Evaporation coating device and battery production line

Abstract

The utility model belongs to the technical field of battery preparation, and discloses an evaporation coating device and a battery production line. The evaporation coating device is used for evaporating metal to the surface of a base film, the heating opening is formed in the bottom of the evaporation cavity, the evaporation carrier is arranged in the evaporation cavity, the wire feeding mechanism can convey metal wires to the evaporation carrier, and the laser heating head penetrates through the heating opening to heat the evaporation carrier. The metal wires on the evaporation carrier are melted to form molten metal, the molten metal is evaporated to form metal steam, the metal steam settles on a base film to form a metal coating, doping of conductive materials into the evaporation carrier is avoided, the evaporation carrier is not prone to being corroded by molten aluminum, the molten aluminum splashing condition is improved, the thickness of the metal coating is uniform, and the service life of the metal coating is prolonged. And the film forming quality is improved, automatic feeding of metal is achieved, and the production efficiency of the composite current collector is improved. According to the battery production line, by applying the evaporation coating device, the film forming quality and the production efficiency of the composite current collector are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery preparation, in particular to an evaporation coating device and a battery production line. Background Art

[0002] The composite current collector is a material composed of a three-layer composite structure of metal substrate-polymer base film-metal substrate. Compared with the traditional metal foil made by directly flattening the metal, the composite current collector has the advantages of high safety, light weight and small thickness. It is one of the indispensable electrode materials for preparing batteries.

[0003] Evaporation is a commonly used composite current collector production process in this field. The existing evaporation carrier is usually made of ceramic doped with conductive materials. When producing composite aluminum current collectors, aluminum has extremely high activity at high temperatures and reacts with most metals and compounds, which easily corrodes the evaporation carrier and forms pits, resulting in uneven surface temperature of the evaporation carrier, causing aluminum liquid to splash, and the aluminum liquid reacts with the conductive material (usually titanium diboride) to form crystals, which further aggravates the splash of aluminum liquid, resulting in uneven thickness of the metal coating, and even burning through the polymer base film. In addition, the existing technology usually places metal materials in the evaporation carrier in batches. After each placed metal material is evaporated, the equipment needs to be shut down, the evaporation carrier is taken out, and the metal material is replenished in it before evaporation can continue, resulting in low production efficiency.

[0004] Therefore, it is urgent to propose an evaporation coating device and a battery production line to solve the above problems. Utility Model Content

[0005] Based on the above, the first purpose of the utility model is to provide an evaporation coating device, which can prevent the evaporation carrier from being corroded by aluminum liquid, improve the splashing of aluminum liquid, thereby making the thickness of the metal coating uniform, improving the film formation quality, and realizing automatic feeding of metal, thereby improving the production efficiency of the composite current collector.

[0006] The second object of the utility model is to provide a battery production line, which can improve the film-forming quality and production efficiency of the composite current collector by applying the above-mentioned evaporation coating device.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An evaporation coating device is used to evaporate metal onto the surface of a base film, wherein the evaporation coating device comprises:

[0009] An evaporation chamber, wherein a heating port is provided at the bottom of the evaporation chamber;

[0010] An evaporation carrier, the evaporation carrier is arranged in the evaporation chamber;

[0011] A laser heating assembly, comprising a laser generator and a laser heating head, wherein the laser heating head passes through the heating port and is used to heat the evaporation carrier;

[0012] The wire feeding mechanism is used to transport the metal wire to or above the evaporation carrier. The metal wire is used to melt under the heating action of the laser heating head and form molten metal liquid in the evaporation carrier. The metal liquid evaporates under the heat to form metal vapor and settles on the base film to form a metal coating.

[0013] Furthermore, the evaporation carrier includes an evaporation boat and a mounting arm connected to the evaporation boat, and the mounting arm is connected to an inner wall of the evaporation chamber.

[0014] Furthermore, the evaporation carrier is provided with a groove, and the groove width of the groove gradually decreases from top to bottom.

[0015] Furthermore, the evaporation coating device also includes a mounting assembly arranged in the evaporation chamber, the mounting assembly includes at least two mounting seats, the evaporation carrier is fixed in a clamping space surrounded by at least two of the mounting seats, and the clamping distance of at least one of the mounting seats relative to the other mounting seats is adjustable.

[0016] Furthermore, the mounting assembly comprises a first mounting seat and a second mounting seat which are arranged opposite to each other, the evaporation carrier is clamped between the first mounting seat and the second mounting seat, and the distance between the first mounting seat and the second mounting seat is adjustable.

[0017] Furthermore, the mounting assembly also includes an adjustment structure, at least one of the first mounting seat and the second mounting seat is connected to the cavity wall of the evaporation chamber through the adjustment structure, the adjustment structure includes a bearing part, a connecting column and an elastic member, one end of the connecting column is connected to the cavity wall of the corresponding side of the evaporation chamber, the bearing part is slidably mounted on the connecting column, the elastic member is mounted on the connecting column, and one end of the elastic member abuts or is connected to the cavity wall of the evaporation chamber, and the other end abuts or is connected to the bearing part, and the bearing part is used to carry the evaporation carrier.

[0018] Furthermore, the evaporation coating device also includes a protective cover, which is arranged in the evaporation chamber and can be covered outside the laser heating head. The top of the protective cover is provided with an escape hole for avoiding the laser emitted by the laser heating head, and the top of the protective cover is in contact with the outer wall of the evaporation carrier.

[0019] Furthermore, the protective cover includes a top plate and a surrounding plate, the surrounding plate is erected in the evaporation chamber and is arranged around the heating port, the top plate is connected to the top of the surrounding plate, the avoidance port is opened on the top plate, and the top plate is used to support the bottom of the evaporation carrier.

[0020] Furthermore, the evaporation coating device also includes a cooling mechanism, and the cooling mechanism is used to cool the cavity wall of the evaporation chamber.

[0021] A battery production line comprises a collecting device and an evaporation coating device in any of the above schemes, wherein the collecting device is used to collect a base film coated with a metal layer processed by the evaporation coating device.

[0022] The beneficial effects of the utility model are:

[0023] The utility model provides an evaporation coating device for evaporating metal onto the surface of a base film. The evaporation coating device includes an evaporation chamber, an evaporation carrier, a laser heating component and a wire feeding mechanism. A heating port is provided at the bottom of the evaporation chamber. The evaporation carrier is arranged in the evaporation chamber. The laser heating component includes a laser generator and a laser heating head. The laser heating head passes through the heating port and is used to heat the evaporation carrier. The evaporation carrier is externally heated by the laser heating head, which replaces the heating method of "self-heating by conducting electricity to the evaporation carrier doped with a conductive material", so that the evaporation carrier is not easily corroded by aluminum liquid, the service life of the evaporation carrier is extended, and the aluminum liquid splashing is further improved, so that the thickness of the metal coating is uniform and the film forming quality is improved. The wire feeding mechanism is used to transport the metal wire onto or above the evaporation carrier, realize the automatic feeding of the metal, and improve the production efficiency of the composite current collector. The metal wire is used to melt under the heating action of the laser heating head and form a molten metal liquid in the evaporation carrier. The metal liquid is heated and evaporated to form metal vapor, and settles on the base film to form a metal coating.

[0024] The utility model also provides a battery production line, including a composite current collector collecting device and the above-mentioned evaporation coating device. The composite current collector collecting device is used to collect the base film coated with a metal layer processed by the evaporation coating device, that is, to obtain a composite current collector. By applying the evaporation coating device, the film forming quality and production efficiency of the composite current collector are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 It is a schematic cross-sectional structure diagram of an evaporation coating device provided by an embodiment of the utility model;

[0027] Figure 2 It is a cross-sectional structural schematic diagram of the evaporation chamber and the protective cover provided in the embodiment of the utility model;

[0028] Figure 3 It is a structural schematic diagram of an evaporation carrier and a mounting assembly provided in an embodiment of the utility model.

[0029] In the figure:

[0030] 100. Metal wire;

[0031] 1. Evaporation chamber; 11. Heating port; 12. Wire feeding port;

[0032] 2. evaporation carrier; 21. evaporation boat; 211. groove; 212. side wall; 22. mounting arm;

[0033] 3. Laser heating component; 31. Laser generator; 32. Laser heating head;

[0034] 4. Wire feeding mechanism; 41. Wire feeding motor; 42. Wire feeding reel; 43. Wire feeding tube;

[0035] 5. Mounting assembly; 51. First mounting seat; 52. Second mounting seat; 53. Adjustment structure; 531. Bearing part; 532. Connecting column; 533. Elastic member;

[0036] 6. Protective cover; 61. Top plate; 611. Escape; 62. Enclosure. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] like Figure 1 to Figure 3 As shown, this embodiment provides an evaporation coating device for evaporating metal onto the surface of a base film. The evaporation coating device includes an evaporation chamber 1, an evaporation carrier 2, a laser heating component 3 and a wire feeding mechanism 4. A heating port 11 is provided at the bottom of the evaporation chamber 1. The evaporation carrier 2 is arranged in the evaporation chamber 1. The laser heating component 3 includes a laser generator 31 and a laser heating head 32. The laser heating head 32 passes through the heating port 11 and is used to heat the evaporation carrier 2. The evaporation carrier 2 is externally heated by the laser heating head 32, and the heating method of "conducting electricity to the evaporation carrier 2 doped with a conductive material for self-heating" is abolished, so that the evaporation carrier 2 is not easily corroded by aluminum liquid, the service life of the evaporation carrier 2 is extended, and the manufacturing cost of the evaporation carrier 2 is reduced. At the same time, the conductive material and the aluminum liquid are reacted to form a large number of crystals deposited on the surface of the evaporation carrier 2, and the temperature distribution is uneven due to corrosion pits on the surface of the evaporation carrier 2, thereby improving the splashing of aluminum liquid, making the metal coating thickness uniform, and improving the film formation quality. The wire feeding mechanism 4 is used to transport the metal wire 100 to or above the evaporation carrier 2, thereby realizing automatic feeding of the metal and improving the production efficiency of the composite current collector. The metal wire 100 is used to melt under the heating action of the laser heating head 32 and form molten metal liquid in the evaporation carrier 2. The metal liquid evaporates by heat to form metal vapor, and settles on the base film to form a metal coating.

[0042] In this embodiment, the laser generator 31 is disposed outside the evaporation chamber, the laser heating head 32 is disposed at the output end of the laser generator 31, and the laser heating head 32 is located below the evaporation carrier 2 to heat the evaporation carrier 2. In other embodiments, the laser generator 31 may also be disposed in the evaporation chamber 1 or pass through the heating port 11, which is not limited here.

[0043] Preferably, the evaporation carrier 2 is made of ceramic or metal materials resistant to aluminum liquid corrosion, such as one or a mixture of materials such as boron nitride, aluminum nitride, and molybdenum.

[0044] It should be noted that the evaporation coating device provided in this embodiment can not only evaporate aluminum, but also evaporate other types of metals. The evaporation carrier 2 is subjected to spot heating by the laser heating component 3, which has the advantages of high heating efficiency, less heat radiation and low energy consumption.

[0045] like Figure 1 As shown, the wire feeding mechanism 4 includes a wire feeding motor 41, a wire feeding reel 42 and a wire feeding tube 43. The metal wire 100 is wound around the wire feeding reel 42, and the free end of the metal wire 100 is passed through the wire feeding tube 43. A wire feeding port 12 is provided on the cavity wall of the evaporation chamber 1. The wire feeding tube 43 passes through the wire feeding port 12 to connect the inside and outside of the evaporation chamber 1. The wire feeding motor 41 is used to provide wire feeding power to realize automatic feeding and improve production efficiency. Among them, the wire feeding port 12 can also be used as a window for observing the operating status of the evaporation carrier 2. Preferably, a pulley block is provided under the wire feeding reel 42 so that the wire feeding reel 42 can rotate freely, which is conducive to smoothly conveying the metal wire 100 to the upper surface of the evaporation carrier 2.

[0046] Specifically, the wire feeding mechanism 4 may further include a wire feeding tube 43 fixing device and a wire feeding reel 42 fixing frame, so as to prevent the wire feeding tube 43 and the wire feeding reel 42 from moving.

[0047] like Figure 1 and Figure 3As shown, in order to facilitate the installation of the evaporation carrier 2 into the evaporation chamber 1, the evaporation carrier 2 includes an evaporation boat 21 and a mounting arm 22 connected to the evaporation boat 21, and the mounting arm 22 is connected to the inner wall of the evaporation chamber 1, so as to realize the positioning of the evaporation carrier 2, so that the evaporation boat 21 is located directly above the heating port 11, and can be irradiated by the laser emitted by the laser heating head 32, and the setting of the mounting arm 22 can avoid the contact between the evaporation boat 21 and other components, reduce the heat loss of the evaporation boat 21, and prevent other components from being damaged by high temperature. In this embodiment, the length of the mounting arm 22 is 1 to 5 cm, which is convenient for connecting the evaporation boat 21 to the inner wall of the evaporation chamber 1 and reducing heat transfer. Exemplarily, the length of the mounting arm 22 can be 2 cm, 3 cm, 4 cm, 5 cm, 6 cm, etc., and is adaptively set according to the diameter of the evaporation boat 21, so that the mounting arm 22 can be connected to the inner wall of the evaporation chamber 1. Furthermore, the width of the mounting arm 22 is 2 to 6 cm, which is conducive to the stable connection between the mounting arm 22 and the evaporation boat 21 and the inner wall of the evaporation chamber 1. Exemplarily, the length of the mounting arm 22 can be 2 cm, 3 cm, 4 cm, 5 cm, etc., and is adaptively set according to the diameter of the evaporation boat 21, so that the mounting arm 22 can provide stable support for the evaporation boat 21.

[0048] In this embodiment, the evaporation boat 21 is cylindrical, and correspondingly, the heating port 11 is circular, which is conducive to increasing the heating area and the evaporation area, and improving the efficiency of evaporation. In other embodiments, the evaporation boat 21 can also be a prism, a crucible structure or other irregular structures, and correspondingly, the shape of the heating port 11 is the same as the cross-sectional shape of the evaporation boat 21, which is not limited here.

[0049] like Figure 1 and Figure 3As shown, a groove 211 is provided in the evaporation boat 21, and the groove width of the groove 211 gradually decreases from top to bottom. After the metal wire 100 is melted, it falls into the groove 211, ensuring that the molten metal is located in the middle of the groove 211, reducing the risk of sputtering caused by liquid level fluctuations. The boat body around the groove 211 forms a side wall 212 to prevent the molten metal from overflowing. Optionally, the groove 211 includes but is not limited to a conical or spherical shape, etc., to avoid heat concentration caused by edges and corners, which is conducive to uniform heating of the molten metal therein and reduces the risk of sputtering. Furthermore, the diameter of the conical groove 211 is 3 to 10 cm, so that the heating area of ​​the molten metal is large enough to improve the efficiency of evaporation. The height of the side wall 212 is 0.5 to 2 mm, which can increase the volume of the groove 211 to carry the molten metal and prevent the molten metal from overflowing due to overfilling. Exemplarily, the diameter of the conical groove 211 can be 4 cm, 5 cm, 6 cm, 7 cm, 8 cm, or 9 cm; the height of the side wall 212 can be 0.6 cm, 0.61 cm, 0.8 cm, 1.0 cm, 1.2 cm, 1.21 cm, 1.5 cm, 1.6 cm, 1.8 cm, 1.82 cm, 1.9 cm, etc.

[0050] To facilitate the installation between the evaporation carrier 2 and the evaporation chamber 1, the evaporation coating device also includes a mounting assembly 5 arranged in the evaporation chamber 1, and the mounting assembly 5 includes at least two mounting seats. The evaporation carrier 2 is fixed in a clamping space surrounded by at least two mounting seats, so that the evaporation carrier 2 can be stably clamped. The clamping distance of at least one mounting seat relative to other mounting seats is adjustable, thereby facilitating the installation of the evaporation carrier 2 and being suitable for evaporation carriers 2 of different sizes.

[0051] Specifically, a mounting arm 22 is provided on each side of the evaporation boat 21 provided in the present embodiment, and the mounting assembly 5 includes a first mounting seat 51 and a second mounting seat 52 arranged opposite to each other, and the evaporation carrier 2 is sandwiched between the first mounting seat 51 and the second mounting seat 52, so as to facilitate the installation of the evaporation carrier 2, and the first mounting seat 51 and the second mounting seat 52 are respectively used to carry the two mounting arms 22, and the spacing between the first mounting seat 51 and the second mounting seat 52 is adjustable, so that evaporation carriers 2 of different sizes can be installed. In the present embodiment, the mounting assembly 5 is made of high-temperature resistant metal or non-metallic material, such as Fe, Cu, high-temperature resistant ceramic material, etc., so as to avoid the mounting assembly 5 from being deformed by heat and affecting the stability of the installation of the evaporation carrier 2.

[0052] Furthermore, the mounting assembly 5 also includes an adjusting structure 53, at least one of the first mounting seat 51 and the second mounting seat 52 is connected to the cavity wall of the evaporation chamber 1 through the adjusting structure 53, the adjusting structure 53 includes a bearing portion 531, a connecting column 532 and an elastic member 533, one end of the connecting column 532 is connected to the cavity wall of the corresponding side of the evaporation chamber 1, the bearing portion 531 is slidably sleeved on the connecting column 532, the elastic member 533 is sleeved on the connecting column 532, and one end of the elastic member 533 abuts or is connected to the cavity wall of the evaporation chamber 1, and the other end abuts or is connected to the bearing portion 531, the bearing portion 531 is used to carry the evaporation carrier 2, when installing, first move the bearing portion 531 in the direction of compressing the elastic member 533, so as to facilitate the embedding of the mounting arm 22, after the external force is removed, the elastic member 533 is unfolded, so that the bearing portion 531 is pressed against the mounting arm 22, so as to realize the positioning of the evaporation carrier 2. The cross-sectional shape of the bearing portion 531 is L-shaped, which can provide bearing force to the mounting arm 22 while pressing against the mounting arm 22 .

[0053] like Figure 1 and Figure 2 As shown, the evaporation coating device also includes a protective cover 6, which is arranged in the evaporation chamber 1 and can be covered outside the laser heating head 32. The top of the protective cover 6 is provided with an avoidance opening 611 for avoiding the laser emitted by the laser heating head 32. The top of the protective cover 6 is in contact with the outer wall of the evaporation carrier 2, thereby isolating the laser heating head 32 from the metal vapor in the evaporation chamber 1 to prevent the metal vapor from contaminating or corroding the laser heating head 32.

[0054] In this embodiment, the protective cover 6 includes a top plate 61 and a surrounding plate 62. The surrounding plate 62 is vertically arranged in the evaporation chamber 1 and is arranged around the heating port 11 to prevent metal vapor from escaping from the heating port 11. The top plate 61 is connected to the top of the surrounding plate 62. The avoidance port 611 is opened on the top plate 61, so that the laser emitted by the laser heating head 32 can act on the bottom of the evaporation boat 21. The top plate 61 is supported on the bottom of the evaporation carrier 2, further improving the stability of the installation of the evaporation carrier 2.

[0055] In one embodiment, the top plate 61 is made of high temperature resistant ceramic material to prevent the top plate 61 from being deformed by heat due to laser radiation. In another embodiment, the enclosure 62 is made of metal material to improve the mechanical strength of the protective cover 6 and prevent the protective cover 6 from being damaged due to pressure or collision of the evaporation carrier 2.

[0056] In order to prevent the evaporation chamber 1 from deforming due to high temperature, the evaporation coating device also includes a cooling mechanism that can cool the cavity wall of the evaporation chamber 1. In this embodiment, the cooling mechanism includes a cooling pipeline embedded in the cavity wall of the evaporation chamber 1, and the cavity wall of the evaporation chamber 1 is cooled by passing a coolant into the cooling pipeline. The structure is simple and the cooling cost is low. Optionally, the cooling mechanism may also include but is not limited to a fan or a semiconductor refrigerator disposed outside the evaporation chamber 1, which is not specifically limited here.

[0057] Furthermore, an observation window is provided on the wall of the evaporation chamber 1 to facilitate operators to observe the internal state of the evaporation chamber 1 .

[0058] In order to improve the heating efficiency and uniformly heat the molten metal carried in the groove 211 to avoid the risk of sputtering caused by heat concentration, the laser heating component 3 adopts a surface laser heating component, and can adjust the heating area according to the area where the aluminum liquid is spread, which can reduce thermal radiation and energy consumption, and at the same time can reduce the damage of thermal radiation to the base film and improve the quality of the composite current collector. Among them, the surface laser heating component is a relatively mature technology in the prior art, and the specific structure of the surface laser heating component is not repeated in this embodiment.

[0059] This embodiment also provides a battery production line, including a composite current collector collecting device and the above-mentioned evaporation coating device. The composite current collector collecting device is used to collect the base film coated with a metal layer processed by the evaporation coating device, that is, to obtain a composite current collector. By applying the evaporation coating device, the film formation quality and production efficiency of the composite current collector are improved.

[0060] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An evaporation coating device for evaporating metal onto the surface of a base film, characterized in that: The evaporation coating device comprises: An evaporation chamber (1), wherein a heating port (11) is provided at the bottom of the evaporation chamber (1); an evaporation carrier (2), the evaporation carrier (2) being arranged in the evaporation chamber (1); A laser heating assembly (3), comprising a laser generator (31) and a laser heating head (32), wherein the laser heating head (32) passes through the heating port (11) and is used to heat the evaporation carrier (2); A wire feeding mechanism (4) is used to feed a metal wire (100) onto or above the evaporation carrier (2); the metal wire (100) is used to melt under the heating action of the laser heating head (32) and form molten metal liquid in the evaporation carrier (2); the metal liquid is evaporated by the heat to form metal vapor and settles onto the base film to form a metal coating.

2. The evaporation coating device according to claim 1, characterized in that: The evaporation carrier (2) comprises an evaporation boat (21) and a mounting arm (22) connected to the evaporation boat (21), and the mounting arm (22) is connected to the inner wall of the evaporation chamber (1).

3. The evaporation coating device according to claim 1, characterized in that: The evaporation carrier (2) is provided with a groove (211), and the groove width of the groove (211) gradually decreases from top to bottom.

4. The evaporation coating device according to claim 1, characterized in that: The evaporation coating device further comprises a mounting assembly (5) arranged in the evaporation chamber (1), the mounting assembly (5) comprising at least two mounting seats, the evaporation carrier (2) being fixed in a clamping space surrounded by at least two of the mounting seats, and the clamping distance of at least one of the mounting seats relative to the other mounting seats being adjustable.

5. The evaporation coating device according to claim 4, characterized in that: The mounting assembly (5) comprises a first mounting seat (51) and a second mounting seat (52) which are arranged opposite to each other, the evaporation carrier (2) is clamped between the first mounting seat (51) and the second mounting seat (52), and the distance between the first mounting seat (51) and the second mounting seat (52) is adjustable.

6. The evaporation coating device according to claim 5, characterized in that: The mounting assembly (5) further comprises an adjustment structure (53), wherein at least one of the first mounting seat (51) and the second mounting seat (52) is connected to the cavity wall of the evaporation chamber (1) via the adjustment structure (53), and the adjustment structure (53) comprises a bearing portion (531), a connecting column (532) and an elastic member (533), wherein one end of the connecting column (532) is connected to the cavity wall of the corresponding side of the evaporation chamber (1), the bearing portion (531) is slidably mounted on the connecting column (532), the elastic member (533) is mounted on the connecting column (532), and one end of the elastic member (533) abuts against or is connected to the cavity wall of the evaporation chamber (1), and the other end abuts against or is connected to the bearing portion (531), and the bearing portion (531) is used for carrying the evaporation carrier (2).

7. The evaporation coating device according to claim 1, characterized in that: The evaporation coating device also includes a protective cover (6), which is arranged in the evaporation chamber (1) and can be covered outside the laser heating head (32), and the top of the protective cover (6) is provided with an escape opening (611) for avoiding the laser emitted by the laser heating head (32), and the top of the protective cover (6) is in contact with the outer wall of the evaporation carrier (2).

8. The evaporation coating device according to claim 7, characterized in that: The protective cover (6) comprises a top plate (61) and a surrounding plate (62); the surrounding plate (62) is vertically arranged in the evaporation chamber (1) and is arranged around the heating port (11); the top plate (61) is connected to the top of the surrounding plate (62); the avoidance port (611) is opened on the top plate (61); and the top plate (61) is used to support the bottom of the evaporation carrier (2).

9. The evaporation coating device according to any one of claims 1 to 8, characterized in that: The evaporation coating device further comprises a cooling mechanism, which is used to cool the cavity wall of the evaporation chamber (1).

10. A battery production line, characterized in that: It comprises a collecting device and the evaporation coating device according to any one of claims 1 to 9, wherein the collecting device is used to collect the base film coated with the metal layer processed by the evaporation coating device.

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