Smart glass assembly and preparation method therefor, and vehicle

Abstract

A smart glass assembly and a preparation method therefor, and a vehicle. Anode glass and cathode glass are spaced apart; a bonding portion is arranged between the cathode glass and the anode glass, and is in the shape of a ring with a gap, and the gap forms a liquid injection channel; the bonding portion, the cathode glass and the anode glass enclose a liquid injection cavity; a color-changing liquid is accommodated in the liquid injection cavity; a sealing portion is contained in the liquid injection channel to seal the liquid injection cavity; and the width of the region of the liquid injection channel that is close to the liquid injection cavity is greater than that of the middle region of the liquid injection channel.

Description

Dimming glass assembly, preparation method thereof, and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202410185697.8 and application date of February 19, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application by introduction. Technical Field

[0003] The present application relates to the field of electrochromism, and in particular to a dimming glass assembly, a preparation method thereof, and a vehicle. Background Art

[0004] In the production of electrochromic devices, it is very important to ensure that there are no impurities, because the introduction of impurities in the system will cause side reactions in the electrochromic redox process, thereby reducing the service life and user experience of the electrochromic device. It is also necessary to ensure that the rearview mirror products in the finished stage also need to have a certain resistance to external liquids and environmental factors such as high temperature and high pressure difference.

[0005] The traditional sealing method involves applying adhesive directly to the sealant, allowing gravity to penetrate the gap left by the frame glue to complete the seal. However, current adhesives can easily loosen or even fall off, causing the internal color-changing liquid to leak, affecting both usability and aesthetics.

[0006] Public content

[0007] The purpose of this application is to provide a dimming glass assembly, a preparation method thereof, and a vehicle to solve the problem of color-changing liquid leakage caused by adhesive shedding.

[0008] To achieve the purpose of this application, this application provides the following technical solutions:

[0009] In a first aspect, the present application provides a switchable glass assembly, comprising:

[0010] cathode glass;

[0011] Anode glass, spaced apart from the cathode glass;

[0012] A bonding portion is provided between the cathode glass and the anode glass, the bonding portion is annular with a gap, the gap forms a liquid injection channel, and the bonding portion, the cathode glass, and the anode glass enclose a liquid injection cavity;

[0013] Color-changing liquid, contained in the liquid injection cavity;

[0014] a sealing portion, received in the injection channel to seal the injection cavity;

[0015] Wherein, the width of the area of ​​the injection channel close to the injection cavity is greater than the width of the middle area of ​​the injection channel.

[0016] In some embodiments, the width of the injection channel in a region away from the injection cavity is greater than the width of the middle region of the injection channel.

[0017] In some embodiments, the bonding portion has a first end face and a second end face, the first end face and the second end face are opposite and spaced apart, the gap between the first end face and the second end face forms the injection channel, and at least one of the first end face and the second end face is a smooth curved surface.

[0018] In some embodiments, the first end surface and the second end surface are both curved surfaces with the middle portion being convex compared to the surrounding portions.

[0019] In some embodiments, the adhesive portion has a larger dimension in the first direction than in the second direction, the adhesive portion has the injection channel at a vertex in the first direction, and the first direction intersects with the second direction.

[0020] In some embodiments, the cathode glass, the anode glass, and the bonding portion are adapted in shape.

[0021] In some embodiments, the intersection of any two sides of the cathode glass is smoothly connected.

[0022] In a second aspect, the present application provides a method for preparing a switchable glass assembly, comprising the following steps:

[0023] Provide cathode glass and anode glass;

[0024] Providing adhesive to form a bonding portion, the bonding portion is disposed between the cathode glass and the anode glass, the bonding portion is annular with a gap, the gap forming a liquid injection channel, and the bonding portion, the cathode glass, and the anode glass enclose a liquid injection cavity;

[0025] Providing a color-changing liquid and injecting it into the liquid injection cavity;

[0026] The adhesive is injected into the liquid injection channel, and the adhesive is solidified to form a sealing portion.

[0027] In some embodiments, injecting the adhesive into the injection channel and solidifying the adhesive to form a sealing portion comprises:

[0028] forming a negative pressure in the liquid injection cavity;

[0029] The adhesive fills the liquid injection channel under the action of the negative pressure;

[0030] The adhesive is cured to form the seal.

[0031] In some embodiments, it further includes:

[0032] The sealing portion is trimmed until the outer wall surface of the sealing portion is smoothly connected to the outer wall surface of the bonding portion.

[0033] In some embodiments, the viscosity of the viscose is a, satisfying: 1000 mPa·s≤a≤10000 mPa·s; the pressure difference between the negative pressure and the standard atmospheric pressure is Δ, satisfying: 50 Pa≤Δ≤270 Pa.

[0034] In some embodiments, the water content of the color-changing liquid is b, satisfying: b≤300 ppm; the oxygen content of the color-changing liquid is c, satisfying: c≤100 ppm.

[0035] In some embodiments, the temperature of the preparation environment of the dimming glass assembly is d, which satisfies: 21°C ≤ d ≤ 25°C; the relative humidity of the preparation environment of the dimming glass assembly is e, which satisfies: 30% ≤ e ≤ 40%; the cleanliness level of the preparation environment of the dimming glass assembly is N, which satisfies: N ≤ 4, wherein the test standard for the cleanliness level is GB 50073.

[0036] In a third aspect, the present application provides a vehicle, comprising the smart glass assembly described in any one of the first aspects, or a smart glass assembly prepared by the preparation method of the smart glass assembly described in any one of the second aspects.

[0037] The bonding portion of the smart glass assembly of the present application is provided with a liquid injection channel, and the smart glass assembly is also provided with a sealing portion to close the liquid injection cavity, and the width of the area of ​​the liquid injection channel close to the liquid injection cavity is greater than the width of the middle area of ​​the liquid injection channel, so that the sealing portion and the liquid injection channel form a snap-on structure. The change in the width of the liquid injection channel enables the smart glass assembly to be subjected to high temperature or external high pressure or extrusion, which drives the internal and external pressures of the seal to be inconsistent. The sealing portion can effectively protect the color-changing liquid inside the smart glass assembly and effectively prevent the displacement of the sealing portion. The sealing portion is not easy to fall off, thereby ensuring that there will be no leakage of color-changing liquid at the liquid injection channel, thereby extending the stability and service life of the smart glass assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 these drawings without paying any creative work.

[0039] FIG1 is a front view of a switchable glass assembly according to an embodiment;

[0040] FIG2 is a cross-sectional view of a switchable glass assembly according to an embodiment;

[0041] FIG3 is a partial structural diagram of a switchable glass assembly according to an embodiment;

[0042] FIG4 is a front view of a cathode glass according to an embodiment;

[0043] FIG5 is a front view of an anode glass according to an embodiment;

[0044] FIG6 is a flow chart of a method for preparing a switchable glass assembly according to an embodiment;

[0045] FIG. 7 is a block diagram of a vehicle according to an embodiment.

[0046] Description of reference numerals:

[0047] 100 - dimming glass assembly, 10 - cathode glass, 11 - cathode reflective portion, 12 - cathode transparent portion, 20 - anode glass, 21 - anode transparent portion, 22 - anode shielding portion, 30 - bonding portion, 31 - liquid injection channel, 311 - first end face, 312 - second end face, 40 - liquid injection cavity, X - first direction, Y - second direction, Z - ground. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be an intermediate component.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used in this application includes any and all combinations of one or more of the relevant listed items.

[0051] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0052] With reference to Figures 1, 2, and 3, wherein Figure 3 is a partial enlarged view of A in Figure 1, the present application provides a dimming glass assembly 100, comprising a cathode glass 10, an anode glass 20, an adhesive portion 30, a color-changing liquid, and a sealing portion. The anode glass 20 is spaced apart from the cathode glass 10. The adhesive portion 30 is disposed between the cathode glass 10 and the anode glass 20. The adhesive portion 30 is annular with a gap, and the gap forms an injection channel 31. The adhesive portion 30, the cathode glass 10, and the anode glass 20 enclose a liquid injection cavity 40. The color-changing liquid is contained in the liquid injection cavity 40. The sealing portion is contained in the liquid injection cavity 40 to close the liquid injection cavity 40. The width of the liquid injection cavity 31 in the area close to the liquid injection cavity 40 is greater than the width of the middle area of ​​the liquid injection cavity 31.

[0053] The cathode glass 10 is a glass coated with a material such as a metal oxide, nitride or fluoride and made conductive by electron beam or ion beam bombardment. Specific coating materials may be barium oxide, strontium oxide, silicon nitride, titanium nitride, barium fluoride, strontium fluoride, etc.

[0054] The anode glass 20 is a glass having conductive properties by coating a layer of metal oxide or other conductive material on the glass surface and forming a conductive film layer after high-temperature sintering. The specific coating material may be indium tin oxide (ITO).

[0055] The bonding portion 30 is formed by curing adhesive, which can be either a light-curing adhesive or a thermosetting adhesive.

[0056] The cross-sectional shape of the injection channel 31 can be dumbbell-shaped, spindle-shaped, hexagonal, etc. The shape of the sealing portion is set corresponding to the injection channel 31, so that the sealing portion is not easy to move after filling the injection channel 31 and has certain physical support.

[0057] The switchable glass assembly 100 can be used for automobile rearview mirrors, home glass, commercial partitions, architectural decoration, etc. without limitation.

[0058] The color-changing liquid is a photosensitive material that changes color under different lighting conditions. The photosensitive material senses the intensity and angle of light and then changes its color and reflectivity, darkening the mirror surface and reducing the reflection of strong light. When the strong light disappears, the color-changing liquid gradually returns to its original color, and the mirror surface gradually returns to its original reflectivity.

[0059] The adhesive portion 30 of the smart glass assembly 100 of the present application is provided with a liquid injection channel 31, and the smart glass assembly 100 is also provided with a sealing portion to close the liquid injection cavity 40, and the width of the area of ​​the liquid injection channel 31 close to the liquid injection cavity 40 is greater than the width of the middle area of ​​the liquid injection channel 31, so that the sealing portion and the liquid injection channel 31 form a snap-fit ​​structure. The change in the width of the liquid injection channel 31 enables the smart glass assembly 100 to be subjected to high temperature or external high pressure or extrusion, which drives the internal and external pressures of the seal to be inconsistent. The sealing portion can effectively protect the color-changing liquid inside the smart glass assembly 100, effectively prevent the displacement of the sealing portion, and ensure that there will be no leakage of color-changing liquid at the liquid injection channel 31, thereby extending the stability and service life of the smart glass assembly 100.

[0060] With reference to FIG. 3 , in some embodiments, the width of the region of the injection channel 31 away from the injection cavity 40 is greater than the width of the middle region of the injection channel 31 .

[0061] The width of the areas at both ends of the injection channel 31 is greater than the width of the middle area, so that the injection channel 31 as a whole is dumbbell-shaped or spindle-shaped, so that the straight line structure of the inner edge of the sealing part is not easy to extend to the front observation area of ​​the dimming glass assembly 100, and will not affect the appearance and normal color change use of the dimming glass assembly 100.

[0062] Moreover, the dumbbell-shaped or spindle-shaped structure can effectively protect the color-changing liquid inside the dimming glass assembly 100, and ensure that no color-changing liquid leaks out of the injection channel 31 when the internal and external pressures of the seal are inconsistent due to high temperature, external high pressure, or extrusion. Because this shape forms a snap-fit ​​structure, it can effectively prevent the displacement of the sealing part, strengthen its structure from the level of physical properties, thereby extending the stability and service life of the dimming glass assembly 100.

[0063] Referring to Figure 3, in some embodiments, the bonding portion 30 has a first end face 311 and a second end face 312, the first end face 311 and the second end face 312 are opposite to each other and spaced apart, the gap between the first end face 311 and the second end face 312 forms an injection channel 31, and at least one of the first end face 311 and the second end face 312 is a smooth curved surface.

[0064] The first end surface 311 and the second end surface 312 are smooth curved surfaces for easy operation, so that the sealing portion can fully fill the injection channel 31 and avoid a gap between the injection channel 31 and the sealing portion, thereby allowing the color-changing liquid to seep out of the sealing portion.

[0065] In some embodiments, both the first end surface 311 and the second end surface 312 are curved surfaces with their central portions convex relative to the surrounding areas. This allows the liquid injection channel 31 to assume an overall dumbbell shape, making it difficult for the sealing portion to separate from the liquid injection channel 31. This improves the sealing performance of the switchable glass assembly 100, prevents leakage of the color-changing liquid, and extends the stability and service life of the switchable glass assembly 100. Furthermore, the curved shapes of the first and second end surfaces 311, 312 facilitate the sealing portion's entry into the liquid injection channel 31 to complete the filling process.

[0066] 1 , in some embodiments, the bonding portion 30 has a larger dimension in the first direction X than in the second direction Y. The bonding portion 30 has a liquid injection channel 31 at its vertex in the first direction X, and the first direction X and the second direction Y intersect.

[0067] As shown in FIG1 , Z is the ground. During use, the side of the switchable glass assembly 100 extending along the first direction X is parallel to the ground Z. During the preparation process, the side of the switchable glass assembly 100 extending along the first direction X forms an angle with the ground Z. Optionally, during the preparation process, the first direction X is perpendicular to the ground Z.

[0068] The injection channel 31 is disposed at the vertex of the adhesive portion 30 in the first direction X, so that the left and right sides of the injection channel 31 of the switchable glass assembly 100 remain uniformly submerged during the injection process, thereby preventing any gaps from leaking out of the liquid surface. This reduces the probability of introducing pressurized gas, ensures water and oxygen isolation during the injection process, and improves the subsequent color change stability of the switchable glass assembly 100.

[0069] In some embodiments, the shapes of the cathode glass 10 , the anode glass 20 and the bonding portion 30 are adapted to each other.

[0070] The shape of the cathode glass 10 can be rectangular, trapezoidal, parallelogram, etc., without limitation. The shapes of the anode glass 20 and the adhesive portion 30 are configured to correspond to the cathode glass 10. Specifically, the shape of the dimming glass assembly 100 is an axisymmetric pattern.

[0071] With reference to Figures 4 and 5 , in some embodiments, the cathode glass 10 includes a cathode reflective portion 11 and a cathode transparent portion 12, with the cathode transparent portion 12 surrounding the cathode reflective portion 11. The anode glass 20 includes an anode transparent portion 21 and an anode shielding portion 22, with the anode shielding portion 22 surrounding the anode transparent portion 21. The orthographic projection of the cathode glass 10 on the anode glass 20 is located within the anode transparent portion 21. The cathode reflective portion 11 is an area coated with a metal oxide or other conductive material, which is used to conduct electricity and reflect light. The cathode transparent portion 12 is a transparent area not coated with a conductive material, allowing light to pass through, and is typically used to provide an observation window. The anode transparent portion 21 is a transparent area not coated with a conductive material, which is typically used to manufacture a transparent conductive film or window. The anode shielding portion 22 is a shielding area coated with a metal oxide or other conductive material, which is used to block light and current.

[0072] The orthographic projection of the bonding portion 30 on the anode glass 20 is located at the anode transparent portion 21 , and the orthographic projection of the cathode reflective portion 11 on the anode glass 20 is located within the bonding portion 30 .

[0073] The shapes of the cathode glass 10 , the anode glass 20 and the bonding portion 30 are adapted to maximize the use of the light-transmitting areas of the cathode glass 10 and the anode glass 20 , so that the color-changing liquid can contact the cathode glass 10 and the anode glass 20 to the greatest extent possible.

[0074] In some embodiments, the intersection of any two sides of the cathode glass 10 is smoothly connected. Correspondingly, the intersection of any two sides of the anode glass 20 is smoothly connected, and the intersection of any two sides of the bonding portion 30 is also smoothly transitioned. After assembly, the intersection of any two sides of the smart glass assembly 100 is also smoothly connected, thereby improving the production safety and use safety of the smart glass assembly 100.

[0075] With reference to FIG6 , the present application provides a method for preparing a dimming glass assembly 100 , which is specifically used for preparing the aforementioned dimming glass assembly 100 . The preparation method includes the following steps:

[0076] Step S10 , providing cathode glass 10 and anode glass 20 .

[0077] In step S20 , adhesive is provided to form a bonding portion 30 . The bonding portion 30 is disposed between the cathode glass 10 and the anode glass 20 . The bonding portion 30 is annular with a gap. The gap forms a liquid injection channel 31 . The bonding portion 30 , the cathode glass 10 , and the anode glass 20 enclose a liquid injection cavity 40 .

[0078] In step S30 , a color-changing liquid is provided and injected into the liquid injection cavity 40 .

[0079] Step S40: injecting glue into the liquid injection channel 31, and solidifying the glue to form a sealing portion.

[0080] When the adhesive is a thermosetting adhesive, the corresponding curing machine is an oven; when the adhesive is a light-curing adhesive, the corresponding curing machine is a light-curing machine.

[0081] In step S20 , a dispensing machine is used to apply, fill, drip or spray adhesive onto the cathode glass 10 or the anode glass 20 to form an annular structure with a gap, that is, to form the bonding portion 30 .

[0082] In step S30, the liquid is poured using a filling machine. When moving the switchable glass assembly 100 after filling, it must be placed in a custom mold. Because the liquid filling channel 31 is located at the vertex of the adhesive portion 30 in the first direction X, the first direction X must be perpendicular to the ground Z, with the liquid filling channel 31 facing upward and vertically positioned. The mold should be moved as slowly as possible to prevent leakage of the color-changing liquid within the switchable glass assembly 100 after filling.

[0083] In some embodiments, step S40 includes:

[0084] Step S41, forming a negative pressure in the liquid injection cavity 40;

[0085] Step S42, the glue fills the injection channel 31 under the action of negative pressure;

[0086] Step S43: curing the adhesive to form a sealing portion.

[0087] The negative pressure in step S41 can be generated by external pressure or by first applying negative pressure to the sample and then gradually reducing it. The latter is easier to implement. The negative pressure is maintained for a period of time until the glue has completely filled the injection channel 31. This pressure forces the glue to be drawn into the sample and squeeze the adhesive portions 30 on both sides of the injection channel 31, thereby forming a dumbbell-shaped seal and the injection channel 31.

[0088] In step S42, the adhesive must have a certain degree of wettability with the cathode glass 10 and the anode glass 20. This degree of wettability refers to the contact angles between the adhesive and the surface of the anode glass 20, and between the adhesive and the surface of the cathode glass 10, after adding uncured adhesive to the clean, dry anode glass 20 facing the cathode glass 10 and the adhesive to the clean, dry cathode glass 10 facing the anode glass 20. These contact angles are all between 80° and 85°, and can be 80°, 81°, 82°, 85°, and so on. Specifically, the contact angle is the angle between the tangent line at the contact point of the adhesive drop on the glass surface and the glass surface. The adhesive must have a certain degree of wettability with the cathode glass 10 and the anode glass 20 so that the adhesive can fully fill the injection channel 31.

[0089] In order to ensure that the adhesive has good wettability on the surfaces of the cathode glass 10 and the anode glass 20 , it is usually necessary to clean and dry the surfaces of the cathode glass 10 and the anode glass 20 to remove impurities and moisture on the surfaces.

[0090] During the process of curing the adhesive to form the sealing portion, the adhesive will spontaneously fill the injection cavity 40 under the extrusion of negative pressure to form a dumbbell-shaped adhesive with no gaps. Before the sealing operation, the shape of the sealing portion is roughly corresponding to the shape of the injection channel 31.

[0091] In some embodiments, the method for preparing the switchable glass assembly 100 further includes:

[0092] Step S50 , trimming the sealing portion until the outer wall surface of the sealing portion is smoothly connected to the outer wall surface of the bonding portion 30 .

[0093] Trimming the sealing portion can maintain the beauty of the exterior of the switchable glass assembly 100 and reduce the adhesive residue on the outside of the liquid injection channel 31; cutting the glue can artificially control the appearance of the outside of the liquid injection channel 31, so that the liquid is not easy to adhere to and stay at the seal (because the first direction X is set to be parallel to the ground Z during use, it is easy for the color-changing liquid to flow down and not easy to adhere to the color-changing liquid), so as to ensure the dry state of the outside of the liquid injection channel 31, thereby greatly reducing the probability of the seal being penetrated by liquid.

[0094] In some embodiments, the viscosity of the viscose is a, satisfying: 1000 mPa·s≤a≤10000 mPa·s; the pressure difference between the negative pressure and the standard atmospheric pressure is Δ, satisfying: 50 Pa≤Δ≤270 Pa.

[0095] Negative pressure refers to the pressure inside the injection chamber 40 being less than the pressure of the preparation environment, and the magnitude of the negative pressure is related to the viscosity of the viscose. Specifically, when the viscosity of the viscose is 1000mPa·s≤a≤2000mPa·s, the corresponding Δ is 50Pa; when the viscosity of the viscose is 2000mPa·s<a≤3000mPa·s, the corresponding Δ is 80Pa; when the viscosity of the viscose is 3000mPa·s<a≤4000mPa·s, the corresponding Δ is 110Pa; when the viscosity of the viscose is 4000mPa·s<a≤5000mPa·s, the corresponding Δ is 150Pa; when the viscosity of the viscose is 5000mPa·s<a≤7000mPa·s, the corresponding Δ is 200Pa; and when the viscosity of the viscose is 7000mPa·s<a≤10000mPa·s, the corresponding Δ is 270Pa.

[0096] The magnitude of the negative pressure is adjusted according to the viscosity of the adhesive so that the sealing portion can fill the injection channel 31 under the action of the negative pressure, thereby avoiding a gap between the sealing portion and the injection channel 31. This helps to improve the sealing performance of the dimming glass assembly 100 and prevent the color-changing liquid from leaking from the sealing portion. At the same time, it can also prevent the sealing portion from being separated from the injection channel 31 due to external forces such as gravity, impact, or high pressure.

[0097] In some embodiments, the water content of the color-changing liquid is b, satisfying: b≤300 ppm; the oxygen content of the color-changing liquid is c, satisfying: c≤100 ppm. PPM (parts per million) is the percentage of solute mass to total solution mass.

[0098] Optionally, b can be 100ppm, 200ppm, 300ppm, etc., and c can be 50ppm, 80ppm, 100ppm, etc., without limitation.

[0099] When b>300ppm, the water content in the color-changing liquid is too high, and some color-changing substances in the color-changing liquid may react with water, affecting the color-changing effect, failing to meet usage requirements, and shortening the service life of the dimming glass assembly 100; when b≤300ppm, the water content in the color-changing liquid is low and will not affect the color-changing effect; when c>100ppm, since some color-changing substances require an oxygen-free environment to undergo a color-changing reaction, and a high oxygen content may inhibit the reaction of these color-changing substances, an excessively high oxygen content in the color-changing liquid may affect the color-changing effect or even result in no color change; when c≤100ppm, the oxygen content in the color-changing liquid is low, and the color-changing substances can undergo a color-changing reaction smoothly.

[0100] In some embodiments, the temperature of the preparation environment of the dimming glass assembly 100 is d, which satisfies: 21°C ≤ d ≤ 25°C; the relative humidity of the preparation environment of the dimming glass assembly 100 is e, which satisfies: 30% ≤ e ≤ 40%; the cleanliness level of the preparation environment of the dimming glass assembly 100 is N, which satisfies: N ≤ 4, where the test standard for the cleanliness level is GB 50073.

[0101] d can be 21°C, 22°C, 23°C, 24°C, 25°C, etc. N can be 1, 2, 3, or 4, that is, the number of particles with diameters greater than or equal to 1 μm, 0.5 μm, 0.3 μm, 0.2 μm, and 0.1 μm per square meter needs to be less than 83, 352, 1020, 2370, and 10,000, respectively.

[0102] In some embodiments, the preparation environment of the switchable glass assembly 100 is a clean room, which uses positive pressure and has a pressure difference of not less than 5 Pa with a non-clean area and not less than 10 Pa with the outside of the room.

[0103] Preparing the dimming glass assembly 100 in a preparation environment that meets the conditions of temperature, cleanliness level, etc. can prevent pollutants such as dust and particles from entering the color-changing liquid and affecting the properties of the color-changing liquid. At the same time, it can also ensure the surface smoothness of the cathode glass 10, the anode glass 20, etc., which is conducive to ensuring the manufacturing accuracy and stability of the dimming glass assembly 100, can reduce the product failure rate, and improve production efficiency.

[0104] Table 1 is the air cleanliness grade table of suspended particles in the air in clean rooms and clean areas.

[0105] Table 1

[0106] Referring to Figure 7 , this application also provides a vehicle 200 comprising a dimming glass assembly 201. This dimming glass assembly 201 can be the dimming device provided in any of the aforementioned embodiments, or a dimming glass assembly prepared by the method for preparing a dimming glass assembly provided in any of the aforementioned embodiments. In vehicle 200, the dimming glass assembly 201 can be a rearview mirror. This ensures that the internal color-changing liquid of the rearview mirror is not affected by external water and oxygen during use, and maintains a stable seal structure even under large internal and external pressure differentials, thereby ensuring a high degree of sealing.

[0107] The technical solution of this application is described in detail below through specific embodiments.

[0108] The width of the injection channel 31 of the dimming glass assembly 100 of Example 1 near the injection cavity 40 is greater than the width of the middle area of ​​the injection channel 31, and the injection channel 31 is arranged at the vertex of the adhesive portion 30 in the first direction X, and the sealing portion fills the injection channel 31 under the action of negative pressure.

[0109] The shape and position of the liquid injection channel 31 of the dimming glass assembly 100 of Example 1 are not limited, and the sealing method of the liquid injection channel 31 is to directly apply glue on the liquid injection channel 31 and use gravity to make it penetrate into the gap reserved in the bonding part 30 to complete the sealing.

[0110] The initial color-changing liquids of Example 1 and Comparative Example 1 are the same, with a water content of ≤100 PPM and an oxygen content of ≤15 PPM.

[0111] The internal water and oxygen content, the tolerance in a high humidity environment, and the tolerance under high and low temperature cycles of Example 1 and Comparative Example 1 were tested respectively.

[0112] Table 2 shows the test results of the water and oxygen content inside the Example 1 and the Comparative Example 1 after filling. The test method is as follows: the water content and oxygen content of the internal color-changing liquid of the Example 1 and the Comparative Example 1 are tested, the samples are moved into a glove box, the internal color-changing liquid is extracted and the water and oxygen content is measured using a water content meter and a dissolved oxygen meter. The Example 1 and the Comparative Example 1 respectively provide 5 samples, and the corresponding group numbers are 1, 2, 3, 4, and 5.

[0113] Table 3 shows the resistance of Example 1 and Comparative Example 1 to high humidity. The test method was as follows: Example 1 and Comparative Example 1 were placed in an environment with a constant relative humidity of 80% RH to simulate the high humidity conditions experienced during normal use. A 1.2V constant voltage power supply was used to perform a color change cycle. Each cycle was set as follows: power on for 30 seconds, then off for 30 seconds, to simulate the charge and discharge process during normal use. The number of cycles was 20,000. After completion, the samples were transferred to a glove box and their water and oxygen contents were measured using a water content meter and a dissolved oxygen meter. Five samples were provided for each of Example 1 and Comparative Example 1, and the corresponding samples are numbered 1, 2, 3, 4, and 5.

[0114] Table 4 shows the resistance of Example 1 and Comparative Example 1 to high-low temperature cycling. The testing method was as follows: Example 1 and Comparative Example 1 were placed in an environment with a temperature range of 85°C to -15°C. The cycle was repeated 300 times: first maintaining the temperature at 85°C for 30 minutes, then lowering the temperature to -15°C for 30 minutes. The water and oxygen contents were then measured in a glove box using a water content meter and a dissolved oxygen meter, and the data were recorded. Five samples were provided for each of Example 1 and Comparative Example 1, and the corresponding groups were numbered 1, 2, 3, 4, and 5.

[0115] Table 2

[0116] Table 3

[0117] Table 4

[0118] Note: If the water content in the color-changing liquid is greater than 300ppm and the oxygen content is greater than 100ppm, it will be considered unqualified. In this case, the service life of the device will be shortened and it will not meet the usage requirements.

[0119] As can be seen from Table 2, compared with Comparative Example 1, the color-changing liquid of the switchable glass assembly 100 of Example 1 contains less oxygen and water after sealing. The water content and oxygen content of Example 1 are much lower than those of Comparative Example 1, with average values ​​of 19 ppm and 35.2 ppm, respectively. This is beneficial to improving the operating stability of the switchable glass assembly 100 and extending the service life of the switchable glass assembly 100.

[0120] As shown in Table 3, compared with Comparative Example 1, the switchable glass assembly 100 of Example 1 has stronger water and oxygen resistance in an environment with a relative humidity of 80% Rh. After 20,000 power-on cycles, the sample of Example 1 was identified as an unqualified sample due to its excessively high water and oxygen content, while Example 1 still remained within the qualified range.

[0121] As can be seen from Table 4, compared with Comparative Example 1, the dimming glass assembly 100 of Example 1 has better high-temperature and low-temperature impact resistance than Comparative Example 1 in the hot and cold cycle experiment, and the water and oxygen content of its color-changing liquid remains within the qualified range, while the samples of Comparative Example 1 are all judged to be unqualified.

[0122] This application defines the shape and position of the injection channel 31 and the sealing portion at the sealed portion of the dimming glass assembly 100. The width of the injection channel 31 near the injection cavity 40 is greater than the width outside the middle portion of the injection channel 31, and the injection channel 31 is disposed at the vertex of the adhesive portion 30 in the first direction X. This allows the dimming glass assembly 100 to be subjected to high temperature, external high pressure, or extrusion, which causes inconsistent pressures inside and outside the sealed portion. The dumbbell-shaped sealing portion can effectively protect the color-changing liquid inside the product and ensure that the color-changing liquid does not leak out of the sealed portion. Because the sealing portion and the injection channel 31 form a snap-fit ​​structure, it can effectively prevent displacement of the sealing portion, reinforce the sealed portion, and thus extend the stability and service life of the dimming glass assembly 100. At the same time, filling the injection channel 31 with the sealing portion under a negative pressure environment can ensure that there is no gap between the sealing portion and the injection channel 31. The aforementioned series of operations enable the switchable glass assembly 100 of the present application to have better tolerance during the liquid filling stage, in high humidity environments, and when subjected to thermal shocks. The water and oxygen content in the switchable glass assembly 100 can be kept stable within a certain range, which is beneficial to extending the service life of the switchable glass assembly 100. In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of indicators such as terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside" are based on the orientation or positional relationship described in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present application.

[0123] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present application are still within the scope covered by the present application.

Claims

1. A dimming glass assembly, comprising: cathode glass (10); an anode glass (20) spaced apart from the cathode glass (10); A bonding portion (30) is provided between the cathode glass (10) and the anode glass (20), the bonding portion (30) being annular with a gap, the gap forming a liquid injection channel (31), and the bonding portion (30), the cathode glass (10), and the anode glass (20) enclosing a liquid injection cavity (40); Color-changing liquid, contained in the liquid injection cavity (40); a sealing portion received in the injection channel (31) to seal the injection cavity (40); The width of the injection channel (31) in a region close to the injection cavity (40) is greater than the width of a middle region of the injection channel (31).

2. The switchable glass assembly according to claim 1, wherein: The width of the region of the injection channel (31) away from the injection cavity (40) is greater than the width of the middle region of the injection channel (31).

3. The switchable glass assembly according to claim 1 or 2, wherein: The bonding portion (30) has a first end surface (311) and a second end surface (312), the first end surface (311) and the second end surface (312) are opposite to each other and spaced apart, the gap between the first end surface (311) and the second end surface (312) forms the injection channel (31), and at least one of the first end surface (311) and the second end surface (312) is a smooth curved surface.

4. The switchable glass assembly according to claim 3, wherein: The first end surface (311) and the second end surface (312) are both curved surfaces with the middle portion being convex compared to the surrounding portions.

5. The switchable glass assembly according to any one of claims 1 to 4, wherein: The bonding portion (30) has a larger dimension in a first direction than in a second direction, and the bonding portion (30) has the injection channel (31) at a vertex in the first direction, and the first direction intersects with the second direction.

6. The switchable glass assembly according to any one of claims 1 to 5, wherein: The cathode glass (10), the anode glass (20) and the bonding portion (30) are adapted in shape.

7. The switchable glass assembly according to claim 6, wherein: The intersections of any two sides of the cathode glass (10) are smoothly connected.

8. A method for preparing a dimming glass assembly, comprising the following steps: Providing cathode glass (10) and anode glass (20); Providing adhesive to form a bonding portion (30), the bonding portion (30) being arranged between the cathode glass (10) and the anode glass (20), the bonding portion (30) being annular with a gap, the gap forming a liquid injection channel (31), the bonding portion (30), the cathode glass (10) and the anode glass (20) enclosing to form a liquid injection cavity (40); Providing a color-changing liquid and injecting it into the liquid injection cavity (40); The adhesive is injected into the liquid injection channel (31), and the adhesive is solidified to form a sealing portion.

9. The method for preparing a switchable glass assembly according to claim 8, wherein: Injecting the viscose into the injection channel (31), and solidifying the viscose to form a sealing portion, comprising: forming a negative pressure in the injection cavity (40); The viscose fills the injection channel (31) under the action of the negative pressure; The adhesive is cured to form the seal.

10. The method for preparing the switchable glass assembly according to claim 8 or 9, further comprising: The sealing portion is trimmed until the outer wall surface of the sealing portion is smoothly connected to the outer wall surface of the bonding portion (30).

11. The method for preparing a switchable glass assembly according to claim 9, wherein: The viscosity of the viscose is a, which satisfies: 1000 mPa·s≤a≤10000 mPa·s; the pressure difference between the negative pressure and the standard atmospheric pressure is Δ, which satisfies: 50 Pa≤Δ≤270 Pa.

12. The method for preparing a switchable glass assembly according to any one of claims 8 to 11, wherein: The water content of the color-changing liquid is b, which satisfies: b≤300ppm; the oxygen content of the color-changing liquid is c, which satisfies: c≤100ppm.

13. The method for preparing a switchable glass assembly according to any one of claims 8 to 12, wherein: The temperature of the preparation environment of the dimming glass assembly is d, which satisfies: 21°C ≤ d ≤ 25°C; the relative humidity of the preparation environment of the dimming glass assembly is e, which satisfies: 30% ≤ e ≤ 40%; the cleanliness level of the preparation environment of the dimming glass assembly is N, which satisfies: N ≤ 4, wherein the test standard for the cleanliness level is GB 50073.

14. A vehicle comprising the switchable glass assembly according to any one of claims 1 to 7, or comprising the switchable glass assembly prepared by the method for preparing the switchable glass assembly according to any one of claims 8 to 13.

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