Lithium ion battery pole piece slitting device

Abstract

The utility model relates to the technical field of lithium battery processing, and discloses a lithium ion battery pole piece slitting device, which comprises a frame body and a slitting knife rotatably arranged on the frame body, a driving motor for driving the slitting knife to rotate is arranged on the frame body, the slitting knife comprises an upper knife and a lower knife, a frame body platform is horizontally arranged between the upper knife and the lower knife, and the upper knife and the lower knife are arranged on the frame body platform. A liquid storage tank is arranged above the frame body, a U-shaped plate is suspended above the upper cutter, the two sides of the U-shaped plate stretch across the two sides of the upper cutter, and the liquid storage tank is communicated with the inner wall of the U-shaped plate through a pipeline; a wool felt is arranged on the inner wall of the U-shaped plate and makes contact with the outer side of the upper cutter. According to the pole piece slitting device, abrasive particle abrasion between metal particles and dust and the slitting knife in the rotating process of the slitting knife can be avoided, the service life of the slitting knife is prolonged, the pole piece slitting quality is improved, the replacement frequency of the slitting knife is reduced, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery processing, in particular to a lithium ion battery pole piece cutting device. Background Art

[0002] At present, lithium-ion batteries have the advantages of high voltage window, high energy density, long cycle life, wide temperature range, excellent rate performance, etc., and are widely used in large and medium-sized electric equipment such as electric vehicles, electric bicycles, electric tools, and portable energy storage. Among them, pole piece production is the basic process for manufacturing lithium-ion power batteries, which determines the main performance of lithium batteries.

[0003] In order to manufacture the pole pieces of lithium batteries, the principle of disc slitting is adopted. The upper and lower discs installed on the knife shaft of the slitting machine are used to slit the rolled pole pieces with a thickness of 0.01-0.1mm into the size of battery specifications. However, in the process of pole piece slitting, a large amount of metal particles and dust will be generated due to the lateral extrusion and slitting process of the upper and lower slitting knives. The generated metal particles and dust will be abrasively worn by the slitting knives, resulting in scratches on the surface of the slitting knives, accelerating the aging and wear of the slitting knife blades and shortening the life of the slitting knives. When the slitting knife wears beyond a certain degree, the pole piece will show wire drawing, powder loss, burrs and other phenomena. The pole piece burrs may pierce the diaphragm, causing a short circuit inside the battery cell, which will have serious safety hazards. Utility Model Content

[0004] The purpose of the utility model is to provide a lithium-ion battery pole piece slitting device to solve the problem raised in the above-mentioned background technology that in the pole piece slitting process, a large amount of metal particles and dust will be generated due to the lateral extrusion and slitting process of the upper and lower slitting knives, and the generated metal particles and dust will cause abrasive wear with the slitting knives, thereby causing scratches on the surface of the slitting knives, accelerating the aging and wear of the slitting knife blades, and shortening the life of the slitting knives.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lithium-ion battery pole piece slitting device, comprising a frame and a slitting knife rotatably mounted on the frame, the frame is provided with a driving motor for driving the slitting knife to rotate, the slitting knife comprises an upper knife and a lower knife, a frame platform is horizontally provided between the upper knife and the lower knife, a liquid storage tank is provided above the frame, a U-shaped plate is suspended above the upper knife, two sides of the U-shaped plate span the two sides of the upper knife, and the liquid storage tank is connected to the inner wall of the U-shaped plate through a pipeline;

[0006] The inner wall of the U-shaped plate is provided with wool felt, and the wool felt is in contact with the outer side of the upper knife.

[0007] Furthermore, two drive shafts are arranged on the frame at intervals up and down, one end of the two drive shafts are meshed with each other through gears, one of the drive shafts is connected to the drive motor, and the upper knife and the lower knife are fixedly mounted on the two drive shafts respectively.

[0008] Furthermore, a processing through hole is provided on the processing platform, and the processing through hole is located at the contact position between the upper knife and the lower knife.

[0009] Furthermore, the processing platform is provided with two chip removal holes, both of which are arranged on the side of the slitting knife away from the feeding direction, and the two chip removal holes are spaced and distributed on both sides of the slitting knife.

[0010] Furthermore, an extension groove is provided at the upper end of each chip removal through hole.

[0011] Furthermore, a plurality of pairs of chip removal frames are arranged below the processing platform, the chip removal frames are located below the chip removal through holes, one side of the plurality of chip removal frames is provided with an exhaust duct connected to the inside of the chip removal frame, and an exhaust fan is arranged inside the exhaust duct.

[0012] Furthermore, a recessed portion is provided in the middle of each pair of chip removal frames, so as to form an installation space for installing the lower knife between each pair of chip removal frames.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model can prevent the metal particles and dust attached to the slitting knife during the cutting process from being retained on the wool felt, thereby preventing abrasive wear between the metal particles and dust and the slitting knife during the rotation of the slitting knife, thereby improving the service life of the slitting knife and the quality of electrode slitting, improving the service life of the slitting knife, reducing the replacement frequency of the slitting knife, improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a lithium-ion battery pole piece cutting device of the utility model;

[0016] Figure 2 The utility model is a lithium ion battery pole piece cutting device Figure 2 A local enlarged structural schematic diagram;

[0017] Figure 3 This is a schematic diagram of the structure of a lithium-ion battery pole piece cutting device according to the utility model from a bottom-up perspective;

[0018] Figure 4 The utility model is a schematic diagram of the specific structure of a chip removal frame of a lithium-ion battery pole piece cutting device.

[0019] In the figure: 1, frame; 2, slitting knife; 3, processing platform; 301, processing through hole; 302, chip removal through hole; 303, extension groove; 4, liquid storage tank; 41, U-shaped plate; 5, exhaust duct; 6, driving motor; 7, chip removal frame; 701, exhaust through hole; 702, inner recess. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] See also Figure 1-Figure 4 The utility model provides a technical solution: a lithium-ion battery pole piece slitting device, comprising a frame 1 and a slitting knife 2 rotatably mounted on the frame 1, the frame 1 is provided with a driving motor 6 for driving the slitting knife 2 to rotate, the slitting knife 2 comprises an upper knife and a lower knife, a frame platform 3 is horizontally arranged between the upper knife and the lower knife, a liquid storage tank 4 is arranged above the frame 1, a U-shaped plate 41 is suspended above the upper knife, the two sides of the U-shaped plate 41 span the two sides of the upper knife, the liquid storage tank 4 is connected to the inner wall of the U-shaped plate 41 through a pipeline; a control valve for controlling the flow of solution inside the pipeline and a driving pump for driving the flow of solution are arranged on the pipeline.

[0022] The inner wall of the U-shaped plate 41 is provided with wool felt, and the wool felt is in contact with the outer side of the upper knife.

[0023] In the utility model, during the actual battery electrode slitting process, a cutting lubricating solution is added to the liquid storage tank 4, and the cutting lubricating solution flows through the pipeline onto the wool felt to soak the wool felt. At this time, the slitting knife 2 rotates and cuts the raw materials for manufacturing lithium battery electrodes. During the cutting process, metal particles and dust attached to the slitting knife 2 will be retained on the wool felt, thereby avoiding abrasive wear between the metal particles and dust and the slitting knife 2 during the rotation of the slitting knife 2, thereby improving the service life of the slitting knife and the electrode slitting quality, improving the service life of the slitting knife 2, reducing the replacement frequency of the slitting knife 2, improving production efficiency and reducing production costs.

[0024] It should be noted that the cutting lubricating solvent can be a non-toxic and volatile solution such as alcohol or DMC solvent. The wool felt is moistened by continuously titrating the cutting lubricating solvent to cool the slitting knife, thereby preventing the slitting knife from being too hot and the blade from becoming blunt, which affects the slitting effect.

[0025] Furthermore, two drive shafts are arranged on the frame 1 at intervals in the upper and lower parts, and one end of the two drive shafts are meshed with each other through gears for transmission, one of the drive shafts is connected to the drive motor 6 for transmission, and the upper knife and the lower knife are fixedly mounted on the two drive shafts respectively.

[0026] Furthermore, a processing through hole 301 is provided on the processing platform 3, and the processing through hole 301 is located at the contact position between the upper knife and the lower knife.

[0027] Furthermore, two chip removal holes 302 are provided on the processing platform 3, and the two chip removal holes 302 are both arranged on the side of the slitting knife 2 away from the feeding direction, and the two chip removal holes 302 are spaced apart on both sides of the slitting knife 2; an extension groove 303 is provided at the upper end of each chip removal hole 302; a plurality of pairs of chip removal frames 7 are provided below the processing platform 3, and the chip removal frames 7 are located below the chip removal holes 302, and an exhaust duct 5 connected to the interior of the chip removal frame 7 is provided on one side of the plurality of chip removal frames 7, and an exhaust fan is provided inside the exhaust duct 5.

[0028] The upper ends of the chip removal holes 302 are each provided with an extension groove 303 , which can increase the influence range of the airflow flowing in the chip removal holes 302 and collect metal debris in a larger range into the chip removal frame 7 .

[0029] Furthermore, an inner recess 702 is provided in the middle of each pair of chip removal frames 7, which is used to form an installation space for installing the lower knife between each pair of chip removal frames 7; an exhaust hole 701 is provided on each chip removal frame 7, and a pipe extending from one side of the exhaust pipe 5 is connected to the exhaust hole 701.

[0030] Working principle: By setting up a chip removal frame 7 and setting up an exhaust duct 5 for extracting air from the chip removal frame 7 on one side of the chip removal frame 7, the interior of the chip removal frame 7 can be placed in a negative pressure. When the lithium battery electrode raw material passes through the front end of the slitting knife, the raw material can not only be adsorbed to make it smoother, but also, since an extension groove 303 is provided at the upper end of the chip removal through hole 302, the debris generated by the slitting can fall into the interior of the extension groove 303 and enter the interior of the chip removal frame 7 with the airflow, thereby avoiding abrasive wear between the metal particles generated by the cutting and the slitting knife.

[0031] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A lithium-ion battery electrode sheet cutting device, comprising a frame (1) and a cutting knife (2) rotatably mounted on the frame (1), wherein a driving motor (6) for driving the cutting knife (2) to rotate is arranged on the frame (1), characterized in that: The slitting knife (2) comprises an upper knife and a lower knife, a frame platform (3) is horizontally arranged between the upper knife and the lower knife, a liquid storage tank (4) is arranged above the frame (1), a U-shaped plate (41) is suspended above the upper knife, two sides of the U-shaped plate (41) span across two sides of the upper knife, and the liquid storage tank (4) is connected to the inner wall of the U-shaped plate (41) through a pipeline; The inner wall of the U-shaped plate (41) is provided with wool felt, and the wool felt is in contact with the outer side of the upper knife.

2. A lithium-ion battery pole piece cutting device according to claim 1, characterized in that: Two drive shafts are arranged at intervals on the frame (1) at upper and lower positions. One end of the two drive shafts are meshed with each other through gears for transmission. One of the drive shafts is connected to a drive motor (6) for transmission. The upper knife and the lower knife are fixedly mounted on the two drive shafts respectively.

3. A lithium-ion battery pole piece cutting device according to claim 1, characterized in that: The processing platform (3) is provided with a processing through hole (301), and the processing through hole (301) is located at the contact position between the upper knife and the lower knife.

4. A lithium-ion battery pole piece cutting device according to claim 3, characterized in that: The processing platform (3) is provided with two chip removal holes (302), both of which are arranged on the side of the slitting knife (2) away from the feeding direction, and the two chip removal holes (302) are spaced apart and distributed on both sides of the slitting knife (2).

5. A lithium-ion battery pole piece cutting device according to claim 4, characterized in that: An extension groove (303) is provided at the upper end of each chip removal through hole (302).

6. A lithium-ion battery pole piece cutting device according to claim 5, characterized in that: A plurality of pairs of chip removal frames (7) are arranged below the processing platform (3), the chip removal frames (7) are located below the chip removal through holes (302), one side of the plurality of chip removal frames (7) is provided with an exhaust duct (5) connected to the inside of the chip removal frame (7), and an exhaust fan is arranged inside the exhaust duct (5).

7. A lithium-ion battery pole piece cutting device according to claim 6, characterized in that: An inner recess (702) is provided in the middle of each pair of chip removal frames (7) for forming an installation space for installing a lower knife between each pair of chip removal frames (7).

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