CN109175683B - Pole piece dust collector - Google Patents

Abstract

The present invention discloses a dust removal device, which includes a housing, a blower and an ion generator. The housing is provided with a receiving cavity, the housing is provided with a tape-walking gap for the pole piece to pass through along the z-axis direction, a light inlet for introducing a cutting light beam into the receiving cavity along the x-axis direction, and an air inlet and a dust suction port respectively located on both sides of the y-axis direction; the blower is located on one side of the air inlet, and the ion generator is located in the blowing path of the blower. The ion generator is used to ionize the gas blown into the receiving cavity by the blower, so that the pole piece and the dust are both charged with the same charge, thereby avoiding the dust from adhering to the pole piece and improving the dust removal effect.

Description

A kind of dust removal device for pole piece

Technical Field

The present invention relates to the technical field of power batteries, and in particular to a dust removal device for pole piece cutting.

Background technique

The battery production process involves cutting of pole pieces. Specifically, in the lithium-ion battery production process, the pole ears on the pole pieces need to be obtained by laser cutting. A large amount of dust will be generated in the process of laser cutting pole pieces, which will not only pollute the laser lens and fixtures such as the clamp, but also reduce the processing efficiency and accuracy. The dust will adhere to the surface of the workpiece to be cut, causing friction with the workpiece and causing damage. Not only that, the dust will spread into the air to pollute the environment and affect the health of the staff. If these dusts adhere to the pole ears or coils and are brought into the subsequent processes of cutting, they may even be drawn into the battery, easily piercing the diaphragm paper in the battery cell, causing a micro-short circuit in the battery, and in severe cases, leading to major safety accidents such as battery explosions.

The existing dust removal device mainly opens an air intake channel on the cutting seat. When in use, the powder is sucked through the dust suction nozzle. This method usually has problems such as dust accumulation that cannot be completely removed, dust adhering to the surface of the pole piece and contaminating the pole piece, not being suitable for dust removal under different power lasers, dust rebounding back to the pole piece at high speed after laser cutting, and dust removal sucking into the waste belt.

Summary of the invention

In order to solve the above technical problems, an embodiment of the present invention provides a pole piece dust removal device.

To achieve the above object, the technical solution of the present invention is achieved as follows:

An embodiment of the present invention discloses a dust removal device for a pole piece, which comprises a shell, a blower fan and an ion generator. A containing cavity is arranged in the shell, and the shell is provided with a tape running gap for the pole piece to pass through along the z-axis direction, a light inlet for introducing a cutting light beam into the containing cavity along the x-axis direction, and an air inlet and a dust suction port respectively located on both sides of the y-axis direction; the blower fan is located on one side of the air inlet, and the ion generator is located in the blowing path of the blower fan.

In the above solution, the dust removal device also includes an electromagnetic field generator capable of generating a magnetic field along the x-axis direction in the accommodating cavity, and the magnetic field generates a downward Lorentz force on the charged dust in the blowing path of the blower.

In the above solution, the electromagnetic field generator includes an induction coil and a power supply, and the magnetic field is generated after the induction coil is connected to the power supply.

In the above solution, the lowest height of the dust suction port in the z-axis direction is lower than the lowest height of the air inlet part in the z-axis direction.

In the above solution, the dust removal device also includes an electric field generator capable of generating an electric field along the y-axis direction in the accommodating cavity.

In the above scheme, the electric field generator includes a first charged plate and a second charged plate, the charge carried by the first charged plate is opposite to the charge carried by the second charged plate; the first charged plate is located at the air inlet, and the second charged plate is located at the dust suction port.

In the above solution, the air inlet portion and the dust suction port are arranged opposite to each other, and the air inlet portion and the dust suction port have the same height in the y-axis direction.

In the above solution, the ion generator is a positive ion generator or a negative ion generator, and the ion generator is located in the air inlet.

In the above solution, the dust removal device also includes an adsorbent, which is located at the dust suction port, and the adsorbent carries an electric charge opposite to the electric charge carried by the ions generated by the ion generator.

In the above solution, the air inlet portion is an air inlet or an air knife;

And/or the housing is further provided with a light outlet or a light absorbing member, and the light outlet or the light absorbing member corresponds to the light entrance.

An embodiment of the present invention provides a pole piece dust removal device, wherein the pole piece cutting process is carried out in a receiving cavity defined by a shell, the pole piece is inserted into a belt running gap, a cutting light beam enters the receiving cavity from a light entrance to cut the pole piece, a blower blows air into the receiving cavity through an air inlet, and an ion generator is used to ionize the gas blown into the receiving cavity by the blower, so that the pole piece and the dust carry the same charge, thereby avoiding dust adhering to the pole piece and improving the dust removal effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a first optional structure of a dust removal device according to an embodiment of the present invention;

FIG2 is a side view of the dust removal device in FIG1 ;

FIG3 is a schematic diagram of a second optional structure of a dust removal device according to an embodiment of the present invention;

FIG4 is a side view of the dust removal device in FIG3 ;

FIG5 is a schematic diagram of a third optional structure of a dust removal device according to an embodiment of the present invention;

FIG6 is a side view of the dust removal device in FIG5 ;

FIG7 is a schematic diagram of a fourth optional structure of a dust removal device according to an embodiment of the present invention;

FIG8 is a side view of the dust removal device in FIG7 .

Figure numerals: housing 10; first slit 11; second slit 12; air inlet 13; dust suction port 14; light inlet 15; positive ion generator 16; adsorbent 17; accommodating cavity 18; pole piece 20; laser 30; laser beam 31; induction coil 40; first charged plate 50; second charged plate 60.

Detailed ways

In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by those skilled in the art belong to the protection scope of the present invention.

For the convenience of description, the up-down direction in Figures 1, 3, 5 and 7 is defined as the z-axis direction, the direction through which the cutting beam passes, i.e., left-right, is defined as the x-axis direction, and the front-back direction is defined as the y-axis direction. In Figures 1, 3, 5 and 7, the x-axis represents the x-axis direction, the y-axis represents the y-axis direction, and the z-axis represents the z-axis direction. It should be understood that these orientation definitions are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

As shown in FIGS. 1 to 8 , the pole piece dust removal device of the embodiment of the present invention includes a housing 10, a blower (not shown) and an ion generator. A housing 10 is provided with a housing 18. The housing 18 is preferably a relatively sealed cavity. As shown in FIGS. 1 to 8 , the housing 10 is shielded at the top, bottom, front, back, left and right to form a relatively sealed housing 18. Compared with the housing 18 with one side open, the relatively sealed housing 18 avoids the wind blown by the blower from having a large diffusion range, which affects the dust removal effect, and can also reduce dust splashing, thereby having a certain protective effect on the lens of the laser 30. The housing 10 can be an indivisible whole, or it can be composed of two or more parts.

Taking the dust removal device shown in FIG1 as an example, the housing 10 includes a tape running gap arranged on the upper and lower sides, a light inlet 15 for introducing a cutting light beam into the accommodating cavity 18 along the left or right side, and a dust suction port 14 and an air inlet respectively located on the front and rear sides of the housing 10. Specifically, the tape running gap includes a first gap 11 located on the upper side of the housing 10 and a second gap 12 located on the lower side of the housing 10, and the pole piece 20 is passed through the housing 10 in the up and down direction. The second gap 12 is arranged opposite to the first gap 11, and the lengths of the second gap 12 and the first gap 11 are not less than the width of the pole piece 20 to facilitate the passing of the pole piece 20. The light inlet 15 is located on the right side of the housing 10, and the light inlet 15 is arranged opposite to the pole piece 20 to cut the pole piece 20 to form a pole ear. Generally, a light outlet (not shown) or a light absorbing member (not shown) is also provided on the housing 10, and the light outlet or the light absorbing member corresponds to the light inlet 15. The cutting light beam entering the accommodating chamber 18 goes out from the light outlet or is absorbed by the light absorbing member. Preferably, the cutting light beam is absorbed by the light absorbing member, because this method reduces the number of holes opened on the housing 10, further reduces the diffusion of the wind field and dust, and thus further reduces the damage to the lens of the laser 30. The air inlet portion may be a wind knife arranged inside the accommodating chamber 18, and the blower blows air into the accommodating chamber 18 through the wind knife. In the embodiment shown in the present invention, the air inlet portion is an air inlet 13 arranged on the rear side of the housing 10, and the air inlet 13 is located in the blowing path of the blower, and the blower may be located on the rear side of the air inlet 13. The dust suction port 14 is located on the side opposite to the air inlet portion. The cutting light beam generally refers to the laser beam 31 emitted by the laser 30, and the laser 30 is arranged at the light inlet 15 outside the housing 10.

The blower is located on one side of the air inlet, and the ion generator is located in the blowing path of the blower. The ion generator can generate ions to ionize the wind blown by the blower, that is, the airflow entering the accommodating chamber 18 is charged, so that the pole piece 20 and the dust have the same charge. The mutual repulsion of the same charges greatly reduces the risk of dust adhering to the pole piece 20, thereby improving the product quality and safety. The ion generator can be a positive ion generator 16 or a negative ion generator.

The dust removal device also includes an adsorbent 17, which carries an electric charge opposite to the electric charge carried by the ions generated by the ion generator. As shown in Figures 1 to 8, the adsorbent 17 is located at the dust suction port 14. When the ion generator at the air inlet is a positive ion generator 16, the adsorbent 17 is a negatively charged component, so that the adsorbent 17 can adsorb positively charged dust, and can effectively and timely absorb the dust to avoid dust accumulation, reduce the risk of dust hitting the inner wall of the accommodating chamber 18 and rebounding onto the pole piece 20, and also reduce the diffusion of dust into the air. When the air inlet is a negative ion generator, the adsorbent 17 is a positively charged component accordingly.

In one embodiment of the invention, as shown in FIGS. 1 to 4 , the dotted arrows in FIGS. 1 and 3 point to the direction of the magnetic flux lines, the solid arrows in FIGS. 2 and 4 point to the direction of the air blower, and the outer shell 10 in FIGS. 2 and 4 is Represents the direction of magnetic flux lines. The dust removal device also includes an electromagnetic field generator capable of generating magnetic flux lines with a direction from right to left (Figure 1 or Figure 3) in the accommodating chamber 18. In this embodiment, the ion generator is a positive ion generator 16. Applying the "left-hand rule", the magnetic field generates a downward Lorentz force on the charged dust in the blowing path of the blower. Specifically, as shown in Figures 1 and 3, the air inlet is formed as an air inlet 13, and a positive ion generator 16 is provided at the air inlet 13. The dust suction port 14 is provided with a negatively charged adsorbent 17. The positive ion generator 16 causes the dust and the pole piece 20 located in the accommodating chamber 18 to be positively charged. The electromagnetic field generator includes an induction coil 40 and a power supply (not shown). After the power supply energizes the induction coil 40, it can generate a magnetic field from right to left in the accommodating chamber 18. The induction coil 40 can be arranged outside the housing 10 or inside the housing 10, as long as the induction coil 40 can generate a magnetic field in the accommodating chamber 18. Since the dust carries a positive charge and moves from the rear side to the front side of the housing 10, according to the "left-hand rule", the dust will be subjected to the downward Lorentz force. Under the combined effect of its own gravity and the Lorentz force, the dust will move to the bottom of the accommodating chamber 18. At this time, the dust suction port 14 can be set at a lower position, or the lowest position of the dust suction port 14 can be set at a lower position. As shown in Figures 1 and 2, since the openings of the air inlet 13 and the dust suction port 14 in the up and down directions are small and are located in the middle of the housing 10, the lowest height of the dust suction port 14 in the up and down directions is lower than the lowest height of the air inlet 13 in the up and down directions, which is convenient for dust discharge. The air inlet 13 and the dust suction port 14 in Figures 1 and 2 are both circular, and other shapes can also be selected. As shown in Figures 3 and 4, the air inlet 13 and the dust suction port 14 are both long strips extending in the up and down directions. This setting method can avoid dust removal dead corners and has a better dust removal effect in a three-dimensional space. It should be noted that in an embodiment not shown in the present invention, the long strip air inlet 13 or the dust suction port 14 can be connected to the first slit 11 and the second slit 12 at the same time, so that the dust suction port 14 or the air inlet 13 can also cooperate with the first slit 11 and the second slit 12 to form another form of running gap at the same time. This running gap is more convenient for the insertion of the pole piece 20 than the running gap shown in Figures 1 to 8.

It is understandable that when a negative ion generator is provided at the air inlet, the adsorbent 17 at the dust suction port 14 is positively charged, and the dust in the accommodating chamber 18 is negatively charged. The induction coil 40 can generate a magnetic field from left to right in the accommodating chamber 18, so that the negatively charged dust will also move downward under the combined action of its own weight and the Lorentz force. The use of electromagnetic field dust removal further avoids the risk of dust splashing due to wind blowing and cutting, and dust rebounding back to the pole piece 20 after colliding with the inner wall of the accommodating chamber 18, reduces dust accumulation, and removes dust more thoroughly, further improving the dust removal effect and the protective effect on the laser 30 lens.

In another embodiment of the present invention, as shown in Figures 5 to 8, the solid arrows in Figures 6 and 8 point to the direction in which the blower blows air. The dust removal device also includes an electric field generator capable of generating an electric field in the front-to-back direction of Figure 5 or 7 in the accommodating chamber 18. Specifically, the electric field generator includes a first charged plate 50 with a positive charge and a second charged plate 60 with a negative charge; the first charged plate 50 is located at the air inlet 13, the ion generator at the air inlet 13 is a positive ion generator 16, and the second charged plate 60 is located at the dust suction port 14. Among them, since the adsorbent 17 at the dust suction port 14 is also negatively charged at this time, the second charged plate 60 and the adsorbent 17 can also be combined into one, and only one second charged plate 60 or adsorbent 17 can be set at the dust suction port 14. The first charged plate 50 can be a conductor. By connecting the conductor to the positive pole of a power source, or by grounding the conductor, a first charged plate 50 with a positive charge can be obtained. Similarly, by connecting the conductor to the negative pole of a power source, a second charged plate 60 with a negative charge can be obtained. The adsorbent 17 can also be obtained using the same method.

There will be an electric field from back to front along FIG. 5 or FIG. 7 between the first charged plate 50 and the second charged plate 60 or the adsorbent 17, so preferably, the air inlet 13 and the dust suction port 14 have the same height in the vertical direction. FIG. 5 exemplarily shows a circular air inlet 13 and a dust suction port 14, both of which have the same height in the vertical direction, and FIG. 7 exemplarily shows a strip-shaped air inlet 13 and a dust suction port 14, and the strip-shaped air inlet 13 and the dust suction port 14 have the same beneficial effects as the embodiments shown in FIG. 3 and FIG. 4 , which will not be repeated. The use of electric field dust removal further avoids the splashing of dust caused by wind blowing and cutting, and the risk of dust rebounding onto the pole piece 20 after colliding with the inner wall of the accommodating chamber 18, reduces dust accumulation, and removes dust more thoroughly, further improving the dust removal effect and the protective effect on the laser 30 lens.

Other structures and operations of the dust removal device according to the embodiment of the present invention are understandable and easy to implement for those skilled in the art, and thus will not be described in detail.

The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims (8)

1. A dust removal device for a pole piece, characterized in that the dust removal device comprises a housing, a blower fan and an ion generator, wherein a receiving cavity is provided in the housing, and the housing is provided with a tape running gap for the pole piece to pass through along the z-axis direction, a light inlet for introducing a cutting light beam into the receiving cavity along the x-axis direction, and an air inlet and a dust suction port respectively located on both sides of the y-axis direction; The blower fan is located at one side of the air inlet portion, and the ion generator is located in the blowing path of the blower fan; The dust removal device further comprises an electromagnetic field generator capable of generating a magnetic field in the accommodating cavity along the x-axis direction, wherein the magnetic field generates a downward Lorentz force on the charged dust in the blowing path of the blowing fan; The dust removal device also includes an electric field generator capable of generating an electric field along the y-axis direction in the accommodating cavity. 2. The pole piece dust removal device according to claim 1 is characterized in that the electromagnetic field generator comprises an induction coil and a power supply, and the magnetic field is generated after the induction coil is connected to the power supply. 3. The pole piece dust removal device according to claim 1 is characterized in that the lowest height of the dust suction port in the z-axis direction is lower than the lowest height of the air inlet part in the z-axis direction. 4. The pole piece dust removal device according to claim 1 is characterized in that the electric field generator includes a first charged plate and a second charged plate, the charge carried by the first charged plate is opposite to the charge carried by the second charged plate; the first charged plate is located at the air inlet, and the second charged plate is located at the dust suction port. 5. The pole piece dust removal device according to claim 1 is characterized in that the air inlet portion and the dust suction port are arranged opposite to each other, and the air inlet portion and the dust suction port have the same height in the y-axis direction. 6 . The pole piece dust removal device according to claim 1 , characterized in that the ion generator is a positive ion generator or a negative ion generator, and the ion generator is located in the air inlet. 7. The electrode dust removal device according to claim 6 is characterized in that the dust removal device also includes an adsorbent, which is located at the dust suction port, and the adsorbent carries an electric charge opposite to the electric charge carried by the ions generated by the ion generator. 8. The pole piece dust removal device according to claim 1, characterized in that the air inlet portion is an air inlet or an air knife; And/or the housing is further provided with a light outlet or a light absorbing member, and the light outlet or the light absorbing member corresponds to the light entrance.