Dust prevention and removal device for lithium ion battery pole piece

Abstract

The utility model belongs to the technical field of lithium ion battery production, and discloses a dust prevention and removal device for a lithium ion battery pole piece. Comprising an outer cover (1), a winding drum (2) and a connecting belt (3), a feeding and discharging port (4) is formed in one side of the outer cover (1), the winding drum (2) is installed in the outer cover (1), and a dust remover (5) is arranged at the position of the feeding and discharging port (4). The dust prevention and removal device for the lithium ion battery pole piece is simple in structure, can effectively isolate a pole piece roll material which is not cut from the external environment in the lithium ion battery production process, and meanwhile, dust removal treatment is carried out on the surface of the pole piece during winding and unwinding, so that the residue of dust in an electrode is reduced, the quality of the pole piece is improved, and the production cost is reduced. The battery performance stability is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium ion battery production, and more specifically relates to a lithium ion battery pole piece dust prevention and removal device. Background Art

[0002] As lithium-ion batteries become increasingly widely used in energy storage, marine applications, and other large-scale applications, battery system safety requirements are becoming increasingly stringent. Cell safety is the most fundamental aspect of lithium-ion battery system safety management. Most battery system fires develop from thermal runaway of a single cell, so improving the safety of a single cell is fundamental to improving system safety.

[0003] There are many reasons for thermal runaway of battery cells, among which the introduction of foreign matter and dust is one of the important reasons. The introduction of tiny foreign matter is usually caused during the production process. Some micron-level dust can easily escape the monitoring of people or equipment and eventually remain in the electrode.

[0004] Current lithium battery production usually controls the dust-free level of the factory, but the operation of equipment and the movement of personnel will inevitably bring in dust, and the dust removal mechanism on the equipment is often unable to effectively isolate the contact between the electrode and the external environment, resulting in dust contacting and adhering to the electrode whether the electrode is being wound or unwound. The electrode with dust attached will inevitably affect the battery performance.

[0005] In the prior art, there is a technology named "A dust removal mechanism for rolling battery pole pieces" and with a publication (announcement) number of "CN213256301U". This technology provides a dust removal mechanism for rolling battery pole pieces, which is arranged on a machine base and located between a conveying mechanism and a rolling mechanism; the dust removal mechanism includes a dust cover, a sweeping roller device, a dust collecting trough and a dust suction assembly; the dust cover is connected to the machine base; the sweeping roller device includes an upper sweeping roller assembly and a lower sweeping roller assembly for respectively cleaning dust on the upper and lower surfaces of the battery pole pieces; the upper sweeping roller assembly and the lower sweeping roller assembly are arranged on the machine base relative to each other up and down and are located inside the dust cover, and a dust removal station for the battery pole pieces is located between the upper sweeping roller assembly and the lower sweeping roller assembly, and the dust removal station is connected to the conveying mechanism; the dust collecting trough is connected to the dust cover and is located below the lower sweeping roller assembly; the dust suction assembly is arranged inside the machine base and connected to the dust collecting trough. The dust removal mechanism of the battery pole sheet roller of the utility model can effectively clean the dust attached to the battery pole sheet and avoid secondary pollution of the battery pole sheet by floating dust and other impurities, thereby improving the production quality of the battery pole sheet.

[0006] However, this technology does not involve the technical problems and technical solutions of the present application. Utility Model Content

[0007] The technical problem to be solved by the utility model is: in view of the deficiencies of the existing technology, a lithium-ion battery electrode dust prevention and removal device is provided which has a simple structure and can effectively isolate the uncut electrode coil from the external environment during the lithium battery production process, and at the same time remove dust from the electrode surface during winding and unwinding, thereby reducing dust residue in the electrode, improving the electrode quality, and ensuring stable battery performance.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0009] The utility model is a lithium ion battery pole piece dust prevention and removal device, comprising an outer cover, a reel, and a connecting belt. An inlet and outlet are arranged on one side of the outer cover, the reel is installed inside the outer cover, and a dust collector is arranged at the inlet and outlet.

[0010] The reel is configured as a structure that can be sleeved on a rotating shaft.

[0011] The bottom of the outer cover is connected to the base through a bracket.

[0012] The side surface of the outer cover is provided with an opening.

[0013] The outer cover comprises an upper outer cover component and a lower outer cover component.

[0014] The outer cover upper component and the outer cover lower component are configured to be connected to each other by a locking hook and locking ring component.

[0015] When the rotating shaft is combined with the outer cover, the rotating shaft is configured to be able to be clamped in the opening of the outer cover.

[0016] Dust collectors are respectively installed on the upper and lower parts of the inlet and outlet.

[0017] When the lithium-ion battery pole piece dust prevention and removal device reels or unreels the pole piece, the connecting belt is configured to be able to connect the pole piece and the reel.

[0018] In the outer cover, feeding and discharging rollers are arranged near the feeding and discharging ports.

[0019] The technical solution of this utility model is adopted, and the working principle and beneficial effects are as follows:

[0020] The lithium-ion battery electrode dust removal device described in this utility model has a closed outer cover that encloses the electrode reel and electrode sheet, ensuring reliable isolation from the external environment during both winding and unwinding. The outer cover has a reel at the center, which holds the electrode reel and rotates to wind or unwind the electrode sheet. The reel rotates via a shaft connected to the side of the outer cover. The reel includes a connecting strap, one end of which is fixed to the reel and the other end of which is connected to one end of the electrode sheet. A feed inlet and outlet are located on one side of the outer cover for winding and unwinding the electrode sheet. A dust collector is located outside the feed inlet and outlet, using electrostatic adsorption and vacuum to remove dust and foreign matter from the surface of the electrode sheet passing through the feed inlet and outlet. When winding the electrode sheet, the outer cover is mounted outside the corresponding shaft to securely enclose the reel. The connecting strap is pulled out through the feed inlet and outlet to the outside of the outer cover, where it is connected to the end of the electrode sheet to be wound using adhesive tape. The dust collector is then turned on, the shaft starts rotating, and the winding process begins. The electrode is continuously wound onto the reel via the connecting belt, forming a coil. The unwinding process is the reverse of the winding process. This ensures that the electrode is reliably isolated from the external environment during both winding and unwinding, and dust is reliably removed during both processes, effectively preventing dust from clinging to the electrode surface and potentially affecting the quality of the electrode and battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following is a brief description of the contents and symbols in the drawings of this specification:

[0022] Figure 1 This is a schematic structural diagram of the lithium-ion battery electrode dust prevention and removal device according to the present invention;

[0023] Figure 2 This is a schematic structural diagram of the lithium-ion battery electrode dust prevention and removal device of the present invention when an electrode roll is formed on the reel;

[0024] The marks in the accompanying drawings are: 1. outer cover; 2. reel; 3. connecting belt; 4. inlet and outlet; 5. dust collector; 6. rotating shaft; 7. bracket; 8. base; 9. pole roll; 10. upper assembly of outer cover; 11. lower assembly of outer cover; 12. pole piece; 13. inlet and outlet rods. DETAILED DESCRIPTION

[0025] The following is a detailed description of the embodiments of the present invention, such as the shapes, structures, positions and connections of the various components involved, the functions and working principles of the various components, etc., by referring to the accompanying drawings.

[0026] As attached Figure 1 -Attached Figure 2As shown, the present invention is a dust-proof and dust-removal device for lithium-ion battery electrode sheets, comprising an outer cover 1, a reel 2, and a connecting strap 3. An inlet and outlet port 4 is provided on one side of the outer cover 1, and the reel 2 is mounted inside the outer cover 1. A dust collector 5 is located at the inlet and outlet port 4. This structure addresses the shortcomings of the prior art and provides an improved technical solution. In the structural configuration, the outer cover 1 is a closed structure, used to enclose the reel 2 and the electrode sheet 12, ensuring that the electrode sheet 12 is reliably isolated from the external environment, whether it is being wound or unwound. The reel 2 is located at the center of the outer cover 1, where it is mounted. Rotating the reel 2 allows the electrode sheet 12 to be wound or unwound. The reel 2 is driven to rotate by a shaft connected to the side of the outer cover 1. The reel 2 has a connecting strap 3 attached to one end of the reel 2, one end of which is connected to one end of the electrode sheet. The inlet and outlet port 4 is provided on one side of the outer cover 1 for winding and unwinding the electrode sheet 12. A dust collector 5 is provided outside the inlet and outlet 4, and uses electrostatic adsorption and exhaust to remove dust and foreign matter on the surface of the electrode 12 passing through the inlet and outlet 4. When the electrode 12 is wound, the outer cover 1 is installed on the outside of the corresponding rotating shaft to reliably close the reel 2. The connecting belt 3 is pulled out to the outside of the outer cover 1 through the inlet and outlet 4. The connecting belt 3 is connected to the end of the electrode to be wound by tape outside the outer cover 1. Then the dust collector 5 is turned on, the rotation of the rotating shaft is started, and the winding action begins. The electrode 12 is continuously wound onto the reel 2 through the connecting belt 3 to form a pole roll 9. The unwinding process is the opposite of the winding process. In this way, it is ensured that the electrode 12 is reliably isolated from the external environment whether it is winding or unwinding, and dust removal is reliably achieved during both the winding and unwinding processes, effectively avoiding the hidden danger of dust adhering to the surface of the electrode and affecting the quality of the electrode and battery. The lithium-ion battery pole piece dust prevention and removal device described in the utility model has a simple structure and can effectively isolate the uncut plate rolls from the external environment during the lithium battery production process. At the same time, the pole piece surface is dusted during winding and unwinding, thereby reducing dust residue in the electrode, improving the pole piece quality, and ensuring stable battery performance.

[0027] The reel 2 is configured to be mounted on the shaft 6. In the above structure, the shaft is driven by a motor to rotate, and the reel can be switched between winding and unwinding by rotating in different directions.

[0028] The bottom of the outer cover 1 is connected to the base 8 through a bracket 7. The base is a support seat or bottom surface, and the bracket is fixedly connected to the base to reliably support the outer cover and fix the position of the outer cover.

[0029] The side of the outer cover 1 is provided with openings.

[0030] The outer cover 1 comprises an upper cover assembly 10 and a lower cover assembly 11. These upper and lower covers are configured to connect via a hook and ring assembly. When assembled with the outer cover 1, the rotating shaft 6 is configured to fit within the opening of the outer cover 1. With this structure, the outer cover 1 is divided into the upper and lower covers 11, allowing for easy assembly when needed and disassembly for removal when not in use. A sealing ring is provided between the opening and the rotating shaft, ensuring that rotation does not affect the seal of the outer cover.

[0031] Dust collectors 5 are installed on the upper and lower parts of the inlet and outlet 4. In the above structure, two dust collectors 5 are installed outside the inlet and outlet, which use electrostatic adsorption and exhaust to remove dust and foreign matter in the inlet and outlet 4, and can also remove dust attached to the upper and lower surfaces of the electrode 12.

[0032] When the lithium-ion battery electrode dust removal device reels or unwinds the electrode 12, the connecting belt 3 is configured to connect the electrode 12 to the reel 2. With the above structure, the connecting belt 3 reliably connects the electrode 12, and the electrode reel 9 is formed after the electrode 12 is reeled onto the reel 2.

[0033] The outer cover 1 is provided with an inlet and outlet roller 13 near the inlet and outlet 4. In the above structure, the inlet and outlet 4 is provided with an inlet and outlet roller 13, which positions the electrode 12 in and out of the outer cover 1 to avoid damage to the electrode coating caused by direct contact between the electrode 12 and the outer cover 1.

[0034] The lithium-ion battery electrode dust prevention and removal device described in the present invention has a structure in which the outer cover 1 is a closed structure, which is used to enclose the reel 2 and the electrode 12, so that the electrode 12 is reliably isolated from the external environment whether it is being wound or unwound. The inner center of the outer cover 1 is the reel 2, which is used to install the electrode reel. The rotation of the reel 2 can wind up or unwind the electrode 12. The reel 2 is driven to rotate by a rotating shaft, and the rotating shaft is connected to the side of the outer cover 1. The reel 2 is provided with a connecting belt 3, one end of which is fixed on the reel 2, and one end of the connecting belt 3 is used to connect to one end of the electrode. An inlet and outlet port 4 is provided on one side of the outer cover 1 for winding and unwinding the electrode 12. A dust collector 5 is provided outside the inlet and outlet port 4, which uses electrostatic adsorption and exhaust to remove dust and foreign matter on the surface of the electrode 12 passing through the inlet and outlet port 4. When winding the electrode 12, the outer cover 1 is installed on the outside of the corresponding rotating shaft to reliably close the reel 2. The connecting belt 3 is pulled out to the outside of the outer cover 1 through the inlet and outlet 4. The connecting belt 3 is connected to the end of the electrode to be wound through the tape on the outside of the outer cover 1. Then the dust collector 5 is turned on, the rotation of the rotating shaft is started, and the winding action begins. The electrode 12 is continuously wound onto the reel 2 through the connecting belt 3 to form a pole roll 9. The unwinding process is the opposite of the winding process. In this way, it is ensured that the electrode 12 is reliably isolated from the external environment whether it is winding or unwinding, and dust removal is reliably achieved during the winding and unwinding processes, effectively avoiding the hidden danger of dust adhering to the surface of the electrode and affecting the quality of the electrode and battery.

[0035] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A dust prevention and removal device for lithium-ion battery pole pieces, characterized by: The invention comprises an outer cover (1), a reel (2), and a connecting belt (3); a material inlet and outlet (4) is provided on one side of the outer cover (1); the reel (2) is installed inside the outer cover (1); and a dust collector (5) is provided at the position of the material inlet and outlet (4).

2. The dust-proof and dust-removing device for lithium-ion battery pole pieces according to claim 1, characterized in that: The reel (2) is configured as a structure capable of being sleeved on the rotating shaft (6).

3. The dust-proof and dust-removing device for lithium-ion battery pole pieces according to claim 1 or 2, characterized in that: The bottom of the outer cover (1) is connected to the base (8) via a bracket (7).

4. The dust-proof and dust-removing device for lithium-ion battery pole pieces according to claim 1 or 2, characterized in that: The outer cover (1) is provided with an opening on the side.

5. The dust prevention and removal device for lithium-ion battery pole pieces according to claim 1 or 2, characterized in that: The outer cover (1) comprises an outer cover upper component (10) and an outer cover lower component (11).

6. The lithium-ion battery electrode dust prevention and removal device according to claim 5, characterized in that: The outer cover upper component (10) and the outer cover lower component (11) are configured as a structure capable of being connected by a locking hook and locking ring component.

7. The lithium-ion battery electrode dust prevention and removal device according to claim 2, characterized in that: When the rotating shaft (6) is combined with the outer cover (1), the rotating shaft (6) is configured as a structure capable of being clamped into an opening of the outer cover (1).

8. The dust prevention and removal device for lithium-ion battery pole pieces according to claim 1 or 2, characterized in that: Dust collectors (5) are installed on the upper and lower parts of the inlet and outlet (4), respectively.

9. The lithium-ion battery pole piece dust prevention and removal device according to claim 1 or 2, characterized in that: When the lithium-ion battery pole piece dust prevention and removal device reels or unwinds the pole piece (12), the connecting belt (3) is configured to be capable of connecting the pole piece (12) and the reel (2).

10. The lithium-ion battery pole piece dust prevention and removal device according to claim 1 or 2, characterized in that: A feeding and discharging rod (13) is provided in the outer cover (1) near the feeding and discharging port (4).

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