CN202655300U - Dust cleaning device of pole piece slitting machine - Google Patents

Abstract

The utility model belongs to the technical field of dust removal devices, in particular to a dust removal device for a pole piece slitting machine, which comprises a vacuum cavity, which is respectively provided with a pole piece exit slit and a pole piece entrance slit, and a pole piece exit slit There are upper brushes on both sides of the slit, and the two ends of the vacuum cavity are connected with dust suction ports, and the vacuum cavity is a tubular cavity. Compared with the prior art, the negative pressure in the vacuum chamber of the utility model can promote the formation of high-speed airflow between the pole piece inlet slit and the pole piece outlet slit, and the airflow can directly act on the surface of the pole piece to remove dust; at the same time, The upper brushes located on both sides of the pole piece outlet slit can clean the residual dust thoroughly to ensure a high dust removal rate. Moreover, the cross-section of the vacuum chamber is circular or oval, and there is no plane where dust can reside inside, so it can prevent dust from staying inside the vacuum chamber; in addition, the high-speed airflow from the exit slit of the pole piece can blow away Dust in the brush to avoid secondary pollution.

Description

Dust removal device for pole piece slitting machine

technical field

The utility model belongs to the technical field of dust removal devices, and in particular relates to a pole piece slitting that can not only ensure the dust removal rate, but also prevent dust particles from staying in the low air velocity area and the brush in the vacuum cavity, thereby reducing secondary pollution Machine dust removal device.

Background technique

As an important part of lithium-ion batteries, battery pole pieces have a very important impact on the performance of lithium-ion batteries. The production process of lithium-ion batteries generally includes stirring, coating, cold pressing, slitting, winding or stacking, liquid injection, packaging, formation and capacity, etc. Among them, when the battery pole piece is compacted and divided into strips, it is easy to generate free particles, which will pollute the surface of the pole piece and adversely affect the internal resistance and self-discharge performance of the battery. In order to enhance the stability of battery performance, battery manufacturers have higher requirements on the particle size and amount of dust remaining on the surface of the pole piece. Generally, the maximum particle size of the dust on the surface of the battery pole piece before winding is required to be below 8 μm. If large-sized particles remain on the surface of the pole piece, it will cause stress concentration in the local microstructure of the lithium-ion battery, resulting in local damage during further processing and use, which may easily lead to safety accidents.

At present, the powder dust suction device on the slitting machine generally includes a vacuum chamber and a brush placed in the vacuum chamber. Due to the inconsistent distribution of wind speed in the vacuum chamber, it is easy to cause a large number of particles to reside in the lower wind speed area of the chamber, which will affect the performance of the battery. However, if the powder is brushed with a brush, particles embedded in the surface of the pole piece in the brush often appear, causing secondary pollution to the pole piece.

In view of this, it is necessary to provide a pole piece slitting machine dust removal that can not only ensure the dust removal rate, but also avoid the dust particles staying in the low air velocity area and the brush in the vacuum chamber, thereby reducing secondary pollution. device.

Contents of the invention

The purpose of this utility model is to: aim at the deficiencies of the prior art, and provide a dust removal rate that can not only ensure, but also prevent dust particles from staying in the low air velocity area and the brush in the vacuum chamber, thereby reducing secondary pollution. The dust removal device of the pole piece slitting machine is used to overcome the shortcomings of the dust removal efficiency of the pole piece slitting machine dust removal device in the prior art, the dust particles are easy to stay in the vacuum cavity and the brush, and cause secondary pollution .

In order to achieve the above object, the utility model adopts the following technical solutions:

A dust removal device for a pole piece slitting machine, comprising a vacuum chamber, the vacuum chamber is respectively provided with a pole piece exit slit and a pole piece entrance slit, the two sides of the pole piece exit slit are provided with upper wool brush, the two ends of the vacuum cavity are connected with suction ports, and the vacuum cavity is a tubular cavity.

As an improvement of the dust removal device of the pole piece slitting machine of the utility model, the section of the vacuum cavity is circular.

As an improvement of the dust removal device of the pole piece slitting machine of the utility model, the section of the vacuum cavity is elliptical.

As an improvement of the dust removal device of the pole piece slitting machine of the utility model, lower brushes are arranged on both sides of the pole piece entrance slit.

As an improvement of the dust removal device of the pole piece slitting machine of the utility model, the upper brushes are evenly distributed on both sides of the pole piece outlet slit, and the lower brushes are evenly distributed on the pole piece inlet slit seam on both sides.

As an improvement of the dust removal device of the pole piece slitting machine of the utility model, the two suction ports at both ends of the vacuum chamber are respectively smoothly connected with the vacuum chamber.

As an improvement of the dust removal device of the pole piece slitting machine of the utility model, the pole piece inlet slit and the pole piece outlet slit are symmetrically distributed in the vacuum cavity.

As an improvement of the dust removal device of the pole piece slitting machine of the utility model, the two suction ports at both ends of the vacuum chamber are symmetrically distributed at both ends of the vacuum chamber.

Compared with the prior art, the negative pressure in the vacuum cavity of the utility model can promote the formation of a high-speed airflow between the pole piece inlet slit and the pole piece outlet slit, and the airflow can directly act on the surface of the pole piece to remove dust; at the same time, The upper brushes located on both sides of the pole piece outlet slit can clean the residual dust thoroughly, ensuring high dust removal rate, improving the surface quality of the pole piece, and improving the cycle performance and safety performance of the battery. Moreover, the vacuum cavity is a tubular cavity, and there is no plane where dust can reside inside, so it can prevent the dust from staying inside the vacuum cavity; in addition, the high-speed airflow from the outlet slit of the pole piece can blow away the particles embedded in the brush. Dust, realize the self-cleaning of the brush, and avoid secondary pollution.

Description of drawings

The utility model and its beneficial effects will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the front view of the utility model.

Fig. 2 is a side view of the utility model.

Fig. 3 is the perspective view of the utility model.

Detailed ways

The utility model and its beneficial effects will be further described in detail below in conjunction with specific implementation methods and accompanying drawings, but the implementation of the utility model is not limited thereto.

As shown in Figure 1, Figure 2 and Figure 3, a pole piece slitting machine dust removal device provided by the utility model includes a vacuum chamber 3, and the vacuum chamber 3 is respectively provided with a pole piece outlet slit 4 and a pole piece. The sheet inlet slit 8 and the pole piece outlet slit 4 are provided with upper brushes 6 on both sides, and the two ends of the vacuum chamber 3 are connected with dust suction ports 1, and the vacuum chamber 3 is a tubular chamber.

Wherein, the section of the vacuum chamber 3 is circular or elliptical, and there is no plane where dust can reside inside the tubular vacuum chamber 3, so it can prevent the dust from staying inside the vacuum chamber 3 and avoid causing secondary pollution. pollute. The design of the structure of the vacuum chamber 3 is optimized by fluid dynamics simulation analysis, which can save the air source to the greatest extent while ensuring the dust removal effect, and at the same time ensure that the transverse wind speed on the pole piece 5 is consistent. When the section of the vacuum cavity 3 is circular, the above requirements can be best met.

Wherein, the negative pressure in the vacuum cavity 3 promotes the formation of a high-speed airflow between the pole piece inlet slit 8 and the pole piece exit slit 4, which can directly act on the surface of the pole piece 5 to remove dust. The upper brushes 6 arranged on both sides of the exit slit 4 of the pole piece can thoroughly clean the residual dust. The two dust removal methods work together to ensure a high dust removal rate.

Wherein, lower brushes 7 are provided on both sides of the pole piece entrance slit 8 . The upper brush 6 and the lower brush 7 play a sealing role to prevent the vacuum chamber 1 from excessive loss of pressure.

The upper brushes 6 are evenly distributed on both sides of the exit slit 4 of the pole piece, and the lower brushes 7 are evenly distributed on both sides of the entrance slit 8 of the pole piece. The material selection of the brush is optimized through numerical simulation analysis, so as to ensure that the dust removal effect is ensured while not causing damage to the pole piece 5 itself. In actual use, a flat brush is used, and the high-speed airflow from the outlet slit 4 of the pole piece can blow away the dust embedded in the upper brush 6, thereby realizing the self-cleaning of the brush.

The two dust suction ports 1 at both ends of the vacuum chamber 3 are smoothly connected to the vacuum chamber 3 , specifically, the dust suction port 1 and the vacuum chamber 3 are integrated smoothly to minimize obstacles in the dust path.

The pole piece inlet slit 8 and the pole piece exit slit 4 are symmetrically distributed on the vacuum chamber 3 , so that the air flow can evenly act on the pole piece 5 located between the pole piece entrance slit 8 and the pole piece exit slit 4 .

The two dust suction ports 1 at both ends of the vacuum chamber 3 are symmetrically distributed on both ends of the vacuum chamber 3 , so as to facilitate the suction of dust particles in the vacuum chamber 3 .

In actual use, the pole piece 5 enters from the pole piece entrance slit 8 from bottom to top, passes through two rows of lower brushes 7, and enters the vacuum cavity 3 . In order to prevent the lower brush 7 from brushing the dust out of the vacuum cavity 3, the lower brush 7 should have a certain opening.

The pole piece 5 running in the vacuum chamber 3 is impacted by the high-speed airflow from the pole piece inlet slit 8 and the pole piece outlet slit 4, and completes the first dust removal action (airflow impact dust removal). The lower brushes 7 arranged on both sides of the pole piece inlet slit 8 and the upper brushes 6 arranged on both sides of the pole piece outlet slit 4 can prevent the vacuum chamber 3 from excessive pressure loss, and at the same time ensure the wind speed of the impinging airflow, Ensure the strength of air impact dust removal. the

The dust removed by the impact dust removal is sucked away by the dust suction ports 1 located at both ends of the vacuum chamber 3 through the vacuum chamber 3 to complete the dust removal action.

The dust that has not been removed by the airflow impact dust removal action is brought to the upper brush 6 by the pole piece 5. In order to ensure the powder brushing force and the large enough airflow impact force, the upper brush 6 needs to be set with a smaller opening. The pole piece 5 passes through the two rows of "door curtain" upper brushes 6. At the same time, the residual dust is brushed off by the upper brushes 6, and the brushed dust passes through the vacuum chamber 3 and is discharged by the dust suction ports 1 located at both ends of the vacuum chamber 3. Suck it away to complete the second dust removal action (brush powder dust removal).

Two dust removal actions (airflow impact dust removal and brush powder dust removal) ensure the dust removal rate, and the dust embedded in the upper brush 6 and the lower brush 7 enters through the pole piece inlet slit 8 and the pole piece exit slit 4 The high-speed airflow impacts and is blown into the vacuum cavity 3, thereby realizing the cleaning of the upper brush 6 and the lower brush 7.

The tube-type vacuum chamber 3 and the smooth connection with the dust suction port 1 ensure that there is no dead angle in the vacuum chamber 3, and the dust is not easy to reside.

According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also make appropriate changes and modifications to the above embodiment. Therefore, the utility model is not limited to the specific implementation manners disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims (8)

1. A pole piece slitting machine dust removal device, characterized in that: it comprises a vacuum cavity, and the vacuum cavity is respectively provided with a pole piece exit slit and a pole piece entrance slit, and the pole piece exit slit Both sides are provided with upper brushes, and the two ends of the vacuum cavity are respectively provided with suction ports, and the vacuum cavity is a tubular cavity. 2. The dust removal device for pole piece slitting machine according to claim 1, characterized in that: the section of the vacuum cavity is circular. 3. The dust removal device for pole piece slitting machine according to claim 1, characterized in that: the cross-section of the vacuum cavity is elliptical. 4. The dust removal device for pole piece slitting machine according to claim 1, characterized in that: lower brushes are arranged on both sides of the pole piece entrance slit. 5. The dust removal device for pole piece slitting machine according to claim 4, characterized in that: the upper brushes are evenly distributed on both sides of the pole piece outlet slit, and the lower brushes are evenly distributed on the two sides of the pole piece outlet slit. Both sides of the entrance slit of the pole piece. 6 . The dust removal device for pole piece slitting machine according to claim 1 , characterized in that: the two suction ports at both ends of the vacuum chamber are respectively smoothly connected with the vacuum chamber. 7 . 7. The dust removal device for pole piece slitting machine according to claim 1, characterized in that: the pole piece entrance slit and the pole piece exit slit are symmetrically distributed in the vacuum cavity. 8. The dust removal device for pole piece slitting machine according to claim 1, characterized in that: the two suction ports at both ends of the vacuum chamber are symmetrically distributed at both ends of the vacuum chamber.

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