Pole piece rolling device

Abstract

The utility model discloses a pole piece rolling device. The pole piece rolling device comprises: a pressure roller and a dry ice cleaning mechanism, wherein the pressure roller has a roller surface and is rotatably arranged; the dry ice cleaning mechanism comprises at least one dry ice spraying member, which is located at the periphery of the pressure roller and is arranged toward the roller surface, and the dry ice spraying member can spray dry ice onto the roller surface, and the dry ice cleaning mechanism is connected to a dry ice supply device, and the dry ice supply device delivers dry ice to the dry ice cleaning mechanism. According to the pole piece rolling device of the utility model, the problem that the metal scraper affects the service life of the pressure roller of the pole piece rolling device is solved.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery production equipment, in particular to a pole piece rolling device. Background Art

[0002] In the field of battery manufacturing technology, due to the stickiness of dust on the surface of the pole piece, dust easily adheres to the roller during rolling, causing secondary pollution to the pole piece. In order to avoid the impact of dust, existing equipment usually uses a metal scraper to scrape off the dust adhered to the roller surface. This method easily scratches the surface of the roller. When the coating on the surface of the roller becomes thinner, the hardness of the roller surface changes, shortening the service life of the roller. Utility Model Content

[0003] The embodiment of the utility model provides a pole piece rolling device, which solves the problem that a metal scraper affects the service life of a roller of the pole piece rolling device.

[0004] An embodiment of the utility model provides a pole piece rolling device, comprising a pressure roller and a dry ice cleaning mechanism, wherein the pressure roller has a roller surface and is rotatably arranged; the dry ice cleaning mechanism comprises at least one dry ice blasting component, wherein the dry ice blasting component is located at the periphery of the pressure roller and is arranged toward the roller surface, and the dry ice blasting component can spray dry ice onto the roller surface, and the dry ice cleaning mechanism is connected to a dry ice providing device, and the dry ice providing device delivers dry ice to the dry ice cleaning mechanism.

[0005] According to the pole piece rolling device of the embodiment of the utility model, dry ice is sprayed onto the roller surface by the dry ice blasting member, and the dry ice particles hit the roller surface, thereby reducing the roller surface temperature, causing the adhered dust to crack and reduce the adhesion force, and the dry ice particles rapidly expand on the roller to produce a micro explosion, so that the dust is separated from the roller. By controlling the parameters of the dry ice blasting, it is possible to avoid roller surface damage such as thermal deformation, oxidation, ablation, surface roughness, and change in roller surface hardness.

[0006] According to the above-mentioned embodiment of the utility model, the dry ice cleaning mechanism includes a plurality of dry ice blasting parts, and the plurality of dry ice blasting parts are arranged along the axial direction of the pressure roller. Arranging a plurality of dry ice blasting parts according to the axial length of the pressure roller can make the roller surface of the pressure roller clean more evenly.

[0007] According to any of the above embodiments of the utility model, the pole piece rolling device further comprises a dust hood mechanism, the dust hood mechanism comprises a dust hood body, the dust hood body comprises a dust suction cavity having an opening, and the opening is arranged toward the roller surface. The dust hood mechanism absorbs dust through high-speed airflow to prevent metal dust from falling on the pole piece.

[0008] According to any of the above embodiments of the utility model, the dry ice blasting member is disposed through the dust hood body, and the outlet of the dry ice blasting member extends into the dust suction chamber. The entire dry ice cleaning process and dust adsorption process are completed in the dust hood body, so that there is no risk of metal dust falling during the entire dry ice cleaning process.

[0009] According to any of the above embodiments of the utility model, the dust hood mechanism is connected to a negative pressure generating device through a pipeline. The negative pressure generating device is the suction source of the dust hood.

[0010] According to any of the above embodiments of the present invention, the dust hood mechanism comprises a plurality of dust hood bodies, and the dust hood bodies are arranged along the axial direction of the pressure roller. The plurality of dust hood bodies can effectively absorb the dust generated by each dry ice blasting component when it is working.

[0011] According to any of the aforementioned embodiments of the utility model, the pole piece rolling device also includes a linear module, the dry ice cleaning mechanism and the dust hood mechanism are arranged on the linear module, and the linear module is used to drive the dry ice cleaning mechanism and the dust hood mechanism to move along the axial direction of the pressure roller.

[0012] According to any of the above embodiments of the utility model, the pressing rollers are arranged in pairs, the pole piece passes between the paired pressing rollers and is squeezed by the pressing rollers, the outer periphery of each pressing roller is provided with the dry ice cleaning mechanism, and the outer periphery of each pressing roller is provided with the dust collecting cover mechanism. During operation, the pole piece is squeezed by the upper pressing roller and the lower pressing roller to achieve material extension.

[0013] According to any of the above embodiments of the present utility model, the pole piece rolling device further comprises a carbon dioxide concentration detector, which is arranged on the outer peripheral side of the pressing roller, and stops when the carbon dioxide concentration is detected to be too high.

[0014] According to any of the above embodiments of the utility model, the pole piece rolling device further comprises a roller temperature sensor, the roller temperature sensor is arranged corresponding to the roller surface, and the roller temperature sensor can monitor the roller surface temperature. The roller temperature sensor monitors the roller surface temperature in real time to avoid uneven roller surface temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the pole piece rolling device of the utility model;

[0017] Figure 2 It is a plan view of an embodiment of the pole piece rolling device of the utility model;

[0018] Figure 3 It is a three-dimensional schematic diagram of a dust cover mechanism of an embodiment of the pole piece rolling device of the utility model;

[0019] Figure 4 It is a front view schematic diagram of a dust cover mechanism of an embodiment of the pole piece rolling device of the utility model;

[0020] Figure 5 It is a side view schematic diagram of the dust hood mechanism of an embodiment of the pole piece rolling device of the utility model.

[0021] Description of reference numerals:

[0022] 100-pole piece rolling device;

[0023] 110-pressing roller;

[0024] 120-dry ice cleaning mechanism; 121-dry ice blasting member;

[0025] 130 - dust hood mechanism; 131 - dust hood body;

[0026] 140-Linear module;

[0027] 150-Carbon dioxide concentration detector;

[0028] 160-pressure roller temperature sensor;

[0029] 170-Pole piece.

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] In this embodiment, if Figure 1 As shown, the pole piece rolling device 100 includes a roller 110 and a dry ice cleaning mechanism 120. The roller 110 has a roller surface and is rotatable. The dry ice cleaning mechanism 120 includes at least one dry ice blasting member 121. The dry ice blasting member 121 is located at the periphery of the roller 110 and is arranged toward the roller surface. The dry ice blasting member 121 can blast dry ice toward the roller surface. The dry ice cleaning mechanism 120 is connected to a dry ice supply device, and the dry ice supply device delivers dry ice to the dry ice cleaning mechanism 120. The dry ice is sprayed onto the roller surface by the dry ice blasting member 121. The dry ice particles hit the surface of the roller 110, and the surface temperature of the roller 110 is reduced at the same time, so that the adhered dust cracks and reduces the adhesion. The dry ice particles rapidly expand on the roller 110 to produce a micro explosion, so that the dust is separated from the roller 110. By controlling the parameters of the dry ice blasting, the roller surface damage such as thermal deformation, oxidation, ablation, surface roughness, and change in roller surface hardness can be achieved.

[0035] In the above embodiment, if Figure 2 As shown, the dry ice cleaning mechanism 120 includes a plurality of dry ice blasting members 121, and the plurality of dry ice blasting members 121 are arranged along the axial direction of the pressure roller 110. The dry ice blasting members 121 may be cylindrical or conical nozzles or spray heads. In actual work, a plurality of dry ice blasting members 121 are correspondingly arranged according to the axial length of the pressure roller 110 and the spraying range of the dry ice blasting members 121, so that the roller surface of the pressure roller 110 can be cleaned more evenly.

[0036] In some embodiments, Figure 3 , Figure 4 , Figure 5As shown, the pole piece rolling device 100 further includes a dust cover mechanism 130, and the dust cover mechanism 130 includes a dust cover body 131, and the dust cover body 131 includes a dust collection cavity with an opening, and the opening is arranged toward the roller surface. The opening shape of the dust cover body 131 fits the shape of the roller surface, and there is a gap between the dust cover body 131 and the roller surface. After the dust is separated from the pressing roller 110, the high-speed airflow in the dust cover body 131 absorbs the dust away, preventing metal dust from falling on the pole piece 170, causing the pole piece 170 to puncture the diaphragm due to lithium deposition, causing the battery to short-circuit and catch fire, or even battery explosion.

[0037] In some embodiments, the dry ice blasting member 121 is inserted into the dust hood body 131, and the outlet of the dry ice blasting member 121 extends into the dust suction chamber. In this embodiment, the dust hood body 131 is provided with an opening, and the dry ice blasting member 121 is fixedly connected to the opening of the dust hood body 131 by a fastener. The dry ice blasting member 121 sprays dry ice particles into the dust hood body 131 through the opening of the dust hood body 131. The entire dry ice cleaning process and dust adsorption process are completed in the dust hood body 131. The dust hood mechanism 130 can prevent dust from being scattered due to the impact of dry ice particles, so that there is no risk of metal dust flying in the air or falling on the roller surface during the entire dry ice cleaning process.

[0038] In some embodiments, the dust hood mechanism 130 is connected to a negative pressure generating device through a pipe 132. The negative pressure generating device is the source of suction force of the dust hood, and the negative pressure of the negative pressure generating device can be adjusted, thereby controlling the suction force in the dust hood.

[0039] In some embodiments, the dust hood mechanism 130 includes a plurality of dust hood bodies 131, which are arranged along the axial direction of the pressure roller 110. The dust hood bodies 131 are arranged one by one with the dry ice blasting components 121, and the plurality of dust hood bodies 131 enable the dust generated by each dry ice blasting component 121 to be effectively absorbed when working.

[0040] In some embodiments, the pole piece rolling device 100 further includes a linear module 140, on which the dry ice cleaning mechanism 120 and the dust cover mechanism 130 are disposed, and the linear module 140 is used to drive the dry ice cleaning mechanism 120 and the dust cover mechanism 130 to move along the axial direction of the pressing roller 110. The linear module 140 and the dust cover mechanism 130 are connected by a connector, and in this embodiment, the connector is an L-shaped iron sheet, one end of which is fixedly connected to the dust cover mechanism 130, and the other end is fixedly connected to the linear module 140.

[0041] In some embodiments, the pressing rollers 110 are arranged in pairs, and the pole piece 170 passes between the paired pressing rollers 110 and is squeezed by the pressing rollers 110. A dry ice cleaning mechanism 120 is arranged on the periphery of each pressing roller 110, and a dust collecting cover mechanism 130 is arranged on the periphery of each pressing roller 110. The pole piece rolling device 100 includes two symmetrically arranged upper and lower pressing rollers 110. When working, the pole piece 170 is squeezed by the upper pressing roller 110 and the lower pressing roller 110 to achieve material extension.

[0042] In some embodiments, the pole piece rolling device 100 further includes a carbon dioxide concentration detector 150, which is disposed on the outer peripheral side of the pressing roller 110. When the carbon dioxide concentration is detected to be too high, the machine is shut down, and the negative pressure of the negative pressure generating device is increased, and the vacuum adsorption is increased to avoid danger caused by excessive carbon dioxide concentration in a local area. The carbon dioxide concentration detector 150 is connected to the negative pressure generating device and the pressing roller driving device by signal.

[0043] In some embodiments, the pole piece rolling device 100 further includes a roller temperature sensor 160, which is arranged corresponding to the roller surface and can monitor the roller surface temperature. The roller temperature sensor 160 monitors the surface temperature of the roller 110 in real time to avoid uneven surface temperature of the roller 110.

[0044] In the above embodiment, during operation, dust adheres to the pressure roller 110. When the pressure roller 110 rotates to the dry ice cleaning mechanism 120, without affecting the product process requirements, the sprayed dry ice collides with the surface of the pressure roller 110 at a high speed, the impact kinetic energy dissipates, and extremely fast heat transfer occurs between the dry ice particles and the surface of the pressure roller 110. The surface temperature of the pressure roller 110 is reduced, so that the dust adhered to the surface of the pressure roller 110 is frozen to brittleness and burst, resulting in cracks, reducing the adhesion force, and affecting the mechanical properties of the adhered dust. At the same time, after the dry ice particles enter the cracks of the adhered dust, they are rapidly vaporized, and their volume increases by 800 times, and a micro explosion is generated at the impact point, so that the adhered dust is separated from the surface of the pressure roller 110. Since the dry ice evaporates, this method does not generate secondary pollution in the process, no secondary waste is generated, online cleaning is achieved, and equipment downtime is reduced. This cleaning method can ensure that there is basically no impact on the surface of the pressure roller 110, thereby increasing the service life of the pressure roller 110. By controlling the parameters of dry ice blasting, it is possible to prevent roller surface damage such as thermal deformation, oxidation, ablation, surface roughness, and changes in roller surface hardness. The roller surface is cleaned to reveal its true color, with no dust residue with a particle size of ≥ 0.1 mm on the surface. Dry ice cleaning does not affect the life of the pressure roller 110, and can meet a maximum cleaning speed of 140 m / min, with a mass production speed of up to 120 m / min.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pole piece rolling device, characterized in that: include: A pressure roller, wherein the pressure roller has a roller surface and is rotatably arranged; A dry ice cleaning mechanism, wherein the dry ice cleaning mechanism comprises at least one dry ice blasting component, wherein the dry ice blasting component is located at the periphery of the pressure roller and is arranged toward the roller surface, wherein the dry ice blasting component can spray dry ice toward the roller surface, and wherein the dry ice cleaning mechanism is connected to a dry ice supply device, wherein the dry ice supply device delivers dry ice to the dry ice cleaning mechanism.

2. The pole piece rolling device according to claim 1, characterized in that: The dry ice cleaning mechanism includes a plurality of dry ice blasting members, and the plurality of dry ice blasting members are arranged along the axial direction of the pressure roller.

3. The pole piece rolling device according to claim 1, characterized in that: The pole piece rolling device further comprises a dust hood mechanism, wherein the dust hood mechanism comprises a dust hood body, and the dust hood body comprises a dust suction cavity having an opening, wherein the opening is arranged toward the roller surface.

4. The pole piece rolling device according to claim 3, characterized in that: The dry ice blasting component is disposed through the dust hood body, and an outlet of the dry ice blasting component extends into the dust suction cavity.

5. The pole piece rolling device according to claim 3, characterized in that: The dust hood mechanism is connected with the negative pressure generating device through a pipeline.

6. The pole piece rolling device according to claim 3, characterized in that: The dust hood mechanism comprises a plurality of dust hood bodies, and the dust hood bodies are arranged along the axial direction of the pressure roller.

7. The pole piece rolling device according to claim 3, characterized in that: The pole piece rolling device further comprises a linear module, the dry ice cleaning mechanism and the dust cover mechanism are arranged on the linear module, and the linear module is used to drive the dry ice cleaning mechanism and the dust cover mechanism to move along the axial direction of the pressing roller.

8. The pole piece rolling device according to claim 3, characterized in that: The pressure rollers are arranged in pairs, the pole pieces pass between the paired pressure rollers and are squeezed by the pressure rollers, the outer periphery of each pressure roller is provided with the dry ice cleaning mechanism, and the outer periphery of each pressure roller is provided with the dust hood mechanism.

9. The pole piece rolling device according to claim 1, characterized in that: The pole piece rolling device further comprises a carbon dioxide concentration detector, which is arranged on the outer peripheral side of the pressing roller.

10. The pole piece rolling device according to claim 1, characterized in that: The pole piece rolling device further comprises a roller temperature sensor, which is arranged corresponding to the roller surface and can monitor the roller surface temperature.

Images