Dust removal device for lithium battery negative electrode rolling

Abstract

The utility model discloses a dust removal device for lithium battery negative electrode rolling, which is installed on a machine body of a roller press, the dust removal device comprises a negative pressure cavity and a U-shaped dust collection cavity, the negative pressure cavity clings to the lateral lower part of a roller, a first negative pressure dust suction port is arranged on the negative pressure cavity, the first negative pressure dust suction port is connected with a negative pressure dust suction pipe, and the U-shaped dust collection cavity is connected with the negative pressure dust suction pipe. A dust removal scraper and a wiping roller are arranged on the roller and are both arranged in the negative pressure cavity; the U-shaped dust collection cavity is arranged at the bottom of the negative pressure cavity, a spiral push rod is arranged in the U-shaped dust collection cavity and connected with the driving mechanism, and a second negative pressure dust suction port is formed in the bottom of the U-shaped dust collection cavity on the side, away from the driving mechanism, of the spiral push rod. The dust removal device for rolling the negative electrode of the lithium battery, provided by the utility model, is matched with the dust removal scraper and the roller wiping equipment of the roller to suck away dust generated in the rolling process, so that the problem of dust generated in the rolling process of a pole piece is solved, and the dust can be effectively prevented from being adhered to the roller for the second time and falling on the pole piece.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a dust removal device for roller pressing a negative electrode of a lithium battery. Background Art

[0002] During the negative electrode rolling process of the actual production of square lithium-ion batteries, the dust stuck to the main roller will be removed by a scraper and a wiping roller device. After removal, some of the dust will float into the air, and some large particles will accumulate under the scraper and the wiping roller device. These dusts will adhere to the main roller or the negative electrode sheet for a second time. If these dusts are brought into the subsequent process through the electrode sheet, they will cause a short circuit inside the battery after it is manufactured, and may even lead to safety hazards such as battery explosion. Utility Model Content

[0003] 1. Technical problems to be solved:

[0004] In view of the above technical problems, the utility model provides a dust removal device for roller pressing of lithium battery negative electrodes.

[0005] 2. Technical solution:

[0006] A dust removal device for rolling a negative electrode of a lithium battery is installed on the body of a roller press, the dust removal device includes a negative pressure cavity and a U-shaped dust collecting cavity, the negative pressure cavity is tightly attached to the side and lower part of the roller, a first negative pressure dust suction port is provided on the negative pressure cavity, the first negative pressure dust suction port is connected to the negative pressure dust suction pipe, a dust removal scraper and a wiping roller are provided on the roller, the dust removal scraper and the wiping roller are both arranged inside the negative pressure cavity; the U-shaped dust collecting cavity is arranged at the bottom of the negative pressure cavity, a screw push rod is provided in the U-shaped dust collecting cavity, the screw push rod is connected to a driving mechanism, and a second negative pressure dust suction port is provided at the bottom of the U-shaped dust collecting cavity on the side of the screw push rod away from the driving mechanism.

[0007] Furthermore, the negative pressure cavity is composed of two funnel-shaped cavities, and each funnel-shaped cavity is provided with a first negative pressure dust suction port.

[0008] Furthermore, the driving mechanism includes a driven gear fixedly connected to one end of the spiral push rod extending out of the U-shaped dust collecting chamber, the driven gear is connected to the driving gear through a chain, and the driving gear is fixedly connected to the movable end of the motor.

[0009] Furthermore, the edges of the negative pressure cavity and the U-shaped dust collecting cavity close to the roller are all provided with sealing strips.

[0010] Furthermore, three dust removal devices are installed on the roller press, two of which are installed below the front and rear sides of the upper roller, and the other is installed below the front side of the lower roller.

[0011] 3.Beneficial effects:

[0012] The utility model proposes a dust removal device for lithium battery negative electrode roller pressing. It cooperates with the roller's dust removal scraper and roller wiping equipment to remove the dust generated during the rolling process, solving the dust problem generated by the electrode rolling process. It can effectively prevent dust from secondary sticking to the roller and dust from falling on the electrode. It prevents dust from being carried into subsequent processes through the electrode, effectively improving production quality and ensuring high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the installation structure of the dust removal device for roller pressing the negative electrode of a lithium battery of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the dust removal device for roller pressing the negative electrode of a lithium battery of the present invention;

[0015] Figure 3 This is a top view of the dust removal device for roller pressing the negative electrode of a lithium battery according to the present invention. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings.

[0017] As attached Figure 1 To the attached Figure 3 ,

[0018] Specific embodiment: A dust removal device for rolling the negative electrode of a lithium battery is installed on the body 1 of the roller press, and the dust removal device includes a negative pressure chamber 2 and a U-shaped dust collecting chamber 3. The negative pressure chamber 2 is tightly attached to the side and lower part of the roller 4 of the roller press, and a first negative pressure dust suction port 5 is provided on the negative pressure chamber 2, and the first negative pressure dust suction port 5 is connected to the negative pressure dust suction pipe. The roller 4 is provided with a dust removal scraper and a wiping roller, and the dust removal scraper and the wiping roller are both arranged inside the negative pressure chamber 2; the U-shaped dust collecting chamber 3 is arranged at the bottom of the negative pressure chamber 2, and a screw push rod 6 is provided in the U-shaped dust collecting chamber 3, and the screw push rod 6 is connected to the driving mechanism, and a second negative pressure dust suction port 7 is provided at the bottom of the U-shaped dust collecting chamber 3 on the side of the screw push rod 6 away from the driving mechanism.

[0019] The working principle of the dust removal device for lithium battery negative electrode roller pressing of the utility model is as follows: when the roller 4 needs to be dusted, the dust scraper and wiping roller work to remove the dust on the roller 4. After removal, some of the dust will float into the air. This part of the dust is sucked in by the negative pressure at the negative pressure dust suction pipe, collected by the negative pressure chamber 2, and extracted from the first negative pressure dust suction port 5. The remaining large particles of dust fall into the U-shaped dust collection chamber 3, and the spiral push rod 6 pushes the dust to the second negative pressure dust suction port 7 for extraction.

[0020] The negative pressure chamber 2 is composed of two funnel-shaped chambers, each of which is provided with a first negative pressure dust suction port 5. The funnel-shaped structure facilitates the collection of dust in the gas.

[0021] The driving mechanism includes a driven gear 8 fixedly connected to one end of the spiral push rod 6 extending out of the U-shaped dust collecting chamber 3. The driven gear 8 is connected to the driving gear through a chain, and the driving gear is fixedly connected to the movable end of the motor.

[0022] The edges of the negative pressure chamber 2 and the U-shaped dust collecting chamber 3 close to the roller 4 are all provided with sealing strips to ensure that the dust does not float away and the negative pressure does not leak.

[0023] The roller press is equipped with three dust removal devices, two of which are installed under the front and rear sides of the upper roller 4, and the other is installed under the front side of the lower roller 4. The three dust removal devices are used in coordination to make dust removal more efficient.

[0024] Although the present invention has been disclosed above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined by the claims of this application.

Claims

1. A dust removal device for roller pressing of lithium battery negative electrode, installed on the body of roller press, characterized in that: The dust removal device includes a negative pressure cavity and a U-shaped dust collecting cavity. The negative pressure cavity is tightly attached to the side and lower part of the roller. A first negative pressure dust suction port is provided on the negative pressure cavity, and the first negative pressure dust suction port is connected to the negative pressure dust suction pipe. A dust removal scraper and a wiping roller are provided on the roller, and the dust removal scraper and the wiping roller are both arranged inside the negative pressure cavity; the U-shaped dust collecting cavity is arranged at the bottom of the negative pressure cavity, and a spiral push rod is provided in the U-shaped dust collecting cavity, and the spiral push rod is connected to the driving mechanism. A second negative pressure dust suction port is provided at the bottom of the U-shaped dust collecting cavity on the side of the spiral push rod away from the driving mechanism.

2. A dust removal device for roller pressing a negative electrode of a lithium battery according to claim 1, characterized in that: The negative pressure cavity is composed of two funnel-shaped cavities, and each funnel-shaped cavity is provided with a first negative pressure dust suction port.

3. A dust removal device for roller pressing a lithium battery negative electrode according to claim 2, characterized in that: The driving mechanism comprises a driven gear fixedly connected to one end of the spiral push rod extending out of the U-shaped dust collecting chamber, the driven gear is connected to the driving gear through a chain, and the driving gear is fixedly connected to the movable end of the motor.

4. A dust removal device for roller pressing a negative electrode of a lithium battery according to claim 1, characterized in that: The edges of the negative pressure cavity and the U-shaped dust collecting cavity close to the roller are all provided with sealing strips.

5. A dust removal device for roller pressing a negative electrode of a lithium battery according to claim 4, characterized in that: The roller press is equipped with three dust removal devices, two of which are respectively installed below the front and rear sides of the upper roller, and the other is installed below the front side of the lower roller.

Images