Lithium ion battery diaphragm splitting machine device and working method thereof

Abstract

The invention discloses a lithium ion battery diaphragm splitting machine device and a working method thereof. The lithium ion battery diaphragm splitting machine device comprises a rack, and an unwinding mechanism, a traction mechanism, a cutting mechanism and a winding mechanism are sequentially arranged on the rack; the unwinding mechanism comprises an unwinding turnover mechanism, a first unwinding roller and a second unwinding roller are arranged at the two ends of the unwinding turnover mechanism respectively, the winding mechanism comprises two sets of winding turnover mechanisms, and a first winding roller and a second winding roller are arranged at the two ends of each winding turnover mechanism respectively. The control mechanism is used for controlling operation of the unwinding mechanism, the traction mechanism, the cutting mechanism and the winding mechanism; by arranging a double-unwinding and double-winding structure, the slitting efficiency of the lithium ion battery diaphragm is improved, the downtime of equipment is shortened, and the production cost is reduced; and meanwhile, tension control, a deviation rectifying device and an accurate cutting mechanism are adopted, so that the quality and the dimensional accuracy of the slit diaphragm are ensured, and the consistency and the reliability of products are improved.

Description

Technical Field

[0001] The invention relates to the technical field of slitting devices, and in particular to a lithium-ion battery diaphragm slitting machine device and a working method thereof. Background Art

[0002] As one of the key components of lithium-ion batteries, the performance and quality of lithium-ion battery separators directly affect the safety, cycle life and performance of the battery. In the production process of lithium-ion battery separators, slitting is an important link, the purpose of which is to cut the wide separator raw materials according to certain specifications and sizes to meet the needs of different types of batteries.

[0003] Traditional lithium-ion battery diaphragm slitting machines usually adopt a single-release and single-rewinding method, that is, only one roll of diaphragm raw material can be released at a time, and only one roll of cut diaphragm can be rewound at the same time. After cutting, the diaphragm needs to be replaced, which is time-consuming and labor-intensive, and has problems such as low production efficiency, complicated operation, and easy generation of waste. Summary of the invention

[0004] The purpose of the present invention is to provide a lithium ion battery diaphragm slitting machine device and a working method thereof to solve the following technical problems:

[0005] How to improve the production efficiency of lithium-ion battery separator slitting machine?

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] In a first aspect, the present invention discloses a lithium-ion battery separator slitting machine device, comprising a frame, on which an unwinding mechanism, a traction mechanism, a cutting mechanism and a winding mechanism are sequentially arranged.

[0008] Among them, the unwinding mechanism includes an unwinding and turning mechanism, and the first unwinding roller and the second unwinding roller are respectively provided at both ends of the unwinding and turning mechanism, which are respectively used to place two rolls of lithium-ion battery diaphragm raw materials to be cut; the winding mechanism includes two groups of winding and turning mechanisms, and the first winding roller and the second winding roller are respectively provided at both ends of each winding and turning mechanism, and the first winding rollers in the two winding and turning mechanisms are used to wind up the lithium-ion battery diaphragm released by the first unwinding roller, and the second winding rollers in the two winding and turning mechanisms are used to wind up the lithium-ion battery diaphragm released by the second unwinding roller.

[0009] The lithium-ion battery diaphragm slitting machine device also includes a control system for controlling the operation of an unwinding mechanism, a traction mechanism, a cutting mechanism and a winding mechanism.

[0010] In a further embodiment of the present invention: the unwinding mechanism also includes a film sticking device, a cutter, a deviation correction mechanism and an unwinding tension adjustment mechanism which are sequentially arranged between the unwinding flipping mechanism and the traction mechanism, wherein the film sticking device is used to connect the replaced lithium-ion battery diaphragm raw material with the previous section of raw material, the cutter is used to cut the wound lithium-ion battery diaphragm, the deviation correction mechanism is used to ensure the position accuracy of the lithium-ion battery diaphragm during the unwinding process, and the tension adjustment mechanism is used to control the unwinding tension of the diaphragm raw material.

[0011] In a further embodiment of the present invention: a winding tension adjustment mechanism and a counting mechanism are provided on the sides of the two sets of winding and flipping mechanisms; wherein the winding tension adjustment mechanism is used to adjust the winding tension of the lithium-ion battery diaphragm, and the counting mechanism is used to record the length of the wound diaphragm.

[0012] In a further embodiment of the present invention, the traction mechanism includes a plurality of traction rollers, a speed regulating mechanism and a traction motor, and the traction motor drives the traction rollers to rotate at a constant speed through the speed regulating mechanism.

[0013] In a further embodiment of the present invention, the cutting mechanism comprises a cutter assembly and a cutter holder, wherein the cutter assembly is mounted on the cutter holder.

[0014] In a further embodiment of the present invention, the knife holder is movably mounted on the frame to adjust the slitting width.

[0015] In a second aspect, the present invention further discloses a working method of the lithium-ion battery separator slitting device as described above, comprising the following steps:

[0016] S1: installing two rolls of lithium-ion battery separator raw materials to be cut on the first unwinding roller and the second unwinding roller respectively, and connecting the lithium-ion battery separator raw materials on the second unwinding roller to the traction mechanism, the cutting mechanism and the second winding roller in sequence;

[0017] S2: Start the second unwinding roller, the deviation correction mechanism, the unwinding tension adjustment mechanism, the traction mechanism, the cutting mechanism, the second winding roller, the winding tension adjustment mechanism, and the counting mechanism through the control system, so that the lithium-ion battery diaphragm raw material of the second unwinding roller is released at a uniform speed under the action of the deviation correction mechanism and the unwinding tension adjustment mechanism, and then passes through the cutting mechanism at a uniform speed through the traction mechanism. The cutting mechanism cuts the lithium-ion battery diaphragm raw material, thereby dividing the lithium-ion battery diaphragm raw material into two parts. The two parts of the lithium-ion battery diaphragm raw material are respectively wound through the two second winding rollers. The winding tension is adjusted by the winding tension adjustment mechanism during the winding process, and the winding length is calculated by the counting mechanism.

[0018] S3: When the lithium-ion battery diaphragm raw material on the second unwinding roller is wound up, the control system controls the unwinding flipping mechanism to automatically flip, thereby exchanging the positions of the first unwinding roller and the second unwinding roller, and at the same time, the lithium-ion battery diaphragm raw material on the second unwinding roller is cut off by a cutter, and the lithium-ion battery diaphragm raw material on the first unwinding roller is pasted by a film sticking device; at the same time, the control system also controls the two sets of winding flipping mechanisms to automatically flip, thereby exchanging the positions of the first winding roller and the second winding roller, and replacing the coiled material that has been wound up;

[0019] S4: Continue to unwind, pull, slit and rewind the lithium-ion battery separator raw material on the first unwinding roller through the control system. After the rewinding is completed, repeat the operation of step S3 and switch to the second unwinding roller and the second rewinding roller to continue working.

[0020] Beneficial effects of the present invention:

[0021] The present invention improves the slitting efficiency of lithium-ion battery diaphragms, reduces equipment downtime, and reduces production costs by arranging a double-unwinding and double-winding structure; at the same time, a tension control, a deviation correction device, and a precise cutting mechanism are adopted to ensure the quality and dimensional accuracy of the diaphragms after slitting, and improve the consistency and reliability of the products; the unwinding mechanism and the winding mechanism are both of the flip type, which can quickly replace the lithium-ion battery diaphragms that have been wound and unwound, saving time for replacing raw materials, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a structural schematic diagram of the lithium-ion battery separator slitting machine device in Example 1 of the present invention.

[0024] In the figure: 1. frame; 2. unwinding mechanism; 201. unwinding turning mechanism; 202. first unwinding roller; 203. second unwinding roller; 204. film device; 205. cutter; 206. deviation correction mechanism; 207. unwinding tension adjustment mechanism; 3. traction mechanism; 301. traction roller; 302. speed regulation mechanism; 303. traction motor; 4. cutting mechanism; 401. cutter assembly; 402. knife holder; 5. winding mechanism; 501. winding turning mechanism; 502. first winding roller; 503. second winding roller; 504. winding tension adjustment mechanism; 505. counting mechanism; 6. control system. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 The present invention is a lithium-ion battery separator slitting machine device, characterized in that it comprises a frame 1, on which a reeling mechanism 2, a traction mechanism 3, a cutting mechanism 4 and a reeling mechanism 5 are sequentially arranged;

[0027] The unwinding mechanism 2 includes an unwinding flipping mechanism 201, a film sticking device 204, a cutter 205, a correction mechanism 206 and an unwinding tension adjustment mechanism 207, wherein the unwinding flipping mechanism 201 is flipped by a motor drive, and a first unwinding roller 202 and a second unwinding roller 203 are respectively provided at both ends, which are respectively used to place two rolls of lithium-ion battery diaphragm raw materials to be cut; the film sticking device 204 is used to connect the replaced lithium-ion battery diaphragm raw material with the previous section of raw material, the cutter 205 is used to cut the lithium-ion battery diaphragm that has been rolled up, the correction mechanism 206 is used to ensure the position accuracy of the lithium-ion battery diaphragm during the unwinding process, and the tension adjustment mechanism 207 is used to control the unwinding tension of the diaphragm raw material.

[0028] The traction mechanism 3 includes a plurality of traction rollers 301 , a speed regulating mechanism 302 and a traction motor 303 . The traction motor 303 drives the traction rollers 301 to rotate at a constant speed through the speed regulating mechanism 302 .

[0029] The cutting mechanism 4 includes a cutter assembly 401 and a cutter holder 402. The cutter assembly 401 is mounted on the cutter holder 402. The cutter holder 402 is movably mounted on the frame 1 to adjust the cutting width.

[0030] The winding mechanism 5 includes two groups of winding and flipping mechanisms 501, each winding and flipping mechanism 501 is flipped by a motor drive, and a first winding roller 502 and a second winding roller 503 are respectively provided at both ends thereof, and also includes a winding tension adjustment mechanism 504 and a counting mechanism 505; the first winding roller 502 in the two winding and flipping mechanisms 501 is used to wind up the lithium-ion battery diaphragm released by the first unwinding roller 202, and the second winding roller 503 in the two winding and flipping mechanisms 501 is used to wind up the lithium-ion battery diaphragm released by the second unwinding roller 203; the winding tension adjustment mechanism 504 is used to adjust the winding tension of the lithium-ion battery diaphragm, and the counting mechanism 505 is used to record the length of the wound diaphragm.

[0031] The lithium-ion battery separator slitting machine device further comprises a control system 6 for controlling the operation of the unwinding mechanism 2 , the traction mechanism 3 , the cutting mechanism 4 and the winding mechanism 5 .

[0032] Example 2

[0033] This embodiment discloses a working method of a lithium-ion battery separator slitting machine device based on embodiment 1, comprising the following steps:

[0034] S1: installing two rolls of lithium-ion battery separator raw materials to be cut on the first unwinding roller 202 and the second unwinding roller 203 respectively, and connecting the lithium-ion battery separator raw materials on the second unwinding roller 203 to the traction mechanism 3, the cutting mechanism 4 and the second winding roller 503 in sequence;

[0035] S2: Start the second unwinding roller 203, the deviation correction mechanism 206, the unwinding tension adjustment mechanism 207, the traction mechanism 3, the cutting mechanism 4, the second winding roller 503, the winding tension adjustment mechanism 504, and the counting mechanism 505 through the control system 6, so that the lithium-ion battery diaphragm raw material of the second unwinding roller 203 is released at a uniform speed under the action of the deviation correction mechanism 206 and the unwinding tension adjustment mechanism 207, and then passes through the traction mechanism 3 at a uniform speed through the cutting mechanism 4, and the cutting mechanism 4 cuts the lithium-ion battery diaphragm raw material, thereby dividing the lithium-ion battery diaphragm raw material into two parts, and the two parts of the lithium-ion battery diaphragm raw material are respectively wound through the two second winding rollers 503, and the winding tension is adjusted by the winding tension adjustment mechanism 504 during the winding process, and the winding length is calculated by the counting mechanism 505;

[0036] S3: When the lithium-ion battery diaphragm raw material on the second unwinding roller 203 is wound up, the control system 6 controls the unwinding flipping mechanism 201 to automatically flip, thereby exchanging the positions of the first unwinding roller 202 and the second unwinding roller 203, and at the same time, the lithium-ion battery diaphragm raw material on the second unwinding roller 203 is cut off by the cutter 205, and the lithium-ion battery diaphragm raw material on the first unwinding roller 202 is pasted by the adhesive film device 204; at the same time, the control system 6 also controls the two sets of winding flipping mechanisms 501 to automatically flip, thereby exchanging the positions of the first winding roller 502 and the second winding roller 503, and replacing the coiled material that has been wound up;

[0037] S4: Continue to unwind, pull, slit and rewind the lithium-ion battery separator raw material on the first unwinding roller 202 through the control system 6. After the rewinding is completed, repeat the operation of step S3 and switch to the second unwinding roller 203 and the second rewinding roller 503 to continue working.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A lithium-ion battery separator slitting machine device, characterized in that: The machine frame (1) comprises a reeling mechanism (2), a traction mechanism (3), a cutting mechanism (4) and a reeling mechanism (5) which are sequentially arranged on the machine frame (1); The unwinding mechanism (2) comprises an unwinding and flipping mechanism (201), and the two ends of the unwinding and flipping mechanism (201) are respectively provided with a first unwinding roller (202) and a second unwinding roller (203); the winding mechanism (5) comprises two sets of winding and flipping mechanisms (501), and the two ends of each winding and flipping mechanism (501) are respectively provided with a first winding roller (502) and a second winding roller (503); It also includes a control system (6) for controlling the operation of the unwinding mechanism (2), the traction mechanism (3), the cutting mechanism (4) and the winding mechanism (5).

2. The lithium-ion battery separator slitting machine device according to claim 1, characterized in that: The unwinding mechanism (2) further comprises a film-forming device (204), a cutter (205), a deviation-correcting mechanism (206) and an unwinding tension adjusting mechanism (207) which are sequentially arranged between the unwinding turning mechanism (201) and the traction mechanism (3).

3. The lithium-ion battery separator slitting machine device according to claim 1, characterized in that: A winding tension adjustment mechanism (504) and a counting mechanism (505) are provided on the sides of the two sets of winding and turning mechanisms (501).

4. The lithium-ion battery separator slitting machine device according to claim 1, characterized in that: The traction mechanism (3) comprises a plurality of traction rollers (301), a speed regulating mechanism (302) and a traction motor (303); the traction motor (303) drives the traction rollers (301) to rotate at a constant speed through the speed regulating mechanism (302).

5. The lithium-ion battery separator slitting machine device according to claim 1, characterized in that: The cutting mechanism (4) comprises a cutter assembly (401) and a cutter frame (402), wherein the cutter assembly (401) is mounted on the cutter frame (402).

6. The lithium-ion battery separator slitting machine device according to claim 5, characterized in that: The knife holder (402) is movably mounted on the frame (1) to adjust the slitting width.

7. A working method of the lithium-ion battery separator slitting device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: installing two rolls of lithium-ion battery diaphragm raw materials to be cut on a first unwinding roller (202) and a second unwinding roller (203) respectively, and connecting the lithium-ion battery diaphragm raw materials on the second unwinding roller (203) to a traction mechanism (3), a cutting mechanism (4) and a second winding roller (503) in sequence; S2: The control system (6) starts the second unwinding roller (203), the deviation correction mechanism (206), the unwinding tension adjustment mechanism (207), the traction mechanism (3), the cutting mechanism (4), the second winding roller (503), the winding tension adjustment mechanism (504), and the counting mechanism (505), so that the lithium ion battery diaphragm raw material of the second unwinding roller (203) is released at a uniform speed under the action of the deviation correction mechanism (206) and the unwinding tension adjustment mechanism (207), and then passes through the traction mechanism (3) and the cutting mechanism (4) at a uniform speed. The cutting mechanism (4) cuts the lithium ion battery diaphragm raw material, thereby dividing the lithium ion battery diaphragm raw material into two parts. The two parts of the lithium ion battery diaphragm raw material are respectively wound by the two second winding rollers (503). During the winding process, the winding tension is adjusted by the winding tension adjustment mechanism (504), and the winding length is calculated by the counting mechanism (505); S3: When the lithium-ion battery diaphragm raw material on the second unwinding roller (203) is wound up, the control system (6) controls the unwinding flipping mechanism (201) to automatically flip, thereby exchanging the positions of the first unwinding roller (202) and the second unwinding roller (203), and at the same time, the lithium-ion battery diaphragm raw material on the second unwinding roller (203) is cut off by the cutter (205), and the lithium-ion battery diaphragm raw material on the first unwinding roller (202) is pasted by the adhesive film device (204); at the same time, the control system (6) also controls the two sets of winding flipping mechanisms (501) to automatically flip, thereby exchanging the positions of the first winding roller (502) and the second winding roller (503), and replacing the coiled material that has been wound up; S4: Continue to unwind, pull, slit and rewind the lithium-ion battery separator raw material on the first unwinding roller (202) through the control system (6). After the rewinding is completed, repeat the operation of step S (3) and switch to the second unwinding roller (203) and the second rewinding roller (503) to continue working.

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