electrode sheet with tabs.

[0004] After the electrode sheet is transformed into a tab-tipped electrode sheet, it needs to be conveyed downstream to the winding needle for winding to form a battery cell. When the plane of the tab is coplanar with the plane of the electrode sheet itself, the quality of the wound battery cell will be better. However, in actual operation, during the downstream conveying of the tab-tipped electrode sheet, the tab often folds or tilts relative to the electrode sheet itself, resulting in poor quality of the wound battery cell. Summary of the Invention

[0005] This disclosure provides a die-cutting mechanism and a battery cell winding device, which can make the tabs relatively flat, thereby improving the quality of the battery cells.

[0006] To achieve the above objectives, in a first aspect, this disclosure provides a die-cutting mechanism, comprising:

[0007] A material belt guiding assembly is used to guide the material belt so that the material belt can be conveyed downstream along a second direction different from the first direction after being conveyed a preset distance in a first direction. The position where the material belt turns from the first direction to the second direction is the material belt turning position.

[0008] A die-cutting assembly for die-cutting waste material on the strip upstream of the strip turning position to form tabs on the strip;

[0009] A waste suction assembly, wherein the waste suction assembly is opposite to the material belt to adsorb the waste and the electrode tabs to the waste suction assembly;

[0010] A waste receiving assembly, the waste receiving assembly having an adsorption port, the waste receiving assembly being used to adsorb waste from the waste suction assembly into the waste receiving assembly through the adsorption port; and,

[0011] A shielding element is located downstream of the conveyor belt turning position and between the adsorption port and the conveyor belt. The shielding element is used to reduce the adsorption force of the adsorption port on the conveyor belt.

[0012] During the process of the waste receiving assembly adsorbing waste from the suction assembly into the receiving assembly through the suction port, the material strip inevitably experiences adsorption force from the suction port. When the material strip is subjected to adsorption force from the suction port, the tabs connected to the material strip are also subjected to adsorption force from the suction port, which may cause the tabs to fold or lift up. By setting a shielding component between the suction port and the material strip, the shielding component can reduce the adsorption force of the suction port on the material strip, and thus reduce the adsorption force of the suction port on the tabs, thereby preventing the tabs from folding or lifting up, and making the tabs flatter.

[0013] Therefore, when the die-cutting mechanism is applied to the battery cell winding equipment and the material strip is the electrode strip, it can avoid or reduce the occurrence of electrode tab folding or warping, thereby making the electrode tab flatter and resulting in better quality battery cells produced by the battery cell winding equipment.

[0014] Optionally, the shielding member includes a smoothing section located on the conveying track of a second material strip segment, the second material strip segment being a material strip conveyed along the second direction.

[0015] Optionally, the shielding member further includes:

[0016] A first guide section is connected upstream of the smoothing section and points upstream from downstream of the smoothing section. The first guide section is inclined in a direction that gradually moves away from the second material strip section.

[0017] Optionally, the shielding member further includes:

[0018] The second guide section is connected downstream of the smoothing section and points downstream from the upstream of the smoothing section. The second guide section is inclined in a direction that gradually moves away from the second material strip section.

[0019] Optionally, the smoothing section has a flat plate structure.

[0020] Optionally, the shielding member is adjustable in the direction of approaching or moving away from the conveyor belt.

[0021] Optionally, the waste suction assembly includes:

[0022] A straight segment adsorption surface, which is parallel to and opposite to the material belt conveyed along the first direction to adsorb the waste material and the electrode tab, wherein the orthogonal projection of the material belt turning position toward the straight segment adsorption surface is at least partially located within the straight segment adsorption surface.

[0023] Optionally, the waste suction assembly further includes:

[0024] An inclined adsorption surface is connected to and located downstream of the straight adsorption surface. Along the first direction, the inclined adsorption surface is inclined in a direction that gradually moves away from the first material strip segment. The straight adsorption surface is used to convey the waste to the inclined adsorption surface. The waste receiving assembly is used to adsorb the waste on the inclined adsorption surface into the waste receiving assembly through the adsorption port. The first material strip segment is a material strip conveyed along the first direction.

[0025] Optionally, the strip guiding assembly includes:

[0026] A first guide roller, located upstream of the die-cutting assembly; and,

[0027] The second guide roller is located downstream of the die-cutting assembly. The first common tangent of the first guide roller and the second guide roller is located between the first guide roller and the second guide roller. The first direction is located on the first common tangent. The tangent of the first common tangent on the first guide roller is the first tangent, and the tangent on the second guide roller is the second tangent. The material strip passes around the first guide roller and the second guide roller along the first common tangent. The material strip located between the first tangent and the second tangent is conveyed along the first direction. The material strip located downstream of the second tangent is conveyed along the second direction. The position on the material strip corresponding to the second tangent is the material strip turning position.

[0028] Optionally, the waste suction assembly is located on the side of the conveyor belt opposite to the second guide roller.

[0029] Optionally, the strip guiding assembly further includes:

[0030] The third guide roller is located downstream of the second guide roller. The second common tangent of the third guide roller and the second guide roller is located on the same side of the second guide roller and the third guide roller. The second direction is located on the second common tangent. The third guide roller and the second guide roller are used to guide the material belt to be conveyed along the second direction. The included angle between the second common tangent and the first common tangent is an obtuse angle.

[0031] Optionally, the diameter of the first guide roller is equal to the diameter of the second guide roller; and / or, the diameter of the second guide roller is equal to the diameter of the third guide roller.

[0032] Optionally, the die-cutting assembly includes:

[0033] A laser generator, positioned opposite the strip conveyed along the first direction, is used to emit a laser to die-cut the waste material.

[0034] Secondly, this disclosure provides a battery cell winding apparatus, including the die-cutting mechanism described in any of the first aspects above.

[0035] Compared with related technologies, the beneficial effects of this disclosure are as follows:

[0036] In this disclosure, during the process of the waste receiving assembly adsorbing waste from the waste suction assembly into the waste receiving assembly through the suction port, the material strip inevitably experiences adsorption force from the suction port. When the material strip experiences adsorption force from the suction port, the tabs connected to the material strip also experience adsorption force from the suction port, which may cause the tabs to fold or lift. By setting a shielding component between the suction port and the material strip, the shielding component can reduce the adsorption force of the suction port on the material strip, thereby reducing the adsorption force of the suction port on the tabs, thus preventing the tabs from folding or lifting, and making the tabs flatter.

[0037] Therefore, when the die-cutting mechanism is applied to the battery cell winding equipment and the material strip is the electrode strip, it can avoid or reduce the occurrence of electrode tab folding or warping, thereby making the electrode tab flatter and resulting in better quality battery cells produced by the battery cell winding equipment. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 is a schematic diagram of a die-cutting mechanism provided in an embodiment of this disclosure;

[0040] Figure 2 is a schematic diagram of the material strip and material strip guiding assembly in Figure 1;

[0041] Figure 3 is a schematic diagram of the material strip and material strip guiding assembly in Figure 2 (waste material detaches from the electrode tab);

[0042] Figure 4 is a schematic diagram of the waste suction assembly in Figure 1;

[0043] Figure 5 is a structural schematic diagram of the shielding component in Figure 1;

[0044] Figure 6 is a schematic diagram of the structure of a battery cell winding device provided in an embodiment of this disclosure.

[0045] Key reference numerals: 1-Strip guide assembly; 11-First guide roller; 12-Second guide roller; 13-Third guide roller; 131-Second connector; 2-Die-cutting assembly; 21-Laser generator; 211-Laser; 3-Waste suction assembly; 31-Straight section suction surface; 311-Straight section belt; 312-Inclined section belt; 32-Inclined section suction surface; 4-Waste receiving assembly; 41-Suction port; 5-Shielding component; 51-Smoothing section; 52-First guide section; 53-Second guide section; 54-First connector; 100-Die-cutting mechanism; 200-Cell winding equipment; a-Angle; B-Electrode tab; F1-First direction; F2-Second direction; FL-Waste; L-Strip; L1- First material strip segment; L2 - Second material strip segment; Q1 - First tangent; Q2 - Second tangent; S1 - First male tangent; S2 - Second male tangent; W - Material strip turning position. Detailed Implementation

[0046] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0047] In this disclosure, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this disclosure and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0048] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain circumstances to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this disclosure according to the specific circumstances.

[0049] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection via an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this disclosure according to the specific circumstances.

[0050] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0051] The technical solutions of this disclosure will be further described below with reference to specific embodiments and accompanying drawings.

[0052] This disclosure provides a die-cutting mechanism 100, as shown in Figures 1 and 2. The die-cutting mechanism 100 includes: a strip guiding assembly 1, a die-cutting assembly 2, a waste suction assembly 3, a waste receiving assembly 4, and a blocking member 5. The strip guiding assembly 1 guides the strip L so that the strip L can be conveyed downstream along a first direction F1 for a preset distance and then along a second direction F2 different from the first direction F1. The position where the strip L changes from the first direction F1 to the second direction F2 is the strip turning position W. The die-cutting assembly 2 is used to die-cut the waste material FL on the strip L upstream of the strip turning position W, so that the waste material FL... An electrode tab B is formed on the belt L. The waste suction assembly 3 is opposite to the belt L to adsorb waste FL and electrode tab B to the waste suction assembly 3. The waste receiving assembly 4 has an adsorption port 41. The waste receiving assembly 4 is used to adsorb the waste FL on the waste suction assembly 3 to the waste receiving assembly 4 through the adsorption port 41. The blocking member 5 is located downstream of the belt turning position W and between the adsorption port 41 and the belt L. The blocking member 5 is used to reduce the adsorption force of the adsorption port 41 on the belt L. The belt L conveyed along the first direction F1 is the first belt segment L1, and the belt L conveyed along the second direction F2 is the second belt segment L2.

[0053] In this embodiment, when the die-cutting mechanism 100 performs die-cutting on the strip L, the strip L first passes through the strip guide component 1. During the process of the strip L passing through the strip guide component 1, under the guidance of the strip guide component 1, the strip L can be conveyed along the first direction F1 for a preset distance and then conveyed downstream in the second direction F2. Since the second direction F2 is different from the first direction F1, the position on the strip L that turns from the first direction F1 to the second direction F2 will form a strip turning position W. In other words, a strip turning position W will appear at the junction of the first strip segment L1 and the second strip segment L2.

[0054] During the conveying of the material strip L, the waste material FL on the material strip L can be die-cut by the die-cutting component 2, so that the tab B is formed on the material strip L. After the tab B is formed on the material strip L, since the waste suction component 3 is opposite to the material strip L, the waste material FL and the tab B on the material strip L can be adsorbed by the waste suction component 3, so that the waste material FL and the tab B leave the material strip L and are attached to the waste suction component 3.

[0055] When both tab B and waste FL are attached to the waste suction assembly 3, when the first material belt segment L1 continues to be conveyed downstream along the second direction F2 after passing the material belt turning point W, the first material belt segment L1 will start to pull the tab B connected to it along the second direction F2 at the material belt turning point W, so that the tab B is peeled off from the waste suction assembly 3 (see Figure 3), thereby separating the tab B from the waste FL. The material belt turning point W is the peeling point where the tab B begins to peel off from the waste suction assembly 3.

[0056] After the waste material FL leaves the conveyor belt L and adheres to the waste suction assembly 3, the waste receiving assembly 4 can absorb the waste material FL through the suction port 41, thereby recycling the waste material FL and preventing the waste material FL from falling to the ground.

[0057] During the process of the waste receiving assembly 4 adsorbing the waste FL from the waste suction assembly 3 into the waste receiving assembly 4 through the suction port 41, the material strip L will inevitably be subject to the adsorption force from the suction port 41. When the material strip L is subject to the adsorption force from the suction port 41, the tab B connected to the material strip L will also be subject to the adsorption force from the suction port 41, which may cause the tab B to fold or lift up. By setting a blocking member 5 between the suction port 41 and the material strip L, the blocking member 5 can reduce the adsorption force of the suction port 41 on the material strip L, and thus reduce the adsorption force of the suction port 41 on the tab B, thereby preventing the tab B from folding or lifting up, and making the tab B more flat.

[0058] Based on this, when the die-cutting mechanism 100 is applied to the cell winding equipment 200 and the material strip L is the electrode strip, it can avoid or reduce the occurrence of electrode tab folding or warping, thereby making the electrode tab flatter and thus making the cell produced by the cell winding equipment 200 of better quality.

[0059] Of course, the use of electrode strip L as an electrode strip is only one possible interpretation of strip L in this embodiment. In other application scenarios, strip L can also be other possible strips, such as diaphragm strips, etc. This embodiment does not limit this.

[0060] The waste receiving component 4 mentioned above may include, but is not limited to, a negative pressure waste suction bucket; this embodiment does not limit this.

[0061] In some embodiments, referring to Figures 1 and 4, the waste suction assembly 3 includes: a straight section adsorption surface 31, which is parallel to and opposite to the material belt L conveyed along the first direction F1 to adsorb waste FL and tab B, and the orthogonal projection of the material belt turning position W toward the straight section adsorption surface 31 is at least partially located within the straight section adsorption surface 31.

[0062] Since the orthographic projection of the material belt turning position W toward the straight section adsorption surface 31 is at least partially located within the straight section adsorption surface 31, that is, the peeling position from which the tab B peels off from the straight section adsorption surface 31 is exactly opposite to the straight section adsorption surface 31 in the direction perpendicular to the straight section adsorption surface 31. Compared with the inclined section adsorption surface 32 that is inclined to the first material belt segment L1, the straight section adsorption surface 31, which is parallel to the first material belt segment L1, is closer to the material belt turning position W. The tab B can be conveyed along the second direction F2 with the material belt L by moving a shorter distance. Therefore, it can avoid or reduce the situation where the tab B tilts toward the straight section adsorption surface 31 during the peeling process from the straight section adsorption surface 31, causing the tab B to fold or lift up, thereby making the tab B flatter.

[0063] It is worth noting that the statement that the straight section adsorption surface 31 is parallel to the material belt L conveyed along the first direction F1 can be interpreted in a broad sense. Specifically, the statement that the straight section adsorption surface 31 is approximately parallel to the material belt L conveyed along the first direction F1 can also be considered as the straight section adsorption surface 31 being parallel to the material belt L conveyed along the first direction F1. This embodiment does not impose a narrow definition on this.

[0064] In some embodiments, referring to Figures 1 and 4, the waste suction assembly 3 further includes: an inclined section adsorption surface 32, which is connected to and located downstream of the straight section adsorption surface 31. Along the first direction F1, the inclined section adsorption surface 32 is inclined in a direction that gradually moves away from the first material strip segment L1. The straight section adsorption surface 31 is used to convey waste FL to the inclined section adsorption surface 32. The waste receiving assembly 4 is used to adsorb the waste FL on the inclined section adsorption surface 32 into the waste receiving assembly 4 through the adsorption port 41. The first material strip segment L1 is the material strip L conveyed along the first direction F1.

[0065] Since the inclined adsorption surface 32 is inclined in a direction that gradually moves away from the first material strip L1 along the first direction F1, the distance between the waste material FL and the second material strip L2 in the direction perpendicular to the inclined adsorption surface 32 gradually increases during the process of the waste material FL being conveyed from the straight adsorption surface 31 to the inclined adsorption surface 32. This can prevent the waste material FL from interfering with the second material strip L2 during the conveying process.

[0066] In addition, by transferring the waste FL from the straight section adsorption surface 31 to the inclined section adsorption surface 32, the accumulation of waste FL on the straight section adsorption surface 31 can be avoided.

[0067] In some embodiments, referring to FIG4, the waste suction assembly 3 is a vacuum belt, which includes a straight section belt 311 and an inclined section belt 312. The inclined section adsorption surface 32 is the belt surface of the inclined section belt 312, and the straight section adsorption surface 31 is the belt surface of the straight section belt 311.

[0068] When the waste suction assembly 3 is a vacuum belt, since the vacuum belt has the function of suctioning waste FL and conveying the waste FL adsorbed on it, it can achieve the purpose of suctioning waste FL and conveying waste FL from the straight section adsorption surface 31 to the inclined section adsorption surface 32. Since the structure of the vacuum belt is simple, the structure of the waste suction assembly 3 can be simplified.

[0069] Of course, in other embodiments, the waste suction component 3 can also be other possible structures, as long as it can achieve the purpose of adsorbing the waste FL onto it. This embodiment does not limit the waste suction component 3.

[0070] In some embodiments, referring to Figure 1, the angle α between the second material strip segment L2 and the first material strip segment L1 is an obtuse angle. By making the angle α between the second material strip segment L2 and the first material strip segment L1 an obtuse angle, the transition of the material strip L from conveying along the first direction F1 to conveying along the second direction F2 can be relatively gradual, and the conveying direction will not change drastically. This allows the tab B to peel off slowly from the adsorption surface 31 of the straight section rather than peeling off very quickly. In this way, time can be allowed for the tab B to slowly deform and follow the first material strip segment L1 downstream along the second direction F2. This can better avoid or reduce the occurrence of the tab B tilting towards the adsorption surface 31 during the peeling process, which could cause the tab B to fold or lift up.

[0071] Of course, in other embodiments, the included angle α between the second strip segment L2 and the first strip segment L1 can also be an acute angle or a right angle, etc., and this embodiment does not limit this.

[0072] It should be noted that there are multiple ways to implement the above-mentioned material belt guiding component 1. As long as it can guide the material belt L so that the material belt L can be conveyed downstream along the first direction F1 for a preset distance and then conveyed downstream along the second direction F2, which is different from the first direction F1, the implementation method of the material belt guiding component 1 in this embodiment is not specifically limited. In one possible implementation, referring to Figures 1 and 2, the strip guiding assembly 1 includes a first guide roller 11 and a second guide roller 12, wherein the first guide roller 11 is located upstream of the die-cutting assembly 2, and the second guide roller 12 is located downstream of the die-cutting assembly 2. The first common tangent surface S1 of the first guide roller 11 and the second guide roller 12 is located between the first guide roller 11 and the second guide roller 12. The first direction F1 is located on the first common tangent surface S1. The tangent line of the first common tangent surface S1 on the first guide roller 11 is the first tangent line Q1, and the tangent line on the second guide roller 12 is the second tangent line Q2. The strip L passes around the first guide roller 11 and the second guide roller 12 along the first common tangent surface S1. The strip L located between the first tangent line Q1 and the second tangent line Q2 is conveyed along the first direction F1, and the strip L located downstream of the second tangent line Q2 is conveyed along the second direction F2. The position on the strip L corresponding to the second tangent line Q2 is the strip turning position W.

[0073] Since the first guide roller 11 is located upstream of the die-cutting assembly 2 and the second guide roller 12 is located downstream of the die-cutting assembly 2, the first common tangent surface S1 of the first guide roller 11 and the second guide roller 12 is located between the first guide roller 11 and the second guide roller 12. Since the first direction F1 is located on the first common tangent surface S1, by making the material strip L bypass the first guide roller 11 and the second guide roller 12 along the first common tangent surface S1, under the guidance of the first guide roller 11 and the second guide roller 12, it is possible to make the material strip L be conveyed along the first direction F1 for a preset distance and then conveyed downstream along the second direction F2, which is different from the first direction F1. The implementation method is simple, which can simplify the structure of the material strip guiding assembly 1 and reduce the cost of the material strip guiding assembly 1.

[0074] In order to make the tab B peel off more smoothly from the adsorption surface 31 of the straight section, in some embodiments, referring to FIG1, the waste suction assembly 3 is located on the side of the material belt L opposite to the second guide roller 12.

[0075] By positioning the waste suction assembly 3 on the side of the material belt L away from the second guide roller 12, the material belt L can be positioned between the second guide roller 12 and the waste suction assembly 3. With this configuration, when the material belt L is switched from being conveyed along the first direction F1 to being conveyed along the second direction F2, the tab B can be peeled off from the straight section adsorption surface 31 more smoothly.

[0076] To prevent friction damage to the material strip L caused by friction between it and the straight section adsorption surface 31 during conveying, in some embodiments, referring to Figures 1, 2, and 4, the distance between the second tangent Q2 and the straight section adsorption surface 31 is 1mm-2mm. By making the distance between the second tangent Q2 and the straight section adsorption surface 31 1mm-2mm, a certain distance can be maintained between the second guide roller 12 and the straight section adsorption surface 31, thus preventing friction between the material strip L and the straight section adsorption surface 31 during conveying.

[0077] Specifically, the distance between the second tangent Q2 and the adsorption surface 31 of the straight segment can be 1 mm, 1.5 or 2 mm, etc., and this embodiment does not limit this.

[0078] To reduce the wrap angle of the strip L on the second guide roller 12, and thus better avoid or reduce the occurrence of tab B folding or warping, in some embodiments, referring to FIG1, the strip guiding assembly 1 further includes: a third guide roller 13, the third guide roller 13 being located downstream of the second guide roller 12, the second common tangent surface S2 of the third guide roller 13 and the second guide roller 12 being located on the same side of the second guide roller 12 and the third guide roller 13, the second direction F2 being located on the second common tangent surface S2, the third guide roller 13 and the second guide roller 12 being used to guide the strip L to be conveyed along the second direction F2, and the included angle α between the second common tangent surface S2 and the first common tangent surface S1 being an obtuse angle.

[0079] Since the second common tangent surface S2 of the third guide roller 13 and the second guide roller 12 is located on the same side of the second guide roller 12 and the third guide roller 13, and the second direction F2 is located on the second common tangent surface S2, when the material strip L passes around the second guide roller 12 and the third guide roller 13 within the second common tangent surface S2 and is conveyed along the second direction F2, the third guide roller 13 can guide the conveying direction of the material strip L to ensure that the material strip L can be conveyed along the second direction F2. Since the included angle α between the second common tangent surface S2 and the first common tangent surface S1 is an obtuse angle, the wrap angle of the material strip L on the second guide roller 12 when it passes around the second guide roller 12 is smaller, thereby better avoiding or reducing the occurrence of tab B folding or warping.

[0080] In some embodiments, referring to FIG1, the diameter of the first guide roller 11 is equal to the diameter of the second guide roller 12; and / or, the diameter of the second guide roller 12 is equal to the diameter of the third guide roller 13.

[0081] This configuration ensures a high degree of consistency in the diameters of the first guide roller 11, the second guide roller 12, and the third guide roller 13, facilitating subsequent batch processing and thus reducing costs.

[0082] Of course, in other embodiments, the diameters of the first guide roller 11, the second guide roller 12, and the third guide roller 13 may be different from each other, and this embodiment does not limit this.

[0083] In some embodiments, referring to FIG1, the first guide roller 11 and the second guide roller 12 are parallel to each other; and / or, the second guide roller 12 and the third guide roller 13 are parallel to each other.

[0084] By making the first guide roller 11 and the second guide roller 12 parallel to each other, the conveying of the material strip L around the first guide roller 11 and the second guide roller 12 can be made smoother and more stable. Similarly, by making the second guide roller 12 and the third guide roller 13 parallel to each other, the conveying of the material strip L around the second guide roller 12 and the third guide roller 13 can be made smoother and more stable.

[0085] In some embodiments, referring to Figures 1 and 2, the die-cutting assembly 2 includes a laser generator 21, which is opposite to the strip L conveyed along the first direction F1, and is used to emit a laser 211 to die-cut waste material FL.

[0086] Since the laser generator 21 can cut the waste material FL on the strip L by laser 211 die cutting, and the laser 211 does not need to directly contact the strip L when die cutting the waste material FL on the strip L and the cutting speed is faster, the structure of the die cutting component 2 can be simplified and the die cutting efficiency of the die cutting component 2 can be accelerated.

[0087] Of course, in other embodiments, the die-cutting component 2 may also include a cutter. When the die-cutting component 2 includes a cutter, the waste material FL on the strip L can be cut by the cutter. This embodiment does not limit this.

[0088] To improve the die-cutting quality of the waste material FL on the strip L when the laser generator 21 is die-cutting, in some embodiments, referring to Figure 1, the direction of the laser 211 is perpendicular to the first direction F1. When the direction of the laser 211 is perpendicular to the first direction F1, the direction of the laser 211 can be made perpendicular to the strip L, thereby allowing the laser 211 to cut the waste material FL on the strip L better, resulting in better die-cutting quality when the laser generator 21 is die-cutting the waste material FL on the strip L.

[0089] Of course, in other embodiments, the direction of the laser 211 and the first direction F1 may have other angles, such as 80°, 84° or 85°, etc. This embodiment does not limit this.

[0090] In some embodiments, referring to Figures 1 and 5, the shielding member 5 includes a smoothing section 51 located on the conveying track of the second material strip segment L2, which is a material strip L conveyed along the second direction F2.

[0091] Since the smoothing section 51 is located on the conveying track of the second material belt section L2, when the second material belt section L2 is conveyed along the conveying track, even if the tab B is folded or raised, the smoothing section 51 can smooth the tab B connected to the second material belt section L2, thereby better avoiding or reducing the occurrence of tab B folding or raising.

[0092] The smoothing section 51 is a flat plate structure. When the smoothing section 51 is a flat plate structure, the smoothing effect is better. Of course, the smoothing section 51 can also be other possible shapes, which are not limited in this embodiment.

[0093] In some embodiments, referring to Figures 1 and 5, the shielding member 5 further includes: a first guide section 52, which is connected upstream of the smoothing section 51 and points upstream from the downstream of the smoothing section 51, and the first guide section 52 is inclined in a direction that gradually moves away from the second material strip section L2.

[0094] Since the first guide section 52 is connected upstream of the smoothing section 51 and points upstream from downstream of the smoothing section 51, the first guide section 52 is inclined in a direction that gradually moves away from the second material strip section L2. Therefore, the distance between the end of the first guide section 52 away from the smoothing section 51 and the second material strip section L2 can be relatively large. With this setting, on the one hand, the first guide section 52 can gradually guide the second material strip section L2 to be conveyed to the smoothing section 51, making the process of the second material strip section L2 being conveyed to the smoothing section 51 through the first guide section 52 smoothing section 51 smoother. On the other hand, it can also avoid the situation where the first guide section 52 and the second material strip section L2 rub against each other, causing damage to the second material strip section L2.

[0095] In some embodiments, referring to Figures 1 and 5, the shielding member 5 further includes: a second guide section 53, which is connected downstream of the smoothing section 51 and points downstream from the upstream of the smoothing section 51, and the second guide section 53 is inclined in a direction that gradually moves away from the second material strip section L2.

[0096] By connecting the second guide section 53 downstream of the smoothing section 51 and pointing downstream from the smoothing section 51, the second guide section 53 is tilted in a direction that gradually moves away from the second material strip section L2. This allows the end of the second guide section 53 that is away from the smoothing section 51 to be farther away from the second material strip section L2, thereby avoiding the situation where the second guide section 53 rubs against the second material strip section L2 and causes damage to the second material strip section L2.

[0097] In some embodiments, referring to FIG5, the shield 5 is adjustablely disposed in a direction close to or away from the conveyor belt L.

[0098] By adjusting the shielding member 5 in a direction that is closer to or further away from the material strip L, on the one hand, the smoothing effect of the shielding member 5 on the tabs B on the material strip L can be strengthened or weakened by adjusting the direction of the shielding member 5 in a direction that is closer to or further away from the material strip L. Therefore, the smoothing intensity of the shielding member 5 on the tabs B on the material strip L can be flexibly adjusted. On the other hand, the position of the shielding member 5 can also be flexibly adjusted according to the adsorption force of the adsorption port 41 on the material strip L, so that it can better shield between the material strip L and the adsorption port 41, thereby better preventing the tabs B from folding or lifting.

[0099] It should be noted that there are multiple ways to adjust the above-mentioned shielding member 5 in the direction of approaching or moving away from the material belt L. In one possible implementation, referring to Figures 1 and 5, the shielding member 5 may be provided with a first connecting member 54, and the third guide roller 13 may be provided with a second connecting member 131. By adjusting the first connecting member 54 to the second connecting member 131 in the direction of approaching or moving away from the peripheral wall of the third guide roller 13, the purpose of adjusting the shielding member 5 in the direction of approaching or moving away from the material belt L can be achieved.

[0100] Of course, other methods can also be used to achieve the purpose of adjusting the setting of the shielding member 5 in the direction of approaching or moving away from the material strip L, which will not be listed here in this embodiment.

[0101] In this embodiment, the first connector 54 and the second connector 131 can both be connecting blocks or connecting plates, etc., and this embodiment does not limit them.

[0102] This disclosure also provides a battery cell winding apparatus 200, as shown in FIG6, the battery cell winding apparatus 200 including a die-cutting mechanism 100.

[0103] The structure of the die-cutting mechanism 100 can be the same as that of any of the die-cutting mechanisms 100 described in the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description of the die-cutting mechanism 100 in the above embodiments. This embodiment will not repeat the description here.

[0104] In this embodiment, since the die-cutting mechanism 100 can prevent the tabs from folding or lifting, when the cell winding equipment 200 includes the die-cutting mechanism 100, the quality of the cell produced by the cell winding equipment 200 can be better, and the tabs will not fold or lift.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A die-cutting mechanism (100), comprising: The material belt guiding component (1) is used to guide the material belt (L) so that the material belt (L) can be conveyed downstream along a first direction (F1) for a preset distance and then along a second direction (F2) different from the first direction (F1). The position where the material belt (L) turns from the first direction (F1) to the second direction (F2) is the material belt turning position (W). Die-cutting assembly (2) is used to die-cut waste material (FL) on the strip (L) upstream of the strip turning position (W) to form tabs (B) on the strip (L); Waste suction assembly (3), which is opposite to the material belt (L) to adsorb the waste (FL) and the tab (B) to the waste suction assembly (3); Waste receiving assembly (4), the waste receiving assembly (4) having an adsorption port (41), the waste receiving assembly (4) being used to adsorb the waste (FL) on the waste suction assembly (3) into the waste receiving assembly (4) through the adsorption port (41); and, A shielding member (5) is located downstream of the material belt turning position (W) and between the adsorption port (41) and the material belt (L). The shielding member (5) is used to reduce the adsorption force of the adsorption port (41) on the material belt (L).

2. The die-cutting mechanism (100) according to claim 1, wherein, The shielding member (5) includes a smoothing section (51) located on the conveying track of the second material strip section (L2), which is a material strip (L) conveyed along the second direction (F2).

3. The die-cutting mechanism (100) according to claim 2, wherein, The shielding member (5) also includes: The first guide section (52) is connected upstream of the smoothing section (51) and points upstream from the downstream of the smoothing section (51). The first guide section (52) is inclined in a direction that gradually moves away from the second material strip section (L2).

4. The die-cutting mechanism (100) according to claim 2 or 3, wherein, The shielding member (5) also includes: The second guide section (53) is connected downstream of the smoothing section (51) and points downstream from the upstream of the smoothing section (51). The second guide section (53) is inclined in a direction that gradually moves away from the second material strip section (L2).

5. The die-cutting mechanism (100) according to any one of claims 2-4, wherein, The smoothing section (51) has a flat plate structure.

6. The die-cutting mechanism (100) according to claim 1, wherein, The shielding member (5) is adjustable in the direction of being close to or away from the material strip (L).

7. The die-cutting mechanism (100) according to any one of claims 1-6, wherein, The waste suction assembly (3) includes: A straight segment adsorption surface (31) is parallel to and opposite to the material strip (L) conveyed along the first direction (F1) to adsorb the waste material (FL) and the tab (B). The orthographic projection of the material strip turning position (W) toward the straight segment adsorption surface (31) is at least partially located within the straight segment adsorption surface (31).

8. The die-cutting mechanism (100) according to claim 7, wherein, The waste suction assembly (3) also includes: An inclined adsorption surface (32) is connected to the straight adsorption surface (31) and located downstream of the straight adsorption surface (31). Along the first direction (F1), the inclined adsorption surface (32) is inclined in a direction that gradually moves away from the first material strip segment (L1). The straight adsorption surface (31) is used to convey the waste material (FL) to the inclined adsorption surface (32). The waste receiving assembly (4) is used to adsorb the waste material (FL) on the inclined adsorption surface (32) into the waste receiving assembly (4) through the adsorption port (41). The first material strip segment (L1) is a material strip (L) conveyed along the first direction (F1).

9. The die-cutting mechanism (100) according to any one of claims 1-6 or 8, wherein, The strip guiding assembly (1) includes: A first guide roller (11) is located upstream of the die-cutting assembly (2); and, The second guide roller (12) is located downstream of the die-cutting assembly (2). The first common tangent (S1) of the first guide roller (11) and the second guide roller (12) is located between the first guide roller (11) and the second guide roller (12). The first direction (F1) is located on the first common tangent (S1). The tangent of the first common tangent (S1) on the first guide roller (11) is the first tangent (Q1), and the tangent on the second guide roller (12) is the second tangent (Q2). The strip (L) passes around the first guide roller (11) and the second guide roller (12) along the first common tangent (S1). The strip (L) located between the first tangent (Q1) and the second tangent (Q2) is conveyed along the first direction (F1). The strip (L) located downstream of the second tangent (Q2) is conveyed along the second direction (F2). The position on the strip (L) corresponding to the second tangent (Q2) is the strip turning position (W).

10. The die-cutting mechanism (100) according to claim 9, wherein, The waste suction assembly (3) is located on the side of the material belt (L) away from the second guide roller (12).

11. The die-cutting mechanism (100) according to claim 9, wherein, The strip guiding assembly (1) further includes: The third guide roller (13) is located downstream of the second guide roller (12). The second common tangent (S2) of the third guide roller (13) and the second guide roller (12) is located on the same side of the second guide roller (12) and the third guide roller (13). The second direction (F2) is located on the second common tangent (S2). The third guide roller (13) and the second guide roller (12) are used to guide the material belt (L) to be conveyed along the second direction (F2). The included angle (a) between the second common tangent (S2) and the first common tangent (S1) is an obtuse angle.

12. The die-cutting mechanism (100) according to claim 11, wherein, The diameter of the first guide roller (11) is equal to the diameter of the second guide roller (12); and / or, the diameter of the second guide roller (12) is equal to the diameter of the third guide roller (13).

13. The die-cutting mechanism (100) according to any one of claims 1-6, 8, or 10-12, wherein, The die-cutting assembly (2) includes: A laser generator (21), which is opposite to the strip (L) conveyed along the first direction (F1), is used to emit a laser (211) to die-cut the waste (FL).

14. A battery cell winding apparatus, comprising the die-cutting mechanism (100) according to any one of claims 1-13.

Images