Die cutting mechanism and battery cell winding equipment

Abstract

The utility model relates to the technical field of battery processing equipment, in particular to a die cutting mechanism and battery cell winding equipment, and the die cutting mechanism comprises a material belt guiding assembly which is used for guiding a material belt so that the material belt can be conveyed downstream in a second direction different from a first direction after being conveyed by a preset distance in the first direction, the position where the material belt turns from the first direction to the second direction is a material belt turning position; the die cutting assembly is used for carrying out die cutting on waste materials on the material belt at the upstream of the material belt steering position, so that a tab is formed on the material belt; and the waste material absorbing assembly comprises a linear section absorbing surface, the linear section absorbing surface is parallel to and opposite to the material belt conveyed in the first direction so as to absorb waste materials and tabs, and at least part of orthographic projection, facing the linear section absorbing surface, of the steering position of the material belt is located in the linear section absorbing surface. According to the die cutting mechanism provided by the invention, the tabs can be relatively flat, so that the quality of battery cells is relatively good.

Description

Technical Field

[0001] The present application relates to the technical field of battery processing equipment, and in particular to a die-cutting mechanism and a battery cell winding device. Background Art

[0002] The die-cutting mechanism is a mechanism that produces a pole ear on a pole piece by laser cutting, thereby turning the pole piece into a pole piece with a pole ear.

[0003] After the pole piece is transformed into a pole piece with a pole ear, the pole piece with a pole ear needs to be transferred to the winding needle downstream for winding to make a battery cell. When the plane where the pole ear is located is coplanar with the plane where the body of the pole piece with a pole ear is located, the quality of the battery cell formed by winding will be better. However, in the actual operation process, when the pole piece with a pole ear is transferred downstream, the pole ear often folds or tilts relative to the body of the pole piece with a pole ear, which leads to poor quality of the battery cell formed by winding. Utility Model Content

[0004] The present application discloses a die-cutting mechanism and a battery cell winding device, which can make the pole ear relatively flat, thereby improving the quality of the battery cell.

[0005] In order to achieve the above objectives, in a first aspect, the present application discloses a die-cutting mechanism, comprising:

[0006] A material belt guiding assembly, the material belt guiding assembly is used to guide the material belt so that the material belt can be conveyed in a first direction for a preset distance and then conveyed downstream in a second direction different from the first direction, and the position where the material belt turns from the first direction to the second direction is the material belt turning position;

[0007] A die-cutting assembly, the die-cutting assembly being used for die-cutting waste material on the material strip upstream of the material strip turning position so as to form a tab on the material strip; and

[0008] A waste suction component, the waste suction component includes a straight segment suction surface, the straight segment suction surface is parallel to and opposite to the material belt conveyed along the first direction to suction the waste and the pole ear, and the positive projection of the material belt turning position toward the straight segment suction surface is at least partially located within the straight segment suction surface.

[0009] Since the positive projection of the turning position of the material strip toward the straight segment adsorption surface is at least partially located on the straight segment adsorption surface, that is, the peeling position where the pole ear starts to peel off from the straight segment adsorption surface is exactly opposite to the straight segment adsorption surface in the direction perpendicular to the straight segment adsorption surface, and the straight segment adsorption surface parallel to the first material strip segment is closer to the turning position of the material strip than the inclined segment adsorption surface inclined to the first material strip segment. The pole ear can move a shorter distance to follow the material strip along the second direction. Therefore, the situation in which the pole ear tilts toward the direction close to the straight segment adsorption surface during the process of peeling from the straight segment adsorption surface, causing the pole ear to fold or warp, can be avoided or reduced, thereby making the pole ear smoother.

[0010] Based on this, when the die-cutting mechanism is applied to the battery cell winding equipment and the material strip is the electrode sheet material strip, it can avoid or reduce the situation in which the electrode ear tilts toward the direction close to the straight line segment adsorption surface during the process of peeling off the straight line segment adsorption surface, causing the electrode ear to fold or warp, thereby making the electrode ear smoother, thereby improving the quality of the battery cell produced by the battery cell winding equipment.

[0011] Optionally, the strip guiding assembly comprises:

[0012] a first guide roller, the first guide roller being located upstream of the die cutting assembly; and,

[0013] A second guide roller, the second guide roller is located downstream of the die-cutting component, a first common tangent plane between 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 plane, a tangent line of the first common tangent plane on the first guide roller is a first tangent line, and a tangent line of the first common tangent plane on the second guide roller is a second tangent line, the material strip passes around the first guide roller and the second guide roller along the first common tangent plane, the material strip located between the first tangent line and the second tangent line is conveyed along the first direction, the material strip located downstream of the second tangent line is conveyed along the second direction, and the position on the material strip corresponding to the second tangent line is the material strip turning position.

[0014] Optionally, the waste material suction component is located on a side of the material belt facing away from the second guide roller.

[0015] Optionally, the distance between the second tangent line and the straight line segment adsorption surface is -.

[0016] Optionally, the strip guiding assembly further includes:

[0017] A third guide roller, wherein the third guide roller is located downstream of the second guide roller, a second common section plane between 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 section plane, the third guide roller and the second guide roller are used to guide the material strip to be transmitted along the second direction, and an angle between the second common section plane and the first common section plane is an obtuse angle.

[0018] 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.

[0019] Optionally, the die-cutting assembly comprises:

[0020] A laser generator is opposite to the material belt conveyed along the first direction and is used for emitting laser to die-cut the waste material.

[0021] Optionally, the waste suction component further comprises:

[0022] An inclined section adsorption surface, wherein the inclined section adsorption surface is connected to the straight section adsorption surface and is located downstream of the straight section adsorption surface. Along the first direction, the inclined section adsorption surface is inclined in a direction gradually away from the first material belt segment. The straight section adsorption surface is used to transfer the waste to the inclined section adsorption surface. The first material belt segment is a material belt transferred along the first direction.

[0023] Optionally, the die-cutting mechanism further comprises:

[0024] The waste receiving component has a suction port, which is opposite to the end of the inclined section suction surface that is away from the straight section suction surface. The waste receiving component is used to suck the waste on the inclined section suction surface into the waste receiving component through the suction port.

[0025] Optionally, the die-cutting mechanism further comprises:

[0026] A shielding member is located downstream of the turning position of the material belt and between the suction port and the material belt, and the shielding member is used to reduce the suction force of the suction port on the material belt.

[0027] Optionally, the shielding member includes a smoothing section, and the smoothing section is located on a conveying track of the material tape conveyed along the second direction.

[0028] Optionally, the shielding member further includes:

[0029] The first guide section is connected to the upstream of the smoothing section and points from the downstream of the smoothing section to the upstream direction. The first guide section is inclined in a direction gradually away from the second material belt section. The second material belt section is a material belt transmitted along the second direction.

[0030] Optionally, the shielding member further includes:

[0031] The second guide section is connected to the downstream of the smoothing section and points from the upstream of the smoothing section to the downstream, and the second guide section is inclined in a direction gradually away from the second material strip section.

[0032] Optionally, the shielding member is adjustably disposed in a direction approaching or moving away from the material strip.

[0033] In a second aspect, the present application discloses a battery cell winding device, comprising the die-cutting mechanism described in any one of the first aspects above.

[0034] Compared with the prior art, the beneficial effects of this application are:

[0035] In the present application, since the positive projection of the turning position of the material strip toward the straight segment adsorption surface is at least partially located on the straight segment adsorption surface, that is, the peeling position where the pole ear starts to peel off from the straight segment adsorption surface is exactly opposite to the straight segment adsorption surface in the direction perpendicular to the straight segment adsorption surface, and the straight segment adsorption surface parallel to the first material strip segment (the material strip when conveyed along the first direction) is closer to the turning position of the material strip than the inclined segment adsorption surface inclined to the first material strip segment. The pole ear can move a shorter distance to follow the material strip conveyed along the second direction. Therefore, the situation in which the pole ear tilts toward the direction close to the straight segment adsorption surface during the process of peeling from the straight segment adsorption surface, causing the pole ear to fold or warp, can be avoided or reduced, thereby making the pole ear smoother.

[0036] Based on this, when the die-cutting mechanism is applied to the battery cell winding equipment and the material strip is the electrode sheet material strip, it can avoid or reduce the situation in which the electrode ear tilts toward the direction close to the straight line segment adsorption surface during the process of peeling off the straight line segment adsorption surface, causing the electrode ear to fold or warp, thereby making the electrode ear smoother, thereby improving the quality of the battery cell produced by the battery cell winding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1AIt is a structural schematic diagram of a die-cutting mechanism in the related art;

[0039] Figure 1B It is a structural schematic diagram of a die-cutting mechanism provided in an embodiment of the present application;

[0040] Figure 2 yes Figure 1B A schematic diagram of the structure of the material belt and the material belt guide assembly;

[0041] Figure 3 yes Figure 1B A schematic diagram of the structure of the waste suction component;

[0042] Figure 4 yes Figure 2 Schematic diagram of the structure of the material belt and the material belt guide assembly (waste material is separated from the pole ear);

[0043] Figure 5 is a structural schematic diagram of another die-cutting mechanism provided in an embodiment of the present application;

[0044] Figure 6 is a structural schematic diagram of another die-cutting mechanism provided in an embodiment of the present application;

[0045] Figure 7 It is a structural schematic diagram of another die-cutting mechanism provided in an embodiment of the present application;

[0046] Figure 8 yes Figure 7 A schematic diagram of the structure of the shielding member;

[0047] Fig. 9 It is a structural schematic diagram of a battery cell winding device provided in an embodiment of the present application.

[0048] Description of main reference numerals

[0049] 1- material strip guide assembly; 11- first guide roller; 12- second guide roller; 13- third guide roller; 131- second connecting member;

[0050] 2-die cutting assembly; 21-laser generator; 211-laser;

[0051] 3-waste suction component; 31-straight segment suction surface; 311-straight segment belt; 312-inclined segment belt; 32-inclined segment suction surface;

[0052] 4-waste receiving assembly; 41-adsorption port;

[0053] 5-shielding member; 51-smoothing section; 52-first guide section; 53-second guide section; 54-first connecting member;

[0054] 100-die cutting mechanism; 200-battery cell winding equipment;

[0055] a-included angle; B-ear; F1-first direction; F2-second direction; FL-waste; L-material strip; L1-first material strip segment; L2-second material strip segment; Q1-first tangent line; Q2-second tangent line; S1-first common section; S2-second common section; W-material strip turning position. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0058] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0059] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0061] Before explaining the technical solution of the present application, the technical background of the present application is first explained.

[0062] See also Figure 1A First, the material belt guiding component 1 guides the material belt L to be transmitted along the first direction F1 for a preset distance and then transmitted downstream along the second direction F2 which is different from the first direction F1, wherein 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.

[0063] Before the material strip L passes through the material strip turning position W, the waste material FL on the material strip L conveyed along the first direction F1 can be die-cut by the die-cutting component 2 to form a tab B on the material strip L. Then, the waste material FL and the tab B can be adsorbed thereon by the inclined section adsorption surface 32 of the waste material adsorption component 3.

[0064] On the premise that the waste material FL and the tab B are adsorbed on the inclined section adsorption surface 32 , the tab B can be peeled off from the inclined section adsorption surface 32 by transferring the material strip L along the second direction F2 .

[0065] However, since the turning position W of the material strip is far away from the inclined section adsorption surface 32, the pole ear B needs to move a long distance after being peeled off from the inclined section adsorption surface 32 before it can be transmitted along the second direction F2 with the material strip L. In this process, it is easy for the pole ear B to fold or warp. Based on this, a die-cutting mechanism and a battery cell winding equipment are urgently needed to solve this technical problem.

[0066] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings.

[0067] The present application provides a die-cutting mechanism 100, see Figure 1B and Figure 2 The die-cutting mechanism 100 includes a material strip guiding component 1, a die-cutting component 2 and a waste material suction component 3, wherein the material strip guiding component 1 is used to guide the material strip L so that the material strip L can be conveyed along a first direction F1 for a preset distance and then conveyed downstream along a second direction F2 different from the first direction F1. The position where the material strip L turns from the first direction F1 to the second direction F2 is the material strip turning position W. The die-cutting component 2 is used to die-cut the waste material FL on the material strip L conveyed along the first direction F1 so that the tab B is formed on the material strip L. Figure 1B and Figure 3 The waste suction component 3 includes a straight-segment suction surface 31, which is parallel to and opposite to the material belt L conveyed along the first direction F1 to absorb the waste FL and the tab B. The positive projection of the material belt turning position W toward the straight-segment suction surface 31 is at least partially located within the straight-segment suction surface 31, wherein the material belt L conveyed along the first direction F1 is the first material belt segment L1, and the material belt L conveyed along the second direction F2 is the second material belt segment L2.

[0068] In the present embodiment, when the die-cutting operation is performed on the material strip L by the die-cutting mechanism 100, first, the material strip L can be made to pass through the material strip guiding assembly 1. During the process of the material strip L passing through the material strip guiding assembly 1, under the guidance of the material strip guiding assembly 1, the material 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, a material strip turning position W will be formed at the position where the material strip L turns from the first direction F1 to the second direction F2. In other words, a material strip turning position W will appear at the junction of the first material strip segment L1 and the second material strip segment L2.

[0069] During the conveying process of the material strip L, the waste FL on the material strip L can be die-cut by the die-cutting assembly 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 straight segment adsorption surface 31 of the waste material adsorption assembly 3 is parallel to and opposite to the material strip L conveyed along the first direction F1, that is, the straight segment adsorption surface 31 of the waste material adsorption assembly 3 is parallel to and opposite to the first material strip segment L1, the waste FL and the tab B on the first material strip segment L1 can be adsorbed by the straight segment adsorption surface 31, so that the waste FL and the tab B leave the first material strip segment L1 and adhere to the straight segment adsorption surface 31.

[0070] In the case where both the tab B and the waste material FL are attached to the straight segment adsorption surface 31, when the first material strip segment L1 passes through the material strip turning position W and continues to be transferred downstream along the second direction F2, the first material strip segment L1 will start to pull the tab B connected thereto at the material strip turning position W and transfer it along the second direction F2, so that the tab B is peeled off from the straight segment adsorption surface 31 (see Figure 4 ), thereby separating the tab B from the waste material FL, and the material strip turning position W is the peeling position where the tab B starts to peel off from the straight line adsorption surface 31.

[0071] Since the positive projection of the material strip turning position W toward the straight segment adsorption surface 31 is at least partially located on the straight segment adsorption surface 31, that is, the peeling position where the pole ear B starts to peel off from the straight segment adsorption surface 31 is exactly opposite to the straight segment adsorption surface 31 in the direction perpendicular to the straight segment adsorption surface 31, and the straight segment adsorption surface 31 parallel to the first material strip segment L1 is closer to the material strip turning position W than the inclined segment adsorption surface 32 inclined to the first material strip segment L1. The pole ear B can move a shorter distance to follow the material strip L in the second direction F2. Therefore, the situation in which the pole ear B tilts toward the direction close to the straight segment adsorption surface 31 during the process of peeling from the straight segment adsorption surface 31, causing the pole ear B to fold or warp, can be avoided or reduced, thereby making the pole ear B flatter.

[0072] Based on this, when the die-cutting mechanism 100 is applied to the battery cell winding equipment 200 and the material strip L is a pole piece material strip, it can avoid or reduce the situation in which the pole ear is tilted toward the direction close to the straight segment adsorption surface 31 during the process of peeling off the straight segment adsorption surface 31, causing the pole ear to fold or warp, thereby making the pole ear smoother, thereby improving the quality of the battery cell produced by the battery cell winding equipment 200.

[0073] Of course, the material strip L being a pole piece material strip is only one possible understanding of the material strip L given in this embodiment. Of course, in other application scenarios, the material strip L may also be other possible material strips, such as a diaphragm material strip, etc. This embodiment does not limit this.

[0074] It is worth noting that the straight line segment adsorption surface 31 mentioned above is parallel to the material belt L conveyed along the first direction F1, which can be understood in a broad sense. The straight line segment adsorption surface 31 is roughly parallel to the material belt L conveyed along the first direction F1, which can also be considered as the straight line segment adsorption surface 31 is parallel to the material belt L conveyed along the first direction F1. This embodiment does not make a narrow limitation on this.

[0075] In some embodiments, see Figure 1B , the angle a between the second material strip segment L2 and the first material strip segment L1 is an obtuse angle. By making the angle a between the second material strip segment L2 and the first material strip segment L1 an obtuse angle, the material strip L can be smoothly converted from being transmitted along the first direction F1 to being transmitted along the second direction F2, and the transmission direction will not change drastically, so that the tab B can be slowly peeled off from the straight segment adsorption surface 31 instead of being peeled off very quickly. In this way, time can be reserved for the tab B to slowly deform and follow the first material strip segment L1 to be transmitted downstream along the second direction F2, so as to better avoid or reduce the tab B from tilting in the direction close to the straight segment adsorption surface 31 during the process of being peeled off from the straight segment adsorption surface 31, causing the tab B to fold or warp.

[0076] Of course, in other embodiments, the angle a between the second material strip segment L2 and the first material strip segment L1 may also be an acute angle or a right angle, etc., which is not limited in this embodiment.

[0077] It should be noted that there are many implementation methods for the above-mentioned material belt guiding assembly 1, and it is sufficient as long as it can guide the material belt L so that the material belt L can be conveyed along the first direction F1 for a preset distance and then conveyed downstream along the second direction F2 different from the first direction F1. The implementation method of the material belt guiding assembly 1 in this embodiment is not specifically limited. In one of the possible implementation methods, see Figure 1B and Figure 2The material strip guiding assembly 1 comprises: a first guiding roller 11 and a second guiding roller 12, wherein the first guiding roller 11 is located upstream of the die-cutting assembly 2, and the second guiding roller 12 is located downstream of the die-cutting assembly 2, a first common section S1 between the first guiding roller 11 and the second guiding roller 12 is located between the first guiding roller 11 and the second guiding roller 12, a first direction F1 is located on the first common section S1, a tangent of the first common section S1 on the first guiding roller 11 is a first tangent Q1, and a tangent of the first common section S1 on the second guiding roller 12 is a second tangent Q2, the material strip L bypasses the first guiding roller 11 and the second guiding roller 12 along the first common section S1, the material strip L located between the first tangent Q1 and the second tangent Q2 is transmitted along the first direction F1, the material strip L located downstream of the second tangent Q2 is transmitted along the second direction F2, and the position on the material strip L corresponding to the second tangent Q2 is the material strip turning position W.

[0078] Since the first guide roller 11 is located upstream of the die-cutting component 2, and the second guide roller 12 is located downstream of the die-cutting component 2, the first common section S1 between 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, and since the first direction F1 is located on the first common section S1, by allowing the material strip L to bypass the first guide roller 11 and the second guide roller 12 along the first common section S1, under the guidance of the first guide roller 11 and the second guide roller 12, the purpose of allowing the material strip L to be transported along the first direction F1 for a preset distance and then transported downstream along the second direction F2 different from the first direction F1 can be achieved. The implementation method is simple, which can simplify the structure of the material strip guiding component 1 and reduce the cost of the material strip guiding component 1.

[0079] In order to make the tab B peel off from the straight segment adsorption surface 31 more smoothly, in some embodiments, see Figure 1B The waste material suction component 3 is located on the side of the material belt L that is away from the second guide roller 12 .

[0080] By locating the waste suction component 3 on the side of the material belt L away from the second guide roller 12, the material belt L can be located between the second guide roller 12 and the waste suction component 3. With this arrangement, when the material belt L is converted from being transmitted along the first direction F1 to being transmitted along the second direction F2, the tab B can be more smoothly peeled off from the straight segment adsorption surface 31.

[0081] In order to prevent the material strip L from being damaged by friction due to friction between the material strip L and the straight segment adsorption surface 31 during the conveying process, in some embodiments, see Figure 1B , Figure 2 and Figure 3, the spacing between the second tangent line Q2 and the straight segment adsorption surface 31 is 1mm-2mm. By setting the spacing between the second tangent line Q2 and the straight segment adsorption surface 31 to 1mm-2mm, a certain spacing can be provided between the second guide roller 12 and the straight segment adsorption surface 31, so that friction between the material strip L and the straight segment adsorption surface 31 can be avoided during the conveying process.

[0082] Specifically, the distance between the second tangent line Q2 and the straight segment adsorption surface 31 may be 1 mm, 1.5 or 2 mm, etc., which is not limited in this embodiment.

[0083] In order to reduce the wrap angle of the material strip L on the second guide roller 12, and thus better prevent the tab B from folding or warping, in some embodiments, see Figure 5 The material strip guiding assembly 1 also includes: a third guide roller 13, the third guide roller 13 is located downstream of the second guide roller 12, the second common section 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 section S2, the third guide roller 13 and the second guide roller 12 are used to guide the material strip L to be transmitted along the second direction F2, and the angle a between the second common section S2 and the first common section S1 is an obtuse angle.

[0084] Since the second common section 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 section S2, when the material strip L bypasses the second guide roller 12 and the third guide roller 13 in the second common section S2 and is transmitted along the second direction F2, the third guide roller 13 can play a role in guiding the transmission direction of the material strip L to ensure that the material strip L can be transmitted along the second direction F2. Since the angle a between the second common section S2 and the first common section S1 is an obtuse angle, the wrap angle of the material strip L on the second guide roller 12 can be made smaller when bypassing the second guide roller 12, thereby better preventing the tab B from folding or warping.

[0085] In some embodiments, see Figure 5 , 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 .

[0086] Such an arrangement can make the diameters of the first guide roller 11 , the second guide roller 12 , and the third guide roller 13 more consistent, which is convenient for subsequent batch processing and can further reduce costs.

[0087] Of course, in other embodiments, the diameter of the first guide roller 11 , the diameter of the second guide roller 12 , and the diameter of the third guide roller 13 may also be different from each other, which is not limited in this embodiment.

[0088] In some embodiments, see Figure 5 , 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.

[0089] By making the first guide roller 11 and the second guide roller 12 parallel to each other, the material strip L can be more smoothly and stably conveyed around the first guide roller 11 and the second guide roller 12. Similarly, by making the second guide roller 12 and the third guide roller 13 parallel to each other, the material strip L can be more smoothly and stably conveyed around the second guide roller 12 and the third guide roller 13.

[0090] In some embodiments, see Figure 2 and Figure 5 The die-cutting assembly 2 includes: a laser generator 21, which is opposite to the material strip L conveyed along the first direction F1 and is used to emit a laser 211 to die-cut the waste material FL.

[0091] Since the laser generator 21 can cut the waste FL on the material strip L by means of laser 211 die-cutting, and the laser 211 does not need to directly contact the material strip L when die-cutting the waste FL 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.

[0092] Of course, in other embodiments, the die-cutting assembly 2 may also include a cutter. When the die-cutting assembly 2 includes a cutter, the waste material FL on the material strip L may be cut by the cutter, which is not limited in this embodiment.

[0093] In order to improve the die-cutting quality when the laser generator 21 die-cuts the waste material FL on the material belt L, in some embodiments, see Figure 5 , 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 perpendicular to the material strip L, so that the laser 211 can better cut the waste FL on the material strip L, so that the laser generator 21 has better die-cutting quality when die-cutting the waste FL on the material strip L.

[0094] Of course, in other embodiments, the direction of the laser 211 and the first direction F1 may have other angles. For example, the angle between the direction of the laser 211 and the first direction F1 may be 80°, 84° or 85°, etc. This embodiment is not limited to this.

[0095] In some embodiments, see Figure 3and Figure 5 The waste suction component 3 also includes: an inclined section suction surface 32, which is connected to the straight section suction surface 31 and is located downstream of the straight section suction surface 31. Along the first direction F1, the inclined section suction surface 32 is inclined in a direction gradually away from the first material belt segment L1, and the straight section suction surface 31 is used to transfer the waste FL to the inclined section suction surface 32.

[0096] Since the inclined section adsorption surface 32 is inclined in the direction gradually away from the first material belt segment L1 along the first direction F1, the distance between the waste material FL and the second guide roller 12 in the direction perpendicular to the inclined section adsorption surface 32 can gradually increase during the process of the waste material FL being transferred from the straight section adsorption surface 31 to the inclined section adsorption surface 32, thereby avoiding the waste material FL from interfering with the second guide roller 12 during the transfer process.

[0097] In addition, by transferring the waste material FL from the straight segment adsorption surface 31 to the inclined segment adsorption surface 32 , it is possible to avoid the waste material FL from being accumulated on the straight segment adsorption surface 31 .

[0098] In some embodiments, see Figure 3 The waste suction component 3 is a vacuum belt, which includes a straight segment belt 311 and an inclined segment belt 312 , the inclined segment suction surface 32 is the belt surface of the inclined segment belt 312 , and the straight segment suction surface 31 is the belt surface of the straight segment belt 311 .

[0099] When the waste suction component 3 is a vacuum belt, since the vacuum belt has the function of sucking the waste FL and also has the function of transferring the waste FL adsorbed thereon, the purpose of sucking the waste FL and transferring the waste FL from the straight segment adsorption surface 31 to the inclined segment adsorption surface 32 can be achieved. Since the structure of the vacuum belt is simple, the structure of the waste suction component 3 can be simplified.

[0100] Of course, in other embodiments, the waste suction component 3 may also be other possible structures, as long as it can achieve the purpose of adsorbing the waste FL thereon. This embodiment does not limit the waste suction component 3.

[0101] In some embodiments, see Figure 6 The die-cutting mechanism 100 also includes: a waste receiving component 4, which has a suction port 41, and the suction port 41 is opposite to the end of the inclined segment suction surface 32 that is away from the straight segment suction surface 31. The waste receiving component 4 is used to suck the waste FL on the inclined segment suction surface 32 into the waste receiving component 4 through the suction port 41.

[0102] Since the suction port 41 is opposite to the end of the inclined segment suction surface 32 which is away from the straight segment suction surface 31, after the waste FL is successively transferred to the end of the inclined segment suction surface 32 which is away from the straight segment suction surface 31 through the straight segment suction surface 31 and the inclined segment suction surface 32, the waste receiving component 4 can suction the waste FL on the inclined segment suction surface 32 into the waste receiving component 4 through the suction port 41, thereby playing the role of recycling the waste FL and preventing the waste FL from falling to the ground.

[0103] The waste receiving component 4 may include but is not limited to a negative pressure waste suction barrel, which is not limited in this embodiment.

[0104] It is worth noting that, in the process of the waste receiving component 4 sucking the waste FL on the inclined suction surface 32 into the waste receiving component 4 through the suction port 41, the material strip L will inevitably be subjected to the suction force from the suction port 41. When the material strip L is subjected to the suction force from the suction port 41, the tab B connected to the material strip L will also be subjected to the suction force from the suction port 41, which may cause the tab B to fold or warp. In order to avoid this situation, in some embodiments, see Figure 7 The die-cutting mechanism 100 further includes: a shielding member 5 , which is located downstream of the material strip turning position W and between the suction port 41 and the material strip L. The shielding member 5 is used to reduce the suction force of the suction port 41 on the material strip L.

[0105] Since the shielding member 5 is located downstream of the material strip turning position W and between the adsorption port 41 and the material strip L, the shielding member 5 can reduce the adsorption force of the adsorption port 41 on the material strip L, and further reduce the adsorption force of the adsorption port 41 on the pole ear B, thereby reducing or avoiding the occurrence of folding or warping of the pole ear B.

[0106] In some embodiments, see Figure 7 and Figure 8 The shielding member 5 includes a smoothing section 51, and the smoothing section 51 is located on the conveying track of the material strip L conveyed along the second direction F2.

[0107] Since the smoothing section 51 is located on the conveying track wire of the material strip L conveyed along the second direction F2, when the material strip L is conveyed along the conveying track, even if the pole ear B is folded or warped, the smoothing section 51 can also smooth the pole ear B connected to the material strip L, thereby better avoiding the occurrence of folding or warping of the pole ear B.

[0108] In some embodiments, see Figure 7 and Figure 8The shielding member 5 further includes: a first guide section 52, which is connected to the upstream of the smoothing section 51 and points from the downstream of the smoothing section 51 to the upstream direction, and the first guide section 52 is inclined in a direction gradually away from the second material strip section L2.

[0109] Since the first guide section 52 is connected to the upstream of the smoothing section 51 and points from the downstream of the smoothing section 51 to the upstream, the first guide section 52 is inclined in the direction gradually 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 made farther. With this arrangement, on the one hand, the first guide section 52 can gradually guide the second material strip section L2 to be transferred to the smoothing section 51, so that the process of the second material strip section L2 being transferred to the smoothing section 51 through the first guide section 52 is smoother. On the other hand, it can also avoid the situation where the first guide section 52 and the second material strip section L2 are scratched and damaged.

[0110] In some embodiments, see Figure 7 and Figure 8 The shielding member 5 further includes: a second guide section 53, which is connected to the downstream of the smoothing section 51 and points from the upstream of the smoothing section 51 to the downstream direction, and the second guide section 53 is inclined in a direction gradually away from the second material strip section L2.

[0111] By connecting the second guide section 53 to the downstream of the smoothing section 51 and pointing from the upstream of the smoothing section 51 to the downstream, the second guide section 53 is inclined in a direction gradually away from the second material strip section L2. This can make the distance between the end of the second guide section 53 away from the smoothing section 51 and the second material strip section L2 longer, thereby avoiding the second guide section 53 from scratching the second material strip section L2 and causing damage to the second material strip section L2.

[0112] In some embodiments, see Figure 7 The shielding member 5 is adjustably arranged in a direction close to or away from the material strip L.

[0113] By making the shielding member 5 adjustable in the direction of approaching or moving away from the material strip L, on one hand, by adjusting the shielding member 5 in the direction of approaching or moving away from the material strip L, the smoothing effect of the shielding member 5 on the tab B on the material strip L can be enhanced or weakened, so the smoothing strength of the shielding member 5 on the tab 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 the shielding member 5 can be better shielded between the material strip L and the adsorption port 41, so as to better avoid or reduce the occurrence of folding or warping of the tab B.

[0114] It should be noted that there are many ways to implement the above-mentioned shielding member 5 to be adjustably arranged in the direction close to or away from the material strip L. In one possible implementation, see Figure 7 and Figure 8 A first connecting member 54 may be provided on the shielding member 5, and a second connecting member 131 may be provided on the third guide roller 13. By making the first connecting member 54 adjustably arranged on the second connecting member 131 in a direction close to or away from the peripheral wall of the third guide roller 13, the purpose of adjustably setting the shielding member 5 in a direction close to or away from the material strip L can be achieved.

[0115] Of course, the purpose of enabling the shielding member 5 to be adjustably disposed in a direction close to or away from the material strip L may also be achieved by other means, which will not be listed one by one in this embodiment.

[0116] The first connecting member 54 and the second connecting member 131 may be connecting blocks or connecting plates, etc., which is not limited in this embodiment.

[0117] The present application also provides a battery cell winding device 200, see Fig. 9 The battery cell winding device 200 includes a die-cutting mechanism 100 .

[0118] Among them, the structure of the die-cutting mechanism 100 can be the same as the structure of the die-cutting mechanism 100 described in any of 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, and this embodiment will not be repeated here.

[0119] In this embodiment, since the die-cutting mechanism 100 can prevent the pole ear from folding or warping, when the battery cell winding device 200 includes the die-cutting mechanism 100, the quality of the battery cell produced by the battery cell winding device 200 can be better, and the pole ear will not fold or warp.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A die-cutting mechanism (100), characterized in that: include: A material belt guiding assembly (1), the material belt guiding assembly (1) being used for guiding a material belt (L) so that the material belt (L) can be conveyed along a first direction (F1) for a preset distance and then conveyed downstream 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) being a material belt turning position (W); A die-cutting assembly (2), the die-cutting assembly (2) being used for die-cutting waste material (FL) on the material strip (L) upstream of the material strip turning position (W) so as to form a tab (B) on the material strip (L); and A waste suction component (3), the waste suction component (3) comprising a straight segment suction surface (31), the straight segment suction surface (31) being parallel to and opposite to the material belt (L) conveyed along the first direction (F1) so as to suction the waste (FL) and the tab (B), and the orthographic projection of the material belt turning position (W) toward the straight segment suction surface (31) being at least partially located within the straight segment suction surface (31).

2. The die-cutting mechanism (100) according to claim 1, characterized in that: The material strip guiding assembly (1) comprises: a first guide roller (11), the first guide roller (11) being located upstream of the die-cutting assembly (2); and, a second guide roller (12), the second guide roller (12) being located downstream of the die-cutting assembly (2); a first common section plane (S1) between the first guide roller (11) and the second guide roller (12) being located between the first guide roller (11) and the second guide roller (12); the first direction (F1) being located on the first common section plane (S1); a tangent line of the first common section plane (S1) on the first guide roller (11) being a first tangent line (Q1); and a tangent line of the first common section plane (S1) on the second guide roller (12) being a second tangent line (Q2); the material strip (L) passing around the first guide roller (11) and the second guide roller (12) along the first common section plane (S1); the material strip (L) between the first tangent line (Q1) and the second tangent line (Q2) being transported along the first direction (F1); and the material strip (L) downstream of the second tangent line (Q2) being transported along the second direction (F2); and a position on the material strip (L) corresponding to the second tangent line (Q2) being the material strip turning position (W).

3. The die-cutting mechanism (100) according to claim 2, characterized in that: The waste suction component (3) is located on the side of the material belt (L) facing away from the second guide roller (12).

4. The die-cutting mechanism (100) according to claim 2, characterized in that: The distance between the second tangent line (Q2) and the straight line segment adsorption surface (31) is 1 mm-2 mm.

5. The die-cutting mechanism (100) according to claim 2, characterized in that: The material strip guiding assembly (1) further comprises: A third guide roller (13), wherein the third guide roller (13) is located downstream of the second guide roller (12), a second common section plane (S2) between 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 section plane (S2), the third guide roller (13) and the second guide roller (12) are used to guide the material strip (L) to be transmitted along the second direction (F2), and an angle (a) between the second common section plane (S2) and the first common section plane (S1) is an obtuse angle.

6. The die-cutting mechanism (100) according to claim 5, characterized in that: 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).

7. The die-cutting mechanism (100) according to any one of claims 1 to 6, characterized in that: The die-cutting assembly (2) comprises: A laser generator (21), the laser generator (21) is opposite to the material strip (L) conveyed along the first direction (F1), and is used for emitting laser (211) to die-cut the waste material (FL).

8. The die-cutting mechanism (100) according to any one of claims 1 to 6, characterized in that: The waste suction component (3) further comprises: An inclined section adsorption surface (32), the inclined section adsorption surface (32) is connected to the straight section adsorption surface (31) and is 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 gradually away from a first material belt segment (L1), the straight section adsorption surface (31) is used to transfer the waste material (FL) to the inclined section adsorption surface (32), and the first material belt segment (L1) is a material belt (L) transferred along the first direction (F1).

9. The die-cutting mechanism (100) according to claim 8, characterized in that: The die-cutting mechanism (100) further comprises: A waste receiving component (4), the waste receiving component (4) having a suction port (41), the suction port (41) being opposite to an end of the inclined segment suction surface (32) which is away from the straight segment suction surface (31), the waste receiving component (4) being used to suction the waste (FL) on the inclined segment suction surface (32) into the waste receiving component (4) through the suction port (41).

10. The die-cutting mechanism (100) according to claim 9, characterized in that: The die-cutting mechanism (100) further comprises: A shielding member (5), the shielding member (5) is located downstream of the material belt turning position (W) and between the suction port (41) and the material belt (L), and the shielding member (5) is used to reduce the suction force of the suction port (41) on the material belt (L).

11. The die-cutting mechanism (100) according to claim 10, characterized in that: The shielding member (5) comprises a smoothing section (51), and the smoothing section (51) is located on a conveying track of the material belt (L) conveyed along the second direction (F2).

12. The die-cutting mechanism (100) according to claim 11, characterized in that: The shielding member (5) further comprises: A first guide section (52), the first guide section (52) is connected to the upstream of the smoothing section (51) and points from the downstream of the smoothing section (51) to the upstream direction, the first guide section (52) is inclined in a direction gradually away from the second material strip section (L2), and the second material strip section (L2) is a material strip (L) transmitted along the second direction (F2).

13. The die-cutting mechanism (100) according to claim 12, characterized in that: The shielding member (5) further comprises: A second guide section (53), the second guide section (53) is connected to the downstream of the smoothing section (51) and points from the upstream of the smoothing section (51) to the downstream, and the second guide section (53) is inclined in a direction gradually away from the second material strip section (L2).

14. The die-cutting mechanism (100) according to any one of claims 10 to 13, characterized in that: The shielding member (5) is adjustably arranged in a direction approaching or moving away from the material strip (L).

15. A battery cell winding device, characterized in that: It comprises the die-cutting mechanism (100) described in any one of claims 1-14.

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