An electrochromic device

Abstract

The application relates to the technical field of electrochromic technology and discloses an electrochromic device. The electrochromic device comprises a first substrate, a second substrate, a first bonding layer, a second bonding layer, an electrochromic film and a bus electrode. An edge region of the electrochromic film comprises a first region and a second region which are distributed in the circumferential direction of the electrochromic film. The bus electrode is arranged in the first region. A first sealing member is arranged along the edge of the second region. The electrochromic device has an excellent waterproof oxygen permeation effect while increasing the area of the electrochromic region, and can be applied to application scenarios in which at least part of the end portion of the electrochromic device is exposed in the field of vision during use, such as the fields of automobiles, glasses and buildings.

Description

Technical Field

[0001] This application relates to the field of electrochromic technology, and more specifically, to an electrochromic device. Background Technology

[0002] Electrochromism typically refers to the phenomenon where an applied electric field induces an electrochemical oxidation-reduction reaction in an electrochromic film, causing it to exhibit a reversible color change. An electrochromic film usually consists of three layers of material sandwiched between two transparent electrodes, with interfaces between them. Spatially, these layers are, in order, a charge storage layer, an electrolyte layer, and an electrochromic layer. By integrating the electrochromic film with glass, film, and busbars mounted on the electrochromic film through a lamination process, electrochromic devices can be applied to windshields, sunroofs, side door windows, and rear windshields, providing effects such as sun shading, heat insulation, and privacy protection.

[0003] Electrochromic devices used in the automotive industry can be divided into two main categories. One type is fixed to the vehicle body after installation, without moving up and down or back and forth, such as windshields and rear windshields. The other type is movable relative to the vehicle body after installation, such as side door windows, where the device moves up and down as needed. During this movement, at least the top of the electrochromic device is visible. Busbars are typically arranged circumferentially along the edge of the electrochromic device to increase the speed and uniformity of electrochromic changes. When an electrochromic device is used as a side door window, the busbars near the top edge of the device become exposed, reducing the electrochromic area and negatively impacting aesthetics. Furthermore, in actual use, electrochromic devices may encounter rain, high humidity, and other environments. Moisture can seep into the interior through gaps around the glass, eroding the electrochromic film and causing abnormal discoloration and other malfunctions around the edges after prolonged use. Therefore, the distance between the electrochromic film and the glass edge is usually set above a certain range to slow down the entry of moisture and ensure that it does not fail throughout its lifespan. However, this method limits the application scenarios of electrochromic films, namely, only in situations where the edge distance between the film and the glass is not critical. For side door windows, when moving up and down relative to the vehicle body, the top of the electrochromic device is exposed in the field of vision. If the distance between the electrochromic film and the glass edge is too large, a noticeable non-color-changing area will exist between the edge of the electrochromic film and the glass edge during electrochromic activation, resulting in a smaller electrochromic area and a visually significant inconsistency, leading to a poor user experience.

[0004] For example, Chinese invention patent CN116974115A (application number 202310940170.7), entitled "An Electrochromic Mood-Enhancing Glass and Its Preparation Method," discloses an electrochromic mood-enhancing glass comprising an electrochromic mood-enhancing thin-film device, glass, and a bonding adhesive. Bonding adhesive is provided on opposite sides of two glass panes. The electrochromic mood-enhancing thin-film device is sandwiched between the two glass panes and encapsulated by the bonding adhesive. The electrochromic mood-enhancing thin-film device includes a conductive tape electrode (bus electrode), a lead-out electrode, and a protective layer. The conductive tape electrode is disposed on a conductive substrate of the electrochromic mood-enhancing thin-film device. The lead-out electrode is disposed on the conductive substrate or the conductive tape electrode and is conductive to the conductive tape electrode, extending to the outside of the glass for connection to an external power source. The protective layer covers the conductive tape electrode and seals it on the conductive substrate. This application solves the short-term failure problem of the electrochromic mood-enhancing thin-film device in electrochromic mood-enhancing glass by setting a protective layer for the conductive tape electrode. However, the following problems exist:

[0005] 1) In the embodiment, the conductive tape electrode (bus electrode) is arranged around the edge of the electrochromic color-changing glass, which is not suitable for the application scenario of side door glass;

[0006] 2) The protective layer covers the conductive tape electrode and seals the conductive tape electrode on the conductive substrate. Its function is to protect the conductive tape electrode, but it does not solve the problem of water vapor penetration and failure. Summary of the Invention

[0007] The purpose of this invention is to propose an electrochromic device that increases the area of ​​the electrochromic region while having excellent waterproof and oxygen-permeable properties.

[0008] To achieve the above-mentioned objectives, this application adopts the following technical solution:

[0009] In a first aspect, this application provides an electrochromic device, comprising:

[0010] First substrate;

[0011] The second substrate is disposed relative to the first substrate;

[0012] A first adhesive layer is disposed on a first substrate and located between the first substrate and the second substrate;

[0013] The second adhesive layer is disposed on the second substrate and located between the first substrate and the second substrate, opposite to the first adhesive layer;

[0014] An electrochromic film is disposed between a first adhesive layer and a second adhesive layer;

[0015] A bus electrode is disposed at the edge region of the electrochromic film, and the bus electrode is electrically connected to the electrochromic film;

[0016] The edge region of the electrochromic film includes a first region and a second region distributed along the circumference of the electrochromic film.

[0017] The bus electrode is disposed in the first region;

[0018] It also includes a first seal, disposed along the second region.

[0019] Furthermore, the first seal is disposed in the inner region of the first substrate and the second substrate.

[0020] Furthermore, the electrochromic film extends into the interior of the first seal.

[0021] Furthermore, there is a distance between the first adhesive layer and the second adhesive layer located on the second region side of the electrochromic film and the edges of the first substrate and the second substrate, and the first sealing member is disposed on the edges of the first adhesive layer and the second adhesive layer.

[0022] Furthermore, the first adhesive layer and the second adhesive layer are flush with the edges of the first substrate and the second substrate, and the first seal is disposed between the first adhesive layer and the second adhesive layer.

[0023] Furthermore, the first seal is disposed in the outer region of the first substrate and the second substrate.

[0024] Furthermore, the electrochromic film extends into the interior of the first seal.

[0025] Furthermore, the first sealing member extends into the inner regions of the first substrate and the second substrate, forming an extension portion.

[0026] Furthermore, there is a distance between the first adhesive layer and the second adhesive layer on the second region side of the electrochromic film and the edges of the first substrate and the second substrate, and the extension extends to the edges of the first adhesive layer and the second adhesive layer.

[0027] Furthermore, it also includes a second seal disposed between the electrochromic film and the first seal.

[0028] Furthermore, the planar shape of the electrochromic device is selected from rectangles, squares, circles, polygons, or irregular shapes and combinations thereof.

[0029] Secondly, this application provides the application of the aforementioned electrochromic device.

[0030] The electrochromic device is used in the automotive, eyewear, and construction industries.

[0031] In summary, this application has the following beneficial effects:

[0032] The electrochromic device of this application increases the area of ​​the electrochromic region while having excellent waterproof and oxygen-permeable effects. It can be used in application scenarios where at least part of the end of the electrochromic device will be exposed in the field of vision during use, such as the automotive, eyewear, and construction fields, especially frameless automotive side door glass, single-rimmed eyeglass glass, and semi-rimmed architectural glass. Attached Figure Description

[0033] Figure 1 Schematic diagram of the structure of the electrochromic device with three-sided bus electrodes in Embodiment 1 of this application Figure 1 ;

[0034] a: Schematic diagram of the electrochromic device structure; b: Schematic diagram of the AA section in a; c, d: Schematic diagram of the BB section in a under different implementation methods.

[0035] Figure 2 Schematic diagram of the structure of the electrochromic device with three-sided bus electrodes in Embodiment 1 of this application Figure 2 ;

[0036] a: Schematic diagram of the electrochromic device structure; b, c: Schematic diagram of the AA section in a under different implementation methods; d: Schematic diagram of the BB section in a.

[0037] Figure 3 Schematic diagram of the structure of the electrochromic device with three-sided bus electrodes in Embodiment 2 of this application Figure 1 ;

[0038] a: Schematic diagram of the electrochromic device structure; b: Schematic diagram of section AA in a; c: Schematic diagram of section BB in a; d: Schematic diagram of section CC in a.

[0039] Figure 4 Schematic diagram of the structure of the electrochromic device with three-sided bus electrodes in Embodiment 2 of this application Figure 2 ;

[0040] a: Schematic diagram of the electrochromic device structure; b: Schematic diagram of section AA in a; c: Schematic diagram of section BB in a.

[0041] Figure 5 Schematic diagram of the structure of the electrochromic device with three-sided bus electrodes in Embodiment 3 of this application. Figure 1 ;

[0042] a: Schematic diagram of the electrochromic device structure; b: Schematic diagram of section AA in a; c: Schematic diagram of section BB in a.

[0043] Figure 6 Schematic diagram of the structure of the electrochromic device with three-sided bus electrodes in Embodiment 3 of this application. Figure 2 ;

[0044] a: Schematic diagram of the electrochromic device structure; b: Schematic diagram of section AA in a; c: Schematic diagram of section BB in a.

[0045] Figure 7 Schematic diagram of the structure of the electrochromic device with three-sided bus electrodes in Embodiment 3 of this application. Figure 3 ;

[0046] a: Schematic diagram of the electrochromic device structure; b: Schematic diagram of the AA section in a; c, d, e: Schematic diagram of the BB section in a under different implementation methods.

[0047] Figure 8 Schematic diagram of the structure of the electrochromic device with three-sided bus electrodes in Embodiment 3 of this application. Figure 4 ;

[0048] a: Schematic diagram of the electrochromic device structure; b, c, d: Schematic diagram of the AA section in a under different implementation methods; e: Schematic diagram of the BB section in a.

[0049] Figure 9 Schematic diagram of the structure of the electrochromic device with a single-sided bus electrode in Embodiment 4 of this application. Figure 1 ;

[0050] a: Schematic diagram of the electrochromic device structure; b, c: Schematic diagram of the AA section in a under different implementation methods; d, e: Schematic diagram of the BB section in a under different implementation methods.

[0051] Figure 10 Schematic diagram of the structure of the electrochromic device with a single-sided bus electrode in Embodiment 4 of this application. Figure 2 ;

[0052] a: Schematic diagram of the electrochromic device structure; b, c: Schematic diagram of the AA section in a under different implementation methods; d, e, f, g: Schematic diagram of the BB section in a under different implementation methods.

[0053] Figure 11 Schematic diagram of the structure of the electrochromic device with a single-sided bus electrode in Embodiment 5 of this application. Figure 1 ;

[0054] a: Schematic diagram of the electrochromic device structure; b: Schematic diagram of section AA in a; c: Schematic diagram of section BB in a; d: Schematic diagram of section CC in a.

[0055] Figure 12 Schematic diagram of the structure of the electrochromic device with a single-sided bus electrode in Embodiment 5 of this application. Figure 2 ;

[0056] a: Schematic diagram of the electrochromic device structure; b: Schematic diagram of section AA in a; c: Schematic diagram of section BB in a; d: Schematic diagram of section CC in a.

[0057] Figure 13 Schematic diagram of the structure of the electrochromic device with a single-sided bus electrode in Embodiment 6 of this application. Figure 1 ;

[0058] a: Schematic diagram of the electrochromic device structure; b: Schematic diagram of section AA in a; c: Schematic diagram of section BB in a.

[0059] Figure 14 Schematic diagram of the structure of the electrochromic device with a single-sided bus electrode in Embodiment 6 of this application. Figure 2 ;

[0060] a: Schematic diagram of the electrochromic device structure; b: Schematic diagram of section AA in a; c: Schematic diagram of section BB in a.

[0061] Reference numerals: 1. First substrate; 2. First adhesive layer; 3. Electrochromic film; 4. Second adhesive layer; 5. Second substrate; 6. Bus electrode; 7. Lead-out electrode; 8. First seal; 81. Extension; 9. Second seal. Detailed Implementation

[0062] The technical solutions and effects of this application will be further described in detail below with reference to embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the invention, not the entire structure.

[0063] Reference Figures 1-14 This application discloses an electrochromic device, comprising:

[0064] First substrate;

[0065] The second substrate is disposed relative to the first substrate;

[0066] A first adhesive layer is disposed on a first substrate and located between the first substrate and the second substrate;

[0067] The second adhesive layer is disposed on the second substrate and located between the first substrate and the second substrate, opposite to the first adhesive layer;

[0068] An electrochromic film is disposed between a first adhesive layer and a second adhesive layer; the edge region of the electrochromic film includes a first region and a second region distributed along the circumference of the electrochromic film.

[0069] A bus electrode is disposed at the edge region of the electrochromic film and is electrically connected to the electrochromic film; the bus electrode is disposed in the first region.

[0070] The first seal is disposed along the second region.

[0071] The electrochromic film includes: a first conductive layer; a second conductive layer; a charge storage layer coated on the first conductive layer; an electrochromic layer coated on the second conductive layer; an electrolyte layer disposed between the charge storage layer and the electrochromic layer; and a bus electrode electrically connected to the first conductive layer and the second conductive layer.

[0072] The electrode layers in the first and second conductive layers are selected from one of indium tin oxide (ITO), fluorine-doped tin oxide (FTO), aluminum-doped zinc oxide (AZO), indium zinc oxide (IZO), graphene, and PEDOT:PSS.

[0073] The bus electrode is selected from one of the following: copper foil tape, FPC, platinum, gold, and silver.

[0074] The planar shape of the electrochromic device can be any shape, such as rectangular, square, circular, polygonal, or irregular. In this embodiment, the planar shape of the electrochromic device is rectangular. The materials of the first and second substrates are existing technologies, and glass substrates can be selected. The materials of the first and second adhesive layers in this embodiment are existing technologies, and PVB can be selected.

[0075] The cavity formed by the first and second substrates is the inner region, and the first adhesive layer, electrochromic film, and second adhesive layer are located inside the cavity. The outer side of the cavity is the outer region.

[0076] The first and second seals are selected from one or more of the following: polyethylene terephthalate (PET), ethylene vinyl acetate (EVA), SentryGlas Plus (SGP), epoxy resin, silicone sealant (SiR), modified silane sealant (MS), butyl rubber sealant (BR), thermoplastic polyurethane (TPU), polyethylene (PE), and polypropylene (PP).

[0077] The following Examples 1-3 disclose electrochromic devices with three-sided bus electrodes. The characteristic of this structure is that one side of the electrochromic film does not have a bus electrode, as shown in Figure 1-3. Figure 1-8The electrochromic device includes a first substrate, a first adhesive layer, an electrochromic film, a second adhesive layer, a second substrate, and a first sealing element. The edge region of the electrochromic film includes a first region and a second region distributed circumferentially along the electrochromic film. The first region is formed by the edges of the three sides of the electrochromic film. A bus electrode is disposed in the first region and electrically connected to the first and second conductive layers of the electrochromic film. A lead-out electrode is also connected to the bus electrode. The second region is the area along the side edges of the electrochromic film where no bus electrode is disposed.

[0078] Example 1

[0079] Reference Figure 1 and Figure 2 In this embodiment, the first adhesive layer and the second adhesive layer are located at a distance between the edge of the second region of the electrochromic film and the edges of the first and second substrates. The first sealing member is disposed in the inner region of the first substrate and the second substrate, and is located at the edge of the second region, the first adhesive layer and the second adhesive layer.

[0080] Different implementation methods can exist depending on the placement of the electrochromic film (i.e., whether the electrochromic film extends into the first seal). Figure 1 -c and Figure 2 -b illustrates one embodiment in which the edge of the electrochromic film on the non-bus electrode side (second region) extends into the first seal; Figure 1 -d and Figure 2 -c illustrates another implementation where the edge of the electrochromic film on the non-busbar electrode side (second region) is flush with the first and second adhesive layers and does not extend into the first seal.

[0081] Example 2

[0082] Reference Figure 3 and Figure 4 In this embodiment, the edges of the first and second adhesive layers are flush with or substantially flush with the first and second substrates. The first sealing member is disposed on the edge of the electrochromic film on the side without the busbar electrode (second region), located in the inner region of the first and second substrates and between the first and second adhesive layers. To achieve better water vapor protection, the side of the electrochromic film on the side without the busbar electrode (second region) extends into the interior of the first sealing member, and the first sealing member wraps around the edge of the electrochromic film on the side without the busbar electrode.

[0083] Example 3

[0084] Reference Figures 5-8 In this embodiment, the first sealing element is disposed at the edge of the second region of the electrochromic film and is disposed in the outer region of the first substrate and the second substrate.

[0085] In one embodiment, reference is made to Figure 5 and Figure 6 The edges of the first adhesive layer, the edge of the electrochromic film on the side without the busbar electrode (second region), and the edge of the second adhesive layer are flush with or substantially flush with the edges of the first and second substrates, and are all covered by the first sealant. In this embodiment, the edge of the electrochromic film on the side without the busbar electrode is flush with or substantially flush with the edges of the first and second substrates, maximizing the electrochromic area.

[0086] In another implementation, refer to Figure 7 and Figure 8 Depending on whether the electrochromic film extends into the first seal, the following situations apply:

[0087] 1) Figure 7 -c The electrochromic film extends into the first seal;

[0088] 2) Figure 7 -d The electrochromic film does not extend into the first seal;

[0089] Implementation method 1, Figure 8 -c, the first adhesive layer and the second adhesive layer are located at the edge of the second region of the electrochromic film, and there is a distance between the edge of the second region of the electrochromic film and the edges of the first and second substrates. The first sealing member extends into the cavity formed by the first and second substrates, reaching the edge of the first adhesive layer, the edge of the electrochromic film on the side without the busbar electrode, and the edge of the second adhesive layer, forming an extension. In this embodiment, the first sealing member is located inside and outside the cavity formed by the first and second substrates, which increases the color-changing area of ​​the electrode and further improves the stability under high humidity and high temperature.

[0090] Implementation method 2, Figure 8 -b The first adhesive layer and the second adhesive layer are located at a distance between the side edge of the second region of the electrochromic film and the edges of the first and second substrates. The side edge of the second region of the electrochromic film is flush with the edges of the first and second substrates. The first seal extends into the cavity formed by the first and second substrates, to the edges of the first adhesive layer and the second adhesive layer, forming an extension.

[0091] Implementation method 3, refer to Figure 7 -e and Figure 8 -d, the electrochromic device also includes a second sealing element, which is disposed between the edge of the electrochromic film on the side without the busbar electrode and the first sealing element. In this example, the first sealing element is disposed in the outer region of the first substrate and the second substrate, and extends inward to the edge of the first adhesive layer and the edge of the second adhesive layer, and cooperates with the second sealing element to achieve sealing protection for the electrochromic film. It is worth noting that, although Figure 7 -e and Figure 8-d only shows a scheme where the edges of the first adhesive layer, the edge of the electrochromic film on the side without the busbar electrode, and the edge of the second adhesive layer are flush, but it is only an exemplary scheme. It is understood that the electrochromic film may also extend into the second seal.

[0092] The following embodiments 4-6 disclose an electrochromic device with a single-sided bus electrode. The characteristic of this structure is that the electrochromic film contains a bus electrode on only one side, as shown in Figure 4-6. Figure 9-14 The electrochromic device comprises a first substrate, a first adhesive layer, an electrochromic film, a second adhesive layer, a second substrate, and a first sealing element. The edge region of the electrochromic film includes a first region and a second region distributed circumferentially along the electrochromic film. The first region is formed by the edge of one side of the electrochromic film. A bus electrode is disposed on the electrochromic film and located within the first region of the electrochromic film. The bus electrode is electrically connected to the first and second conductive layers of the electrochromic film, and a lead-out electrode is also connected to the bus electrode. The second region is the area along the side edge of the electrochromic film where no bus electrode is disposed.

[0093] Example 4

[0094] Reference Figure 9 and Figure 10 In this embodiment, the first adhesive layer and the second adhesive layer are located at a distance between the second region side of the electrochromic film and the edges of the first and second substrates. The first sealing member is disposed in the inner region of the first substrate and the second substrate, and is located on the side of the electrochromic film without a busbar electrode (second region), at the edge of the first adhesive layer and the second adhesive layer.

[0095] Different implementation methods can exist depending on the placement of the electrochromic film (i.e., whether the electrochromic film extends into the interior of the first seal). Figure 9 -b、 Figure 9 -d and Figure 10 -b illustrates one embodiment in which the edge of the electrochromic film on the side without the busbar electrode extends into the first seal; Figure 9 -c、 Figure 9 -e and Figure 10 -c illustrates another implementation where the edge of the electrochromic film on the side without the busbar electrode does not extend into the first seal.

[0096] Furthermore, depending on the depth to which the electrochromic film extends into the first seal, there can be several different implementation methods. Figure 10 -e、 Figure 10 -f and Figure 10 -g illustrates three examples with different extension depths. It is understandable that in a single-sided bus electrode electrochromic device, the depth of extension to the first seal on the three non-bus electrode sides of the electrochromic film can be the same or different.

[0097] Example 5

[0098] Reference Figure 11 and Figure 12 In this embodiment, the edges of the first and second adhesive layers are flush with or substantially flush with the first and second substrates. The first sealing member is disposed in the inner region of the first and second substrates, located at the edge of the electrochromic film on the side without the busbar electrode (second region), and between the first and second adhesive layers. To achieve better waterproofing, the side of the electrochromic film on the side without the busbar electrode (second region) extends into the interior of the first sealing member, and the first sealing member wraps around the edge of the electrochromic film on the side without the busbar electrode.

[0099] Example 6

[0100] Reference Figure 13 and Figure 14 In this embodiment, the first sealing member is disposed at the edge of the second region of the electrochromic film and is located on the outer side of the first and second substrates. The edges of the first adhesive layer, the edge of the electrochromic film on the side without the busbar electrode (the second region), and the edge of the second adhesive layer are flush with or substantially flush with the edges of the first and second substrates, and are all covered by the first sealing member. In this embodiment, the edge of the electrochromic film on the side without the busbar electrode is flush with or substantially flush with the edges of the first and second substrates, maximizing the electrochromic area.

[0101] Technical effect description:

[0102] In the embodiment, the first sealing element has excellent water and heat insulation properties. The introduction of the first sealing element can effectively isolate external moisture and heat, so that the electrochromic film without the busbar electrode side extends as far as possible to the outside of the electrochromic device. The distance from the edge of the first and second substrates can be controlled within the range of 0.01~10mm, increasing the electrochromic area and having excellent high humidity and high temperature stability.

[0103] The processing technology of the first and second seals is further explained. For sheet-type first and second seals, direct bonding can be used, and the thickness can be set in the range of 0.01~10mm; for adhesive-type first and second seals, extrusion, dispensing, printing, transfer and other processing methods can be used, and the thickness can be set in the range of 0.1~10mm.

[0104] This electrochromic device can be applied to frameless automotive side door glass, single-frame eyeglass glass, and semi-framed architectural glass. Areas without busbar electrodes do not require black screen printing, allowing for frameless coverage and enabling a wider electrochromic range, as well as meeting the aesthetic requirements of various application scenarios.

[0105] Performance verification group:

[0106] Method 1: No first seal is provided; all other settings are the same as in Example 1.

[0107] Method 2: The electrochromic device disclosed in Example 1 has a first sealing element thickness of 2mm and a distance of 2mm between the edge of the side without the busbar electrode and the edges of the first and second substrates;

[0108] Method 3: The electrochromic device disclosed in Example 1 has a first sealing element thickness of 5mm and a distance of 2mm between the edge of the side without the busbar electrode and the edges of the first and second substrates.

[0109] Verification method:

[0110] Store at 80℃ and 95%RH (humidity) for 672 hours to age.

[0111] Verification results:

[0112]

[0113] The appearance comparison images after verification using methods 1, 2, and 3 show that:

[0114] The electrochromic device exhibited a significant color-changing anomaly failure zone on the edge of the non-busbar electrode side, demonstrating very poor resistance to moisture. Conversely, the electrochromic device with the first seal showed no abnormalities. Therefore, the first seal effectively prevented moisture from entering the electrochromic film.

[0115] TL represents the transmittance of the electrochromic device; ΔTL mean change / % represents the average change in transmittance before and after aging; ΔTL rate of change / % represents the average rate of change in transmittance before and after aging; T / S represents the charge / discharge time of the device; ΔT mean change / % represents the average change in charge / discharge time; and ΔT rate of change / % represents the average rate of change in charge / discharge time. Additionally, C indicates that the device is in a bright state, and D indicates that the device is in a dark state.

[0116] result:

[0117]

[0118] As shown in the table above, the performance of electrochromic devices with 2mm and 5mm first seals is compared with that without a first seal. The sample corresponding to Method 1 shows a greater decrease in bright-state transmittance and a significantly longer charging time after aging, while the samples corresponding to Methods 2 and 3 show less performance change, further illustrating the effective protective role of the first seal. Combining the comparison of the performance and lifespan of the electrochromic film, the use of a seal on the edge of the electrochromic film without a busbar electrode broadens the margin range to meet the needs of different application scenarios.

[0119] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An electrochromic device, comprising: First substrate; The second substrate is disposed relative to the first substrate; A first adhesive layer is disposed on a first substrate and located between the first substrate and the second substrate; The second adhesive layer is disposed on the second substrate and located between the first substrate and the second substrate, opposite to the first adhesive layer; An electrochromic film is disposed between a first adhesive layer and a second adhesive layer; A bus electrode is disposed at the edge region of the electrochromic film, and the bus electrode is electrically connected to the electrochromic film; Its features are: The edge region of the electrochromic film includes a first region and a second region distributed along the circumference of the electrochromic film. The bus electrode is disposed in the first region; It also includes a first seal, disposed along the second region.

2. The electrochromic device according to claim 1, characterized in that: The first seal is disposed in the inner region of the first substrate and the second substrate.

3. The electrochromic device according to claim 2, characterized in that: The electrochromic film extends into the interior of the first seal.

4. The electrochromic device according to claim 2, characterized in that: The first adhesive layer and the second adhesive layer are located at a distance from the edges of the first substrate and the second substrate on the second region side of the electrochromic film, and the first sealing member is disposed at the edges of the first adhesive layer and the second adhesive layer.

5. The electrochromic device according to claim 2, characterized in that: The first adhesive layer and the second adhesive layer are flush with the edges of the first substrate and the second substrate, and the first sealing member is disposed between the first adhesive layer and the second adhesive layer.

6. The electrochromic device according to claim 1, characterized in that: The first seal is disposed in the outer region of the first substrate and the second substrate.

7. The electrochromic device according to claim 6, characterized in that: The electrochromic film extends into the interior of the first seal.

8. The electrochromic device according to claim 6, characterized in that: The first sealing member extends into the inner regions of the first substrate and the second substrate, forming an extension portion.

9. The electrochromic device according to claim 8, characterized in that: The first adhesive layer and the second adhesive layer are located at a distance from the edges of the first substrate and the second substrate on the second region side of the electrochromic film, and the extension extends to the edges of the first adhesive layer and the second adhesive layer.

10. The electrochromic device according to claim 1, characterized in that: It also includes a second seal disposed between the electrochromic film and the first seal.

11. The electrochromic device according to claim 1, characterized in that: The planar shape of the electrochromic device is selected from rectangles, squares, circles, polygons, or irregular shapes and combinations thereof.

Images