CN116213402A - A pole piece dust-proof and dust-removing device - Google Patents

Abstract

The invention relates to a pole piece dustproof dust removing device, which comprises dust adhering papers arranged on two sides of a pole piece, a laminating device and a winding device, wherein the laminating device and the winding device are respectively arranged on the upstream and the downstream of a pole piece cutting station; the laminating device is abutted against the dust-binding paper and used for tightly adhering the dust-binding paper to the two sides of the pole piece; the winding device is connected to the dust-binding paper and used for driving the dust-binding paper and the pole piece to move and winding the dust-binding paper adhered to the two sides of the pole piece. The invention adopts active dust prevention, and the two sides of the pole piece are adhered with dust-binding paper before the pole piece is cut, so that dust generated during the pole piece cutting can not fall on the surface of the pole piece, a complex dust removing device is not required to be arranged, the complicated dust removing process is avoided, and new pollution can not be formed. The dust collecting device can remove the original dust on the pole piece, realize the cleaning of the pole piece, collect the flying dust generated in the cutting process and the dust in the environment, avoid the dust from adhering to the pole piece and realize the non-contact of the dust of the pole piece.

Description

A pole piece dust-proof and dust-removing device

technical field

The invention relates to the technical field of battery production, in particular to a pole piece dust-proof and dust-removing device.

Background technique

As one of the key materials of lithium batteries, lithium battery pole piece is mainly composed of current collector and coating. Usually, the current collector used in the positive electrode of lithium ion battery is aluminum foil, and the negative electrode is copper foil. The coating is made by mixing active material particles, conductive agent and binder. When producing pole pieces, the active material needs to be coated on the substrate first, and then dried and rolled into shape. The formed pole piece film must be die-cut or slitting (hereinafter referred to as cutting) before it can be used. Manufacturing of batteries.

The surface cleanliness of the pole piece is very important to the quality of the lithium battery. However, due to the cutting of the pole piece, a large amount of floating and highly adhesive dust will be generated. It will affect the capacity and charge and discharge efficiency of the battery, and in severe cases, it will cause the pole piece to puncture, and then cause the battery to short circuit.

In the cutting operation of lithium battery pole pieces, a corresponding pole piece dust removal device is usually equipped to remove the dust generated during cutting, so as to prevent dust from adhering to the pole piece and affecting the quality of the rolled pole piece .

The prior art discloses a pole piece dust removal device, which is formed with a dust removal channel for the pole piece to pass through, including an unwinding mechanism, a winding mechanism and a dust removal mechanism. The dedusting mechanism includes a plurality of dedusting supports arranged at intervals along the extending direction of the dedusting channel and a cleaning support located between two adjacent dedusting supports. The cleaning cloth belt can be held against the surface of the pole piece by the dust removal support, and as the cleaning cloth belt is transferred, the surface of the pole piece can be wiped and dedusted. At the same time, the negative pressure generated on the surface of the dust removal support can also suck away the dust that has been wiped off. Since a plurality of dust removal supports are provided, the pole piece will be wiped and dust removed many times during the process of passing through the dust removal channel. Moreover, when the cleaning cloth belt passes through the cleaning support, the negative pressure generated by the cleaning support can suck away the dust on the cleaning cloth belt, thereby cleaning the cleaning cloth belt, and also avoiding the residual dust on the cleaning cloth belt from abutting the pole piece. cause secondary pollution.

It has the following technical problems:

It adopts passive dust removal, that is, the dust generated during pole piece cutting has fallen on the surface of the pole piece before dust removal. It is necessary to set up a complicated dust removal device. The dust removal process is cumbersome and the effect is not good. Influenced by surface characteristics, roughness, relative wiping speed, and material and environmental humidity will all affect the wiping effect, and it is easy to damage the material to be cleaned or the cleaning cloth, forming new pollution.

Contents of the invention

In view of the problems existing in the prior art, the purpose of the present invention is to provide a dust-proof and dust-removing device for pole pieces, which does not require complex dust-removal devices and cumbersome dust-removal processes, does not form new pollution, and can obtain high surface cleanliness. pole piece.

In order to achieve the above object, the present invention adopts following technical scheme:

A pole piece dust-proof and dust-removing device, comprising dust sticky paper arranged on both sides of the pole piece, a bonding device upstream of the pole piece cutting station, and a winding device downstream respectively;

The pasting device abuts against the sticky paper, which is used to press and stick the sticky paper to both sides of the pole piece;

The winding device is connected to the sticky paper, and is used to drive the sticky paper and the pole piece to move and to wind up the sticky paper glued to both sides of the pole piece.

When working, first use the bonding device to press and bond the sticky paper to both sides of the pole piece. Since the winding device is connected to the sticky paper, the sticky paper can be used to drive the pole piece to move from the upstream of the pole piece cutting station to the pole piece cutting station through the rotation of the winding device. The pole piece is cut when arriving at the pole piece cutting station. Since the sticky paper is glued on both sides of the pole piece, the dust generated during the cutting process will not fall on the surface of the pole piece. After the cutting is completed, use the winding device to drive the cut sticky paper and the pole piece to move downstream of the pole piece cutting station, and then manually peel off the pole piece and the sticky paper to obtain the cut pole piece.

Further, the pasting device includes a pair of unwinding rollers and a pair of front pressing rollers, and a pair of unwinding rollers and a pair of front pressing rollers are symmetrically distributed on both sides of the pole piece. The unwinding rollers are used to place the sticky paper, The front pressing roller is arranged between the unwinding roller and the winding device, and is used for pressing and adhering the sticky paper to the surface of the pole piece.

Further, the bonding device also includes a pair of front tension rollers symmetrically distributed on both sides of the pole piece, and the front tension rollers are arranged between the unwinding roller and the front pressing roller.

Further, a static elimination device is provided at the place where the dust sticky paper is pressed and bonded to the surface of the pole piece.

Further, the winding device includes a pair of rear pressing rollers and a pair of winding rollers, and a pair of rear pressing rollers and a pair of winding rollers are symmetrically distributed on both sides of the pole piece, and the rear pressing rollers are arranged on the front pressing rollers. Between the take-up roller, it is used to draw the cut pole piece and the sticky paper, and the take-up roller is used to take up the cut sticky paper.

Further, the winding device also includes a pair of rear tension rollers symmetrically distributed on both sides of the pole piece, and the rear tension rollers are arranged between the rear pressing roller and the winding roller.

Further, the front pressing roller and the rear pressing roller are provided with a pressing force adjusting device, which is used to control the size of the pressing force.

Further, a dust collection plate is provided downstream of the rear pressing roller, and a dust collection sticky paper is provided on the dust collection board.

Further, the dust collecting plate is connected with an electrostatic generator.

Further, the sticky paper is sticky rolled paper with stickiness on both sides.

Generally speaking, the present invention has following advantages:

The invention adopts active dust-proof, sticking dust paper on both sides of the pole piece before cutting the pole piece, so that the dust generated during the cutting of the pole piece will not fall on the surface of the pole piece, and no complicated dust removal device is required to avoid The cumbersome dust removal process is eliminated. After the pole piece is cut, use the winding device to move the cut sticky paper and the pole piece to the downstream of the pole piece cutting station, and then peel off the pole piece and the sticky paper to obtain the surface cleanliness The high-cut pole piece does not need to be wiped to remove dust, and will not form new pollution.

Description of drawings

Fig. 1 is a schematic structural diagram of this embodiment.

Fig. 2 is a control schematic diagram of this embodiment.

In the picture:

1- Unwinding roller, 2- Sticky paper, 3- Front tension roller, 4- Front pressing roller, 5- Rear pressing roller, 6- Bracket, 7- Dust collecting plate, 8- Rewinding roller, 9- Electrostatic generator, 10-back tension roller, 11-frame, 12-ion bar, 13-pole piece, 14-pole piece cutting station.

Detailed ways

Traditional dust removal methods for new energy lithium battery pole pieces 13 include brush dust removal, combined blowing and suction dust removal, and ultrasonic dust removal. The efficiency of brush dust removal is low, because some dust particle size is very small, it is difficult for the brush to brush, and at the same time, the brush has the risk of damaging the film of the pole piece 13. The hardness and density of the brush are different from the pole piece 13 Parameters such as the distance of the film are difficult to control. The dust removal method combined with blowing and suction blows the dust particles away from the surface of the pole piece 13 through high-speed airflow, and then completes the collection of dust particles through the negative pressure suction system. This method has a better dust removal effect on large-size dust particles , but for smaller particle size dust particles, because of the boundary layer effect, the dust removal effect is not ideal. At present, ultrasonic dust removal is mainly through the joint action of high-speed airflow and ultrasonic waves on the surface of the pole piece 13 to achieve the purpose of separating the dust particles from the surface of the pole piece 13, and then the dust is absorbed by the negative pressure dust suction system. The ultrasonic wave of this dust removal method is mainly generated by the self-excited oscillation of the cavity when the high-speed airflow passes through the channel with variable cross-section. It is said to be very small, so the dust removal efficiency needs to be verified.

Aiming at the problem that the existing pole piece 13 adopts passive dust removal and the dust removal efficiency of the dust removal device is low, the present invention proposes a dust-proof and dust-removal method and a specific implementation device in the cutting process of the pole piece 13, and improves the overall production of the pole piece 13 with an active dust removal method. quality.

The present invention will be described in further detail below.

As shown in FIG. 1 , a pole piece dust-proof and dust-removing device includes a bonding device, a winding device and a dust collecting device arranged on a frame 11 . The bonding device and the winding device are respectively located upstream and downstream of the lithium battery pole piece cutting station 14 . The dust collecting device is located between the winding device and the pole piece 13 of the lithium battery.

The bonding device includes a pair of unwinding rollers 1 , a pair of front tension rollers 3 and a pair of front pressing rollers 4 . A pair of unwinding rollers 1 are respectively installed on the upper and lower sides of the pole piece 13 for placing the sticky paper 2, and the sticky paper 2 is preferably double-sided sticky roll paper.

A pair of front pressing rollers 4 are symmetrically distributed on the upper and lower sides of the pole piece 13, and a pressing space is formed between the upper and lower front pressing rollers 4 for pressing the sticky paper 2 to the surface of the pole piece 13. At the same time, the two front pressing rollers Roller 4 can also play the effect of traction sticky paper 2.

The front tension roller 3 which controls the tension of the sticky paper 2 is located between the unwinding roll 1 and the front pressing roll 4, and a static elimination device is provided in front of the bonding point between the pole piece 13 and the sticky paper 2. In the present embodiment, the static elimination device is an ion rod 12, and the ion rod 12 (static elimination rod) can generate a large amount of positively and negatively charged air masses, which can neutralize the charges carried by the objects passing through its ion radiation area. . When the surface of the object is negatively charged, it will attract the positive charge in the radiation area, and when the surface of the object is positively charged, it will attract the negative charge in the radiation area, so that the static electricity on the surface of the object is neutralized , to achieve the purpose of eliminating static electricity, after the dust sticky paper 2 is bonded to the pole piece 13, the dust sticky paper 2 is easier to stick away the dust originally attached to the pole piece 13, which is beneficial to obtain a cleaner pole piece 13.

After the pole piece 13 is pasted with the adhesive paper, it enters the pole piece cutting station 14 between the front pressing roller 4 and the rear pressing roller 5 for cutting. After cutting, the dust sticky paper 2 is drawn into by the winding device Winding stage.

The winding device includes a pair of rear pressing rollers 5 , a pair of winding rollers 8 and a pair of rear tension rollers 10 . A pair of pressing rollers are respectively located on the upper and lower sides of the pole piece 13, and the pole piece 13 and the dust sticky paper 2 after being slit by traction, the winding roller 8 is located behind the rear pressing roller 5, and the rear tension roller 10 is located behind the rear pressing roller 5 and winding roller 8 between.

The front pressing roller 4 and the rear pressing roller 5 are driven by the first motor arranged on the frame 11, the first motor is placed on one side of the front pressing roller 4 and the rear pressing roller 5, and the front pressing is completed through the chain The power transmission of the joining roller 4 and the rear pressing roller 5.

There is a certain gap between the two front pressing rollers 4 and the two rear pressing rollers 5 for the passage of the pole piece 13 and the dust sticky paper 2. The size of the gap can be adjusted by the pressing force adjusting device to control the pressing force the size of. In this embodiment, the pressing force adjusting device is an air cylinder. The front pressing roller 4 and the rear pressing roller 5 also play the role of pulling the sticky paper 2, and the pole pieces 13 move together with the sticky paper 2 because they are closely bonded to the sticky paper 2.

The front pressing roller 4, the rear pressing roller 5, the unwinding roller 1 and the winding roller 8 can rotate synchronously.

The unwinding roller 1 is a follower roller, which is driven by the sticky paper 2 to rotate, and the winding roll 8 is driven by a second motor arranged on the frame 11 to realize recycling of the sticky paper 2 .

The dust collection device is located between the winding device and the pole piece 13. The dust collection device includes a bracket 6, a dust collection plate 7 and an electrostatic generator 9. The upper and lower sides of the pole piece 13 are respectively provided with a dust collection plate 7 and a dust collection plate 7. It is located downstream of the rear pressing roller 5, and its upper and lower surfaces are pasted with dust-collecting sticky paper. At the same time, the dust-collecting plate 7 is connected to the electrostatic generator 9, which can generate static electricity, and the dust that shakes off during the paper delivery process is collected by electrostatic adsorption. The dust is collected to prevent the dust from adhering to the pole piece 13 again, and at the same time actively absorbs the dust in the air around the pole piece 13 to prevent the dust from adhering to the pole piece 13 and causing pollution. The integrated board is fixed by the bracket 6, and can continue to be used by replacing the double-sided sticky paper 2 on the surface after being used for a period of time.

As shown in Figure 2, the start and stop of the first motor, the second motor, the cylinder, the ion bar 12 and the electrostatic generator 9 are controlled by PLC.

working principle:

Laminating device, winding device and dust collecting device are respectively installed before and after pole sheet cutting station 14, and the size and installation position of each part can be adjusted according to the size of the existing slitting machine. After installing each device, place the roll-shaped sticky paper 2 on the unwinding roller 1, pull the sticky paper 2 to the pole piece 13 and stick it together with the pole piece 13, then the pole piece 13 and the sticky paper 2 Pass through the front pressing roller 4, the pole piece cutting station 14, and the rear pressing roller 5 together to reach the winding part. When winding, the pole piece 13 and the sticky paper 2 are manually peeled off, and the sticky paper 2 is pulled to the winding part. Roller 8, just can start slitting machine and this device and start normal work after adjusting the speed of each pressing roller, 8 speeds of winding roller and each tension roller parameter. When the sticky paper 2 on the unwinding roller 1 is almost used up, replace a new roll of sticky paper 2, and glue the head and end of the old and new sticky paper 2 together. The dust paper 2 is cut, and the dust paper 2 on the winding roller 8 is recovered, and then the dust paper 2 at the winding device is pulled to the winding roller 8 again, and the replacement and recovery of the dust paper 2 are completed. The dust collecting plate 7 is replaced regularly, and the sticky dust paper 2 on the surface can be continued to be used after the dust collecting plate 7 is taken out from the support frame.

In this embodiment, the sticky paper 2 is sticky roll paper with stickiness on both sides. It is a flexible film with stickiness on both sides. The base material is one of PP and PE materials. At least one of resin, butyl rubber, phenolic resin, acrylic resin, vinyl acetate resin, shellac, carboxymethyl cellulose and vinyl alcohol, the sticky paper 2 has a thickness of 0.5-2mm, and its surface adhesion The size should be such that it will not cause damage to the pole piece 13 itself, and will not affect the unwinding and performance of the sticky paper 2 itself. The sticky paper 2 can be recycled after use.

The double-sided dust sticky paper 2 can not only remove the original dust on the pole piece 13 film, realize the cleaning of the pole piece 13, but also collect the floating dust generated in the cutting process and the dust in the environment, so as to avoid these dusts from adhering to the On the pole piece 13, the dust-free pole piece 13 is realized.

The dust collecting plate 7 can prevent the dust from falling on the surface of the pole piece 13 due to movement or shaking during the winding process of the double-sided dust-sticky paper 2, and can collect the dust floating in the environment during the winding process to avoid the dust of the pole piece 13. Secondary pollution can be quickly cleaned by replacing the sticky paper 2, which is convenient and quick.

The present invention is not only applicable to the cutting process production line of the lithium battery pole pieces 13, but also applicable to the production lines of various thin film products requiring cleanliness.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (10)

1. A pole piece dust-proof and dust-removing device, characterized in that: it comprises dust sticky paper arranged on both sides of the pole piece, and a laminating device and a downstream winding device respectively arranged at the upstream of the pole piece cutting station; The pasting device abuts against the sticky paper, which is used to press and stick the sticky paper to both sides of the pole piece; The winding device is connected to the sticky paper, and is used to drive the sticky paper and the pole piece to move and to wind up the sticky paper glued to both sides of the pole piece. 2. A pole piece dust-proof and dust-removing device according to claim 1, characterized in that: the bonding device includes a pair of unwinding rollers and a pair of front pressing rollers, a pair of unwinding rollers and a pair of front pressing rollers The rollers are distributed symmetrically on both sides of the pole piece. The unwinding roller is used to place the sticky paper, and the front pressing roller is set between the unwinding roller and the winding device to press and bond the sticky paper to the surface of the pole piece. 3. A pole piece dustproof and dedusting device according to claim 2, characterized in that: the laminating device also includes a pair of front tension rollers symmetrically distributed on both sides of the pole piece, and the front tension rollers are arranged between the unwinding roller and the pole piece. Between the front pressing rollers. 4. A pole piece dust-proof and dust-removing device according to claim 1, characterized in that: a static elimination device is provided at the place where the sticky paper is pressed and bonded to the surface of the pole piece. 5. A pole piece dust-proof and dedusting device according to claim 3, characterized in that: the winding device includes a pair of rear pressing rollers and a pair of winding rollers, a pair of rear pressing rollers and a pair of winding rollers The rollers are symmetrically distributed on both sides of the pole piece, and the rear pressing roller is set between the front pressing roller and the winding roller, which is used to pull the cut pole piece and sticky paper, and the winding roller is used for winding and cutting After the sticky paper. 6. A pole piece dust-proof and dedusting device according to claim 5, characterized in that: the winding device also includes a pair of rear tension rollers symmetrically distributed on both sides of the pole piece, and the rear tension rollers are arranged on the rear pressing roller and between the winding rollers. 7. A pole piece dustproof and dedusting device according to claim 6, characterized in that: the front pressing roller and the rear pressing roller are provided with a pressing force adjusting device for controlling the size of the pressing force. 8. A pole piece dust-proof and dust-removing device according to claim 6, characterized in that: a dust-collecting plate is provided downstream of the rear pressing roller, and a dust-collecting sticky paper is provided on the dust-collecting plate. 9. A pole piece dust-proof and dust-removing device according to claim 8, characterized in that: the dust-collecting plate is connected with an electrostatic generator. 10. The pole piece dustproof and dedusting device according to claim 1, characterized in that the sticky paper is sticky roll paper with stickiness on both sides.

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