Gummed paper cutting device for cylindrical roll core

Abstract

The gummed paper cutting device for the cylindrical roll core is used for cutting gummed paper wound on the outer side of the cylindrical roll core, the gummed paper cutting device comprises an annular piece, an adsorption mechanism and a cutting mechanism, the annular piece is oppositely arranged on the outer side of the gummed paper, and a plurality of knife edges are formed in the inner side of the annular piece; the adsorption mechanism is arranged on the annular piece and used for adsorbing and fixing gummed paper to the inner side of the annular piece. The cutting mechanism is oppositely arranged on the inner side of the gummed paper, the cutting mechanism is provided with a plurality of cutting parts opposite to the position of the reserved knife edge, and the cutting parts move towards the reserved knife edge to cut the gummed paper; according to the device, gummed paper is adsorbed and fixed to the inner side of the annular piece through the adsorption mechanism, a cutting part of the cutting mechanism linearly moves towards a reserved knife edge to cut the gummed paper, so that a circular adhesive tape forms a plurality of areas, the gummed paper in each area is pressed towards the end face of a tab, a regular polygon shape is formed on the end face of the tab, and the adhesiveness is better when the gummed paper is pressed after cutting; and the gummed paper does not tilt to influence subsequent processing, so that the safety performance of the battery is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a tape cutting device for cylindrical roll cores. Background Technology

[0002] A cylindrical battery is a type of battery composed of components such as a positive electrode, a negative electrode, a separator, an electrolyte, and a casing. It is cylindrical in shape. Its structure typically includes components such as a casing, a cap, a positive electrode, a negative electrode, a separator, an electrolyte, a PTC element, gaskets, and a safety valve. The edges of the cylindrical battery tabs are equipped with insulating tape to prevent the tabs from contacting the casing wall, which could cause poor casing voltage. This ensures that the battery can charge and discharge normally and provides protection in abnormal conditions.

[0003] Announcement No. CN106625855B relates to a battery adhesive tape cutting device. The battery adhesive tape cutting device includes: a base; a support base, fixedly mounted on the base, the support base including a body, two opposing clamping blocks, and a sliding block, a guide rail formed at the end of the body away from the base, a clamping gap formed between the two clamping blocks, the sliding block slidably mounted on the guide rail and movable relative to the two clamping blocks, and a retaining gap aligning with the clamping gap at one end of the sliding block; a blade, the two ends of which are respectively clamped and received in the clamping gap and the retaining gap, and a serrated cutting edge formed on the edge of the blade away from the support base; and an adjusting component, which adjustably presses the blade against the support base.

[0004] Currently, the industry standard is to wrap a layer of adhesive around the edge of the core, and then press the end face together to adhere the adhesive to the tab end face. However, after the adhesive is applied, the adhesive itself is less than its bending strength, causing the adhesive to lift up. After pressing, the wrinkles stick together, reducing the adhesion to the core end face, which ultimately affects the welding of the current collector and thus reduces the battery safety performance. Utility Model Content

[0005] In view of this, the present invention proposes an adhesive tape cutting device for cylindrical cores, which cuts the adhesive tape in multiple places, so that the adhesion after cutting is better and the adhesive tape will not lift up and affect subsequent processing, thereby improving the battery safety performance.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a tape cutting device for cylindrical cores, used to cut the tape wound on the outside of the cylindrical core. It includes an annular component, an adsorption mechanism, and a cutting mechanism. The annular component is disposed opposite to the outside of the tape, and a plurality of cutting slits are provided on the inner side of the annular component. The adsorption mechanism is disposed on the annular component and is used to adsorb and fix the tape on the inner side of the annular component. The cutting mechanism is disposed opposite to the inner side of the tape, and the cutting mechanism is provided with a plurality of cutting parts disposed opposite to the cutting slits. The cutting parts move toward the cutting slits to cut the tape.

[0007] Based on the above technical solutions, preferably, the inner diameter of the annular component matches the outer diameter of the adhesive tape, and the outer sidewall of the adhesive tape abuts against the inner sidewall of the annular component.

[0008] Based on the above technical solutions, preferably, the adsorption mechanism includes an annular channel, wherein the annular channel is opened on the inner side of the annular component, and the annular component is provided with an adsorption hole and a connecting hole that communicate with the annular channel. The adsorption hole is located on the inner side of the annular component, and the connecting hole is connected to the suction end of an external adsorption device. The adhesive paper is adsorbed onto the inner wall of the annular component through the adsorption hole, and the top surface of the adhesive paper is flush with the end face of the annular component.

[0009] Based on the above technical solutions, preferably, the number of adsorption holes is multiple, and the number of adsorption holes is equal to the number of knife-holding slits, and the adsorption holes are located at the center between two adjacent knife-holding slits.

[0010] Based on the above technical solutions, preferably, the cutting mechanism further includes an mounting component and several pushing components. The mounting component is disposed opposite to the inner side of the adhesive paper. Several pushing components are fixed on the outer side of the mounting component and are evenly distributed in a ring along the axis of the cylindrical core. The number of pushing components is equal to the number of cutting parts, and each cutting part is threadedly fixed to the telescopic end of the corresponding pushing component, driving the cutting part to move toward the blade edge to cut the adhesive paper.

[0011] Based on the above technical solution, preferably, a number of cutting portions are evenly distributed in a ring along the axis of the cylindrical core, the diameter of the adhesive paper is 21-30mm, and the number of cutting portions is 8. When the diameter of the adhesive paper increases by 10mm, the number of cutting portions increases by 2.

[0012] Based on the above technical solutions, preferably, the angle between the two cutting sections is 40-60°, and the distance between the cutting section and the end face of the core is 0.3-0.7mm.

[0013] Based on the above technical solutions, preferably, the outer contour shape of the cutting part matches the inner contour shape of the cutting edge.

[0014] Based on the above technical solutions, preferably, the depth of the cutting edge is 2-4mm and the width is 0.3-0.7mm.

[0015] Based on the above technical solutions, preferably, the pushing component is one of an electric push rod, a telescopic cylinder, or a hydraulic cylinder.

[0016] The adhesive tape cutting device for cylindrical roll cores of this invention has the following advantages over the prior art:

[0017] (1) The adhesive paper is adsorbed and fixed on the inner side of the ring by the adsorption mechanism. The cutting part of the cutting mechanism moves in a straight line toward the blade to cut the adhesive paper, so that the circular tape forms multiple areas. The adhesive paper of each area after cutting is pressed toward the end face of the electrode. The adhesive paper forms a regular polygon on the end face of the electrode, which makes the adhesion better after cutting and pressing. The adhesive paper will not lift up and affect subsequent processing, thus improving the battery safety performance.

[0018] (2) Multiple adsorption holes are evenly distributed on the inner side of the ring-shaped part, which, together with the cutting edge, can fix the adhesive paper in all directions, greatly improving the stability of cutting.

[0019] (3) By setting the adsorption hole at the center between two adjacent blades, each cutting area can be stably adsorbed and fixed, preventing the adhesive from sticking to the blade after cutting and causing the adhesive paper to stick and collapse when the blade is closed. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural view of the present invention;

[0022] Figure 2 This is a top view of the structure of this utility model;

[0023] Figure 3 This is a cross-sectional view of the annular channel inside the annular component of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the adhesive tape after cutting according to this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the adhesive tape after pressing. Detailed Implementation

[0026] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0027] like Figure 1-5As shown, this utility model discloses a tape cutting device for a cylindrical core, used to cut the tape 5 wound around the outside of a cylindrical core 4. It includes an annular component 1, an adsorption mechanism 2, and a cutting mechanism 3. The annular component 1 is positioned opposite to the outside of the tape 5, and its inner side has several cutting slits 100. The adsorption mechanism 2 is mounted on the annular component 1 and is used to adsorb and fix the tape 5 to the inner side of the annular component 1. The cutting mechanism 3 is positioned opposite to the inner side of the tape 5, and its cutting mechanism 3 has several cutting sections 31 positioned opposite to the cutting slits 100. The cutting sections 31 move toward the cutting slits 100 to cut the tape 5.

[0028] It should be noted that a circular adhesive tape 5 is wound around the edge of the tab of the cylindrical core 4. At this time, the adhesive tape 5 is in a state to be cut. The adhesive tape 5 is moved into the annular part, and the adsorption mechanism 2 uses negative pressure to adsorb and fix the adhesive tape 5 to the inside of the annular part 1, ensuring that the adhesive tape 5 is stable in position during the subsequent cutting process and will not be displaced or shaken due to the cutting force. Then, the cutting mechanism 3 is moved to the inside of the adhesive tape 5, and the cutting part 31 of the cutting mechanism 3 moves linearly toward the blade 100. The blade on the cutting part 31 contacts the adhesive tape 5 and applies pressure. Due to the presence of the blade 100, the blade can smoothly cut into the adhesive tape 5, and the adhesive tape 5 is cut according to the predetermined shape and size. Then, the adhesive tape 5 in each area after cutting is pressed toward the tab end face. The adhesive tape 5 forms a regular polygon on the tab end face, which makes the adhesion better after cutting and pressing. The adhesive tape 5 will not lift up and affect subsequent processing, thus improving the battery safety performance.

[0029] In this embodiment, the inner diameter of the annular part 1 matches the outer diameter of the adhesive tape 5, and the outer sidewall of the adhesive tape 5 abuts against the inner sidewall of the annular part 1.

[0030] It should be noted that when the adsorption mechanism 2 generates negative pressure to adsorb the adhesive paper 5, the abutting state makes the adhesive paper 5 and the inner wall of the ring part 1 form a tighter contact, which is conducive to the uniform distribution and effective transmission of negative pressure, thereby enhancing the adsorption effect and further improving the stability of the adhesive paper 5 during the cutting process.

[0031] The adsorption mechanism 2 in this embodiment includes an annular channel 210, wherein the annular channel 210 is opened on the inner side of the annular member 1, and the annular member 1 is provided with an adsorption hole 220 and a connecting hole 230 communicating with the annular channel 210. The adsorption hole 220 is located on the inner side of the annular member 1, and the connecting hole 230 is connected to the suction end of the external adsorption device. The adhesive paper 5 is adsorbed onto the inner wall of the annular member 1 through the adsorption hole 220, and the top surface of the adhesive paper 5 is flush with the end face of the annular member 1.

[0032] It should be noted that the annular channel 210 opened on the inner side of the annular component 1 provides a continuous channel for airflow that surrounds the adhesive paper 5. When the external adsorption device is started, a suction effect is generated in the annular channel 210 through the connection hole 230, so that a negative pressure environment is formed in the annular channel 210. Since the adsorption holes 220 are evenly distributed on the inner side of the annular component 1, the adhesive paper 5 can be adsorbed uniformly in all directions. Under the action of adsorption force, the adhesive paper 5 is adsorbed on the inner wall of the annular component 1, ensuring the stability of the position of the adhesive paper 5.

[0033] In this embodiment, there are multiple adsorption holes 220, and the number of adsorption holes 220 is equal to the number of knife-holding slits 100. The adsorption holes 220 are located at the center between two adjacent knife-holding slits 100.

[0034] It should be noted that multiple adsorption holes 220 are evenly distributed on the inner side of the annular part 1, which cooperate with the cutting edge 100 to fix the adhesive paper 5 in all directions. Furthermore, the adsorption holes 220 are located at the center between two adjacent cutting edges 100, so that each cutting area can be stably adsorbed and fixed, preventing the adhesive paper 5 from sticking to the blade after cutting and causing it to stick and collapse when the blade is closed.

[0035] The cutting mechanism 3 in this embodiment also includes a mounting component 32 and several pushing components 33. The mounting component 32 is disposed opposite to the inner side of the adhesive tape 5. Several pushing components 33 are fixed on the outer side of the mounting component 32 and are evenly distributed in a ring along the axis of the cylindrical core 4. The number of pushing components 33 is equal to that of the cutting parts 31, and each cutting part 31 is threadedly fixed to the telescopic end of the corresponding pushing component 33, driving the cutting part 31 to move toward the blade 100 to cut the adhesive tape 5.

[0036] It should be noted that the pusher 33 pushes the cutting part 31 toward the blade 100 to cut the adhesive paper 5. The cutting part 31 is threadedly connected to the telescopic end of the pusher 33, which allows for quick and easy replacement after the service life expires.

[0037] It is understood that the pusher 33 is one of an electric push rod, a telescopic cylinder, or a hydraulic cylinder; in this embodiment, a telescopic cylinder is preferred, and the telescopic cylinder is controlled by a single solenoid valve to ensure that the cutting speed is consistent when multiple cylinders are cutting.

[0038] In this embodiment, several cutting portions 31 are evenly distributed in a ring along the axis of the cylindrical core 4. The diameter of the adhesive paper 5 is 21-30mm, and the number of cutting portions 31 is 8. When the diameter of the adhesive paper 5 increases by 10mm, the number of cutting portions 31 increases by 2.

[0039] It should be noted that several cutting sections 31 are evenly distributed in a ring along the axis of the cylindrical core 4, so that the cutting force on the adhesive paper 5 can be evenly distributed when cutting the adhesive paper 5. When the pusher 33 drives the cutting section 31 to move toward the cutting edge 100 to cut the adhesive paper 5, each cutting section 31 applies force to the adhesive paper 5 from different directions at the same time, avoiding the problem of tearing and deformation of the adhesive paper 5 due to excessive local force, and ensuring the stability and cutting quality of the cutting process. When the diameter of the adhesive paper 5 is 21-30mm, the number of cutting sections 31 is set to 8. When the diameter of the adhesive paper 5 increases by 10mm, the number of cutting sections 31 increases by 2, and the number of cutting sections 31 is changed according to the change of the diameter of the adhesive paper 5. Since the perimeter and area of ​​the adhesive paper 5 will increase as the diameter of the adhesive paper 5 increases, more cutting sections 31 are needed to ensure the cutting accuracy and stability.

[0040] In this embodiment, the angle between the two cutting portions 31 is 40-60°, and the distance between the cutting portion 31 and the end face of the core is 0.3-0.7mm.

[0041] It should be noted that the angle between the two cutting sections 31 is 45°, and the distance between the cutting section 31 and the end face of the core is 0.5mm. This prevents the cutting section 31 from interfering with the cylindrical core 4 during the cutting process, provides sufficient safety space for the movement of the cutting section 31, and ensures the smooth progress of the cutting process.

[0042] In this embodiment, the outer contour shape of the cutting part 31 matches the inner contour shape of the cutting edge 100.

[0043] It should be noted that when the cutting part 31 moves toward the cutting edge 100 under the drive of the pusher 33, the inner contour of the cutting edge 100 guides the cutting part 31 to cut along a predetermined path, ensuring the accuracy of the cutting. The matching shape allows the cutting part 31 to make uniform contact with the adhesive tape 5 during the cutting process. The outer contour of the cutting part 31 fits tightly with the inner contour of the cutting edge 100, which can distribute the cutting force evenly on the cutting edge of the adhesive tape 5. This avoids the problem of the adhesive tape 5 tearing, deforming or incomplete cutting due to excessive or insufficient local force, and achieves a uniform and stable cutting process.

[0044] In this embodiment, the depth of the cutting edge is 2-4mm and the width is 0.3-0.7mm; specifically, in this embodiment, the depth of the cutting edge 100 is 1mm and the width is 0.3mm.

[0045] Working principle:

[0046] When the adhesive tape 52 is brought into contact with the annular part 1, and the external adsorption device is activated, a suction effect is generated in the annular channel 110 through the connection hole 110, so that a negative pressure environment is formed in the annular channel 110; this allows for all-round and uniform adsorption of the adhesive tape 5; then, each pushing part 33 pushes the corresponding cutting part 31 to move toward the blade 100 to cut the adhesive tape 5, and then the cut adhesive tape 5 in each area is pressed toward the tab end face, so that the adhesive tape 5 forms a regular polygon shape on the tab end face, which makes the adhesion better after cutting and pressing, and the adhesive tape 5 will not lift up and affect subsequent processing, thus improving the battery safety performance.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tape cutting device for cylindrical cores, used for cutting the tape wound around the outside of a cylindrical core, characterized in that, It includes a ring-shaped component (1), an adsorption mechanism (2), and a cutting mechanism (3), wherein, The annular part (1) is disposed opposite to the outer side of the adhesive paper, and the inner side of the annular part (1) is provided with a plurality of cutting edges (100); The adsorption mechanism (2) is set on the annular part (1) and is used to adsorb and fix the adhesive paper to the inner side of the annular part (1); The cutting mechanism (3) is arranged on the inner side of the adhesive paper. The cutting mechanism (3) is provided with a plurality of cutting parts (31) arranged opposite to the position of the blade (100). The cutting parts (31) move toward the blade (100) to cut the adhesive paper.

2. The adhesive tape cutting device for cylindrical cores as described in claim 1, characterized in that: The inner diameter of the annular part (1) matches the outer diameter of the adhesive tape, and the outer sidewall of the adhesive tape abuts against the inner sidewall of the annular part (1).

3. The adhesive tape cutting device for cylindrical cores as described in claim 1, characterized in that: The adsorption mechanism (2) includes an annular channel (210), wherein the annular channel (210) is opened on the inner side of the annular part (1), and the annular part (1) is provided with an adsorption hole (220) and a connecting hole (230) communicating with the annular channel (210). The adsorption hole (220) is located on the inner side of the annular part (1), and the connecting hole (230) is connected to the suction end of the external adsorption device. The adhesive paper is adsorbed onto the inner wall of the annular part (1) through the adsorption hole (220), and the top surface of the adhesive paper is flush with the end face of the annular part (1).

4. The adhesive tape cutting device for cylindrical cores as described in claim 3, characterized in that: The number of adsorption holes (220) is multiple, and the number of adsorption holes (220) is equal to the number of knife-holding slits (100), and the adsorption holes (220) are located at the center between two adjacent knife-holding slits (100).

5. The adhesive tape cutting device for cylindrical cores as described in claim 1, characterized in that: The cutting mechanism (3) further includes a mounting part (32) and several pushing parts (33). The mounting part (32) is arranged opposite to the inner side of the adhesive paper. Several pushing parts (33) are fixed on the outer side of the mounting part (32) and are evenly distributed in a ring along the axis of the cylindrical core. The number of pushing parts (33) is equal to that of the cutting part (31), and each cutting part (31) is threadedly fixed on the telescopic end of the corresponding pushing part (33), driving the cutting part (31) to move toward the blade (100) to cut the adhesive paper.

6. The adhesive tape cutting device for cylindrical cores as described in claim 1, characterized in that: Several cutting sections (31) are evenly distributed in a ring along the axis of the cylindrical core. The diameter of the adhesive paper is 21-30mm. The number of cutting sections (31) is 8. When the diameter of the adhesive paper increases by 10mm, the number of cutting sections (31) increases by 2.

7. The adhesive tape cutting device for cylindrical cores as described in claim 1, characterized in that: The angle between the two cutting sections (31) is 40-60°, and the distance between the cutting section (31) and the end face of the core is 0.3-0.7mm.

8. The adhesive tape cutting device for cylindrical cores as described in claim 1, characterized in that: The outer contour shape of the cutting part (31) matches the inner contour shape of the cutting edge (100).

9. The adhesive tape cutting device for cylindrical cores as described in claim 8, characterized in that: The depth of the cutting edge (100) is 2-4 mm and the width is 0.3-0.7 mm.

10. The adhesive tape cutting device for cylindrical cores as described in claim 5, characterized in that: The pusher (33) is one of an electric push rod, a telescopic cylinder, or a hydraulic cylinder.

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