A method for manufacturing an electrochromic device

Abstract

The application provides a preparation method of an electrochromic device, and relates to the technical field of photoelectricity. The preparation method of the electrochromic device provided by the application comprises the following steps: pasting an isolation film at a preset position of an electrode glass, wherein the isolation film is arranged in a ring shape; pasting a frame glue around the isolation film at the outer periphery of the isolation film; dropping an electrochromic solution on the inner side of the isolation film to obtain a first device; pasting a conductive glass on the first device to obtain a second device; heating the second device to solidify the frame glue; and performing a slitting treatment on the second device to obtain the electrochromic device. The preparation method of the electrochromic device can effectively prevent the solution inside and outside the polymer film from contacting each other in the production process, improves the product quality and reliability, and improves the production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photoelectric technology, in particular to a preparation method of an electrochromic device. BACKGROUND

[0002] Electrochromism refers to a phenomenon that the optical properties of a material change stably and reversibly in color under the action of an applied electric field, which is manifested as reversible changes in color and transparency. Electrochromic devices that have been industrialized include electrochromic intelligent light-adjusting glass and automatic anti-dazzling rearview mirrors for automobiles.

[0003] The existing preparation methods of electrochromic devices are often vacuum liquid filling preparation methods or ODF lamination processes. However, in the prior art, the vacuum liquid filling preparation method uses one-out-one-filling liquid, which has high alignment accuracy requirements, low production efficiency, and unattractive solidification at the sealing position. When the ODF lamination process is used, one-out-multiple products can be produced, and the problem of unattractive solidification at the sealing position can be solved. However, the frame glue and the EC color-changing solution infiltrate each other during the production process, reducing the performance of the product. SUMMARY

[0004] The present application provides a preparation method of an electrochromic device, which aims to solve the problem of mutual infiltration of frame glue and electrochromic solution during the production process in the prior art, which reduces the performance of the product.

[0005] The embodiments of the present application are implemented as follows:

[0006] In one aspect of the embodiments of the present application, a preparation method of an electrochromic device is provided, which includes:

[0007] The insulating film is attached at a predetermined position of the electrode glass, and the insulating film is arranged in a ring shape;

[0008] The frame glue is dotted around the insulating film on the outer periphery of the insulating film;

[0009] The electrochromic solution is dripped on the inner side of the insulating film to obtain a first device;

[0010] The conductive glass is laminated on the first device to obtain a second device;

[0011] The second device is heated to solidify the frame glue;

[0012] The second device is subjected to a slitting process to obtain an electrochromic device.

[0013] Optionally, the insulating film is prepared by the following method:

[0014] A high molecular film is provided;

[0015] Double-sided adhesive tapes are attached to opposite sides of the high molecular film;

[0016] The release film is attached on the double-sided adhesive tape, and is pressed and flattened;

[0017] The polymer film after being pressed and flattened is subjected to edge cutting treatment to obtain the insulation film.

[0018] Optionally, the edge cutting treatment is any one of laser cutting and stamping.

[0019] Optionally, the thickness of the polymer film is between 0.02 mm and 0.15 mm.

[0020] Optionally, the material of the polymer film is any one of polypropylene, polyethylene terephthalate and nylon.

[0021] Optionally, the adhesive of the double-sided adhesive tape is black; and / or, the thickness of the double-sided adhesive tape is between 0.01 mm and 0.1 mm.

[0022] Optionally, the electrode glass is soda-lime glass, and the soda-lime glass is sequentially coated with a primer layer, a conductive layer and a metal layer.

[0023] Optionally, the primer layer of the electrode glass is made of silica material; and / or, the conductive layer is made of copper material.

[0024] Optionally, the metal layer is a stack, and the stack comprises a nickel layer, a palladium layer and a gold layer formed on the conductive layer in sequence.

[0025] Optionally, the metal layer further has an indium tin oxide layer formed on the side away from the conductive layer.

[0026] The preparation method of the electrochromic device provided by the embodiment has the following beneficial effects: the preparation method of the electrochromic device provided by the embodiment comprises the following steps: attaching the insulation film on the preset position of the electrode glass, the insulation film is arranged in a ring shape, through the arrangement of the insulation film, the insulation film can be firmly attached to the electrode glass and isolate the different materials on both sides of the insulation film, thereby improving the performance of the product; the frame adhesive is applied around the insulation film, through the arrangement of the frame adhesive, the upper and lower two pieces of electrode glass can be bonded together, and the electrochromic solution is sealed between the two glasses, so that the electrochromic solution does not contact with the water and oxygen in the outside world; the electrochromic solution is dropped on the inner side of the insulation film to obtain a first device, through the dropping of the electrochromic solution on the inner side of the insulation film, the inner side of the insulation film can be filled with a certain amount of the electrochromic solution, which is used for color changing when power is applied, so that the color changing process of the electrochromic device is more reliable and efficient; the conductive glass is attached on the first device to obtain a second device; the second device is heated to solidify the frame adhesive, so that the first device and the second device are tightly attached together; the second device is subjected to slitting treatment to obtain the electrochromic device. The preparation method of the electrochromic device obtained by the above design can effectively block the contact between the solutions inside and outside the polymer film in the production process, thereby improving the product quality and reliability and improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0028] Figure 1 Structure diagram of the electrochromic device provided by the embodiments of the present application;

[0029] Figure 2 Flow chart of the preparation method of the electrochromic device provided by the embodiments of the present application;

[0030] Figure 3 Flow chart of the preparation method of the insulating film of the electrochromic device provided by the embodiments of the present application.

[0031] Figure legend: 100-electrochromic device; 110-insulating film; 120-frame adhesive; 130-electrochromic solution; 140-electrode glass; 150-undercoat layer; 160-conductive layer; 170-metal layer; 180-indium tin oxide layer. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0034] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0035] In this application, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Please refer to Figure 2 In one aspect of the embodiment of the present application, a preparation method of an electrochromic device 100 is provided, comprising:

[0037] S100, the insulating film 110 is attached to the preset position of the electrode glass 140, and the insulating film 110 is arranged in a ring shape;

[0038] S200, the frame glue 120 is dotted around the insulating film 110 outside the insulating film 110;

[0039] S300, the electrochromic solution 130 is dripped on the inner side of the insulating film 110 to obtain a first device;

[0040] S400, the conductive glass is attached to the first device to obtain a second device;

[0041] S500, the second device is heated to solidify the frame glue 120;

[0042] S600, the second device is cut to obtain the electrochromic device 100.

[0043] Specifically, in the preparation method of the electrochromic device 100, the insulating film 110 is attached to the preset position of the electrode glass 140, and the frame glue 120 is dotted around the insulating film 110 outside the insulating film 110, and the electrochromic solution 130 is dripped on the inner side of the insulating film 110, the insulating film 110 is used to isolate the frame glue 120 and the electrochromic solution 130 on the left and right sides, to obtain a first device; then the conductive glass is attached to the first device, and heated to solidify the frame glue 120, so that the first device is bonded with the conductive glass to obtain a second device; then, the solidified second device is cut, and the electrochromic device 100 is obtained.

[0044] It should be noted that first, in the embodiment of the present application, the insulating film 110 is attached to the preset position of the electrode glass 140, and the insulating film 110 is a whole film material with double-sided adhesive tape attached to both sides of the high molecular film, and release film attached to both sides, and pressed and flattened. The specific preparation method of the insulating film 110 will be explained below.

[0045] Secondly, in the embodiment of the present application, the frame glue 120 is applied around the outer periphery of the insulation film 110. Such arrangement can serve as a sealing material to enable the electrode glass 140 and the conductive glass to be well bonded, and the electrochromic solution 130 is sealed between the two glasses to prevent it from contacting water and oxygen from the outside. The electrochromic solution 130 has good storage stability and coating processing performance, and can provide stability for the electrochromic device 100.

[0046] The preparation method of the electrochromic device 100 provided by the embodiment of the present application includes the following steps: applying the insulation film 110 at a predetermined position of the electrode glass 140, the insulation film 110 is arranged in a ring shape. Through the arrangement of the insulation film 110, the insulation film 110 can be firmly attached to the electrode glass 140 and isolate the different materials on both sides of the insulation film 110, thereby improving the performance of the product; applying the frame glue 120 around the outer periphery of the insulation film 110. Through the arrangement of the frame glue 120, the upper and lower electrode glasses 140 can be bonded, and the electrochromic solution 130 is sealed between the two glasses to prevent it from contacting water and oxygen from the outside; dropping the electrochromic solution 130 on the inner side of the insulation film 110 to obtain a first device. Through the dropping of the electrochromic solution 130 on the inner side of the insulation film 110, the inner side of the insulation film 110 can be filled with a certain amount of electrochromic solution, which can be used for color changing when power is applied, thereby making the color changing process of the electrochromic device more reliable and efficient; attaching the conductive glass to the first device to obtain a second device; heating the second device to solidify the frame glue 120, so that the first device and the second device are tightly attached together; and cutting the second device to obtain the electrochromic device 100. The preparation method of the electrochromic device 100 obtained by the above design can effectively prevent the solutions inside and outside the polymer film from contacting during the production process, thereby improving the product quality and reliability and improving the production efficiency.

[0047] In an implementable embodiment of the present application, as shown in Figure 3 The insulation film 110 mentioned above can be prepared by the following method:

[0048] S110, providing a polymer film;

[0049] S120, attaching double-sided adhesive tapes on opposite sides of the polymer film respectively;

[0050] S130, attaching a release film on the double-sided adhesive tapes and performing pressing and flattening;

[0051] S140, cutting the edges of the polymer film after pressing and flattening to obtain the insulation film 110.

[0052] Specifically, the isolation film 110 is a film material composed of a high polymer film, double-sided adhesive tape, and release film; the double-sided adhesive tape is attached to the opposite sides of the high polymer film to fix the high polymer film; the release film is attached to the double-sided adhesive tape and is pressed and flattened to protect the high polymer film; the obtained film material is subjected to edge cutting to become a target shape, i.e., the isolation film 110.

[0053] By attaching the double-sided adhesive tape to the opposite sides of the high polymer film, the position of the high polymer film is fixed, thereby improving the efficiency of the subsequent process of isolating different materials on the two sides; the release film is attached to the double-sided adhesive tape, which can protect the high polymer film on both sides; the high polymer film after pressing and flattening is subjected to edge cutting, and finally matches the shape of the isolation film required by the electrochromic device 100, to obtain the target shape of the isolation film.

[0054] In an implementable embodiment of the present application, the edge cutting process is any one of laser cutting and stamping.

[0055] Specifically, the isolation film 110 is subjected to laser cutting or stamping to obtain a target shape that matches the electrochromic device 100.

[0056] Laser cutting is the most widely used processing technology, and its principle is that the laser is focused and irradiated onto the material to make the material temperature rise to melting or gasification, and a cutting seam is formed on the cutting material to achieve the cutting purpose with the relative movement of the laser and the material. It has many advantages, such as high precision, narrow cutting seam, smooth cutting surface, fast speed, good quality, no damage, and not affected by material properties, etc.

[0057] The edge cutting method of stamping is a high-efficiency and low-consumption processing technology, which has the advantages of convenient operation process, easy organization of production, and high dimensional accuracy.

[0058] By laser cutting or stamping on the obtained isolation film 110, the precision and quality of the isolation film 110 can be improved, and the isolation film 110 is not easily damaged during cutting, thereby obtaining the isolation film 110 that meets the target shape.

[0059] Specifically, the thickness of the high polymer film is between 0.02mm and 0.15mm.

[0060] Specifically, the high polymer film is arranged on both sides of the electrode glass 140, and the thickness of the high polymer film is between 0.02mm and 0.15mm.

[0061] By setting the thickness of the polymer film, the material separation function of the polymer film can be well maintained, and the stability of the polymer film is also ensured, so that the use process of the electrochromic device 100 is more efficient and reliable.

[0062] For example, the material of the polymer film is any one of polypropylene, polyethylene terephthalate and nylon.

[0063] Specifically, the polymer film is a semi-permeable film made of a polymer material. Such a semi-permeable film uses pressure difference, temperature gradient, concentration gradient or potential difference as power to separate gas mixture, liquid mixture or solution of organic matter and inorganic matter, and has the characteristics of energy saving, high efficiency and cleanliness. The polymer film material in the embodiment of the application is any one of polypropylene, polyethylene terephthalate or nylon.

[0064] By selecting the polymer film material, the use reliability of the polymer film can be improved by the performance of the polymer film of different materials, so as to better realize the isolation and separation of the solutions on both sides.

[0065] In an implementable embodiment of the application, the adhesive of the double-sided adhesive tape is black; and / or, the thickness of the double-sided adhesive tape is between 0.01 mm and 0.1 mm.

[0066] Specifically, the double-sided adhesive tape is attached to both sides of the electrode glass 140, the adhesive of the double-sided adhesive tape is black, and the thickness thereof is between 0.01 mm and 0.1 mm.

[0067] By making the adhesive of the double-sided adhesive tape black, the hiding power is better, and the black color is similar to the color of the frame adhesive 120, so that the phenomenon of fault is not easy to appear, and it is more beautiful; the thickness of the double-sided adhesive tape between 0.01 mm and 0.1 mm can better attach to the electrode glass 140.

[0068] It should be noted that in addition to black, the adhesive color of the double-sided adhesive tape can also be other dark colors, such as dark gray, brown, etc., as long as it has a certain hiding power to make the attachment more beautiful and simple.

[0069] For example, as shown in Figure 1 The electrode glass 140 is soda-lime glass, and the soda-lime glass is sequentially coated with a primer layer 150, a conductive layer 160 and a metal layer 170.

[0070] Specifically, the soda-lime glass is one of silicate glasses, mainly composed of silicon dioxide, calcium oxide and sodium oxide, etc. The main role of calcium oxide in the glass is to increase the chemical stability and mechanical strength of the glass; the soda-lime glass is sequentially coated with a primer layer 150, a conductive layer 160 and a metal layer 170.

[0071] The adoption of the soda-lime glass as the electrode glass 140 increases the stability and strength of the electrode glass 140, and makes the electrochromic device 100 more stable and reliable. The primer layer 150, the conductive layer 160 and the metal layer 170 are sequentially plated on the soda-lime glass, which improves the conductivity and makes the conductive process more efficient.

[0072] As shown in Figure 1 the primer layer 150 of the electrode glass 140 is made of silica material; and / or, the conductive layer 160 is made of copper material.

[0073] Specifically, the primer layer 150 is attached to the inner side of the entire electrode glass 140. Silica, as an acidic oxide, has stable chemical properties and can absorb moisture. When attached to the electrode glass 140, it can provide certain protection to the glass. The conductive layer 160 is disposed above the primer layer 150 and is made of copper material. Copper is a non-ferrous metal that is closely related to human beings. It has the characteristics of low cost and long service life, and also has good conductivity, thermal conductivity and ductility.

[0074] By setting the primer layer 150 of the electrode glass 140 to be made of silica material, the electrode glass 140 can be well protected from reacting with external water or air, which improves the stability and reliability of the electrochromic device 100 to some extent. By setting the conductive layer 160 to be made of copper material, the conductive process can be more efficient, which improves the reliability of the electrochromic device 100 and also reduces the production cost.

[0075] In an implementable embodiment of the present application, as shown in Figure 1 the metal layer 170 is a stack, and the stack includes a nickel layer, a palladium layer and a gold layer formed on the conductive layer 160 in sequence.

[0076] Specifically, the metal layer 170 is disposed on the conductive layer 160 by electrochemical deposition, and the metal layer 170 includes a nickel layer, a palladium layer and a gold layer in sequence. Nickel is a metal that is hard and ductile and has ferromagnetic properties. It can be highly polished and resistant to corrosion, and can conduct electricity and heat. Palladium is soft and has good ductility and plasticity. It can be forged, calendered and drawn. It has excellent electrical conductivity, stability and thermal conductivity. Gold has good electrical conductivity, i.e. thermal conductivity, and its chemical properties are stable and not prone to chemical reactions with other elements.

[0077] By disposing the metal layer 170 on the conductive layer 160, the combination of these metals can further improve the electrical conductivity of the electrochromic device 100, and make the electrochromic device 100 more stable during the conductive process, thereby improving the stability and reliability of the electrochromic device 100.

[0078] In one implementation of the present application, as shown in Figure 1 The metal layer 170 is also provided with an indium tin oxide layer 180 on the side facing away from the conductive layer 160.

[0079] Specifically, a layer of indium tin oxide is also provided on the side facing away from the conductive layer 160, and the separation film 110 is attached to the indium tin oxide layer 180. Indium tin oxide is a substitutional solid solution, and its main characteristic is the combination of electrical conduction and optical transparency. Indium oxide has high transmittance, tin oxide has strong conductivity, and indium tin oxide has strong water absorption, which can further improve the conductivity of the electrochromic device 100, and make the electrochromic device 100 more stable during the conduction process, thereby improving the stability and reliability of the electrochromic device 100.

[0080] The above only describes the embodiments of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for fabricating an electrochromic device, characterized in that, include: An insulating film is applied to a predetermined position on the electrode glass, and the insulating film is arranged in a ring. Apply edge adhesive around the outer periphery of the insulating membrane; An electrochromic solution is dropped into the inner side of the insulating membrane to obtain a first device; A conductive glass is attached to the first device to obtain a second device; The second device is heated to cure the frame adhesive; The second device is cut into pieces to obtain an electrochromic device.

2. The method for preparing the electrochromic device according to claim 1, characterized in that, The insulating membrane is prepared by the following method: Provide polymer membranes; Double-sided adhesive tape is applied to both sides of the polymer film. A release film is applied to the double-sided adhesive, and then pressed and smoothed. The polymer film, after being pressed and leveled, is trimmed to obtain a barrier film.

3. The method for preparing the electrochromic device according to claim 2, characterized in that, The trimming process can be either laser cutting or stamping.

4. The method for preparing the electrochromic device according to claim 2, characterized in that, The thickness of the polymer film is between 0.02 mm and 0.15 mm.

5. The method for preparing the electrochromic device according to claim 2, characterized in that, The polymer membrane is made of any one of polypropylene, polyethylene terephthalate, and nylon.

6. The method for preparing the electrochromic device according to claim 2, characterized in that, The adhesive of the double-sided tape is black; and / or, the thickness of the double-sided tape is between 0.01 mm and 0.1 mm.

7. The method for preparing the electrochromic device according to claim 1, characterized in that, The electrode glass is soda-lime glass, and the soda-lime glass is sequentially coated with an underlayer, a conductive layer, and a metal layer.

8. The method for preparing the electrochromic device according to claim 7, characterized in that, The electrode glass substrate is made of silicon dioxide; and / or the conductive layer is made of copper.

9. The method for preparing the electrochromic device according to claim 7, characterized in that, The metal layer is a stack, and the stack includes a nickel layer, a palladium layer and a gold layer formed sequentially on the conductive layer.

10. The method for preparing the electrochromic device according to claim 7, characterized in that, An indium tin oxide layer is also formed on the side of the metal layer opposite to the conductive layer.

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