CN220569048U

CN220569048U - Electrochromic diaphragm, electrochromic device and terminal product

Info

Publication number: CN220569048U
Application number: CN202322194159.9U
Authority: CN
Inventors: 王美娟; 熊羽生; 孙飞; 赵强
Original assignee: Guangyi Intelligent Technology Suzhou Co ltd
Current assignee: Guangyi Intelligent Technology Suzhou Co ltd
Priority date: 2023-08-15
Filing date: 2023-08-15
Publication date: 2024-03-08
Anticipated expiration: 2033-08-15

Abstract

The application provides an electrochromic diaphragm, a color-changing device and a terminal product, and belongs to the technical field of electrochromic. The electrochromic film comprises an edge part, wherein the edge part is electrically connected with a bus bar; the edge portion includes a straight edge portion and a corner portion, and an insulating portion is provided between the conductive layer of the corner portion and the bus bar to form an insulating structure between the conductive layer of the corner portion and the bus bar. Through setting up the insulating part at the corner of electrochromic diaphragm to form insulation structure between busbar and electrochromic diaphragm through this insulating part, with prevent that the busbar from directly contacting with the corner, when the busbar forms the electricity with external power source and is connected, can effectively prevent that the electric current of external power source from directly passing to the corner through the busbar, reduce the electric field intensity of corner in the charge-discharge process, reduce the damage that the electric field superposes at the corner and bring, in order to promote the life of electrochromic diaphragm.

Description

Electrochromic diaphragm, electrochromic device and terminal product

Technical Field

The application relates to the technical field of electrochromic, in particular to an electrochromic membrane, a electrochromic device and a terminal product.

Background

Electrochromic is a technology in which an electrochromic material is reversibly and stably colored or discolored under the action of an external voltage. In general, by providing bus bars on both base layers of an electrochromic film, the electrochromic film is electrically connected to an external power supply through the bus bars, thereby forming voltages at both ends of the electrochromic material, so that the electrochromic material of the electrochromic film changes in color in response to the change of the voltages at both ends.

In order to ensure that all areas of the whole electrochromic device can realize complete color change, the electrochromic device is continuously charged/discharged. The electrochromic device of the prior art is susceptible to failure by damage in the corner areas of the electrochromic device after long-term repeated charge/discharge.

Disclosure of Invention

In view of the foregoing, an object of the present application is to overcome the defects in the prior art, and to provide an electrochromic film, a electrochromic device and an end product.

The application provides the following technical scheme: an electrochromic film comprising an edge portion, the edge portion being electrically connected with a bus bar;

the edge portion includes a straight edge portion and a corner portion with an insulating portion between the conductive layer of the corner portion and the bus bar to form an insulating structure between the conductive layer of the corner portion and the bus bar.

Further, the straight edge portions are provided with straight edge electrodes at intervals, and polarities of the straight edge electrodes adjacent to the corner portions are the same.

Further, the electrochromic film comprises a first substrate layer, a first conductive layer, an electrochromic material layer, an electrolyte layer, an ion storage layer, a second conductive layer and a second substrate layer which are sequentially stacked;

the straight edge part is provided with a plurality of straight edge grooves at intervals, the straight edge grooves comprise first grooves adjacent to the corner parts, and the first grooves penetrate through the first basal layer, the first conductive layer, the electrochromic material layer, the electrolyte layer and the ion storage layer.

Further, the length of the insulating part is greater than the length of the straight-edge electrode.

Further, the corner portion is provided with a corner groove;

the corner groove penetrates through the first substrate layer, the first conductive layer, the electrochromic material layer, the electrolyte layer and the ion storage layer, and two ends of the corner groove protrude out of the insulating part towards the extending direction of the corner part; alternatively, the corner groove penetrates through the second base layer, the second conductive layer, the ion storage layer, the electrolyte layer, and the electrochromic material layer, and the insulating part completely covers the corner groove.

the insulating portion includes the first and/or second base layers of the corner portion.

Further, a portion of the bus bar connected to the corner portion is an arc-shaped section;

and the central angle corresponding to the arc-shaped section is alpha, wherein the value range of alpha is alpha > 100 degrees.

Further, the radius of the arc corresponding to the arc section is R, wherein the value range of R is R > 100mm.

Further, the electrochromic film comprises a first substrate layer, a first conductive layer, an electrochromic material layer, an electrolyte layer, an ion storage layer, a second conductive layer and a second substrate layer which are sequentially stacked; the electrochromic film also comprises a central part, wherein the central part is positioned in the edge part, and a blocking part is arranged at one side of the corner part facing the central part;

and the barrier part at least penetrates through the first conductive layer and/or the second conductive layer along the thickness direction of the electrochromic film.

Further, the straight edge portions are provided with straight edge electrodes at intervals, and the blocking portions extend toward at least one direction of the extending directions of the corner portions so as to surround the straight edge electrodes adjacent to the corner portions through the blocking portions.

Some embodiments of the present application also provide a color-changing device, including a substrate layer and the electrochromic film laminated with the substrate layer.

Some embodiments of the present application further provide an end product, including the electrochromic film or the color changing device, where the end product includes any one of a rearview mirror, a curtain wall, a sunroof, a side window of an automobile, a windshield of an automobile, a housing of an electronic product, glasses, a vehicle, and a display panel.

Embodiments of the present application have the following advantages: through setting up the insulating part at the corner of electrochromic diaphragm to form insulation structure between busbar and electrochromic diaphragm through high insulation structure, can make busbar and the conducting layer of corner place not direct contact through this insulation structure, when the busbar forms the electricity with external power source and is connected, can effectively prevent that external power source's electric current from directly conducting to the corner through the busbar, can effectively control the electric field intensity of corner, reduce the electric field intensity of corner in the charge-discharge in-process, reduced the damage that the electric field stack brought at the corner, promoted the life of electrochromic diaphragm.

In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 illustrates a schematic structural view of an electrochromic film according to one embodiment of the present application at a viewing angle;

FIG. 2 shows a cross-sectional view of section A-A of FIG. 1;

FIG. 3 is a schematic view of another embodiment of an electrochromic film according to some embodiments of the present application;

FIG. 4 shows a cross-sectional view of section B-B of FIG. 3;

FIG. 5 is a schematic view of another embodiment of an electrochromic film according to some embodiments of the present application;

FIG. 6 shows a cross-sectional view of the portion C-C of FIG. 5;

FIG. 7 shows a cross-sectional view of the portion D-D of FIG. 5;

FIG. 8 illustrates a schematic structural view of another embodiment of an electrochromic film according to some embodiments of the present application at a viewing angle;

fig. 9 illustrates a schematic structural diagram of an electrochromic film according to some embodiments of the present application.

Description of main reference numerals:

100-electrochromic film; 110-a central portion; 120-edge portion; 200-bus bars; 121-straight edge portion; 122-corner portion; 300-insulating part; 130-a first substrate layer; 140-a first conductive layer; 150-electrochromic layer; 160-a second conductive layer; 170-a second substrate layer; 400-first grooves; 500-a second groove; 210-a first bus bar; 220-a second bus bar; 161-a first straight electrode; 141-a second straight-sided electrode; 162-a first corner electrode; 142-a second corner electrode; 151-a layer of electrochromic material; 152-an electrolyte layer; 153-ion storage layer; 310-a first insulating layer; 320-a second insulating layer; 162 a-a first conductive segment; 600-corner groove; 700-barrier; 800-a first protective layer; 900-a second protective layer.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Unless defined otherwise, 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 description of the templates is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The present application is described in detail below with reference to fig. 1 to 9.

The embodiment of the application provides an electrochromic diaphragm, which can effectively control the field intensity of a corner area in the charge-discharge process, reduce the electric field intensity of the corner area in the charge-discharge process, reduce the damage to the electrochromic diaphragm caused by the superposition of electric fields in the corner area, reduce the possibility of failure in the corner area and prolong the service life of the electrochromic diaphragm. The electrochromic membrane provided by the application is mainly applied to large-area devices such as windows, e.g. building curtain walls, automobile backdrop, automobile side windows, aircraft portholes and the like, and plays roles in dimming and sun shading.

Referring to fig. 1, the electrochromic film 100 includes an edge portion 120, and the edge portion 120 is electrically connected with a bus bar 200, and the bus bar 200 may be made of a conductive material such as copper foil, silver wire, conductive resin, or the like. When the bus bar 200 is electrically connected to an external power source, the bus bar 200 conducts a current of the external power source to the conductive layer of the electrochromic film 100 to achieve the electrical connection of the electrochromic film 100 to the external power source.

In addition, the edge portion 120 includes a straight edge portion 121 and a corner portion 122, and the corner portion 122 is alternately connected with the straight edge portion 121 and surrounds the edge portion 120 to form a closed shape, and it is understood that the edge portion 120 has a ring-shaped structure. In some embodiments, the bus bar completely covers the edge portion 120; in other embodiments, the bus bar covers a portion of the edge portion.

Illustratively, when used in various windows, the electrochromic film 100 has a plurality of edges that meet to form a closed edge of the electrochromic film. The ends of the connection between the adjacent sides correspond to each other to form a corner 122 of the electrochromic film 100, and the corner 122 includes an apex and ends of the connection between the two sides. The end portions connected between two adjacent sides correspond to the corner regions of the electrochromic film 100, and the sides may be straight sides or irregular patterns with smaller bending degree and can be regarded as straight sides. Thus, the polygonal electrochromic films 100 all have a plurality of corner areas.

In this embodiment, in the electrochromic film 100 with a polygonal structure, the edge portion 120 includes a plurality of edges connected end to end in sequence, and the edges are connected end to end and enclose to form the edge portion 120. Wherein, in the edge portion 120 of the electrochromic film 100, an included angle formed by the connection between two adjacent edges forms a corner 122 of the edge portion 120, and a region in the electrochromic film corresponding to the included angle corresponds to a corner region of the electrochromic film; while the areas of the edge portion 120 between adjacent corner portions 122 correspond to the straight edge portions 121.

In a preferred scheme of the application, in the edge part of the electrochromic film, any point on the edge part corresponds to two points with a first preset distance, the vertical distance from the line segment formed by connecting the two points is a second preset distance, when the second preset distance is greater than n times of the first preset distance, the value range of n is 5-10%, and the edge part corresponding to the two points is a corner part; on the contrary, when the second preset distance is smaller than the first preset distance by n times, the value range of n is 5-10%, and the corresponding edge part between the two points is a straight edge part. The first preset distance is 5 cm to 20 cm; wherein the second predetermined distance is 5% to 10%, preferably 6% of the first predetermined distance. For example, the distance between the farthest point of the electrodes corresponding to two points with a first preset distance of 5 cm and the connecting line of the two points is less than 0.3 cm. For another example, two points corresponding to electrodes at a distance of 10 cm have a distance of less than 0.5 cm from the line connecting the two points. For another example, if the distance between the farthest point of the electrodes corresponding to two points 20 cm from the line connecting the two points is less than 1 cm, the corresponding part of the two points is considered to be a straight edge part. Specifically, the first preset distance is related to the electrochromic size, the material of the conductive layer and the length of the electrode of the electrochromic device, and can be correspondingly adjusted according to specific practical use conditions. It should be noted that when the maximum value of the distance between the connecting line from the corresponding edge portion to the two end points is greater than the second preset distance, the edge is considered to be a corner portion, and the corresponding electrode is a corner electrode. Alternatively, the two straight edge portions intersect to form the corner portion, and an angle between the two straight edge portions is less than 135 °. In the embodiment of the application, the corner part comprises the end parts of the two connected straight edge parts, the corner area is an area formed between the end parts of the two connected straight edge parts, and the included angle between the two straight edge parts is smaller than 135 degrees; the length of the end of the specific straight edge portion is set according to the size of the electrochromic device. Or the area between the edge parts corresponding to the maximum value of the distances between the connecting lines to the two end points and the second preset distance is the corner part. When the angle between the two connected straight edge portions is greater than 135 °, the two straight edge portions can also be considered to constitute a new straight edge portion.

Further, on the basis of the above embodiment, it is further improved that any point on the edge portion corresponding to the two points of the first preset distance divides the edge portion between the two points into a first segment and a second segment, a line passing through the point and tangent to the first segment is a first tangent line, a line passing through the point and tangent to the second segment is a second tangent line, and when an included angle between the first tangent line and the second tangent line is greater than or equal to 135 °, the edge portion corresponding to the two points is a straight edge portion. Further, the corner portion includes an apex and two ends connected to each other; and the edge part between the two points of the first preset distance is divided into a first section and a second section corresponding to any point on the edge part, a line passing through the point and tangent to the first section is a first tangent line, a line passing through the point and tangent to the second section is a second tangent line, and when the included angle between the first tangent line and the second tangent line is smaller than 135 degrees, the point is the vertex of the corner part.

Further, as shown in fig. 7, an insulating part 300 is provided between the conductive layer of the corner 122 and the bus bar 200, so as to form an insulating structure between the conductive layer of the corner 122 and the bus bar 200, thus preventing the conductive layer of the corner from directly contacting the bus bar, forming an insulating barrier between the corner 122 and the conductive layer of the bus bar 200 by the insulating structure, reducing the strength of the superimposed electric field of the corner, avoiding premature failure of the corner due to over-charge and over-discharge, and improving the stability and service life of the corner.

On the one hand, the insulating part can be arranged between the conductive layer and the bus bar to completely block the current from being conducted, and compared with a method of etching the corner part into a blocking part, the insulating part can completely not contact with the bus bar to completely insulate, so that the etching distance is prevented from being too small to be effectively isolated. On the other hand, the conductive layer is not etched, that is, the conductive layer at the edge part and the conductive layer at the central part are connected, so that the situation that the edge of the electrochromic film is stressed to generate warping during lamination is avoided. In addition, by providing the insulating part 300 between the conductive layer and the bus bar 200, not only an effective insulating structure can be formed between the conductive layer and the bus bar, but also the difficulty of the manufacturing process of the electrochromic film can be reduced, thereby reducing the production cost and improving the production efficiency.

The insulating structure described herein means that the conductive layer at the corner portion and the bus bar form a barrier by the barrier portion, and the conductive layer at the corner portion and the bus bar can be prevented from being in direct contact by the barrier portion, that is, when the bus bar is electrically connected to the conductive layer at the straight edge portion, the current conducted by the bus bar can be conducted from the conductive layer at the straight edge portion to the conductive layer at the corner portion.

Specifically, when the bus bar 200 is electrically connected to the external power source, the current of the external power source can be effectively prevented from being directly transferred to the conductive layer of the corner 122 through the bus bar 200, and the electric field intensity of the corner 122 in the charge and discharge process can be effectively controlled, so that the electric field intensity of the corner 122 in the charge and discharge process is reduced, and the loss of the corner 122 due to the electric field superposition is reduced.

As shown in fig. 7, in some embodiments of the present application, the straight edge portions are provided with straight edge electrodes at intervals, and it should be noted that, in the edge portion of the electrochromic film, the straight edge electrode refers to a first conductive layer 140 portion or a second conductive layer 160 portion exposed in the straight edge portion of the edge portion, and the exposed first conductive layer 140 portion or the exposed second conductive layer 160 portion is used for electrically connecting with the bus bar.

The straight-edge electrode described herein includes a first straight-edge electrode 161 and a second straight-edge electrode 141, the first straight-edge electrode 161 and the second straight-edge electrode 141 are staggered, the first straight-edge electrode 161 is used for being connected with a negative electrode of an external power supply, and the second straight-edge electrode 141 is used for being connected with a positive electrode of the external power supply.

Further improvements to any of the embodiments described above are that the polarity of the straight edge electrodes adjacent to the corners is the same, that is, in some embodiments, the straight edge electrodes adjacent to the corners are both first straight edge electrodes 161 or the straight edge electrodes adjacent to the corners are both second straight edge electrodes 141.

In the present embodiment, the bus bar 200 includes a first bus bar 210 and a second bus bar 220, the first bus bar 210 and the second bus bar 220 are disposed at both sides of the electrochromic film 100 in the thickness direction, respectively, and the first bus bar 210 and the second bus bar 220 are disposed at the edge portion of the electrochromic film.

Wherein the first bus bar 210 is electrically connected to the first straight electrode 161, and the second bus bar 220 is electrically connected to the second straight electrode 141.

Referring to fig. 7, in the present embodiment, the electrochromic film 100 includes a first substrate layer 130, a first conductive layer 140, an electrochromic material layer 151, an electrolyte layer 152, an ion storage layer 153, a second conductive layer 160, and a second substrate layer 170, which are sequentially stacked.

The electrochromic layer 150 includes the electrochromic material layer 151, the electrolyte layer 152, and the ion storage layer 153.

Wherein, the first substrate layer 130 and the second substrate layer 170 are made of transparent and flexible materials, such as PET (Polyethylene terephthalate ), PC, etc.; the first conductive layer 140 and the second conductive layer 160 are transparent conductive oxides, such as ITO (Indium Tin Oxide), IZO, etc., and the present embodiment attaches ITO to the first substrate layer 130 and the second substrate layer 170 by means of magnetron sputtering.

Further, the straight edge portion is provided with a plurality of straight edge grooves at intervals, the straight edge grooves include a first groove 400 adjacent to the corner portion, and the first groove 400 penetrates through the first substrate layer 130, the first conductive layer 140, the electrochromic material layer, the electrolyte layer and the ion storage layer along the thickness direction of the electrochromic film to expose a portion of the second conductive layer 160. Of course, in this embodiment, the first grooves 400 are disposed in a plurality of numbers and are disposed at intervals on the straight edge portion, and the first grooves 400 penetrate the first substrate layer 130, the first conductive layer 140, the electrochromic material layer, the electrolyte layer and the ion storage layer, and a portion of the second conductive layer 160 exposed from the first grooves 400 is the first straight edge electrode 161.

In this embodiment, the conductive layer electrically connected to the ion storage layer is a negative conductive layer of the electrochromic device, and the conductive layer electrically connected to the electrochromic material is a positive conductive layer of the electrochromic device. The first straight electrode 161 adjacent to both ends of the corner portion is used for connection with the negative electrode of the external power source, that is, when the first bus bar 210 electrically connected to the first straight electrode 161 is connected with the negative electrode of the external power source, the first straight electrode 161 is electrically connected with the negative electrode of the external power source through the first bus bar 210. It will be appreciated that when the first bus bar 210 is electrically connected to an external power source, current from the external power source can be conducted through the first bus bar 210 to the second conductive layer 160, thereby forming the second conductive layer 160 to be electrically connected to the external power source. The inventors have found that when electrodes on both sides of the corner are electrically connected to the ion storage layer, corner failure can be effectively alleviated, and more effectively alleviated than when electrically connected to the electrochromic layer 150.

Since the ion storage layer is connected with the second conductive layer 160, when the first straight electrode 161 is electrically connected with the negative electrode of the external power source, that is, the second conductive layer 160 is electrically connected with the negative electrode of the external power source, the strength of the superimposed electric field at the corner portion can be reduced, and thus the service life of the corner portion can be effectively improved.

In addition, the straight-sided groove further includes a second groove 500, wherein the second groove 500 penetrates the second base layer 170, the second conductive layer 160, and the electrochromic layer 150 in the thickness direction of the electrochromic film 100 to expose a portion of the first conductive layer 140, forming the second straight-sided electrode 141, and the second straight-sided electrode 141 is electrically connected with the second bus bar 220.

It is understood that when the second bus bar 220 is electrically connected to an external power source, a current of the external power source can be conducted to the first conductive layer 140 through the second bus bar 220, thereby electrically connecting the first conductive layer 140 to the external power source.

In other embodiments of the present application, both ends of the corner portion are adjacent to the second groove 500, that is, both ends of the corner portion are respectively adjacent to the second straight-sided electrode 141. When the second bus bar 220 is electrically connected to the positive electrode of the external power source, the second straight-sided electrodes 141 at both ends of the corner portion are electrically connected to the positive electrode of the external power source.

By simultaneously switching on the first conductive layer 140 and the second conductive layer 160, a voltage difference can be formed between the first conductive layer 140 and the second conductive layer 160, so that the electrochromic layer 150 changes color stably and reversibly under the action of the voltage.

The number of the first grooves 400 and the number of the second grooves 500 may be one, two or more than two, and may be specifically set according to practical situations.

It can be understood that the two ends of the corner portion 122 are respectively adjacent to the first recess 400, that is, the two ends of the corner portion 122 are respectively adjacent to the first straight electrode 161; or the two ends of the corner 122 are respectively adjacent to the second groove 500, i.e. the two ends of the corner 122 are respectively adjacent to the second straight-edge electrode 141.

Since the first straight-side electrode 161 is connected to the first bus bar 210 and the second straight-side electrode 141 is connected to the second bus bar 220, when the first bus bar 210 is connected to the negative electrode of the external power source, the first straight-side electrode 161 is connected to the negative electrode, and when the second bus bar 220 is connected to the positive electrode of the external power source, the second straight-side electrode 141 is connected to the positive electrode.

The electrochromic material layer 151 is connected to the first conductive layer 140, and the ion storage layer 153 is connected to the second conductive layer 160.

Preferably, in the present embodiment, when both ends of each corner 122 of the electrochromic film 100 are adjacent to the first groove 400, and the first straight-sided electrode 161 is electrically connected to the negative electrode of the external power source through the first bus bar 210, and the second straight-sided electrode 141 is electrically connected to the positive electrode of the external power source through the second bus bar 220, the loss generated to the corner 122 by the superimposed electric field is minimized. Since the second conductive layer 160 is connected with the ion storage layer 153, when an external power source is electrically connected with the first straight electrode 161 through the first bus bar 210, the ion storage layer 153 is correspondingly connected with the negative electrode, so that ions in the ion storage layer 153 are slow in the conduction process, and the intensity of the superimposed electric field generated at the corner 122 is minimum in the conduction process, thereby effectively improving the stability and the service life of the corner 122.

The first insulating layer 310 and the second insulating layer 320 are respectively insulating high-temperature glue, so that the first insulating layer 310 can form an insulating structure between the first bus bar 210 and the first corner electrode 162 through the first insulating layer 310 arranged between the first corner electrode 162 and the first bus bar 210, so that the first corner electrode 162 is prevented from directly contacting an external power source through the first bus bar 210, and thus, the current of the external power source is prevented from being directly conducted to the first corner electrode 162 through the first bus bar 210, thereby reducing the electric field intensity of the corner 122, and the first bus bar 210 can be adhered to the first corner electrode 162 through the first insulating layer 310, so that the stability of the connection of the first bus bar 210 and the edge portion 120 of the electrochromic film 100 is improved.

Meanwhile, by disposing the second insulating layer 320 between the second corner electrode 142 and the second bus bar 220, the second insulating layer 320 not only can form an insulating structure between the second bus bar 220 and the second corner electrode 142, preventing the second corner electrode 142 from directly making direct contact with an external power source through the second bus bar 220, preventing the current of the external power source from being directly conducted to the second corner electrode 142 through the second bus bar 220, thereby reducing the electric field intensity during the charge and discharge of the corner 122, but also can bond between the second bus bar 220 and the second corner electrode 142, improving the stability of the connection of the second bus bar 220 and the edge portion 120 of the electrochromic film 100.

As shown in fig. 3 and 8, in the present embodiment, the length of the insulating portion is longer than the length of the straight-side electrode.

It will be appreciated that the length of the corner is greater than the length of the straight edge electrode, i.e. the length of the corner electrode is greater than the length of the straight edge electrode. The length of the insulating part affects the conduction speed of current from the bus bar to the central part of the conductive layer, and thus affects the color change speed of the electrochromic film. Therefore, the length of the insulating part is longer than that of the straight-edge electrode, so that the electrochromic diaphragm is prevented from being invalid effectively, the electrochromic diaphragm is improved, the electrochromic diaphragm is guaranteed to have a region with enough current conduction after being electrified, the electrochromic diaphragm can be quickly changed, and particularly, when the electrochromic diaphragm is used for a large-area device, the electrochromic speed of the electrochromic diaphragm directly influences visual perception of a user, so that the user experience is guaranteed.

The length of the insulating portion refers to the length of the insulating portion along the corner path of the electrochromic film.

As shown in fig. 7, in some embodiments of the present application, the corner is provided with a corner groove 600.

The corner groove 600 penetrates the first substrate layer 130, the first conductive layer 140, the electrochromic material layer, the electrolyte layer and the ion storage layer to expose a portion of the second conductive layer 160 to form a first corner electrode 162 at the corner 122, and it can be understood that the opening direction of the corner groove is the same as the opening direction of the first groove 400.

In addition, both ends of the corner groove protrude toward the direction in which the corner portion extends.

In this embodiment, the length of the straight-edge electrode is defined as x, the distance between two adjacent straight-edge electrodes is defined as y, and the length of one straight edge in the edge portion is defined as z, where x, y, z satisfies the relationship: z=n× (x+y), where n is a positive integer.

Further, n is an odd number greater than 1.

For example, when n has a value of 3, since the straight-sided electrodes include the first straight-sided electrode 161 and the second straight-sided electrode 141, the first straight-sided electrode 161 is connected to the negative electrode of the external power source through the bus bar, and the second straight-sided electrode 141 is connected to the positive electrode of the external power source through the bus bar, and the first straight-sided electrode 161 and the second straight-sided electrode 141 are alternately arranged at the straight-sided portion, at this time, the first straight-sided electrode 161 is two, and the second straight-sided electrode 141 is one, that is, the second straight-sided electrode 141 is located between the two first straight-sided electrodes 161 such that the corner portion is adjacent to the first straight-sided electrode 161.

When n has a value of 5, there are three first straight-edge electrodes 161, two second straight-edge electrodes 141, and two ends of the straight-edge portion are respectively the first straight-edge electrodes 161, and it is understood that the first straight-edge electrodes 161 and the second straight-edge electrodes 141 are arranged in the straight-edge portion as the first straight-edge electrodes 161, the second straight-edge electrodes 141, and the first straight-edge electrodes 161.

When n is greater than 5, the first straight-side electrode 161 and the second straight-side electrode 141 are arranged as the first straight-side electrode 161, the second straight-side electrode 141 … …, the second straight-side electrode 141, and the first straight-side electrode 161 at the straight-side portion.

Therefore, the straight-edge electrodes adjacent to the two ends of the corner are the first straight-edge electrodes 161, and the first straight-edge electrodes 161 are connected with the negative electrode of an external power supply through the bus bars, so that the two ends of the corner are respectively connected with the negative electrode, the original production drawing of the electrochromic diaphragm can be reserved, the production process is simplified, the production cost is reduced, the production line efficiency and the production quality of the electrochromic diaphragm are improved, and the service life of the electrochromic diaphragm is prolonged.

It is understood that the length of the corner groove is greater than the length of the insulating portion; as shown in fig. 8, in the present embodiment, the insulating portion is a first insulating layer 310, the first insulating layer 310 covers a portion of the first corner electrode 162 located at the corner to expose two first conductive segments 162a of the first corner electrode 162, that is, two first conductive segments 162a are located at two ends of the first corner electrode 162, the first bus bar 210 is electrically connected to the first conductive segments 162a, when the first bus bar 210 is electrically connected to an external power source, an external current can be conducted to the first conductive segments 162a through the first bus bar 210, and the current can be conducted to the corner of the first corner electrode 162 through the first conductive segments 162a, so that the external current can be prevented from being directly conducted to the corner of the first corner electrode 162 through the first bus bar 210, thereby effectively reducing the strength of a superimposed electric field generated at the corner of the first corner electrode 162, reducing the damage to the corner 122 caused by the superimposed electric field, and improving the service life of the corner 122. Preferably, the first bus bar 210 is connected to the negative electrode of the external power source, so that the first conductive segment 162a can be connected to the negative electrode of the external power source through the first bus bar 210, thereby further reducing the strength of the superimposed electric field at the corner 122, further reducing the damage of the superimposed electric field to the corner 122, and improving the durability and the service life of the electrochromic film 100.

Or in other embodiments, the corner groove extends through the second substrate layer 170, the second conductive layer 160, the ion storage layer, the electrolyte layer, and the electrochromic material layer to expose a portion of the first conductive layer 140, forming the second corner electrode 142, and the insulating part completely covers the corner groove, i.e., the insulating part completely covers the second corner electrode 142. In the present embodiment, the insulating part is the second insulating layer 320, so that the second insulating layer 320 not only can form an insulating structure between the second bus bar 220 and the second corner electrode 142 to prevent the second corner electrode 142 from being directly electrically connected with the external power source through the second bus bar 220, thereby preventing the current of the external power source from being directly conducted to the second corner electrode 142 through the second bus bar 220, thereby reducing the strength of the superimposed electric field of the corner part 122, but also can bond between the second bus bar 220 and the second corner electrode 142 to improve the stability of the connection of the second bus bar 220 with the edge part 120 of the electrochromic film 100.

As shown in fig. 4 and 6, in some embodiments of the present application, the insulating part 300 includes the first substrate layer 130 and/or the second substrate layer 170 of the corner part 122 to form an insulating structure at the corner part 122 of the electrochromic film 100 by the first substrate layer 130 and the second substrate layer 170, i.e., no groove is provided at the corner part 122.

It is understood that the first bus bar 210 is connected with the first base layer 130 at the corner 122 to form an insulating barrier between the first bus bar 210 and the conductive layers (referred to as the first conductive layer 140 and the second conductive layer 160) through the first base layer 130 to prevent the first bus bar 210 from being directly electrically connected with the corner 122, thereby being capable of blocking external current from being directly conducted to the corner 122 through the first bus bar 210. The second bus bar 220 is connected with the second substrate layer 170 at the corner 122, so that an insulating barrier is formed between the second bus bar 220 and the conductive layer (referred to as the first conductive layer 140 and the second conductive layer 160) through the second substrate layer 170, so that the second bus bar 220 is prevented from being directly electrically connected with the corner 122, and external current can be prevented from being directly conducted to the corner 122 through the second bus bar 220, and the current and the superimposed electric field of the corner 122 can be effectively reduced, so that the loss of the electric field to the corner 122 is reduced, and the service life of the electrochromic film 100 is prolonged.

Since the first bus bar 210 and the second bus bar 220 are of a linear structure, when the two first bus bars 210 are connected at the corner portion 122 of the electrochromic film 100, the two first bus bars 210 need to be overlapped, which results in an increase in thickness of the overlapped position of the two first bus bars 210, so that the electrochromic film 100 has a height difference between the straight edge portion 121 and the corner portion 122, and when the electrochromic film 100 is assembled into glass, stress is generated due to the height difference, thereby causing glass breakage.

Based on this, in this embodiment, as shown in fig. 9, the connection portions of the first bus bar 210 and the second bus bar 220 and the corner portion 122 are arc-shaped sections, so that the first bus bar 210 can form a coherent structure at the corner portion 122, that is, the first bus bar 210 is an integral structure, so that the bus bars corresponding to the two straight edge portions do not need to form a lap joint structure at the corner portion 122, the height difference between the position of the whole electrochromic film corresponding to the corner portion 122 and the position corresponding to the straight edge portion 121 is reduced, the thickness of the straight edge portion 121 in the edge portion 120 of the electrochromic film 100 is ensured to be equal to the thickness of the corner portion 122, the situation of glass breakage is prevented when the electrochromic film 100 and glass are combined, and the production quality is ensured.

The central angle corresponding to the arc segment is alpha, wherein the value range of alpha is alpha > 100 degrees, the value of alpha can be specifically set according to actual conditions, and in the embodiment, the value of alpha is not specifically limited. It should be noted that, by increasing the value of α, the radian of the arc segment is increased.

In addition, the radius of the arc corresponding to the arc section is R, wherein the value range of R is R > 100mm. It can be understood that when the value of the central angle α corresponding to the arc segment is determined, the larger the radius of the arc, the larger the arc length of the arc segment. The busbar in this application embodiment adopts the coil stock, adopts to paste to establish the mechanism and pastes around the arc and establish the curved busbar of formation, need not overlap joint busbar, and its thickness is even, and the busbar thickness that corresponds with straight flange portion is unanimous, can not lead to local regional thickness thicker and influence and close piece quality.

In a preferred embodiment, the angle α is preferably in the range α >135 °. In general, the glass outside the electrochromic film is provided with an ink area for shielding the edge part of the electrochromic film, for the sake of attractive appearance, the outer edge of the ink area corresponding to the corner part of the electrochromic film is usually set to be an included angle of 135 degrees, and the bus bar of the electrochromic film is larger than 135 degrees and is larger in opening, so that the electrochromic film can be better shielded by the ink area.

As shown in fig. 1, 3 and 5, in some embodiments of the present application, the electrochromic film further includes a center portion that is located within the edge portion, i.e., edge portion 120 is adjacent to the center portion 110, and edge portion 120 is connected to the center portion 110 and extends outward of the electrochromic film 100.

In the embodiment of the present application, the central portion 110 is a visible portion of the electrochromic film 100, and the edge portion 120 is a non-visible portion of the electrochromic film 100. By adjusting the transmittance of the visual field to adjust the transmittance of the electrochromic film or the amount of light passing through the electrochromic film 100, a user can observe the scene on the other side of the electrochromic film through the visual field. Additionally, in other embodiments of the present application, the center portion 110 is a color-changing region in the electrochromic film 100 and the edge portion 120 is a non-color-changing region of the electrochromic film 100.

The corner portion 122 is provided with a blocking portion 700 on a side facing the central portion 110 and the straight edge portion 121, and the blocking portion 700 penetrates through at least the first conductive layer 140 and/or the second conductive layer 160 along the thickness direction of the electrochromic film 100, so that the conductive layer (the first conductive layer 140 and/or the second conductive layer 160) of the corner portion 122 is disconnected from the central portion 110 by the blocking portion 700, and thus, during charging and discharging of the electrochromic film 100, the current of the central portion 110 and the current of the edge portion 120 cannot be conducted to the corner portion 122, so that the current of the corner portion 122 is reduced, the superimposed electric field strength of the corner portion 122 is reduced, and long-term over-charge and over-discharge of the corner region is avoided, and early failure is avoided.

Note that the barrier 700 includes an etched region formed by etching a portion of the conductive layer and/or a filler having a resistance greater than that of the bus bar 200. In this embodiment, the blocking portion 700 may be a portion of the first conductive layer 140 and/or the second conductive layer 160 etched by laser, a portion of the width of the entire conductive layer, or a combination of both. The etched region may be a linear structure etched into a line, or may be a planar structure in which a partial region is etched.

The blocking portion 700 is a linear structure, and the linear structure includes at least one of a straight line, a broken line, a curved line, and an arc line.

As shown in fig. 3, in the present embodiment, the straight edge portions are provided with straight edge electrodes at intervals, the blocking portions extend in at least one direction of the extending directions of the corner portions, and the straight edge electrodes adjacent to the corner portions can be surrounded by the blocking portions. It can be appreciated that, in the projection of the electrochromic film 100 in the thickness direction, the blocking portion 700 has a gap with the first landing electrode 162, so that the first landing electrode 162 is blocked from the central portion 110 by the blocking portion 700 to prevent the current of the central portion 110 from being conducted to the first landing electrode 162; in addition, in some embodiments, the blocking portion 700 has a gap with the second corner electrode 142, so that the second corner electrode 142 is blocked from the central portion 110 by the blocking portion 700, so as to prevent the current of the central portion 110 from being conducted to the second corner electrode 142, thereby reducing the current of the corner 122 and the strength of the superimposed electric field, and reducing the damage caused to the corner 122 during the charging and discharging process of the electrochromic film 100, so as to improve the service life of the corner electrode.

Further, the barrier 700 forms a barrier region with the outer edge of the electrochromic film 100, which completely covers the first corner electrode 162 or the second corner electrode 142 along the projection of the electrochromic film 100 in the thickness direction. By arranging the blocking portion 700 at the corner portion 122, an electric field is not formed at one side of the blocking portion 700 at the corresponding first corner electrode 162 and/or second corner electrode 142, so as to reduce the electric field intensity of the corner portion 122, thereby ensuring that the electrochromic speed can not affect the experience of the user while ensuring that the electrochromic film is effectively prevented from corner failure.

It can be understood that the blocking part covers the whole length direction of the corner electrode, and the current conducted by the bus bar can only be conducted from the two end parts of the corner electrode and can not be conducted to the central part of the electrochromic film from the side edge, so that the current conducted by the corner electrode is effectively blocked, and further the early failure of the electrochromic film is effectively prevented.

As shown in fig. 2 and 4, in some embodiments of the present application, a protective layer is provided on one side of the bus bar, and is at least partially connected to the first substrate layer 130 or the second substrate layer 170, and the protective layer completely covers the bus bar.

The protective layer comprises a first protective layer and a second protective layer.

Specifically, a first protection layer 800 is disposed on a side of the first bus bar 210 facing away from the second bus bar 220, and the first protection layer 800 is completely covered on the first bus bar 210 to form an insulating protection layer on the surface of the first bus bar 210, so as to avoid a short circuit condition caused by connection between the first bus bar 210 and other conductive materials, and avoid a short circuit condition caused by contact between the first bus bar 210 and the second bus bar 220. In addition, the first protective layer 800 is at least partially connected to the first base layer 130, so that the first bus bar 210 is adhered to the first base layer 130 through the first protective layer 800, thereby improving the stability of the connection between the first bus bar 210 and the first base layer 130.

In addition, as shown in fig. 2, a second protection layer 900 is disposed on a side of the second bus bar 220 facing away from the first bus bar 210, and an insulating protection layer is formed on the surface of the first bus bar 210 by completely covering the second protection layer 900 on the second bus bar 220, so as to avoid a short circuit between the first bus bar 210 and other conductive materials. In addition, the second protective layer 900 is at least partially connected to the second base layer 170 to bond the second bus bar 220 to the second base layer 170 through the second protective layer 900, so as to improve the stability of the connection between the second bus bar 220 and the second base layer 170.

In this embodiment, the first protective layer 800 and the second protective layer 900 are both disposed on the edge portion 120 of the electrochromic film 100, and the first protective layer 800 and the second protective layer 900 are both high-temperature adhesives.

Some embodiments of the present application also provide a color shifting device comprising a substrate layer and an electrochromic film 100 as described in any of the embodiments above laminated to the substrate layer.

Specifically, the substrate layer is a transparent structure, for example, the substrate layer may be transparent glass, a transparent acrylic plate, a transparent PVC plate, or the like. Preferably, the substrate layer is glass, the substrate layer is provided with two layers, and the electrochromic film 100 is further sandwiched between the two substrate layers, an adhesive such as PVB or OCA is arranged before the electrochromic film 100 and the substrate layers, and the peripheral edge of the electrochromic film 100 is sealed by the sealant, and meanwhile, the two substrate layers are connected by the sealant, so that a sealed color changing device is formed. The sealant is a transparent insulating colloid, and can be PVB (Polyvinyl Butyral, polyvinyl alcohol Ding Quanzhi) or OCA (Optically Clear Adhesive, optical cement) for example.

In addition, the sealant can form adhesion between two substrate layers and the electrochromic membrane 100, can also play a sealing role in isolating oxygen and air for the electrochromic membrane 100, and can prevent the electrochromic membrane 100 from contacting with external moisture and oxygen so as to prolong the service life of the electrochromic membrane 100 and improve the service life of the color changing device.

In addition, the edge portion 120 of the electrochromic film 100 corresponding to the inner surface of the substrate layer is provided with a shielding layer, so that in order to prevent a user from directly seeing the edge portion 120 of the electrochromic film 100 through the transparent substrate layer, the edge of the substrate layer is provided with the shielding layer, and the bus bar 200 and the insulating part 300 at the edge of the electrochromic film 100 are shielded by the shielding layer, thereby improving the aesthetic property of the color changing device. Preferably, the masking layer is provided as an ink layer.

Specifically, in some embodiments of the present application, when the insulating part 300 is disposed at a side of the bus bar 200 away from the edge of the electrochromic film 100, and the projection of the insulating part 300 on the plane of the shielding layer is located in the shielding layer.

It should be noted that, the shielding layer can completely cover the insulating portion 300, so that the normal visual effect of the color changing device is not affected when the user observes, and the aesthetic property of the color changing device can be ensured.

Preferably, a further aspect of embodiments of the present application further provides an end product comprising an electrochromic film 100 as described in any of the embodiments above or a color changing device as described above, wherein the end product comprises any of a rear view mirror, a curtain wall, a sunroof, a side window of an automobile, a windshield of an automobile, a housing of an electronic product, glasses, a vehicle, and a display panel. In this embodiment, the electrochromic film 100 or the color-changing device is used, and thus all the advantages of the electrochromic film 100 and the color-changing device are obtained. With reduced risk of corner failure and prolonged product life.

Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application.

Claims

1. An electrochromic film comprising an edge portion, the edge portion being electrically connected to a bus bar;

2. The electrochromic film according to claim 1, wherein the straight edge portions are provided with straight edge electrodes at intervals, and polarities of the straight edge electrodes adjacent to the corner portions are the same.

3. The electrochromic film of claim 2, wherein the electrochromic film comprises a first substrate layer, a first conductive layer, an electrochromic material layer, an electrolyte layer and an ion storage layer, a second conductive layer and a second substrate layer, which are laminated in this order;

4. The electrochromic film of claim 3 wherein the length of the insulating portion is greater than the length of the straight-sided electrode.

5. The electrochromic film of claim 1, wherein the electrochromic film comprises a first substrate layer, a first conductive layer, an electrochromic material layer, an electrolyte layer and an ion storage layer, a second conductive layer and a second substrate layer, which are laminated in this order;

the corner part is provided with a corner groove;

6. The electrochromic film of claim 1, wherein the electrochromic film comprises a first substrate layer, a first conductive layer, an electrochromic material layer, an electrolyte layer and an ion storage layer, a second conductive layer and a second substrate layer, which are laminated in this order;

7. The electrochromic film of claim 6, wherein the portion of the bus bar connected to the corner is an arcuate segment;

8. The electrochromic film according to any one of claims 1 to 7, comprising a first substrate layer, a first conductive layer, an electrochromic material layer, an electrolyte layer and an ion storage layer, a second conductive layer and a second substrate layer, which are laminated in this order; the electrochromic film also comprises a central part, wherein the central part is positioned in the edge part, and a blocking part is arranged at one side of the corner part facing the central part;

9. The electrochromic film of claim 8, wherein the straight-sided portions are provided with straight-sided electrodes at intervals, and the barrier portion extends toward at least one of the corner portion extending directions to enclose the straight-sided electrode adjacent to the corner portion by the barrier portion.

10. A color-changing device comprising a substrate layer and the electrochromic film according to any one of claims 1 to 9 laminated to the substrate layer.

11. An end product comprising an electrochromic film according to any one of claims 1 to 9 or a color changing device according to claim 10, wherein the end product comprises any one of a rear view mirror, a curtain wall, a sunroof, a side window of an automobile, a windshield of an automobile, a housing of an electronic product, eyeglasses, a vehicle and a display panel.