An electrochromic device and an electrochromic apparatus

Abstract

The application provides an electrochromic device and an electrochromic apparatus, and relates to the technical field of electrochromic technology. The electrochromic device comprises a first surface and a second surface arranged oppositely along the thickness direction, and a first bus bar, a second bus bar, a first lead electrode and a second lead electrode; the electrochromic device is provided with a plurality of first grooves on the first surface and a plurality of second grooves on the second surface; on one side of the first surface, a first partition area is formed between two adjacent first grooves; on one side of the second surface, a second partition area is formed between two adjacent second grooves; the first lead electrode comprises a first connecting part connected with the first bus bar, and the first connecting part is located in the first partition area; the second lead electrode comprises a second connecting part connected with the second bus bar, and the second connecting part is located in the second partition area. The connecting performance of the lead electrode in the electrochromic device is not prone to decline, and the overall reliability is higher.

Description

Technical Field

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

[0002] An electrochromic device is a device that can change color under the influence of voltage. It consists of two conductive layers and an electrochromic layer disposed between them. When the two conductive layers are connected to an external power source, an electric field is generated between them. Under the influence of this electric field, the electrochromic layer undergoes a redox reaction, resulting in the entire electrochromic device changing color.

[0003] In electrochromic devices, the lead-out electrode is a key component that connects to an external power source and drives the electrochromic device to change color. However, the lead-out electrode is susceptible to contamination by other substances in the operating environment, which can cause its connection performance to decline and thus affect the overall reliability of the electrochromic device. Utility Model Content

[0004] In order to address the problems existing in the prior art, one of the objectives of this application is to provide an electrochromic device.

[0005] This application provides the following technical solution: An electrochromic device, the electrochromic device includes a first surface and a second surface disposed opposite to each other along the thickness direction, and further includes a first busbar, a second busbar, a first lead-out electrode and a second lead-out electrode; The electrochromic device has a plurality of first grooves on the first surface and a plurality of second grooves on the second surface, and the first grooves and the second grooves are alternately arranged along the outer periphery of the electrochromic device. The first busbar is disposed on one side of the first surface and contacts the first electrode in the plurality of first grooves; the second busbar is disposed on one side of the second surface and contacts the second electrode in the plurality of second grooves. On one side of the first surface, a first partition area is formed between two adjacent first grooves; on one side of the second surface, a second partition area is formed between two adjacent second grooves. The first lead-out electrode includes a first connection portion connected to the first busbar, the first connection portion being located in the first partition area; the second lead-out electrode includes a second connection portion connected to the second busbar, the second connection portion being located in the second partition area.

[0006] As a further optional embodiment of the electrochromic device, the length of the first partition region where the first connection portion is located is greater than the length of the other first partition regions; and / or, The length of the second partition area where the second connecting part is located is greater than the length of the other second partition areas.

[0007] As a further optional embodiment of the electrochromic device, along the edge extension direction of the electrochromic device, the distance between the first lead-out electrode and the edge of the first partition region is L1, where L1 ≥ 5 mm; and / or, Along the edge extension direction of the electrochromic device, the distance between the second lead electrode and the edge of the second partition area is L2, where L2 ≥ 5 mm.

[0008] As a further optional embodiment of the electrochromic device, the first lead electrode further includes a first conductive portion and a first transition portion, wherein the first conductive portion is connected to the first connecting portion through the first transition portion. The second lead electrode further includes a second conductive part and a second transition part, wherein the second conductive part is connected to the second connecting part through the second transition part; The first conductive part and the second conductive part are respectively used to connect to an external power source.

[0009] As a further alternative to the electrochromic device, the first partition area where the first connection portion is located is adjacent to the second partition area where the second connection portion is located.

[0010] As a further optional solution for the electrochromic device, a first insulating layer is respectively provided on both sides of the first lead electrode along the thickness direction. The first insulating layer has a first window and a second window, at least a portion of the first connection portion is exposed in the first window, and at least a portion of the first conductive portion is exposed in the second window. The second lead electrode has a second insulating layer on each of its two sides along the thickness direction. The second insulating layer has a third window and a fourth window. At least a portion of the second connection portion is exposed in the third window, and at least a portion of the second conductive portion is exposed in the fourth window.

[0011] As a further optional embodiment of the electrochromic device, the first lead electrode further includes a first detection section and a second detection section, one end of the first detection section and one end of the second detection section are respectively located on both sides of the first connecting section and exposed in the first window, and the other ends of the first detection section and the second detection section are respectively located on both sides of the first conducting section and exposed in the second window; and / or, The second lead electrode further includes a third detection part and a fourth detection part. One end of the third detection part and one end of the fourth detection part are respectively located on both sides of the second connection part and exposed in the third window. The other end of the third detection part and the other end of the fourth detection part are respectively located on both sides of the second conductive part and exposed in the fourth window.

[0012] As a further optional embodiment of the electrochromic device, the electrochromic device includes a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second substrate layer stacked sequentially. The first groove penetrates the first substrate layer, the first conductive layer, and the electrochromic layer, and the second conductive layer exposed in the first groove forms the first electrode; The second groove penetrates the second base layer, the second conductive layer, and the electrochromic layer, and the first conductive layer exposed in the second groove forms the second electrode; The electrochromic device also has multiple through slots, which extend from the first surface to the second surface through the electrochromic device and connect adjacent first and second grooves. An insulating part is provided in the through groove, and the insulating part separates the first busbar and the second busbar.

[0013] As a further optional embodiment of the electrochromic device, one end of the insulating portion extends into the first partition region and overlaps with the first substrate layer; the insulating portion and the first connecting portion are misaligned in the projection of the electrochromic device in the thickness direction; and / or, The other end of the insulating portion extends into the second partition area and overlaps with the second base layer. The insulating portion and the second connecting portion are misaligned in the thickness direction of the electrochromic device.

[0014] Another objective of this application is to provide an electrochromic device.

[0015] This application provides the following technical solution: An electrochromic device includes a first substrate layer, a second substrate layer, and the electrochromic device, wherein the first substrate layer, the electrochromic device, and the second substrate layer are stacked together.

[0016] The embodiments of this application have the following beneficial effects: In the aforementioned electrochromic device, cross-sections are formed at the first and second grooves, causing gel-like substances within the device to precipitate from these cross-sections and spread to other areas. Since the first connection portion of the first lead electrode, connected to the first busbar, is located in the first isolation region—that is, between two adjacent first grooves—and thus deviates from the cross-section at the first groove, the substances precipitated at this cross-section are less likely to directly contact the first connection portion as they spread outwards, reducing the risk of damage to the first connection portion. Similarly, since the second connection portion of the second lead electrode, connected to the second busbar, is located in the second isolation region—that is, between two adjacent second grooves—and thus deviates from the cross-section at the second groove, the substances precipitated at this cross-section are less likely to directly contact the second connection portion as they spread outwards, reducing the risk of damage to the second connection portion. Therefore, the connection performance of the lead electrodes in the aforementioned electrochromic device is less likely to deteriorate, and consequently, the conductivity of the electrochromic device is less likely to be affected, resulting in higher overall reliability.

[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This illustration shows a structural schematic diagram of an electrochromic device provided in an embodiment of this application; Figure 2 A top view of an electrochromic device provided in an embodiment of this application is shown; Figure 3 This illustration shows a partial structural diagram of an electrochromic device after grooving, according to an embodiment of this application. Figure 4 A schematic diagram of the structure of an electrochromic device according to another embodiment of this application is shown; Figure 5 This illustration shows a schematic diagram of the structure of the first lead-out electrode in an electrochromic device according to an embodiment of this application; Figure 6 A schematic diagram of the structure of the first lead-out electrode in an electrochromic device provided in another embodiment of this application is shown.

[0020] Explanation of key component symbols: 10-Electrochromic device; 10a-First groove; 10b-Second groove; 10c-First partition area; 10d-Second partition area; 10e-Through groove; 10f-Insulating part; 100 - First substrate layer; 101 - First surface; 200 - First conductive layer; 201 - Second electrode; 300 - Electrochromic layer; 400 - Second conductive layer; 401 - First electrode; 500 - Second substrate layer; 501 - Second surface; 600 - First busbar; 700 - Second busbar; 800 - First lead electrode; 810 - First connection portion; 820 - First conductive portion; 830 - First transition portion; 840 - First insulating layer; 841 - First window; 842 - Second window; 850 - First detection portion; 860 - Second detection portion; 900 - Second lead electrode; 910 - Second connection portion. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] This embodiment provides an electrochromic device; please refer to the following: Figure 1 and Figure 2 The electrochromic device 10 includes a first surface 101 and a second surface 501 disposed opposite to each other along the thickness direction, and also includes a first busbar 600, a second busbar 700, a first lead-out electrode 800 and a second lead-out electrode 900.

[0027] The electrochromic device 10 has a plurality of first grooves 10a on the first surface 101 and a plurality of second grooves 10b on the second surface 501, with the first grooves 10a and the second grooves 10b alternately arranged along the outer periphery of the electrochromic device 10.

[0028] Accordingly, the first busbar 600 is disposed on one side of the first surface 101, and the first busbar 600 contacts the first electrode 401 in the plurality of first grooves 10a. The second busbar 700 is disposed on one side of the second surface 501, and the second busbar 700 contacts the second electrode 201 in the plurality of second grooves 10b.

[0029] Furthermore, on one side of the first surface 101, a first partition region 10c is formed between two adjacent first grooves 10a. On one side of the second surface 501, a second partition region 10d is formed between two adjacent second grooves 10b.

[0030] Accordingly, the first lead-out electrode 800 includes a first connection portion 810 connected to the first busbar 600, and the first connection portion 810 is located in the first partition region 10c. The second lead-out electrode 900 includes a second connection portion 910 connected to the second busbar 700, and the second connection portion 910 is located in the second partition region 10d.

[0031] In the electrochromic device 10 described above, cross-sections are formed at the first groove 10a and the second groove 10b, causing gel-like substances within the electrochromic device 10 to precipitate from these cross-sections and spread to other areas. Since the first connecting portion 810 of the first lead electrode 800, which connects to the first busbar 600, is located in the first partition region 10c, that is, between two adjacent first grooves 10a, and thus deviates from the cross-section at the first groove 10a, the substances precipitated at this cross-section are less likely to directly contact the first connecting portion 810 as they spread outwards, reducing the risk of damage to the first connecting portion 810. Similarly, since the second connecting portion 910 of the second lead electrode 900, which connects to the second busbar 700, is located in the second partition region 10d, that is, between two adjacent second grooves 10b, and thus deviates from the cross-section at the second groove 10b, the substances precipitated at this cross-section are less likely to directly contact the second connecting portion 910 as they spread outwards, reducing the risk of damage to the second connecting portion 910. Therefore, the connection performance of the lead-out electrodes in the electrochromic device 10 is not easily degraded, and the conduction function of the electrochromic device 10 is not easily affected, resulting in higher overall reliability.

[0032] Please combine Figure 3 In some embodiments, the electrochromic device 10 includes a first substrate layer 100, a first conductive layer 200, an electrochromic layer 300, a second conductive layer 400, and a second substrate layer 500 stacked sequentially.

[0033] Specifically, the first substrate layer 100, the first conductive layer 200, the electrochromic layer 300, the second conductive layer 400, and the second substrate layer 500 are stacked sequentially along the thickness direction of the electrochromic device 10. The first surface 101 is the surface of the first substrate layer 100 facing away from the first conductive layer 200, and the second surface 501 is the surface of the second substrate layer 500 facing away from the second conductive layer 400.

[0034] At the same time, the first groove 10a penetrates the first base layer 100, the first conductive layer 200 and the electrochromic layer 300, and the second conductive layer 400 exposed in the first groove 10a forms the first electrode 401.

[0035] The second groove 10b penetrates the second base layer 500, the second conductive layer 400 and the electrochromic layer 300, and the first conductive layer 200 exposed in the second groove 10b forms the second electrode 201.

[0036] Understandably, after forming multiple first grooves 10a on the first surface 101, multiple first electrodes 401 are formed, each of which is part of the second conductive layer 400; after forming multiple second grooves 10b on the second surface 501, multiple second electrodes 201 are formed, each of which is part of the first conductive layer 200. Since the first grooves 10a and the second grooves 10b are alternately arranged along the outer periphery of the electrochromic device 10, the first electrodes 401 and the second electrodes 201 are also alternately arranged along the outer periphery of the electrochromic device 10, thereby forming a multi-electrode structure. Based on this, the first busbar 600 contacts the first electrodes 401 within multiple first grooves 10a, meaning the first busbar 600 simultaneously contacts and conducts electricity with multiple different areas on the edge of the second conductive layer 400. Similarly, the second busbar 700 contacts the second electrodes 201 within multiple second grooves 10b, meaning the second busbar 700 simultaneously contacts and conducts electricity with multiple different areas on the edge of the first conductive layer 200. This accelerates the color-changing speed of the electrochromic device 10. This is particularly effective in large-area devices such as curtain walls and car windows, significantly improving the color-changing speed.

[0037] In addition, the electrochromic device 10 is provided with a plurality of through slots 10e. The through slots 10e extend through the electrochromic device 10 from the first surface 101 to the second surface 501, and connect adjacent first grooves 10a and second grooves 10b. An insulating part 10f is provided in the through slots 10e, and the insulating part 10f separates the first busbar 600 and the second busbar 700.

[0038] It should be noted that, since the first groove 10a and the second groove 10b are alternately arranged along the outer periphery of the electrochromic device 10, and a through groove 10e is provided between the first groove 10a and each of the two adjacent second grooves 10b, the edge of the first surface 101 is sequentially provided with the first groove 10a, the through groove 10e, the first partition area 10c, the through groove 10e, the first groove 10a, and so on. At this time, the first partition area 10c is actually located between two adjacent through grooves 10e.

[0039] Similarly, the edge of the second surface 501 is sequentially provided with a second groove 10b, a through groove 10e, a second partition area 10d, a through groove 10e, a second groove 10b, and so on. At this time, the second partition area 10d is actually located between two adjacent through grooves 10e.

[0040] On one side, the first busbar 600 is disposed on one side of the first surface 101, extends circumferentially along the electrochromic device 10, and sequentially contacts the bottom of the first groove 10a (that is, the first electrode 401 formed by the exposure of the second conductive layer 400), the insulating portion 10f, and the first isolation region 10c. The second busbar 700 is disposed on one side of the second surface 501, extends circumferentially along the electrochromic device 10, and sequentially contacts the bottom of the second groove 10b (that is, the second electrode 201 formed by the exposure of the first conductive layer 200), the insulating portion 10f, and the second isolation region 10d.

[0041] On the other hand, the cross-section formed at the first groove 10a specifically refers to the cross-section of the electrochromic layer 300 at the first groove 10a after the first groove 10a penetrates the electrochromic layer 300. Similarly, the cross-section formed at the second groove 10b specifically refers to the cross-section of the electrochromic layer 300 at the second groove 10b after the second groove 10b penetrates the electrochromic device 10, including the electrochromic layer 300. Since the through groove 10e penetrates the electrochromic device 10, including the electrochromic layer 300, the electrochromic layer 300 also forms a cross-section at the through groove 10e. During use, some of the material within the electrochromic layer 300 will precipitate from these three types of cross-sections. Because the first connection portion 810 of the first lead-out electrode 800, which connects to the first busbar 600, is located in the first isolation region 10c, it is offset from the cross-section of the electrochromic layer 300 at the first groove 10a and through groove 10e. Therefore, the material precipitated at this cross-section is less likely to directly contact the first connection portion 810 when it spreads outward, thus reducing the risk of damage to the first connection portion 810. Similarly, because the second connection portion 910 of the second lead-out electrode 900, which connects to the second busbar 700, is located in the second isolation region 10d, it is offset from the cross-section of the electrochromic layer 300 at the second groove 10b and through groove 10e. Therefore, the material precipitated at this cross-section is less likely to directly contact the second connection portion 910 when it spreads outward, thus reducing the risk of damage to the second connection portion 910.

[0042] In this embodiment, the first busbar 600 and the second busbar 700 can be made of conductive materials well known to those skilled in the art, such as at least one of copper foil, conductive silver paste, conductive copper paste, conductive carbon paste, nano silver, conductive ink, copper wire, and conductive film.

[0043] The first lead electrode 800 and the second lead electrode 900 can be flexible printed circuit boards (FPCs), rolled copper foil / aluminum foil, electrolytic copper foil / aluminum foil, etc. The material can be aluminum, copper, silver, tin or other conductive metal elements, non-metallic semiconductor conductive materials or their coatings or other conductive metal oxides or combinations thereof.

[0044] Both the first substrate layer 100 and the second substrate layer 500 are transparent substrates. The transparent substrate is an optically grade transparent material, specifically a flexible substrate material, such as polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI), cyclic olefin copolymers, or cellulose triacetate. Alternatively, the first substrate layer 100 and the second substrate layer 500 can also be glass substrates.

[0045] Both the first conductive layer 200 and the second conductive layer 400 are transparent conductive layers. The material of the transparent conductive layer can be any transparent conductive material well known to those skilled in the art, such as indium-tin oxide (ITO), aluminum zinc oxide (AZO), fluorine-doped tin oxide (FTO), silver nanowires, graphene, carbon nanotubes, metal meshes, or silver nanoparticles.

[0046] The electrochromic layer 300 is a sheet composed of one or more layers of gel-state or solid materials, such as polymer-dispersed liquid crystal (PDLC), suspended particle device (SPD), and electrochromic (EC) layers. For the electrochromic type electrochromic layer 300, it may include a color-changing material layer, an electrolyte layer, and an ion storage layer stacked sequentially. The materials of the color-changing material layer, electrolyte layer, and ion storage layer can be those found in the prior art, and this embodiment does not impose any special limitations on them.

[0047] Please see Figure 1 In some embodiments, the insulating portion 10f is completely located within the through groove 10e.

[0048] Please see Figure 4 In other embodiments, one end of the insulating portion 10f extends into the first partition region 10c and overlaps with the first base layer 100. The insulating portion 10f and the first connecting portion 810 are misaligned in the thickness direction of the electrochromic device 10.

[0049] Similarly, the other end of the insulating portion 10f extends into the second partition region 10d and overlaps with the second base layer 500. The insulating portion 10f and the second connecting portion 910 are misaligned in the thickness direction of the electrochromic device 10.

[0050] Alternatively, one end of the insulating portion 10f overlaps with the first base layer 100, and the other end overlaps with the second conductive layer 400 exposed in the first groove 10a, so as to facilitate the installation of the insulating layer.

[0051] Alternatively, one end of the insulating part 10f overlaps with the second base layer 500, and the other end overlaps with the first conductive layer 200 exposed in the second groove 10b, which also facilitates the installation of the insulating layer.

[0052] Furthermore, in some embodiments, the length of the first partition area 10c where the first connecting portion 810 is located is greater than the length of other first partition areas 10c.

[0053] At this time, while ensuring that the contact area between the first connecting portion 810 of the first lead electrode 800 and the first busbar 600 is not reduced, that is, while ensuring that the conductivity at the first lead electrode 800 is not affected, the first connecting portion 810 can be made farther away from the through groove 10e and the first groove 10a. This allows the precipitated material to reach the first connecting portion 810 from a greater distance, making it less likely for the precipitated material to directly contact the first connecting portion 810 when it spreads outward, thereby further reducing the risk of damage to the first connecting portion 810.

[0054] Understandably, after determining the placement position of the first lead electrode 800, the length of the second groove 10b at the corresponding position is increased, so that after cutting out the first groove 10a, the second groove 10b and the through groove 10e, a longer first partition area 10c is formed, so that the first connecting part 810 can connect to the first busbar 600 in the first partition area 10c.

[0055] Similarly, the length of the second partition zone 10d where the second connecting part 910 is located is greater than the length of the other second partition zones 10d.

[0056] At this time, while ensuring that the contact area between the second connection portion 910 of the second lead electrode 900 and the second busbar 700 is not reduced, that is, while ensuring that the conductivity at the second lead electrode 900 is not affected, the second connection portion 910 can be made farther away from the through groove 10e and the second groove 10b, thereby making the distance for the precipitated material to reach the second connection portion 910 farther. When the precipitated material spreads outward, it is less likely to directly contact the second connection portion 910, which can further reduce the risk of damage to the second connection portion 910.

[0057] Understandably, after determining the placement position of the second lead electrode 900, the length of the first groove 10a at the corresponding position is increased, so that a longer second partition area 10d is formed after cutting out the first groove 10a, the second groove 10b and the through groove 10e, so that the second connecting part 910 can connect to the second busbar 700 in the second partition area 10d.

[0058] In some embodiments, along the edge extension direction of the electrochromic device, the distance between the first lead electrode 800 and the edge of the first partition region 10c is L1, which satisfies L1≥5mm.

[0059] As mentioned above, in some embodiments, the first partition region 10c is actually located between two adjacent through slots 10e. Therefore, the distance between the first lead electrode 800 and the edge of the first partition region 10c specifically refers to the distance between the first connection portion 810 and the adjacent through slot 10e. Ensuring that the distance between the first connection portion 810 and the adjacent through slot 10e is not less than 5mm makes it less likely for the precipitated material to directly contact the first connection portion 810 when it diffuses outward.

[0060] For example, the distance between the first lead-out electrode 800 and the edge of the first partition region 10c is 5-20 mm.

[0061] Similarly, along the edge extension direction of the electrochromic device, the distance between the second lead electrode 900 and the edge of the second partition region 10d is L2, where L2 ≥ 5 mm.

[0062] As mentioned above, in some embodiments, the second partition region 10d is actually located between two adjacent through slots 10e. Therefore, the distance between the second lead electrode 900 and the edge of the second partition region 10d specifically refers to the distance between the second connection portion 910 and the adjacent through slot 10e. Ensuring that the distance between the second connection portion 910 and the adjacent through slot 10e is not less than 5 mm makes it less likely for the precipitated material to directly contact the second connection portion 910 as it diffuses outwards.

[0063] For example, the distance between the second lead electrode 900 and the edge of the second partition region 10d is 5-20 mm.

[0064] Please see Figure 5 In some embodiments, the first lead electrode 800 further includes a first conducting part 820 and a first transition part 830, wherein the first conducting part 820 is connected to the first connecting part 810 through the first transition part 830.

[0065] In addition, the second lead electrode 900 also includes a second conductive part and a second transition part, and the second conductive part is connected to the second connecting part 910 through the second transition part.

[0066] The first conductive part 820 and the second conductive part are respectively used to connect to an external power source.

[0067] Understandably, maintaining a sufficient distance between the first connecting portion 810 and the edge of the first partition region 10c, and maintaining a sufficient distance between the second connecting portion 910 and the edge of the second partition region 10d, makes it less likely for the precipitated material to directly contact the first connecting portion 810 and the second connecting portion 910 when it spreads outward, and also makes the distance between the first connecting portion 810 and the second connecting portion 910 relatively large.

[0068] Based on this, a first transition section 830 is provided to connect the first connecting section 810 and the first conductive section 820, and a second transition section is provided to connect the second connecting section 910 and the second conductive section. This ensures that the distance between the first conductive section 820 and the second conductive section is not affected by the distance between the first connecting section 810 and the second connecting section 910, thereby making the distance between the first conductive section 820 and the second conductive section relatively fixed. When the first conductive section 820 and the second conductive section are connected to an external power source through an external conductive component, the two interfaces of the external conductive component connecting the first conductive section 820 and the second conductive section are set to a fixed distance, thereby achieving standardized customization of the external conductive component. At this time, using the same external conductive component, it is possible to quickly bring out electrochromic devices 10 of different types (specifically, the distance between the first connecting section 810 and the second connecting section 910 is different), simplifying the production process.

[0069] For example, the first lead electrode 800 is formed by bonding copper foil to two surfaces of a PI substrate and then electroplating copper. In this case, the first connecting portion 810, the first transition portion 830, and the first conductive portion 820 are integrally formed. Figure 5 The image is divided by a dashed line.

[0070] Similarly, the second connecting part 910, the second transition part, and the second conductive part are also integrally formed.

[0071] Furthermore, in some embodiments, the first partition area 10c where the first connecting portion 810 is located is adjacent to the second partition area 10d where the second connecting portion 910 is located.

[0072] At this point, provided that the connecting part and the edge of the partition area are kept at a sufficient distance, the distance between the first connecting part 810 and the second connecting part 910 is the shortest. It is not necessary to set an excessively long first transition part 830 and second transition part to make the distance between the first conductive part 820 and the second conductive part relatively close, which simplifies the production process.

[0073] Please see Figure 6In some embodiments, a first insulating layer 840 is provided on both sides of the first lead electrode 800 along the thickness direction, and the first insulating layer 840 has a first window 841 and a second window 842. At least a portion of the first connecting portion 810 is exposed in the first window 841, and at least a portion of the first conducting portion 820 is exposed in the second window 842.

[0074] In use, the first insulating layer 840 provides insulation protection for the first lead electrode 800, preventing it from contacting and conducting with other conductive components besides the first busbar 600 and the external power supply. Accordingly, at least a portion of the first connecting portion 810 exposed in the first window 841 can be connected to the first busbar 600, and at least a portion of the first conducting portion 820 exposed in the second window 842 can be connected to the external power supply.

[0075] For example, the first insulating layer 840 may be a PI cover film and is adhered to the surface of the first lead electrode 800 by adhesive.

[0076] Similarly, a second insulating layer (not shown in the figure) is provided on each of the two sides of the second lead electrode 900 along the thickness direction. The second insulating layer has a third window and a fourth window. At least a portion of the second connection portion 910 is exposed in the third window, and at least a portion of the second conductive portion is exposed in the fourth window.

[0077] In use, the second insulating layer provides insulation protection for the second lead electrode 900, preventing it from contacting and conducting with other conductive components besides the second busbar 700 and the external power supply. Accordingly, at least a portion of the second connection portion 910 exposed in the third window can be connected to the second busbar 700, and at least a portion of the second conductive portion exposed in the fourth window can be connected to the external power supply.

[0078] Please refer to the following: Figure 5 and Figure 6 Furthermore, in some embodiments, the first lead electrode 800 further includes a first detection section 850 and a second detection section 860. One end of the first detection section 850 and one end of the second detection section 860 are respectively located on both sides of the first connecting section 810 and exposed in the first window 841. The other ends of the first detection section 850 and the second detection section 860 are respectively located on both sides of the first conducting section 820 and exposed in the second window 842.

[0079] When preparing the electrochromic device 10, the first detection part 850 exposed at one end of the first window 841 and the second detection part 860 exposed at one end of the first window 841 are connected together with the first connection part 810 to the first busbar 600, and then the impedance value between the other end of the first detection part 850 and the other end of the second detection part 860 is detected.

[0080] If the impedance value is very small, it indicates that the first detection unit 850 and the first busbar 600, and the second detection unit 860 and the first busbar 600 are in good contact, which in turn indicates that the first connection unit 810 located between the first detection unit 850 and the second detection unit 860 is also in good contact with the first busbar 600.

[0081] Conversely, if the impedance value is very large, it indicates that at least one of the first detection unit 850 and the second detection unit 860 is not in good contact with the first busbar 600, which in turn indicates that the first connection unit 810 and the first busbar 600 may be not in good contact.

[0082] Similarly, in some embodiments, the second lead electrode 900 further includes a third detection section and a fourth detection section. One end of the third detection section and one end of the fourth detection section are located on both sides of the second connection section 910 and are exposed through the third window. The other ends of the third detection section and the fourth detection section are located on both sides of the second conductive section and are exposed through the fourth window.

[0083] When preparing the electrochromic device 10, the end of the third detection unit exposed in the third window and the end of the fourth detection unit exposed in the third window are connected together with the second connection unit 910 to the second busbar 700, and then the impedance value between the other end of the third detection unit and the other end of the fourth detection unit is detected.

[0084] If the impedance value is very small, it indicates that the third detection unit and the second busbar 700 and the fourth detection unit and the second busbar 700 are in good contact, which in turn indicates that the second connection unit 910 located between the third detection unit and the fourth detection unit is also in good contact with the second busbar 700.

[0085] Conversely, if the impedance value is very large, it indicates that at least one of the third and fourth detection units is not in good contact with the second busbar 700, which in turn indicates that the second connection 910 and the second busbar 700 may be not in good contact.

[0086] In summary, in the electrochromic device 10 described above, the first groove 10a, the second groove 10b, and the through groove 10e all penetrate the electrochromic layer 300, causing the electrochromic layer 300 to form cross-sections at the first groove 10a, the second groove 10b, and the through groove 10e, respectively. This results in gel-like substances within the electrochromic layer 300 precipitating out from the cross-sections and spreading to other areas. Since the first connecting portion 810 in the first lead electrode 800, which is connected to the first busbar 600, is located in the first partition region 10c, thus deviating from the cross-sections at the first groove 10a and the through groove 10e, the substances precipitated at these cross-sections are less likely to directly contact the first connecting portion 810 when spreading outwards, thereby reducing the risk of damage to the first connecting portion 810. Similarly, since the second connection portion 910 of the second lead electrode 900, which connects to the second busbar 700, is located in the second partition region 10d, and thus offsets from the cross-section at the second groove 10b and through groove 10e, the material precipitated at this cross-section is less likely to directly contact the second connection portion 910 when it spreads outward, thereby reducing the risk of damage to the second connection portion 910. Therefore, the connection performance of the lead electrode in the electrochromic device 10 is less likely to deteriorate, and consequently, the conduction function of the electrochromic device 10 is less likely to be affected, resulting in higher overall reliability and improving the problem of color-changing function degradation or even failure.

[0087] This embodiment also provides an electrochromic device, including a first substrate layer, a second substrate layer and the electrochromic device 10, wherein the first substrate layer, the electrochromic device 10 and the second substrate layer are stacked.

[0088] It should be noted that, when projected along the thickness direction of the electrochromic device, the first substrate layer and the second substrate layer completely cover the electrochromic device 10.

[0089] In this embodiment, both the first substrate layer and the second substrate layer are transparent structures. For example, the first substrate layer and the second substrate layer can be transparent glass, transparent acrylic sheet, or transparent PVC sheet, etc.

[0090] For example, the first substrate layer and the second substrate layer are glass. By sandwiching the electrochromic device 10 between the first substrate layer and the second substrate layer and applying sealant around the electrochromic device 10, a sealed electrochromic device can be formed, preventing the electrochromic device 10 from contacting external moisture and oxygen, thereby improving the service life of the electrochromic device 10 and the service life of the electrochromic device.

[0091] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0092] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0093] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. An electrochromic device, characterized in that, The electrochromic device includes a first surface (101) and a second surface (501) arranged opposite to each other along the thickness direction, and also includes a first busbar (600), a second busbar (700), a first lead-out electrode (800), and a second lead-out electrode (900). The electrochromic device has a plurality of first grooves (10a) on the first surface (101) and a plurality of second grooves (10b) on the second surface (501), and the first grooves (10a) and the second grooves (10b) are alternately arranged along the outer periphery of the electrochromic device; The first busbar (600) is disposed on one side of the first surface (101), and the first busbar (600) contacts the first electrode (401) in the plurality of first grooves (10a); the second busbar (700) is disposed on one side of the second surface (501), and the second busbar (700) contacts the second electrode (201) in the plurality of second grooves (10b); On one side of the first surface (101), a first partition area (10c) is formed between two adjacent first grooves (10a); on one side of the second surface (501), a second partition area (10d) is formed between two adjacent second grooves (10b). The first lead-out electrode (800) includes a first connection portion (810) connected to the first busbar (600), the first connection portion (810) being located in the first partition area (10c), and the second lead-out electrode (900) includes a second connection portion (910) connected to the second busbar (700), the second connection portion (910) being located in the second partition area (10d).

2. The electrochromic device according to claim 1, characterized in that, The length of the first partition area (10c) where the first connecting portion (810) is located is greater than the length of the other first partition areas (10c); and / or, The length of the second partition area (10d) where the second connecting part (910) is located is greater than the length of the other second partition areas (10d).

3. The electrochromic device according to claim 1, characterized in that, Along the edge extension direction of the electrochromic device, the distance between the first lead electrode (800) and the edge of the first partition region (10c) is L1, where L1 ≥ 5 mm; and / or, Along the edge extension direction of the electrochromic device, the distance between the second lead electrode (900) and the edge of the second partition region (10d) is L2, where L2 ≥ 5 mm.

4. The electrochromic device according to any one of claims 1-3, characterized in that, The first lead electrode (800) further includes a first conductive part (820) and a first transition part (830), wherein the first conductive part (820) is connected to the first connecting part (810) through the first transition part (830); The second lead electrode (900) further includes a second conductive part and a second transition part, wherein the second conductive part is connected to the second connecting part (910) through the second transition part; The first conductive part (820) and the second conductive part are respectively used to connect to an external power source.

5. The electrochromic device according to claim 4, characterized in that, The first partition area (10c) where the first connecting part (810) is located is adjacent to the second partition area (10d) where the second connecting part (910) is located.

6. The electrochromic device according to claim 4, characterized in that, The first lead electrode (800) has a first insulating layer (840) on each of its two sides along the thickness direction. The first insulating layer (840) has a first window (841) and a second window (842). At least a portion of the first connecting portion (810) is exposed in the first window (841), and at least a portion of the first conducting portion (820) is exposed in the second window (842). The second lead electrode (900) has a second insulating layer on each of its two sides along the thickness direction. The second insulating layer has a third window and a fourth window. At least a portion of the second connection portion (910) is exposed in the third window, and at least a portion of the second conductive portion is exposed in the fourth window.

7. The electrochromic device according to claim 6, characterized in that, The first lead-out electrode (800) further includes a first detection section (850) and a second detection section (860). One end of the first detection section (850) and one end of the second detection section (860) are respectively located on both sides of the first connecting section (810) and exposed in the first window (841). The other ends of the first detection section (850) and the other ends of the second detection section (860) are respectively located on both sides of the first conducting section (820) and exposed in the second window (842); and / or, The second lead electrode (900) further includes a third detection part and a fourth detection part. One end of the third detection part and one end of the fourth detection part are respectively located on both sides of the second connection part (910) and exposed in the third window. The other end of the third detection part and the other end of the fourth detection part are respectively located on both sides of the second conductive part and exposed in the fourth window.

8. The electrochromic device according to claim 1, characterized in that, The electrochromic device comprises a first substrate layer (100), a first conductive layer (200), an electrochromic layer (300), a second conductive layer (400), and a second substrate layer (500) stacked sequentially. The first groove (10a) penetrates the first substrate layer (100), the first conductive layer (200) and the electrochromic layer (300), and the second conductive layer (400) exposed in the first groove (10a) forms the first electrode (401). The second groove (10b) penetrates the second substrate layer (500), the second conductive layer (400) and the electrochromic layer (300), and the first conductive layer (200) exposed in the second groove (10b) forms the second electrode (201). The electrochromic device is also provided with a plurality of through slots (10e), which extend from the first surface (101) to the second surface (501) through the electrochromic device, and the through slots (10e) connect adjacent first grooves (10a) and second grooves (10b). An insulating part (10f) is provided in the through groove (10e), and the insulating part (10f) separates the first busbar (600) and the second busbar (700).

9. The electrochromic device according to claim 8, characterized in that, One end of the insulating portion (10f) extends into the first partition region (10c) and overlaps with the first substrate layer (100). The insulating portion (10f) and the first connecting portion (810) are misaligned in the projection of the electrochromic device in the thickness direction; and / or, The other end of the insulating part (10f) extends into the second partition area (10d) and overlaps with the second base layer (500). The insulating part (10f) and the second connecting part (910) are misaligned in the projection of the electrochromic device in the thickness direction.

10. An electrochromic device, characterized in that, It includes a first substrate layer, a second substrate layer, and an electrochromic device as described in any one of claims 1-9, wherein the first substrate layer, the electrochromic device, and the second substrate layer are stacked together.

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