CN117019772B - Dust removal mechanism, pole piece dust removal device and battery production system - Google Patents

Abstract

The application relates to a dust removing mechanism, a pole piece dust removing device and a battery production system, in the dust removing process, particles on a pole piece are continuously adhered by utilizing the rotation of a dust adhering roller around the axis of the dust adhering roller, so that the dust removing operation on the surface of the pole piece is completed. The separator can separate particles from the dust-binding roller, so that the particles adhered to the dust-binding roller are separated by the separator at the same time of dust binding; and the separated particles are sucked and recovered by the dust collecting assembly. Therefore, the probability that particles adhered to the dust-binding roller are contacted with the pole piece again is effectively reduced, and the risk of secondary pollution of the pole piece is reduced. Meanwhile, the positions of the dust-sticking rollers, which are separated from the particles, recover the adhesion capability, so that the dust-sticking rollers can continuously and stably carry out dust removal operation. In addition, the dust collection assembly can utilize the suction capacity to directly suck dust to the pole piece when in operation, and thus, the dust collection assembly is matched with the dust adhering roller to form two different dust collection modes, the dust collection effect of the pole piece is enhanced, and the dust collection efficiency is improved.

Description

Dust removal mechanism, pole piece dust removal device and battery production system

Technical Field

The application relates to the technical field of battery production, in particular to a dust removing mechanism, a pole piece dust removing device and a battery production system.

Background

In the pole piece processing process, the working procedures of coating, baking, cold pressing and the like are generally required, and the surface of the pole piece is generally dedusted before cold pressing so as to prevent particles on the surface of the pole piece from damaging the pole piece during cold pressing. However, the dust collector is limited by the structural design of the traditional dust collector, so that secondary pollution is easy to cause in the dust collection process, and the dust collection efficiency is low.

Disclosure of Invention

Based on the above, it is necessary to provide a dust removing mechanism, a pole piece dust removing device and a battery production system, so that the risk of secondary pollution is reduced, and the dust removing efficiency is improved.

In a first aspect, the present application provides a dust removal mechanism, the dust removal mechanism comprising: a dust-sticking roller configured to be rotatable about its own axis to adhere particles on the pole piece; a separator at least for separating particles adhered to the dust-sticking roller from the dust-sticking roller; the dust collecting assembly is used for sucking the separated particles.

According to the dust removing mechanism, the dust adhering roller rotates around the axis of the dust adhering roller to continuously adhere particles on the pole piece, so that the dust removing operation on the surface of the pole piece is completed. The separator can separate particles from the dust-binding roller, so that the particles adhered to the dust-binding roller are separated by the separator at the same time of dust binding; and the separated particles are sucked and recovered by the dust collecting assembly. Therefore, the probability that particles adhered to the dust-binding roller are contacted with the pole piece again is effectively reduced, and the risk of secondary pollution of the pole piece is reduced. Meanwhile, the positions of the dust-sticking rollers, which are separated from the particles, recover the adhesion capability, so that the dust-sticking rollers can continuously and stably carry out dust removal operation. In addition, the dust collection assembly can utilize the suction capacity to directly suck dust to the pole piece when in operation, and thus, the dust collection assembly is matched with the dust adhering roller to form two different dust collection modes, the dust collection effect of the pole piece is enhanced, and the dust collection efficiency is improved.

In some embodiments, the dust collection assembly comprises an aspirator and a dust collection member, the dust collection member has a dust collection chamber and an opening in communication with the dust collection chamber, the dust-binding roller is rotatably connected to a chamber wall of the dust collection chamber and acts on the pole piece through the opening, and the aspirator is used for aspirating the interior of the dust collection chamber. Thus, the dust collecting piece is introduced, and the dust adhering roller is rotationally connected in the dust collecting piece, so that particles separated from the dust adhering roller can be sucked and recovered conveniently; meanwhile, the suction dust removal is conveniently realized on the polar plate by using the opening, and the dust removal effect is enhanced.

In some embodiments, the dust collection member further has a transfer passage through which the aspirator communicates with the dust collection chamber. Therefore, a transmission channel is arranged at one end of the dust collection cavity, so that the aspirator can conveniently suck the dust collection cavity; meanwhile, the particles in the dust collection cavity are conveniently sucked and recovered uniformly by utilizing the transmission channel.

In some embodiments, the inner wall of the transfer channel includes a receiving portion on one side of the opening for receiving a portion of the particles released from the dust-binding roller. By the design, the material receiving part is arranged at one side of the opening, so that the risk of falling off the electrode plate can be reduced, and the risk of secondary pollution is reduced; meanwhile, the dust removal efficiency is improved.

In some embodiments, the dust collection assembly further comprises a flow guide member having a flow guide passage with one end in communication with the dust collection chamber and the other end in communication with the aspirator. Therefore, the guide piece is introduced between the aspirator and the dust collecting piece, so that the assembly between the aspirator and the dust collecting piece is convenient; but also is convenient for sucking out the particles in the dust collecting cavity, so that the particles are stably discharged.

In some embodiments, the cross-sectional area of the flow-directing channel increases and decreases from an end of the flow-directing channel near the dust collection chamber to an end of the flow-directing channel away from the dust collection chamber. Therefore, the cross-sectional area of the diversion channel is reasonably designed, so that the negative pressure in the dust collection cavity can be maintained, and the suction force on particles is improved; the impact of particles on the diversion channel can be slowed down, so that the air flow stably flows, and the dust removal effect is improved; in addition, through reasonable design channel structure, also can be through increasing flow resistance for the wind-force of opening part is more even, reduces the probability at dust removal dead angle.

In some embodiments, the separator is configured as an air knife assembly for blowing air against the dust-binding roller to drive the dust-binding roller to rotate about its own axis and to dislodge particles from the dust-binding roller. Therefore, the separator is designed as an air knife assembly, particles are separated from the dust-binding roller by utilizing the blowing force, and the particles are convenient to suck and recycle; meanwhile, particles on the pole piece are conveniently blown up, a plurality of different dust removing modes are formed, and the dust removing effect is further improved.

In some embodiments, the air outlet of the air knife assembly is disposed toward a portion of the dust-binding roller away from the pole piece and toward a side of the dust collection assembly. By means of the design, the direction of the air knife assembly is reasonably controlled, particles are conveniently blown off, the particles can better enter the dust collecting assembly, and the dust removing effect is improved.

In some embodiments, the dust-binding roller comprises a rotating shaft and a dust-binding part protruding on the rotating shaft, and the dust-binding part extends along the axis of the dust-binding roller and is used for contacting with the pole piece. Therefore, the dust-sticking roller is provided with the rotating shaft and the dust-sticking part, so that the dust-sticking roller can be stably installed through the rotating shaft, and particles can be stably adhered through the dust-sticking part.

In some embodiments, the dust-binding portion includes at least two, all of the dust-binding portions are disposed around the outer circumference of the axis, and each of the dust-binding portions is inclined or curved along the same rotational direction of the dust-binding roller. Therefore, each dust-binding part is inclined or bent towards the same rotation direction, so that the air knife assembly is convenient for driving the dust-binding roller to rotate stably, and the dust removal operation is enabled to run stably.

In some embodiments, the dust removing mechanism further comprises a one-way bearing arranged on the dust adhering roller to control the dust adhering roller to rotate unidirectionally around the self axis. Thus, through the one-way bearing, the dust-binding roller rotates in one direction, so that the dust-binding roller cannot rotate reversely due to misoperation, and particle accumulation on the dust-binding roller due to reversion is reduced.

In a second aspect, the present application provides a pole piece dust collector, the pole piece dust collector comprising: the conveying mechanism is used for conveying the pole pieces; the dust removing mechanism as set forth in any one of the above, wherein the dust-sticking roller is in contact with the pole piece on the conveying mechanism.

The pole piece dust removing device adopts the dust removing mechanism, so that the probability that particles adhered to the dust adhering roller are contacted with the pole piece again can be effectively reduced, and the risk of secondary pollution to the pole piece is reduced. Meanwhile, the positions of the dust-sticking rollers, which are separated from the particles, recover the adhesion capability, so that the dust-sticking rollers can continuously and stably carry out dust removal operation. In addition, the dust collection assembly can utilize the suction capacity to directly suck dust to the pole piece when in operation, and thus, the dust collection assembly is matched with the dust adhering roller to form two different dust collection modes, the dust collection effect of the pole piece is enhanced, and the dust collection efficiency is improved.

In some embodiments, the conveying mechanism comprises a conveying roller for winding the pole piece, and the dust adhering roller is arranged on the conveying roller at a position for supporting the pole piece. Therefore, the dust-sticking roller is arranged at the top of the transmission roller, so that the shaking of the pole piece in the dust removal process can be effectively reduced, the abnormal phenomena of pole piece lug folding, deflection and the like in the processing process are effectively reduced, and the processing quality of the pole piece is improved.

In some embodiments, the dust removing mechanism comprises at least two dust removing mechanisms, and in all the dust removing mechanisms, the two dust removing mechanisms are respectively positioned on two opposite sides of the pole piece along the thickness direction of the pole piece. Therefore, at least one dust removing mechanism is distributed on the two opposite sides of the pole piece along the thickness direction of the pole piece, so that the upper side surface and the lower side surface of the pole piece can be effectively removed with dust, and the processing quality of the pole piece is improved.

In a third aspect, the present application provides a battery production system comprising the pole piece dust removal device of any one of the above.

Drawings

Fig. 1 is a schematic structural diagram of a pole piece dust removing device according to some embodiments of the present application.

Fig. 2 is a cross-sectional view of the pole piece dust removing device in fig. 1.

Fig. 3 is a cross-sectional view of a dust removing mechanism according to some embodiments of the present application.

Fig. 4 is a schematic view of a dust-binding roller according to some embodiments of the present application.

Fig. 5 is a schematic structural diagram of a pole piece dust removing device according to other embodiments of the present application.

100. A pole piece dust removing device; 10. a dust removing mechanism; 1. a dust adhering roller; 11. a rotating shaft; 12. a dust adhering part; 121. a windward side; 122. a dust-sticking surface; 13. an axis; 2. a dust collection assembly; 21. a dust collection member; 211. a dust collection chamber; 212. an opening; 213. a transmission channel; 214. a receiving part; 22. a flow guide; 221. a diversion channel; 3. a separator; 31. an air knife assembly; 311. an air outlet; 4. a bracket; 20. a conveying mechanism; 201. a conveying roller; 200. pole pieces.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

In the previous process of battery production, the electrode plate needs to be processed, for example: coating, baking, cold pressing, etc. Before cold pressing, the surface of the pole piece is generally dedusted, so that the content of metal particles in the pole piece can be reduced; and the pressure loss of particles to the pole piece in the cold pressing process can be reduced, and the quality of the pole piece is improved.

In the traditional dust collector, the particles on the pole piece are adhered by using the dust-sticking roller, so that the dust removing effect is achieved. However, as the dust-sticking roller rotates, the position where the particles adhere will come into contact with the pole piece again. As this location is covered by particles, its adhesion becomes weaker and the dust removal effect is reduced. Meanwhile, when the position is contacted with the pole piece again, adhered particles are easily extruded and drop on the pole piece again, so that secondary pollution is caused to the pole piece, and the dust removal efficiency is reduced.

Based on this, in order to solve the pole piece dust removal in-process and easily cause secondary pollution, and the low problem of dust removal efficiency, the application has designed a dust removal mechanism, utilizes the rotation of dust bonding roller around self axis, the granule on the continuous adhesion pole piece to accomplish the dust removal operation to the pole piece surface. The separator can separate particles from the dust-binding roller, so that the particles adhered to the dust-binding roller are separated by the separator at the same time of dust binding; and the separated particles are sucked and recovered by the dust collecting assembly. Therefore, the probability that particles adhered to the dust-binding roller are contacted with the pole piece again is effectively reduced, and the risk of secondary pollution of the pole piece is reduced. Meanwhile, the positions of the dust-sticking rollers, which are separated from the particles, recover the adhesion capability, so that the dust-sticking rollers can continuously and stably carry out dust removal operation. In addition, the dust collection assembly can utilize the suction capacity to directly suck dust to the pole piece when in operation, and thus, the dust collection assembly is matched with the dust adhering roller to form two different dust collection modes, the dust collection effect of the pole piece is enhanced, and the dust collection efficiency is improved.

The electrode sheet refers to a structure capable of forming an electrochemical reaction component in a battery, and may include a current collector and an active material coated on the current collector. The active material may be selected differently depending on the polarity of the pole piece, for example: such as: the active material on the positive electrode sheet may be, but is not limited to, lithium cobaltate, lithium manganate, lithium nickelate, lithium iron phosphate, ternary material, etc. The active material on the negative electrode sheet may be, but is not limited to, graphite, lithium titanate, silicon oxide, and the like.

Referring to fig. 1 and 2, according to some embodiments of the present application, a dust removing mechanism 10 is provided, where the dust removing mechanism 10 includes: a dust-binding roller 1, a separator 3 and a dust-collecting assembly 2. The dust-binding roller 1 is configured to be rotatable about its own axis 13 to adhere particles on the pole piece 200. The separator 3 is at least used for separating particles adhered on the dust-binding roller 1 from the dust-binding roller 1; the dust-sticking roller 1 is at least partially located in the dust collection assembly 2, and the dust collection assembly 2 is used for sucking the detached particles.

The dust-sticking roller 1 is a structure which has certain adhesive capability and can adhere to particles on the pole piece 200, and the material can be selected from, but not limited to, silica gel, butyl gel and the like. The dust-binding roller 1 can rotate in various ways in dust binding, for example: the motor drives the rotation; or, the wind power is utilized to blow and rotate; or, the pole piece 200 is driven to passively rotate.

The separator 3 is a structure capable of separating particles on the dust-sticking roller 1, and in the dust removal process, the position of the dust-sticking roller 1 to which the particles are stuck is gradually separated from the pole piece 200 along with the rotation of the dust-sticking roller 1. The adhering particles are now detached by the separator 3 so that the adhesion is restored in this position.

The manner in which the separator 3 breaks away from the particles can be of various designs, such as: the separator 3 blows off particles from the dust-binding roller 1; alternatively, the separator 3 is designed as a scraper structure, scraping off particles from the dust-binding roller 1, etc.

The dust collection assembly 2 refers to a device capable of absorbing particles detached from the dust-sticking roller 1, and may be, but is not limited to, a vacuum pump, a combination of a vacuum pump and a cover structure, or the like. The dust collection assembly 2 provides suction force for particles and also forms negative pressure on the surface of the pole piece 200, so that part of particles on the pole piece 200 are sucked, and preliminary dust removal is realized.

Thus, the probability that the particles adhered to the dust-binding roller 1 are contacted with the pole piece 200 again is effectively reduced, and the risk of secondary pollution of the pole piece 200 is reduced. Meanwhile, the positions of the dust-sticking roller 1, which are separated from the particles, restore the adhesion capability, so that the dust-sticking roller 1 can continuously and stably carry out dust removal operation. In addition, the dust collection assembly 2 can utilize the suction capacity to directly suck dust to the pole piece 200 during operation, and thus, the dust collection assembly is matched with the dust adhering roller 1 to form two different dust collection modes, the dust collection effect of the pole piece 200 is enhanced, and the dust collection efficiency is improved.

Optionally, referring to fig. 2, the dust collection assembly 2 includes an aspirator (not shown) and a dust collection member 21 according to some embodiments of the present application. The dust collecting member 21 has a dust collecting chamber 211 and an opening 212 communicating with the dust collecting chamber 211, the dust adhering roller 1 is rotatably connected to a chamber wall of the dust collecting chamber 211 and acts on the pole piece 200 through the opening 212, and the aspirator is used for sucking the inside of the dust collecting chamber 211.

The dust collection member 21 refers to a structure having a space therein, which may be designed as, but not limited to, a hood structure, a tubular structure, etc.

An aspirator refers to a device that provides suction power within the dust collection cavity 211, which may be, but is not limited to, a vacuum pump. During the dust removal process, the aspirator is activated to aspirate the dust collection chamber 211 so that a negative pressure environment is formed at the opening 212. At this time, part of particles on the pole piece 200 are sucked into the dust collection cavity 211 through the opening 212 and then are sucked by the aspirator, so that the first dust removal is realized. Since the dust-sticking roller 1 can act on the pole piece 200 through the opening 212, the dust-sticking roller 1 sticks to the particles on the pole piece 200 in a rotating manner, so that the second dust removal is realized; after the adhesion, the particles are separated by the separator 3 and fall into the dust collection chamber 211. Finally, the particles falling into the dust collection chamber 211 are sucked away by the aspirator.

The dust-binding roller 1 acts on the pole piece 200 through the opening 212 in various ways, such as: at least part of the dust-binding roller 1 protrudes out of the opening 212 and contacts the pole piece 200; alternatively, the surface of the pole piece 200 protrudes into the dust collection chamber 211 through the opening 212 and contacts the dust-sticking roller 1.

To facilitate better action of the dust roller 1 on the pole piece 200, the dust collecting member 21 may be mounted in an adjustable connection, such as: the dust removing mechanism 10 further includes a bracket 4, and the dust collecting member 21 is adjustably mounted on the bracket 4 such that the dust adhering roller 1 is brought into contact with the surface of the pole piece 200 by adjusting the position, such as the rotation angle, the height position, etc., of the dust collecting member 21. Wherein the adjustable connection may be, but is not limited to, a bolted connection, a pinned connection, a snap connection, etc. Of course, the separator 3, such as the air knife assembly 31, may also be mounted on the support 4.

Thus, the dust collecting member 21 is introduced, and the dust-sticking roller 1 is rotatably connected in the dust collecting member 21, so that the particles separated from the dust-sticking roller 1 can be sucked and recovered; meanwhile, the opening 212 is also convenient for realizing suction dust removal on the polar plate 200, and the dust removal effect is enhanced.

Optionally, referring to fig. 2, according to some embodiments of the present application, the dust collecting member 21 further has a transfer channel 213, and the aspirator is in communication with the dust collecting chamber 211 through the transfer channel 213.

The transfer channel 213 is a structure that provides a channel for the aspirator to communicate with the dust collection chamber 211, and when the aspirator is operated, the dust collection chamber 211 is sucked through the transfer channel 213, so that particles in the dust collection chamber 211 are sucked into the transfer channel 213 and then are sucked out by the transfer channel 213.

Thus, a transmission channel 213 is arranged at one end of the dust collection cavity 211, so that the aspirator can conveniently suck the dust collection cavity 211; at the same time, the use of the transfer passage 213 also facilitates uniform suction recovery of particles in the dust collection chamber 211.

Optionally, referring to fig. 3, according to some embodiments of the present application, an inner wall of the conveying channel 213 includes a receiving portion 214 located at one side of the opening 212, where the receiving portion 214 is configured to receive a portion of the particles detached from the dust-binding roller 1.

The receiving portion 214 is an inner wall of the conveying channel 213, and the inner wall is disposed near the opening 212. When the separator 3 breaks away particles from the dust-binding roller 1, at least part of the particles will fall directly onto the receiving portion 214. Especially when the separator 3 is of a blowing structure, the particles are blown off the dust-binding roller 1 and drop on the receiving part 214 in a parabolic manner.

When the dust removing mechanism 10 is assembled on the pole piece 200, the material receiving part 214 can be close to the pole piece 200 as much as possible, so that the gap between the dust collecting piece 21 and the pole piece 200 can be reduced, and the separated particles can be reduced from falling onto the pole piece 200 again from the gap; at the same time, it is also convenient to drop more particles onto the receiving portion 214.

By the design, the material receiving part 214 is arranged on one side of the opening 212, so that the risk of falling off the electrode plate 200 can be reduced, and the risk of secondary pollution can be reduced; meanwhile, the dust removal efficiency is improved.

Optionally, referring to fig. 2, the dust collection assembly 2 further includes a deflector 22 having a deflector channel 221 according to some embodiments of the present application. One end of the guide channel 221 is communicated with the dust collection cavity 211, and the other end is connected with the aspirator.

The flow guide 22 is a structure for guiding particles sucked from the flow guide channel 221, and after the particles are separated from the dust-sticking roller 1, the particles sequentially flow through the dust collection chamber 211 and the flow guide channel 221 under the action of negative pressure suction. In particular, in some embodiments, one end of the diversion channel 221 is communicated with the dust collecting cavity 211 through the transmission channel 213, and at this time, the particles sequentially flow through the dust collecting cavity 211, the transmission channel 213 and the diversion channel 221.

In addition, in order to facilitate the dust collection assembly 2 to be more compatible with the processing of the pole piece 200, the end of the flow guiding member 22 away from the dust collection cavity may be curved.

Alternatively, the air guiding member 22 and the dust collecting member 21 may be connected by, but not limited to, bolts, clamping, riveting, welding, etc. Of course, the flow guiding member 22 and the dust collecting member 21 may be integrally formed, for example: the flow guiding member 22 and the dust collecting member 21 are formed by die casting, injection molding, 3D printing, and the like.

Thus, the guide piece 22 is introduced between the aspirator and the dust collecting piece 21, so that the assembly between the aspirator and the dust collecting piece 21 is convenient; but also facilitates suction of particles in the dust collection chamber 211 so that the particles are stably discharged.

Optionally, referring to fig. 3, the cross-sectional area of the flow guiding channel 221 is gradually increased and then gradually decreased from an end of the flow guiding channel 221 near the dust collecting cavity 211 to an end of the flow guiding channel 221 away from the dust collecting cavity 211.

The cross-sectional area of the flow channel 221 gradually increases and then gradually decreases as the airflow flows, which means that the flow channel 221 has smaller ends and relatively larger middle. The smaller design of the one end of the diversion channel 221 can keep the airflow velocity at the place to be constant, so as to be convenient for maintaining the negative pressure in the dust collection cavity 211 and improving the suction force. The relatively large design in the middle can slow down the flow rate entering the diversion channel 221, reduce the impact force of particles on the diversion channel 221, and enable the air flow carrying the particles to smoothly flow in the diversion channel 221.

For ease of understanding the cross-section of the flow channel 221, the cross-section of the flow channel 221 may be the cross-section denoted by S in fig. 3, as illustrated in fig. 3.

Thus, the cross-sectional area of the diversion channel 221 is reasonably designed, so that the negative pressure in the dust collection cavity 211 can be maintained, and the suction force on particles is improved; but also can slow down the impact of particles on the diversion channel 221, so that the air flow stably flows, thereby being beneficial to improving the dust removal effect; in addition, through reasonable design channel structure, also can be through increasing flow resistance for the wind-force of opening 212 department is more even, reduces the probability that appears removing dust dead angle.

Optionally, referring to fig. 2, according to some embodiments of the present application, the separator 3 is configured as an air knife assembly 31, the air knife assembly 31 being configured to blow air against the dust-binding roller 1 to drive the dust-binding roller 1 to rotate about its own axis 13 and to detach particles from the dust-binding roller 1.

The air knife assembly 31 refers to a device capable of blowing air to the dust-sticking roller 1, such as: which may be, but is not limited to, a blower, a combination of a blower and an air guiding structure, etc.

When the air knife assembly 31 separates particles, the dust-binding roller 1 is driven to rotate around the axis 13 of the air knife assembly, so that the dust-binding roller 1 circumferentially adheres to the particles on the pole piece 200. It should be noted that, the air knife assembly 31 drives the dust-binding roller 1 to actively rotate, so that the dust-binding roller can have relative motion with respect to the pole piece 200, thereby playing a role in actively wiping and strengthening the dust removal effect.

The direction of the linear velocity of the dust-sticking roller 1 at the contact position with the pole piece 200 may be opposite to or the same as the conveying direction of the pole piece 200. When the two directions are the same, the air knife assembly 31 can drive the linear speed of the dust-binding roller 1 to be larger than the conveying speed of the pole piece 200, so that the generated relative movement can cause wiping action and the dust removal effect is improved.

When the air knife assembly 31 blows air to the dust-binding roller 1, at least a part of blown air acts on the pole piece 200 because the dust-binding roller 1 acts on the pole piece 200, and the original part of particles or the part of particles falling off on the pole piece 200 can be blown up to be adhered to the dust-binding roller 1 again or directly enter the dust collecting assembly 2. Thus, different three dust removal designs can be formed by matching the dust collection assembly 2 and the dust binding roller 1.

In addition, referring to fig. 2, when the dust collecting member 21 has a conveying channel 213 communicating with the dust collecting cavity 211, the conveying channel 213 and the air knife assembly 31 may be located on opposite sides of the dust collecting roller 1, so that particles blown by the air knife assembly 31 can better enter the conveying channel 213, for example: the blown off particles may better fall onto the receiving portion 214 in the transfer channel 213.

In this way, the separator 3 is designed as the air knife assembly 31, and particles are separated from the dust-binding roller 1 by utilizing the blowing force, so that the particles are convenient to suck and recycle; meanwhile, particles on the pole piece 200 are conveniently blown up, a plurality of different dust removing modes are formed, and the dust removing effect is further improved.

According to some embodiments of the present application, optionally, the air outlet 311 of the air knife assembly 31 is disposed toward a portion of the dust-binding roller 1 away from the pole piece 200 and toward the side of the dust collection assembly 2.

The air outlet 311 of the air knife assembly 31 is arranged towards a part of the dust-binding roller 1 away from the pole piece 200, so that most of air is concentrated on the upper surface of the dust-binding roller 1, and the dust-binding roller 1 is conveniently driven to rotate around the self axis 13; but also facilitate the blowing off of the particles. For example: when a part on the dust-binding roller 1 rotates to be in contact with the surface of the pole piece 200, particles on the pole piece 200 are adhered; after adhesion, the part is spun off the pole piece 200 and moved to the top of the dust-sticking roller 1. At this time, particles at this point are detached by the air knife assembly 31.

The air outlet 311 of the air knife assembly 31 is directed towards the side of the dust collection assembly 2, which aims to facilitate better entry of blown particles into the dust collection assembly 2. Such as: the air outlet 311 of the air knife assembly 31 faces the side of the dust collecting cavity 211 of the dust collecting assembly 2.

By means of the design, the direction of the air knife assembly 31 is reasonably controlled, particles are conveniently blown off, the particles can better enter the dust collection assembly 2, and the dust removal effect is improved.

Optionally, referring to fig. 4, the dust-binding roller 1 includes a rotating shaft 11 and a dust-binding portion 12 protruding on the rotating shaft 11, where the dust-binding portion 12 extends along an axis 13 of the dust-binding roller 1 and is used for contacting with the pole piece 200.

The dust-sticking portion 12 is a structure that contacts the pole piece 200 and can stick particles, and the material thereof may be selected from, but not limited to, silica gel, butyl rubber, etc.

The number of dust-sticking sections 12 may be one or more. When the number of dust adhering portions 12 is plural, all the dust adhering portions 12 may be disposed at intervals around the outer periphery of the axis 13.

In this way, the dust-sticking roller 1 is designed with the rotation shaft 11 and the dust-sticking portion 12 so that the dust-sticking roller 1 can be stably mounted by the rotation shaft 11, and particles can be stably stuck by the dust-sticking portion 12.

According to some embodiments of the present application, optionally, referring to fig. 4, the dust-binding part 12 includes at least two, all dust-binding parts 12 are disposed around the periphery of the axis 13, and each dust-binding part 12 is inclined or curved along the same rotation direction of the dust-binding roller 1.

The periphery of the rotating shaft 11 is provided with the plurality of dust adhering parts 12, so that a deformable space is formed between two adjacent dust adhering parts 12, and when the dust adhering parts 12 contact the pole piece 200, the dust adhering parts 12 can deform correspondingly, and the possibility of scraping active substances on the pole piece 200 due to the abutting of the dust adhering parts 12 and the pole piece 200 is reduced.

The dust-binding part 12 is inclined or curved toward the same rotation direction, so that the dust-binding part 12 may include a windward side 121 disposed obliquely or curved, and a dust-binding side 122 disposed opposite to the windward side 121, the dust-binding side 122 being for contact with the pole piece 200. When the air knife assembly 31 blows air to the windward side 121, the dust-sticking portion 12 rotates in a direction opposite to the inclined or curved direction, so that each dust-sticking surface 122 sequentially sweeps over the surface of the pole piece 200 to complete the dust removal operation. Wherein the rotation direction may be counterclockwise or clockwise.

In this way, each dust-binding part 12 is inclined or bent towards the same rotation direction, so that the air knife assembly 31 can drive the dust-binding roller 1 to rotate stably, and the dust removing operation can run stably.

According to some embodiments of the present application, the dust removing mechanism 10 optionally further includes a one-way bearing (not shown) provided on the dust-binding roller 1 to control the one-way rotation of the dust-binding roller 1 about its own axis 13.

A one-way bearing refers to a bearing that is free to rotate in one direction and to lock in the other direction. This restricts the dust-sticking roller 1 to rotate in only one direction.

Thus, the dust-sticking roller 1 is rotated in one direction by the one-way bearing, so that the dust-sticking roller 1 does not rotate reversely due to misoperation, and further the accumulation of particles on the dust-sticking roller 1 due to reversion is reduced.

Referring to fig. 1, according to some embodiments of the present application, the present application provides a pole piece dust removing device 100, where the pole piece dust removing device 100 includes: a conveying mechanism 20 and a dust removing mechanism 10 as described in any one of the above. The conveying mechanism 20 is used for conveying the pole piece 200; the dust-binding roller 1 is in contact with the pole piece 200 on the conveying mechanism 20.

The conveying mechanism 20 is a device for providing power for conveying the pole piece 200, and may be a conveying roller structure, a belt type conveying structure or the like.

The pole piece dust removing device 100 adopts the dust removing mechanism 10, so that the probability that particles adhered to the dust adhering roller 1 are contacted with the pole piece 200 again can be effectively reduced, and the risk of secondary pollution of the pole piece 200 is reduced. Meanwhile, the positions of the dust-sticking roller 1, which are separated from the particles, restore the adhesion capability, so that the dust-sticking roller 1 can continuously and stably carry out dust removal operation. In addition, the dust collection assembly 2 can utilize the suction capacity to directly suck dust to the pole piece 200 during operation, and thus, the dust collection assembly is matched with the dust adhering roller 1 to form two different dust collection modes, the dust collection effect of the pole piece 200 is enhanced, and the dust collection efficiency is improved.

Optionally, referring to fig. 2, according to some embodiments of the present application, the conveying mechanism 20 includes a conveying roller 201 around which the pole piece 200 is wound, and the dust-binding roller 1 is disposed on the conveying roller 201 at a position where the pole piece 200 is supported.

The transfer roller 201 is a structure that drives the pole piece 200 to be conveyed forward by its own rotational energy, and most of it is designed in a cylindrical structure. The dust-binding roller 1 is arranged at the position of the conveying roller 201, which supports the pole piece 200, and the position of the dust-binding roller 1 is the position of the conveying roller 201, which corresponds to the position of the pole piece 200, so that the conveying roller 201 can also support the dust-binding roller 1 in the dust removal process, and can also support the blowing force of the air knife assembly 31 to the pole piece 200.

The number of the transfer rollers 201 may be not limited to three as illustrated in fig. 1, but may be other, such as: four, five, etc. For ease of illustration, three are illustrated with pole piece 200 wound in sequence around three transfer rolls 201. Above the pole piece 200, the dust-binding roller 1 can act on the middle conveying roller 201, so that the conveying roller 201 can support the acting force of the dust-binding roller 1 and the air knife assembly 31, and the dust removal is enabled to stably run.

In this way, the dust-sticking roller 1 is arranged at the top of the transmission roller 201, so that the shaking of the pole piece 200 in the dust removal process can be effectively reduced, the abnormal phenomena of pole lug folding, deflection and the like of the pole piece 200 in the processing process can be effectively reduced, and the processing quality of the pole piece 200 can be improved.

Optionally, referring to fig. 5, the dust removal mechanism 10 includes at least two according to some embodiments of the present application. Of all the dust removing mechanisms 10, two of the dust removing mechanisms 10 are respectively located on opposite sides of the pole piece 200 in the thickness direction thereof.

The number of dust removing mechanisms 10 may be not limited to the two shown in fig. 5, but may be other, such as: three, four or more. The dust removing mechanism 10 may be one or more in at least one side of the pole piece 200 in the thickness direction thereof. Such as: in the same side of the pole piece 200, a plurality of dust removing mechanisms 10 are spaced apart along the conveying direction of the pole piece 200.

In this way, at least one dust removing mechanism 10 is distributed on two opposite sides of the pole piece 200 along the thickness direction of the pole piece 200, so that the upper side surface and the lower side surface of the pole piece 200 can be effectively removed with dust, and the processing quality of the pole piece 200 is improved.

According to some embodiments of the present application, there is provided a battery production system including the pole piece dust removal device 100 of any one of the above.

Referring to fig. 1 to 5, according to some embodiments of the present application, a dust removing mechanism 10 is provided, where the number of dust removing mechanisms 10 is at least two, and two opposite sides of a pole piece 200 are respectively configured with at least one dust removing mechanism 10. The dust removing mechanism 10 includes a dust adhering roller 1, an air knife assembly 31, and a dust collecting assembly 2. The pole piece 200 is transported from left to right by the transfer roller 201, and the dust removal above the pole piece 200 is described as an example, and the pole piece 200 moves from left to right. The upper surface of the pole piece 200 sequentially passes through the dust collection assembly 2, the dust adhering roller 1 and the air knife assembly 31, and the dust particle rate is firstly subjected to the first dust removal design effect: the dust collection assembly 2 sucks out. The dust-binding roller 1 rotates anticlockwise under the wind force of the air knife assembly 31, and then the particles fixed on the pole piece 200 and the rest of the residual particles are transferred to a second dust-removing design: the dust particles of the dust-binding roller 1 are rotationally moved to the top under the action of wind force at the bottom of the dust-binding roller 1, are separated from the dust-binding roller 1 under the action of wind, and enter the dust collection assembly 2 in a nearly parabolic form. The rest wind force of the air knife acts on the pole piece 200 to blow the particles leaked from the previous two dust removing protection devices to the dust adhering roller 1 again, so as to form a third dust removing design.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (13)

1. A dust removal mechanism, characterized in that the dust removal mechanism comprises:

a dust-binding roller (1) configured to be rotatable about its own axis (13) to adhere particles on the pole piece (200);

-a separator (3) for at least detaching particles adhering to the dust-binding roller (1) from the dust-binding roller (1), the separator (3) being configured as an air knife assembly (31), the air knife assembly (31) being configured to blow air against the dust-binding roller (1) to drive the dust-binding roller (1) to rotate about its own axis (13) and detach the particles from the dust-binding roller (1);

the dust collecting assembly (2), dust adhering roller (1) is located at least partly in dust collecting assembly (2), dust collecting assembly (2) are used for sucking the granule that breaks away from, air outlet (311) of air knife assembly (31) are towards dust adhering roller (1) keep away from a part of pole piece (200), and towards dust collecting assembly (2) place one side setting.

2. The dust removing mechanism according to claim 1, wherein the dust collecting assembly (2) comprises an aspirator and a dust collecting member (21), the dust collecting member (21) is provided with a dust collecting cavity (211) and an opening (212) communicated with the dust collecting cavity (211), the dust adhering roller (1) is rotatably connected to a cavity wall of the dust collecting cavity (211) and acts on the pole piece (200) through the opening (212), and the aspirator is used for sucking the inside of the dust collecting cavity (211).

3. The dust removal mechanism as claimed in claim 2, wherein the dust collection member (21) further has a transfer passage (213), and the aspirator communicates with the dust collection chamber (211) through the transfer passage (213).

4. A dust removing mechanism according to claim 3, characterized in that the inner wall of the conveying channel (213) comprises a receiving portion (214) at one side of the opening (212), the receiving portion (214) being adapted to receive particles partly detached from the dust-binding roller (1).

5. The dust removal mechanism of claim 2, wherein the dust collection assembly (2) further comprises a flow guide (22) having a flow guide channel (221), the flow guide channel (221) having one end in communication with the dust collection chamber (211) and the other end in communication with the aspirator.

6. The dust removal mechanism of claim 5, wherein the cross-sectional area of the flow guide channel (221) increases and decreases from an end of the flow guide channel (221) proximate the dust collection chamber (211) to an end of the flow guide channel (221) distal the dust collection chamber (211).

7. The dust removal mechanism as claimed in any one of claims 1-6, wherein the dust-binding roller (1) comprises a rotating shaft (11) and a dust-binding portion (12) protruding on the rotating shaft (11), the dust-binding portion (12) extending along an axis (13) of the dust-binding roller (1) and being adapted to be in contact with the pole piece (200).

8. The dust removing mechanism according to claim 7, wherein the dust adhering portions (12) include at least two, all of the dust adhering portions (12) are disposed around the outer periphery of the axis (13), and each of the dust adhering portions (12) is inclined or curved in the same rotational direction of the dust adhering roller (1).

9. The dust removal mechanism according to any one of claims 1-6, further comprising a one-way bearing provided on the dust-binding roller (1) to control one-way rotation of the dust-binding roller (1) about its own axis (13).

10. The utility model provides a pole piece dust collector which characterized in that, pole piece dust collector includes:

a conveying mechanism (20) for conveying the pole pieces (200);

the dust removal mechanism of any one of claims 1-9, the dust-binding roller (1) being in contact with a pole piece (200) on the transport mechanism (20).

11. The pole piece dust removal device according to claim 10, wherein the conveying mechanism (20) comprises a conveying roller (201) around which the pole piece (200) winds, and the dust adhering roller (1) is arranged on the conveying roller (201) at a position where the pole piece (200) is supported.

12. The pole piece dust removal device according to claim 10, wherein the dust removal mechanism includes at least two, of which two are located on opposite sides of the pole piece (200) in the thickness direction thereof, respectively, in all of the dust removal mechanisms.

13. A battery production system, characterized in that it comprises a pole piece dust removal device according to any one of claims 10-12.