Functional current collector evaporation plating device

Abstract

The utility model discloses an evaporation plating device for a functional current collector. The evaporation plating device comprises an evaporation boat, a heating device, an evaporation flow guide cover and a base film conveying mechanism, the evaporation boat is arranged below the base film conveying mechanism, the heating device is used for heating the evaporation boat, and the evaporation flow guide cover is arranged between the evaporation boat and the base film conveying mechanism; the evaporation flow guide cover is provided with a top opening and a bottom opening, the diameter of the bottom opening of the evaporation flow guide cover is larger than that of the top opening, and the diameter of a cover body is gradually decreased from the bottom opening to the top opening of the evaporation flow guide cover. According to the utility model, the aluminum splashing phenomenon can be reduced, the uniformity of evaporation coating is improved, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of evaporation coating, specifically relates to a functional current collector evaporation coating device. BACKGROUND

[0002] At present, the functional current collector is generally coated with aluminum by using vacuum evaporation technology. This technology vaporizes aluminum wire by heating and makes the vapor rise to the surface of the base film to be coated and condense into a film, so as to uniformly cover the surface of the base film with a metal layer and improve the electrical conductivity and mechanical properties of the current collector. However, the traditional vacuum evaporation process still faces some challenges in practical application, especially how to ensure the quality and production efficiency of the coating. With the growing demand for new energy vehicles and energy storage industries, higher requirements are put forward for the quality of the functional current collector.

[0003] In order to realize uniform deposition of aluminum metal, the existing vacuum evaporation technology usually adopts the following means: optimizing the design of the evaporation source, such as using multi-point evaporation or rotary evaporation source to ensure uniform distribution of aluminum vapor; adjusting the air pressure in the evaporation chamber to control the flow rate and path of aluminum vapor; pretreating the base film, such as cleaning and coating with a primer, to improve the adhesion of the aluminum film to the base film. Although these means can improve the coating quality to some extent, they also have their own limitations. For example, the multi-point evaporation design is complex and costly; adjusting the air pressure affects the stability and safety of the entire system; and pretreatment increases the process and prolongs the production cycle. Although the above-mentioned means can alleviate the problem of aluminum splashing and uneven coating to some extent, they still cannot completely avoid it; especially when the evaporation rate is high, it is easy to cause the aluminum vapor particles to be too large, causing local accumulation and forming a splashing phenomenon, which seriously affects the quality of the coating; in addition, the aluminum vapor is easy to cool and condense during transmission in a high-temperature environment, further aggravating the unevenness; these problems not only reduce the yield, but also increase the cost of reprocessing. SUMMARY

[0004] The purpose of the utility model is to provide a functional current collector evaporation coating device, which reduces the occurrence of aluminum splashing and improves the uniformity of the coating.

[0005] To achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0006] A functional current collector evaporation coating device, comprising an evaporation boat, a heating device, an evaporation flow guide cover and a base film conveying mechanism; the evaporation boat is arranged below the base film conveying mechanism, the heating device is used for heating the evaporation boat, and the evaporation flow guide cover is arranged between the evaporation boat and the base film conveying mechanism;

[0007] The evaporation guide cover has a top opening and a bottom opening, the diameter of the bottom opening of the evaporation guide cover is larger than the diameter of the top opening, and the diameter of the cover body gradually decreases from the bottom opening to the top opening of the evaporation guide cover.

[0008] To optimize the above technical solutions, the specific measures taken also include:

[0009] The bottom opening of the evaporation guide cover is flush with the upper surface of the evaporation boat, or the distance between the bottom opening of the evaporation guide cover and the upper surface of the evaporation boat is within 1 cm, or the bottom opening of the evaporation guide cover exceeds the upper surface of the evaporation boat downward.

[0010] The top opening of the evaporation guide cover is flush with the lower surface of the base film conveyed by the base film conveying mechanism, or the distance between the bottom opening of the evaporation guide cover and the lower surface of the base film conveyed by the base film conveying mechanism is within 2 cm.

[0011] Further, the inner wall of the evaporation guide cover is coated with a ceramic layer, the ceramic layer has a continuous smooth surface, and the ceramic layer coats the entire inner wall surface of the evaporation guide cover.

[0012] Further, the evaporation guide cover is provided with a heat preservation layer or a heating wire on the outside; the heat preservation layer or the heating wire covers the entire outer wall surface of the evaporation guide cover.

[0013] The bottom opening of the evaporation guide cover is larger than the upper surface of the evaporation boat, so that the bottom opening of the evaporation guide cover can cover the entire upper surface of the evaporation boat.

[0014] The diameter of the bottom opening of the evaporation guide cover is one to two times the length of the evaporation boat; and the diameter of the top opening of the evaporation guide cover is one tenth to one fifth of the diameter of the bottom opening.

[0015] The evaporation guide cover is in a horn-shaped structure or a conical structure.

[0016] The diameter of the cover body gradually and smoothly decreases from the bottom opening to the top opening of the evaporation guide cover.

[0017] Further, the heating device is an electric resistance heater or an infrared heating lamp.

[0018] Compared with the prior art, the evaporation guide cover has the following beneficial effects:

[0019] The functional fluid evaporation plating device is characterized in that the evaporation flow guide cover is arranged between the evaporation boat and the base film conveying mechanism, the evaporation flow guide cover is gradually changed in diameter from bottom to top into a narrow opening, the flow rate of the aluminum vapor is increased, and the aluminum vapor is more uniformly distributed on the surface of the base film; meanwhile, the evaporation flow guide cover serves as a heat preservation structure, the aluminum vapor is kept at a high temperature, is not condensed into solid, and reaches the surface of the base film, so that the splashing of aluminum caused by aluminum vapor particles and the uneven plating of the film are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The utility model discloses a functional fluid evaporation plating device's structure schematic diagram.

[0021] Figure 2 The utility model discloses a functional fluid evaporation plating device's structure schematic diagram.

[0022] Figure 3 The utility model discloses a functional fluid evaporation plating device's structure schematic diagram.

[0023] In the drawing: 1-evaporation boat, 2-heating device, 3-evaporation flow guide cover, 4-base film conveying mechanism, 5-bottom opening, 6-top opening, 7-base film, 8-ceramic layer, 9-heat preservation layer or heating wire, 10-unwinding roller, 11-winding roller, 12-passing roller, 13-evaporation roller. DETAILED DESCRIPTION

[0024] The above content of the utility model will be further explained in the form of embodiment, but this should not be understood as the range of the above subject matter of the utility model is limited to the following embodiment, and the technology realized based on the above content of the utility model belongs to the range of the utility model.

[0025] In the description of the utility model, it also needs to be explained that:

[0026] The orientation or position relationship in it is the relationship shown based on the drawing, is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or component must have a particular orientation, is constructed and operated in a particular orientation, therefore can not be understood as the limitation of the utility model.

[0027] The utility model provides a kind of functional fluid evaporation plating device, including evaporation boat 1, heating device 2, evaporation flow guide cover 3 and base film conveying mechanism 4;Evaporation boat 1 is located below base film conveying mechanism 4, heating device 2 is used to heat evaporation boat 1, evaporation flow guide cover 3 is arranged between evaporation boat 1 and base film conveying mechanism 4;

[0028] The evaporation shroud 3 has a top opening 6 and a bottom opening 5, the diameter of the bottom opening 5 of the evaporation shroud 3 is larger than that of the top opening 6, and the diameter of the shroud gradually decreases from the bottom opening 5 to the top opening 6.

[0029] The bottom opening 5 of the evaporation shroud 3 is flush with the upper surface of the evaporation boat 1, or the distance between the bottom opening 5 of the evaporation shroud 3 and the upper surface of the evaporation boat 1 is within 1 cm, or the bottom opening 5 of the evaporation shroud 3 exceeds the upper surface of the evaporation boat 1 downward.

[0030] The top opening 6 of the evaporation shroud 3 is flush with the lower surface of the base film 7 conveyed on the base film conveying mechanism 4, or the distance between the bottom opening 5 of the evaporation shroud 3 and the lower surface of the base film 7 conveyed on the base film conveying mechanism 4 is within 2 cm.

[0031] In some embodiments, the inner wall of the evaporation shroud 3 is coated with a ceramic layer 8, the ceramic layer 8 has a continuous smooth surface, the smooth surface of the ceramic layer 8 can reduce the premature condensation of aluminum vapor on the inner wall of the evaporation shroud 3, and facilitate cleaning; preferably, the ceramic layer 8 coats the entire inner wall of the evaporation shroud 3.

[0032] In some embodiments, a heat preservation layer or heating wire 9 is arranged on the outer side of the evaporation shroud 3; the heat preservation layer can be various selected from the existing heat preservation tin foil paper, heat preservation high polymer material layer, etc., the arrangement of the heat preservation layer or heating wire 9 can keep the aluminum vapor at a high temperature all the time, so that it will not condense into a solid state until reaching the surface of the base film 7; preferably, the heat preservation layer covers the entire outer wall of the evaporation shroud 3.

[0033] The bottom opening 5 of the evaporation shroud 3 is larger than the upper surface of the evaporation boat 1, so that the bottom opening 5 of the evaporation shroud 3 can cover the entire upper surface of the evaporation boat 1.

[0034] The diameter of the bottom opening 5 of the evaporation shroud 3 is one to two times the length of the evaporation boat 1; the diameter of the top opening 6 of the evaporation shroud 3 is one tenth to one fifth of the diameter of the bottom opening 5; through experiments, under the above-mentioned proportion, the evaporation and diffusion of aluminum vapor can effectively reach the base film 7 conveyed on the base film conveying mechanism 4 from the flow channel formed by the evaporation shroud 3, and a uniform deposition layer can be formed on the base film 7.

[0035] The evaporation shroud 3 in the present application can adopt a horn-shaped structure or a conical structure, which are only examples, and the evaporation shroud 3 in the present application is not limited thereto, as long as it has the transition feature of being large at the bottom and small at the top; preferably, the diameter of the shroud gradually and smoothly decreases from the bottom opening 5 to the top opening 6.

[0036] In some embodiments, the heating device 2 is an electric resistance heater or an infrared heating lamp.

[0037] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, further illustrates the following:

[0038] Specific components: such as Figure 1 As shown, the evaporation boat 1 is located above the heating device 2 and is used to load the aluminum wire to be evaporated; the evaporation guide hood 3 is installed above the evaporation boat 1 and has a trumpet-shaped structure with a larger diameter at the bottom and a gradually smaller diameter at the top near the surface of the base film 7; the base film conveying mechanism 4 is used to smoothly transport the base film 7 to the aluminum plating area.

[0039] Selection / Proportioning: The diameter of the bottom opening 5 of the evaporation guide hood 3 is 1.5 times the length of the evaporation boat 1; the diameter of the top opening 6 of the evaporation guide hood 3 is one-eighth the diameter of the bottom opening 5; the heating element is a resistance heater, and the temperature range is controllable between 600℃ and 900℃; the evaporation guide hood 3 is made of high-temperature resistant stainless steel with a thickness of about 2mm. The inner wall of the high-temperature resistant stainless steel is covered with a ceramic layer 8, and the outer wall of the high-temperature resistant stainless steel is equipped with a spiral heating wire to maintain the high temperature of aluminum vapor; the base film conveying mechanism 4 is driven by a motor, and the speed can be adjusted within the range of 0.5m / min to 2m / min.

[0040] Working process and principle: First, aluminum wire is placed in the evaporation boat 1, and the heating device 2 is activated to reach the set temperature. The aluminum wire is heated, melts, and evaporates into aluminum vapor. Then, the aluminum vapor moves upward into the evaporation guide hood 3. Due to the wider diameter of the lower part of the evaporation guide hood 3, the steam flow rate is lower, which is conducive to the full mixing and diffusion of aluminum vapor. When the steam reaches the narrow opening area at the top of the evaporation guide hood 3, the flow rate increases significantly, making the aluminum vapor more evenly distributed on the surface of the base film 7. At the same time, the heating wire on the evaporation guide hood 3 keeps the aluminum vapor at a high temperature to prevent premature condensation. Finally, when the base film 7 passes through the narrow opening area on the base film conveying mechanism 4, the aluminum vapor quickly condenses on its surface to form a uniform coating.

[0041] Operating steps and precautions: S1: Turn on the heating device and set a suitable temperature (650℃~800℃ recommended); S2: Place an appropriate amount of aluminum wire into the evaporation boat; S3: Start the base film conveying mechanism and adjust the appropriate speed (1m / min recommended); S4: Monitor the system operation and add aluminum wire as needed; S5: After aluminum plating is completed, turn off the power and remove the finished base film; S6: Clean the evaporation boat and evaporation guide hood regularly to ensure cleanliness.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the present utility model's technical solution and based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. A functional cluster fluid evaporation deposition apparatus, characterized by: The evaporation boat, the heating device, the evaporation flow guide cover and the base film conveying mechanism; the evaporation boat is arranged below the base film conveying mechanism, the heating device is used for heating the evaporation boat, and the evaporation flow guide cover is arranged between the evaporation boat and the base film conveying mechanism. The evaporation flow guide cover has a top opening and a bottom opening, the diameter of the bottom opening of the evaporation flow guide cover is greater than the diameter of the top opening, and the diameter of the cover body gradually decreases from the bottom opening to the top opening of the evaporation flow guide cover.

2. The functional fluid vapor deposition apparatus of claim 1, wherein: The bottom opening of the evaporation flow guide cover is flush with the upper surface of the evaporation boat, or the distance between the bottom opening of the evaporation flow guide cover and the upper surface of the evaporation boat is within 1cm, or the bottom opening of the evaporation flow guide cover exceeds the upper surface of the evaporation boat downward.

3. The functional fluid vapor deposition apparatus of claim 1, wherein: The top opening of the evaporation flow guide cover is flush with the lower surface of the base film conveyed by the base film conveying mechanism, or the distance between the bottom opening of the evaporation flow guide cover and the lower surface of the base film conveyed by the base film conveying mechanism is within 2cm.

4. The functional fluid vapor deposition apparatus of claim 1, wherein: The inner wall of the evaporation flow guide cover is coated with a ceramic layer, the ceramic layer has a continuous smooth surface, and the ceramic layer covers the entire inner wall surface of the evaporation flow guide cover.

5. The functional fluid vapor deposition apparatus of claim 1, wherein: The outer side of the evaporation flow guide cover is provided with a heat preservation layer or a heating wire; the heat preservation layer or the heating wire covers the entire outer wall surface of the evaporation flow guide cover.

6. The functional fluid vapor deposition apparatus of claim 1, wherein: The bottom opening of the evaporation flow guide cover is greater than the upper surface of the evaporation boat, so that the bottom opening of the evaporation flow guide cover can cover the entire upper surface of the evaporation boat.

7. The functional fluid vapor deposition apparatus of claim 1, wherein: The diameter of the bottom opening of the evaporation flow guide cover is one to two times the length of the evaporation boat; the diameter of the top opening of the evaporation flow guide cover is one tenth to one fifth of the diameter of the bottom opening.

8. The functional fluid vapor deposition apparatus of claim 1, wherein: The evaporation flow guide cover is a horn-shaped structure or a conical structure.

9. The functional fluid vapor deposition apparatus of claim 1, wherein: The diameter of the cover body gradually and smoothly decreases from the bottom opening to the top opening of the evaporation flow guide cover.

10. The functional fluid vapor deposition apparatus of claim 1, wherein: The heating device is an electric resistance heater or an infrared heating lamp.

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