Scraper device and vacuum coating system

Abstract

The utility model provides a scraper device and a vacuum coating system. The scraper device is used for vacuum coating, and comprises an operation platform configured to assemble a current collector film; the scraping wheel is arranged on the operation platform, and the scraping wheel is configured to scrape the part, exceeding the preset height, of the current collector film; the face, facing the operation platform, of the scraping wheel is a first face, the first face is a curved face, and the first face is made of viscous flexible materials. The current collector thin film is prevented from being damaged in the impurity scraping process by taking the first surface made of the curved surface and the flexible material as the scraping surface, and the first surface has low viscosity, so that the current collector thin film cannot be adhered, and the impurities can be effectively adsorbed. When the scraper device is used for processing the current collector film, the part exceeding the preset height can be effectively removed on the premise that the current collector film is not damaged, the standard area of the current collector film is increased, and the utilization rate of the current collector film is increased.

Description

Technical Field

[0001] The present disclosure relates to the field of vacuum coating technology, and in particular to a scraper device and a vacuum coating system. Background Art

[0002] The mobile composite current collector is relative to a single current collector. It uses polymer materials such as PET / PP as the intermediate layer base film. Through vacuum coating and other processes, a composite material formed by depositing double-layer copper / aluminum conductive layers on the upper and lower surfaces of the base film.

[0003] Currently, vacuum roll-to-roll evaporation is the most common method for fabrication. The detailed process flow is as follows: An evaporation boat melts the metal wire fed into it through resistance heating, forming a molten pool on the boat's surface. The liquid in the pool evaporates and then deposits onto the film surface. Due to the inherent fluctuations in the molten pool caused by dripping from the wire, new defects such as bumps, spatter, dense pitting, burns, dead folds, pinholes, and uncoated areas are prone to appearing during production. Highly abnormal aluminum chips deposited on the current collector surface can pose a significant safety risk to the finished battery, increasing the probability of short circuits. Utility Model Content

[0004] The purpose of the present disclosure is to provide a scraper device and a vacuum coating system that can solve at least one of the above-mentioned technical problems. The specific solution is as follows:

[0005] According to a specific embodiment of the present disclosure, on the one hand, the present disclosure provides a scraper device, which is used for vacuum coating, and the scraper device includes: an operating platform, which is configured to assemble a current collector film; a scraper wheel, which is arranged on the operating platform, and is configured to scrape off the portion of the current collector film that exceeds a preset height; wherein, the side of the scraper wheel facing the operating platform is a first side, the first side is a curved surface, and the first side is made of a sticky and flexible material.

[0006] In an optional embodiment, the viscosity coefficient of the material of the first surface is 2000-5000 Pa·s.

[0007] In an optional embodiment, the scraper device further includes: an elevator, the elevator is connected to the scraper wheel, and the elevator is configured to adjust the distance between the first surface and the current collector film.

[0008] In an optional embodiment, the scraper device further includes: a drive shaft, the drive shaft is sleeved inside the scraper wheel, and the drive shaft controls the rotation of the scraper wheel.

[0009] In an optional embodiment, the driving shaft controls the scraper to rotate back and forth.

[0010] In an optional embodiment, the scraper device further includes: a scraper configured to scrape off impurities adhering to the first surface; and a dust box configured to collect impurities scraped off by the scraper.

[0011] In an optional embodiment, the scraper has two substantially parallel sides, one side is arranged in the dust box and divides the dust box into two spaces, and the other side contacts the first surface.

[0012] In an optional embodiment, the operating platform is a temperature-controlled platform, and the operating platform includes: a temperature-controlled module, and the temperature-controlled module is configured to control the surface temperature of the operating platform.

[0013] In an optional embodiment, the scraper device further includes: a conveying mechanism, which is provided at both ends of the operating platform, and the conveying mechanism is configured to convey the current collector film so that the current collector film moves on the operating platform.

[0014] In an optional embodiment, the conveying mechanism includes: an unwinding mechanism, which is configured to release the current collector film; a winding mechanism, which is configured to wind up the current collector film after scraping; a first guide roller, which is located between the unwinding mechanism and the winding mechanism; a second guide roller, which is located between the first guide roller and the winding mechanism; wherein the first guide roller and the second guide roller are respectively located on the surfaces of both ends of the operating platform.

[0015] According to a specific embodiment of the present disclosure, on the other hand, the present disclosure provides a vacuum coating system, comprising: a scraper device as described in any one of the above technical solutions.

[0016] Compared with the prior art, the above solution of the embodiment of the present disclosure has at least the following beneficial effects:

[0017] The present invention uses a scraper with a curved surface to scrape the current collector film, and removes the portion that exceeds the preset height to achieve the required composite current collector safety standard. The first surface of the curved and flexible material is used as the scraping surface to prevent damage to the current collector film during the scraping process of impurities, and the first surface has low viscosity, which will not stick to the current collector film and can effectively absorb impurities. By using the scraper device disclosed in the present invention to process the current collector film, it can ensure that the portion that exceeds the preset height is effectively removed without damaging the current collector film, thereby increasing the area of ​​the current collector film that meets the standard and improving the utilization rate of the current collector film. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a scraper device according to an embodiment of the present disclosure is shown.

[0019] Figure 2 A schematic structural diagram of a scraper device according to another embodiment of the present disclosure is shown.

[0020] Figure 3 A schematic structural diagram of a scraper and a dust box according to an embodiment of the present disclosure is shown.

[0021] Figure 4 A schematic structural diagram of a scraper and a dust box according to another embodiment of the present disclosure is shown.

[0022] Reference numerals:

[0023] 100: operating platform;

[0024] 200: scraping wheel; 210: first side;

[0025] 300: drive shaft;

[0026] 410: scraper; 411: deflection portion; 420: dust box;

[0027] 510: unwinding mechanism; 520: rewinding mechanism; 530: first guide roller; 540: second guide roller. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the present disclosure more clear, the present disclosure will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only a portion of the embodiments of the present disclosure, rather than all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present disclosure without creative effort are intended to fall within the scope of protection of the present disclosure.

[0029] The terms used in the embodiments of the present disclosure are for the purpose of describing specific embodiments only and are not intended to limit the present disclosure. The singular forms "a," "an," "the," and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include plural forms, and unless the context clearly indicates otherwise, "a plurality" generally includes at least two.

[0030] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0031] It should be understood that although the terms "first," "second," "third," etc. may be used to describe structures in the embodiments of the present disclosure, these structures should not be limited to these terms. These terms are merely used to distinguish different structures. For example, a first component may also be referred to as a second component, and similarly, a second component may also be referred to as a first component without departing from the scope of the embodiments of the present disclosure.

[0032] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0033] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or device comprising the element.

[0034] In related technologies, highly abnormal aluminum chips deposited on the surface of the current collector pose a greater safety risk to the manufactured battery, leading to an increased probability of short circuits. The failure mechanism is as follows: First, large metal particles on the surface of the material pierce the diaphragm, etc., physically piercing and causing a short circuit; second, large metal particles cause the active material of the current collector to fall off and the surface density distribution to be uneven, affecting the battery's cycle, rate and other performance; third, during charging, the positive potential increases, and the metal in the copper foil, aluminum foil, current collector, diaphragm and other locations dissolves. As the electrolyte diffuses, it precipitates at the negative electrode, piercing the diaphragm and causing a short circuit. Regarding the above technical issues, in related technologies, one method is to reduce the probability of splashing by modifying the evaporator; the other method is to increase the distance between the membrane material and the evaporator to reduce the probability of splashing. These methods are limited to reducing the probability of splashing on the surface of the membrane material, and cannot prevent highly abnormal splashing from posing a greater safety risk to the battery.

[0035] In order to solve at least one of the technical problems mentioned above, the present disclosure provides a scraper device and a vacuum coating system; the scraper device is used for vacuum coating, and the scraper device may include: an operating platform 100, the operating platform 100 is configured to assemble a current collector film; a scraper wheel 200, the scraper wheel 200 is arranged on the operating platform 100, and the scraper wheel 200 is configured to scrape off the portion of the current collector film that exceeds a preset height; wherein, the side of the scraper wheel 200 facing the operating platform 100 is a first surface 210, the first surface 210 is a curved surface, the first surface 210 is made of a flexible material and has a viscosity coefficient of 2000-5000 Pa·s. The scraper device disclosed herein is used in a vacuum coating system. Each time coating is performed, there is a chance that the coating material will splash, causing problems such as new defects such as concave-convex spots, splashes, dense pitting, burns, dead folds, pinholes, and no-coating spots to appear on the formed current collector film (and semi-finished film). The scraper device disclosed herein scrapes the current collector film using a scraper wheel 200 with a curved surface, removing the portion that exceeds a preset height to achieve the required composite current collector safety standard. The first surface 210 made of a curved and flexible material is used as a scraping surface to prevent damage to the current collector film during the scraping process of impurities. The first surface 210 has a low viscosity, which will not stick to the current collector film and can effectively absorb impurities.

[0036] Optional embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0037] Figure 1 A schematic structural diagram of a scraper device according to an embodiment of the present disclosure is shown. Figure 2 FIG. 2 shows a schematic structural diagram of a scraper device according to another embodiment of the present disclosure. Figure 1 and Figure 2As shown, according to a specific embodiment of the present disclosure, on the one hand, a scraper device is provided, which is used for vacuum coating. The scraper device may include: an operating platform 100, the operating platform 100 is configured to assemble a current collector film; a scraper wheel 200, the scraper wheel 200 is arranged on the operating platform 100, and the scraper wheel 200 is configured to scrape off the portion of the current collector film that exceeds a preset height; wherein the side of the scraper wheel 200 facing the operating platform 100 is a first surface 210, the first surface 210 is a curved surface, and the first surface 210 is made of a flexible material with a viscosity coefficient of 2000-5000 Pa·s. The present disclosure scrapes off the current collector film by using a scraper wheel 200 with a curved surface, removing the portion that exceeds the preset height, so as to achieve the required composite current collector safety standard. The curved and flexible first surface 210 is used as a scraping surface to prevent damage to the current collector film during the scraping process of impurities, and the first surface 210 has a low viscosity, which will not stick to the current collector film and can effectively absorb impurities. By using the scraper device disclosed in the present invention to process the current collector film, it is possible to effectively remove the portion exceeding the preset height without damaging the current collector film, thereby increasing the area of ​​the current collector film that meets the standard and improving the utilization rate of the current collector film. The battery made of the current collector film processed by the scraper device disclosed in the present invention reduces the probability of short circuit and improves the cycle, rate and other performance of the battery. It should be noted that the width of the operating platform 100 is greater than or equal to the width of the current collector film. In an optional embodiment, the material of the first surface 210 of the scraper 200 is a flexible material such as silicone, rubber, etc., and has low viscosity to prevent splashing from falling onto the surface of the current collector film.

[0038] In some embodiments, the scraper device may further include: an elevator, the elevator being connected to the scraper wheel 200, and the elevator being configured to adjust the distance between the first surface 210 and the current collector film. According to a preset height, the distance between the first surface 210 and the operating platform 100 can be adjusted by the elevator, and the portion exceeding the preset height can be scraped off by the scraper wheel 200. It should be noted that the elevator is not limited to a fixed model and type. The elevator is used to adjust the distance between the first surface 210 and the current collector film. Any mechanism that can adjust the distance between the first surface 210 and the current collector film can be regarded as the elevator in the present disclosure.

[0039] In some embodiments, the scraper device may further include a drive shaft 300, which is sleeved within the scraper wheel 200 and controls the rotation of the scraper wheel 200. In an optional embodiment, the drive shaft 300 controls the reciprocating rotation of the scraper wheel 200. It should be noted that the scraper wheel 200 is cylindrical, with its axial direction substantially parallel to the width of the operating platform 100. The axial length of the scraper wheel 200 is greater than or equal to the width of the operating platform 100. In actual use, the radial cross-section of the scraper wheel 200 can be circular or semicircular, and the drive shaft 300 controls the reciprocating rotation of the scraper wheel 200. During the reciprocating rotation of the scraper wheel 200, the distance between the first surface 210 and the surface of the operating platform 100 remains constant, that is, the distance from the first surface 210 to the surface of the current collector film remains the same. The drive shaft 300 uses a ceramic bearing to prevent bearing wear and the generation of metal particles. The bearing can be moved up and down to adjust the height of the friction sleeve from the heating platform and has a function for setting the rotation speed.

[0040] Figure 3 A schematic structural diagram of a scraper 410 and a dust box 420 according to an embodiment of the present disclosure is shown. Figure 4 FIG. 4 shows a schematic structural diagram of a scraper 410 and a dust box 420 according to another embodiment of the present disclosure. Figure 3 and Figure 4 In some embodiments, the scraper device may further include: a scraper 410 configured to scrape off impurities adhering to the first surface 210; and a dust box 420 configured to collect impurities scraped off by the scraper 410. In an optional embodiment, the scraper 410 has two substantially parallel sides, one side being disposed within the dust box 420 to divide the dust box 420 into two spaces, and the other side being disposed on the first surface 210. It should be noted that the scraper 410 is provided on one side of the dust box 420 to divide the dust box 420 into two spaces. Since the scraper wheel 200 rotates back and forth, the impurities scraped by the scraper 410 fall on both sides of the scraper 410 when the scraper wheel 200 rotates clockwise and counterclockwise, so the dust box 420 is required on both sides of the scraper 410. It should be noted that in this embodiment, the side of the scraper 410 close to the dust box 420 divides the dust box 420 into two spaces. Alternatively, one dust box 420 can be provided on each side of the scraper 410, which also replaces the solution of this embodiment. The material of the scraper 410 can be graphite, stainless steel, etc. Figure 3As shown, one end of the scraper 410 just contacts the first surface 210 of the scraper wheel 200. As the scraper wheel 200 reciprocates, the scraper 410 scrapes impurities adhering to the first surface 210 off the scraper wheel 200, which then fall into the dust box 420. The scraper 410 is a plate-shaped structure, and the length of the scraper 410 (and the first surface 210) is greater than or equal to the axial length of the scraper wheel 200. In one optional embodiment, the scraper 410 is detachable. In another optional embodiment, the dust box 420 is detachable.

[0041] like Figure 4 As shown, in an optional embodiment, one end of the scraper 410 close to the first surface 210 is deflected toward the first surface 210 to form a deflection portion. The deflection portion facilitates increasing the size of the dust box 420 and improving the efficiency of dust collection. It should be noted that, since the first surface 210 is a curved surface, when the scraper 410 is a straight plate, the placement space of the dust box 420 close to the first surface 210 will be greatly reduced; so Figure 4 As shown, the end of the scraper 410 close to the first surface 210 is set as a deflection structure, so as to increase the placement space of the dust box 420 close to the first surface 210.

[0042] In some embodiments, the operating platform 100 is a temperature-controlled platform, and the operating platform 100 may include a temperature control module configured to control the surface temperature of the operating platform 100. In actual use, when the current collector film passes over the surface of the operating platform 100, the surface of the operating platform 100 is heated by the temperature-controlled platform, and the passing current collector film is heated by the surface of the operating platform 100. In the heated state, impurities on the current collector film are softened, and the scraper 200 scrapes off the impurities on the current collector film more cleanly, thoroughly, and labor-savingly; at the same time, the scraper 200 prevents the current collector film from being damaged due to excessive force when scraping hard impurities, and protects the current collector film when scraping off impurities again through the temperature control module.

[0043] In some embodiments, the scraper device may further include: a conveying mechanism, the conveying mechanism being disposed at both ends of the operating platform 100, the conveying mechanism being configured to convey the current collector film so that the current collector film moves on the operating platform 100. In an optional embodiment, the conveying mechanism may include: an unwinding mechanism 510, the unwinding mechanism 510 being configured to release the current collector film; a rewinding mechanism 520, the unwinding mechanism 510 being configured to rewind the scraped current collector film; a first guide roller 530, the first guide roller 530 being located between the unwinding mechanism 510 and the rewinding mechanism 520; and a second guide roller 540, the second guide roller 540 being located between the first guide roller 530 and the rewinding mechanism 520. The first guide roller 530 and the second guide roller 540 are respectively located on surfaces at both ends of the operating platform 100. The first guide roller 530 and the second guide roller 540 are both made of stainless steel.

[0044] According to a specific embodiment of the present disclosure, on the other hand, a vacuum coating system is provided, which may include: a scraper device as described in any one of the above embodiments.

[0045] The present disclosure aims to protect a scraper device and a vacuum coating system; the scraper device is used for vacuum coating, and the scraper device may include: an operating platform 100, the operating platform 100 is configured to assemble a current collector film; a scraper wheel 200, the scraper wheel 200 is arranged on the operating platform 100, and the scraper wheel 200 is configured to scrape off the portion of the current collector film that exceeds a preset height; wherein, the side of the scraper wheel 200 facing the operating platform 100 is a first surface 210, the first surface 210 is a curved surface, and the first surface 210 is made of a flexible material and has a viscosity coefficient of 2000-5000 Pa·s. The scraper device disclosed in the present invention is used in a vacuum coating system. Each time the coating is performed, there is a chance that the coating material will splash and cause other problems, resulting in the formation of new types of defects such as bumps, splashes, dense pitting, burns, dead folds, pinholes, and no coating points on the current collector film (and semi-finished film); the scraper device disclosed in the present invention scrapes the current collector film through a scraper wheel 200 with a curved surface, and removes the portion that exceeds the preset height to achieve the required composite current collector safety standard. The first surface 210 of a curved and flexible material is used as a scraping surface to prevent damage to the current collector film during the scraping process of impurities, and the first surface 210 has a low viscosity, which will not stick to the current collector film and can effectively absorb impurities. By using the scraper device disclosed in the present invention to process the current collector film, it is possible to effectively remove the portion that exceeds the preset height without damaging the current collector film, thereby reducing the probability of short circuit of the battery and improving the battery's cycle, rate and other performances.

[0046] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. References to the common and similar parts between the various embodiments will be sufficient. For the systems or devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, their descriptions are relatively simple; for relevant details, refer to the descriptions of the methods.

[0047] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A scraper device for vacuum coating, characterized in that: include: an operating platform configured to assemble a current collector film; a scraper wheel, the scraper wheel being arranged on the operating platform and configured to scrape off a portion of the current collector film exceeding a preset height; Wherein, the side of the scraper wheel facing the operating platform is the first side, the first side is a curved surface, and the first side is made of a flexible material with stickiness.

2. The scraper device according to claim 1, characterized in that The viscosity coefficient of the material of the first surface is 2000-5000 Pa·s.

3. The scraper device according to claim 1, characterized in that Also includes: An elevator is connected to the scraper, and the elevator is configured to adjust the distance between the first surface and the current collector film.

4. The scraper device according to claim 1, characterized in that Also includes: A drive shaft is sleeved inside the scraper wheel, and the drive shaft controls the scraper wheel to rotate back and forth.

5. The scraper device according to claim 3, characterized in that Also includes: a scraper configured to scrape off impurities stuck to the first surface; A dust box is configured to collect impurities scraped off by the scraper.

6. The scraper device according to claim 5, characterized in that The scraper has two substantially parallel sides, one side is arranged in the dust box and divides the dust box into two spaces, and the other side contacts the first surface.

7. The scraper device according to claim 5, characterized in that The operating platform is a temperature control platform, and the operating platform includes: A temperature control module is configured to control the surface temperature of the operating platform.

8. The scraper device according to any one of claims 1 to 7, characterized in that: Also includes: A conveying mechanism is provided at both ends of the operating platform and is configured to convey the current collector film so that the current collector film moves on the operating platform.

9. The scraper device according to claim 8, characterized in that The transmission mechanism comprises: an unwinding mechanism configured to release the current collector film; a winding mechanism, wherein the unwinding mechanism is configured to wind up the scraped current collector film; a first guide roller, the first guide roller being located between the unwinding mechanism and the rewinding mechanism; a second guide roller, the second guide roller being located between the first guide roller and the winding mechanism; Wherein, the first guide roller and the second guide roller are respectively located on surfaces at both ends of the operating platform.

10. A vacuum coating system, characterized in that: include: The scraper device according to any one of claims 1 to 9.

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