Electrochromic membrane, electrochromic device and electrochromic system

Abstract

The utility model provides an electrochromic diaphragm, an electrochromic device and an electrochromic system, and relates to the technical field of electrochromic devices. The electrochromic membrane comprises a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer and a second substrate layer which are sequentially stacked, and further comprises a detection groove group, the detection groove group comprises a first detection groove and a second detection groove, the first detection groove penetrates from the first substrate layer to the surface of the second conductive layer, the second detection groove penetrates from the second substrate layer to the surface of the first conductive layer, and the groove bottom of the first detection groove and the groove bottom of the second detection groove are electrically connected with two electrodes of a detection device respectively. According to the electrochromic membrane, the first conductive layer and the second conductive layer at a certain point of the electrochromic membrane can be connected with two electrodes of a detection device such as a voltmeter through the detection groove group, so that voltage detection at a specified position of the electrochromic membrane is realized, and the voltage detection accuracy is improved.

Description

Technical Field

[0001] This application relates to the field of electrochromic technology, and in particular to an electrochromic film, an electrochromic device, and an electrochromic system. Background Technology

[0002] Electrochromic technology is a phenomenon in which the optical properties (reflectivity, transmittance, absorptivity, etc.) of a material undergo stable and reversible color changes under the influence of an external electric field, which manifests as reversible changes in color and transparency in appearance.

[0003] like Figure 1 As shown, an electrochromic film generally comprises a first substrate layer 1, a first conductive layer 2, an electrochromic layer 3, a second conductive layer 4, and a second substrate layer 5, stacked sequentially. Both the first substrate layer 1 and the second substrate layer 5 are "transparent substrates," and both the first conductive layer 2 and the second conductive layer 4 are "transparent conductive layers." The electrochromic layer 3 comprises an electrochromic material layer 31, an electrolyte layer 32, and an ion storage layer 33, stacked sequentially. The ion storage material in the ion storage layer 33 stores ions; when an electric current is applied, ions from the ion storage material transfer to the electrochromic material layer 31, which absorbs these ions and changes color. The electrolyte layer 32, also called the ion transfer layer, serves as the ion transfer channel.

[0004] The first conductive layer 2 is electrically contacted with an external terminal via a first busbar 20 thereon, and the second conductive layer 4 is electrically contacted with another external terminal via a second busbar 40 thereon. Thus, by connecting a power source to the two external terminals, a voltage can be applied between the first conductive layer 2 and the second conductive layer 4, thereby altering the transmittance of the electrochromic film. The voltage causes ions to move between the electrochromic material layer 31 and the ion storage layer 33, and to intercalate / extract or deintercalate / intercalate between them, thereby changing the optical state of the electrochromic material in the electrochromic material layer 31, and consequently altering the transmittance of the electrochromic device, adjusting it between a colored state, an intermediate state, and a transparent state.

[0005] Generally, the color changing speed of the electrochromic film can be increased by increasing the voltage applied to the electrochromic film, but the voltage is too large to damage the electrochromic film. In order to avoid the voltage of the film exceeding the safe working range, the voltage of the film is usually detected. One existing electrochromic film voltage detection method is to directly read the voltage of the entire electrochromic film through the battery circulation system, but this detection method does not consider the voltage division of the wire (such as the connecting wire between the power supply and the film bus bar), and cannot directly obtain the voltage division data of the film. During the charging and discharging process, the system can only display the value of the applied voltage (i.e. the applied voltage), and cannot accurately reflect the actual voltage on the film. Although a non-contact probe of a potential probe microscope can be used to measure the potential distribution on the surface of the electrochromic film in the laboratory, thereby realizing high spatial resolution voltage measurement, this method has problems such as expensive equipment, high environmental requirements, and complex operation, which is difficult to apply on a large scale.

[0006] In order to improve the above problems, the existing commonly used electrochromic film voltage detection method is to infer the voltage division at the film by calculation. Although this method takes into account the voltage division of the wire, the calculated voltage value is the voltage value of the entire film, and the voltage value at a certain point on the film cannot be known, which leads to deviation in the dimming control of the electrochromic film. Practical new type content

[0007] The purpose of the present application is to provide an electrochromic film, an electrochromic device and an electrochromic system to alleviate the technical problem that the calculated voltage value is the voltage value of the entire film, not the voltage value at a certain point on the film, leading to deviation in the detection result when the voltage at the electrochromic film is inferred by calculation in the prior art.

[0008] In a first aspect, the present application provides an electrochromic film, comprising a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer and a second substrate layer which are sequentially stacked, and further comprising a detection slot group.

[0009] The detection slot group comprises a first detection slot and a second detection slot, the first detection slot penetrates from the first substrate layer to the surface of the second conductive layer, and the second detection slot penetrates from the second substrate layer to the surface of the first conductive layer, and the slot bottom of the first detection slot and the slot bottom of the second detection slot are respectively used for electrical connection with two electrodes of a detection device.

[0010] In an optional embodiment, the electrochromic film comprises a bus bar at its edge, and the first detection slot and the second detection slot in the detection slot group are spaced apart along the extension direction of the electrode area.

[0011] In an optional embodiment, the interval between the first detection groove and the second detection groove in the detection groove group is 1-10 mm along the extension direction of the bus bar.

[0012] In an optional embodiment, the electrochromic film further comprises a first conductive member and a second conductive member, one end of the first conductive member is electrically connected to the bottom of the first detection groove, and the other end is used for connecting the negative electrode of the detection device, one end of the second conductive member is electrically connected to the bottom of the second detection groove, and the other end is used for connecting the positive electrode of the detection device. Wherein, the bottom of the first detection groove is connected to the negative electrode of the detection device through the first conductive member, and the bottom of the second detection groove is connected to the positive electrode of the detection device through the second conductive member.

[0013] In an optional embodiment, the bus bar comprises a first bus bar and a second bus bar, the first bus bar is electrically connected to the first conductive layer, the second bus bar is electrically connected to the second conductive layer, and the orthogonal projection of the first bus bar on the second conductive layer is parallel to the orthogonal projection of the second bus bar on the second conductive layer.

[0014] The first bus bar and the second bus bar are respectively arranged on the two sides of the electrochromic film, and the detection groove group is arranged close to the first bus bar or the second bus bar.

[0015] In an optional embodiment, the vertical distance between the orthogonal projection of the detection groove group on the first conductive layer and the orthogonal projection of the first bus bar on the first conductive layer is 10-15 mm; or the vertical distance between the orthogonal projection of the detection groove group on the second conductive layer and the orthogonal projection of the second bus bar on the second conductive layer is 10-15 mm.

[0016] In an optional embodiment, one end of the first bus bar is used for leading out, the distance between the detection groove group and one end of the first bus bar is smaller than the distance between the detection groove group and the other end of the first bus bar; or one end of the second bus bar is used for leading out, the distance between the detection groove group and one end of the second bus bar is smaller than the distance between the detection groove group and the other end of the second bus bar.

[0017] In an optional embodiment, the bus bar comprises a plurality of third bus bars and a plurality of fourth bus bars, the electrochromic film is provided with a plurality of first electrode grooves penetrating from the first base layer to the second conductive layer, and a plurality of second electrode grooves penetrating from the second base layer to the first conductive layer. Each of the third bus bars is electrically connected to the second conductive layer through one or more first electrode grooves. Each of the fourth bus bars is electrically connected to the first conductive layer through one or more second electrode grooves.

[0018] The plurality of third bus bars and the plurality of fourth bus bars are led out on the same side of the electrochromic film, and the detection groove group is close to the leading-out side of the plurality of third bus bars and the plurality of fourth bus bars.

[0019] In a second aspect, the present application provides an electrochromic device, which comprises a first substrate layer, a second substrate layer, and the electrochromic film according to any one of the preceding embodiments, the electrochromic film is arranged between the first substrate layer and the second substrate layer, the first substrate layer is provided with a first through hole, the second substrate layer is provided with a second through hole, the first through hole is in communication with the first detection groove, and the second through hole is in communication with the second detection groove.

[0020] In a third aspect, the present application provides an electrochromic system, which comprises a terminal platform, a control device, and the electrochromic film or the electrochromic device according to any one of the preceding embodiments; the control device is used for information interaction with the terminal platform to control the electrochromic device or the electrochromic film.

[0021] In an embodiment, the control device comprises a driver, a processor, and a detection device, the detection device is used for obtaining a film voltage between the first conductive layer and the second conductive layer by connecting the groove bottom of the first detection groove and the groove bottom of the second detection groove, the processor is used for determining a driving voltage based on the film voltage, and the driver is used for outputting the driving voltage to the electrochromic film.

[0022] The electrochromic film provided by the present application comprises a detection groove group, and the part of the first conductive layer and the part of the second conductive layer respectively constitute the groove bottom of the first detection groove and the groove bottom of the second detection groove, so that two electrodes of a voltmeter or the like detection device are respectively connected to the groove bottom of the first detection groove and the groove bottom of the second detection groove, and the film voltage at the detection groove group can be detected.

[0023] In the present application, by the arrangement of the detection groove group, the actual voltage of the electrochromic film can be more accurately and more conveniently obtained, which is conducive to avoiding that the voltage on the electrochromic film exceeds the safe range during the charging and discharging process, and is conducive to increasing the service life of the electrochromic film.

[0024] At the same time, since the detection device accurately obtains the voltage on the electrochromic film through the detection groove group, the color change of the electrochromic film can be more accurately controlled, and under the condition that the safe voltage of the electrochromic film is not exceeded, the applied voltage to the electrochromic film can be as high as possible, thereby being conducive to improving the color change rate of the electrochromic film. BRIEF DESCRIPTION OF DRAWINGS

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a cross-sectional schematic diagram of an existing electrochromic film;

[0027] Figure 2 This is a cross-sectional schematic diagram of the electrochromic film provided in an embodiment of this application;

[0028] Figure 3 A top perspective view of the electrochromic film provided in the embodiments of this application;

[0029] Figure 4 for Figure 3 Enlarged diagram of part A in the diagram;

[0030] Figure 5 A top perspective view of another electrochromic film provided in an embodiment of this application;

[0031] Figure 6 for Figure 5 Enlarged schematic diagram of part B in the diagram;

[0032] Figure 7 for Figure 5 A sectional view.

[0033] Icons: 1-First substrate layer; 2-First conductive layer; 20-First busbar; 21-Third busbar; 22-First electrode groove; 3-Electrochromic layer; 31-Electrochromic material layer; 32-Electrolyte layer; 33-Ion storage layer; 4-Second conductive layer; 40-Second busbar; 41-Fourth busbar; 42-Second electrode groove; 5-Second substrate layer; 6-Detection groove group; 60-First detection groove; 600-First conductive element; 61-Second detection groove; 610-Second conductive element; 7-Non-visible area; 9-Leading circuit board; 90-Positive lead; 91-Negative lead; 92-Glass layer. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0036] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] Example:

[0038] like Figure 2 As shown, the electrochromic film provided in this embodiment includes a first substrate layer 1, a first conductive layer 2, an electrochromic layer 3, a second conductive layer 4, and a second substrate layer 5 stacked sequentially, and also includes a detection groove group 6; the detection groove group 6 includes a first detection groove 60 and a second detection groove 61, the first detection groove 60 extends from the first substrate layer 1 to the surface of the second conductive layer 4, and the second detection groove 61 extends from the second substrate layer 5 to the surface of the first conductive layer 2, the bottom of the first detection groove 60 and the bottom of the second detection groove 61 are used to be electrically connected to the two electrodes of the detection device, respectively.

[0039] Along the thickness direction of the electrochromic film, the first detection groove 60 sequentially penetrates the first substrate layer 1, the first conductive layer 2, and the electrochromic layer 3. A portion of the second conductive layer 4 forms the bottom of the first detection groove 60.

[0040] The second detection groove 61 passes through the second substrate layer 5, the second conductive layer 4, and the electrochromic layer 3 in sequence. A portion of the first conductive layer 2 forms the bottom of the second detection groove 61.

[0041] In one embodiment, the bottom of the first detection groove 60 and the second detection groove 61 can be formed using processes such as laser cutting. For example, after the first base layer 1, the first conductive layer 2, the electrochromic layer 3, the second conductive layer 4, and the second base layer 5 are sequentially stacked and cured, the first detection groove 60 and the second detection groove 61 are formed by processes such as laser cutting.

[0042] The shape and size of the first detection groove 60 and the second detection groove 61 are not limited and can be selected according to actual needs. In one embodiment, both the first detection groove 60 and the second detection groove 61 are cuboid in shape. In another embodiment, the bottom of the first detection groove 60 and the bottom of the second detection groove 61 are both squares with a side length of 5mm.

[0043] The bottom of the first detection slot 60 and the bottom of the second detection slot 61 are used to connect to the two electrodes of a detection device (such as a voltmeter). Figures 2 to 6As shown, the groove bottom of the first detection groove 60 can be used for connecting with the negative pole of the voltmeter, and the groove bottom of the second detection groove 61 can be used for connecting with the positive pole of the voltmeter.

[0044] It should be noted that the electrochromic layer 3 generally comprises an electrochromic material layer 31, an electrolyte layer 32 and an ion storage layer 33 which are sequentially stacked, and the first conductive layer 2 is attached to the electrochromic material layer 31, and the second conductive layer 4 is attached to the ion storage layer 33. Based on this, at the groove bottom of the first detection groove 60, the voltmeter actually detects the voltage on the ion storage layer 33, that is, the negative pole voltage, and at the groove bottom of the second detection groove 61, the voltmeter actually detects the voltage on the electrochromic layer 3, that is, the positive pole voltage.

[0045] Since the first detection groove 60 penetrates to the second conductive layer 4, and the second detection groove 61 penetrates to the first conductive layer 2, the two electrodes of the detection device can be directly inserted into the first detection groove 60 and the second detection groove 61 respectively, so as to be connected with the groove bottom of the first detection groove 60 and the groove bottom of the second detection groove 61 respectively, thereby realizing the detection of the voltage between the second conductive layer 4 and the first conductive layer 2 at the detection groove group 6. The opening of the first detection groove 60 and the second detection groove 61 improves the convenience of detecting the voltage of the electrochromic film.

[0046] In addition, since the detection device directly obtains the voltage between the second conductive layer 4 and the first conductive layer 2 at the detection groove group 6, that is, the detection device obtains the real and accurate film voltage on the electrochromic film, it is convenient to accurately control the color change of the electrochromic film based on the film voltage, so as to improve the color change speed of the electrochromic film. At the same time, it is also helpful to avoid the voltage on the electrochromic film exceeding the safe range during the charging and discharging process, and is helpful to prolong the service life of the electrochromic film.

[0047] In an embodiment, the electrochromic film further comprises a first conductive piece 600 and a second conductive piece 610. One end of the first conductive piece 600 is located in the first detection groove 60 and is electrically connected with the groove bottom of the first detection groove 60. The other end of the first conductive piece 600 is located outside the first detection groove 60 and is used for connecting with one electrode of the detection device.

[0048] One end of the second conductive piece 610 is located in the second detection groove 61 and is electrically connected with the groove bottom of the second detection groove 61. The other end of the second conductive piece 610 is located outside the second detection groove 61 and is used for connecting with the other electrode of the detection device.

[0049] The first conductive member 600 and the second conductive member 610 can each be made of a conductive material such as a copper foil, a conductive adhesive, or a conductive ink. When the first conductive member 600 and the second conductive member 610 are each made of a conductive adhesive or a conductive ink, the conductive adhesive or the conductive ink can be filled into the first detection groove 60 after an insulating layer is coated on the groove wall of the first detection groove 60, and the first conductive member 600 is formed after solidification. The conductive adhesive or the conductive ink can be filled into the second detection groove 61 after an insulating layer is coated on the groove wall of the second detection groove 61, and the second conductive member 610 is formed after solidification.

[0050] Alternatively, the first conductive member 600 and the second conductive member 610 can each be a microelectrode. In the process of manufacturing the electrochromic film, the microelectrode can be pre-integrated on the surface or inside of the film structure. Further, the microelectrode can be connected to a voltmeter through an internal lead or through a wireless manner.

[0051] In addition, the first conductive member 600 and the second conductive member 610 can each be a conductive layer or a semiconductive layer structure, which is stacked in the layer structure of the electrochromic film and has a reserved contact point thereon, and which is electrically connected to the groove bottom of the detection groove corresponding thereto and connected to the voltmeter through the reserved contact point thereon.

[0052] In the embodiment, the first conductive member 600 and the second conductive member 610 are provided, so that the detection device can be connected to the groove bottom of the first detection groove 60 outside the first detection groove 60 and connected to the groove bottom of the second detection groove 61 outside the second detection groove 61, and the convenience of connecting the detection device to the groove bottom of the first detection groove 60 and the groove bottom of the second detection groove 61 is improved.

[0053] In an embodiment, one end of the first conductive member 600 is insulated and separated from the groove wall of the first detection groove 60. For example, the outer diameter of the first conductive member 600 is smaller than the inner diameter of the first detection groove 60. Insulating glue is filled between the first conductive member 600 and the inner wall of the first detection groove 60.

[0054] Similarly, one end of the second conductive member 610 is insulated and separated from the groove wall of the second detection groove 61. For example, the outer diameter of the second conductive member 610 is smaller than the inner diameter of the second detection groove 61. Insulating glue is filled between the second conductive member 610 and the inner wall of the second detection groove 61.

[0055] It should be noted that when detecting the film voltage at the detection groove group 6 on the electrochromic film provided in the embodiment, the change of the voltage value can be monitored in real time by a voltmeter, so as to timely monitor and adjust the applied voltage, thereby ensuring that the electrochromic film always works in the optimal voltage range. For example, when it is detected that the film voltage exceeds the set protection voltage when charging or the voltage is lower than the discharge protection voltage when discharging, the applied voltage is immediately reduced to ensure that the film works in a safe and efficient voltage range.

[0056] In an embodiment, when the detection groove group 6 is opened, the first detection groove 60 and the second detection groove 61 can be cut by half-cut energy of a laser cutter such as a carbon dioxide laser, an ultraviolet laser or a fiber laser at a distance of 2 mm from the film structure edge.

[0057] Generally, the electrochromic film includes a visible area and a non-visible area 7 surrounding the outer periphery of the visible area, i.e., the non-visible area is located at the edge of the electrochromic film. The electrochromic film further includes a plurality of bus bars located in the non-visible area 7. The plurality of bus bars are used to connect the first conductive layer 2 and the second conductive layer 4, and are used to receive power supply of the control device and transmit current to the electrochromic film.

[0058] In an embodiment, the detection groove group 6 is arranged in the non-visible area 7 with the bus bar. Figure 3 For example, along the four sides of the electrochromic film, the non-visible area 7 includes four parts, wherein the left and right two parts are respectively used to arrange two bus bars, and the detection groove group 6 is arranged in the left non-visible area 7 and / or the right non-visible area 7.

[0059] In the embodiment of the application, the detection groove group 6 is arranged close to the bus bar, which is beneficial to obtain the maximum film voltage on the electrochromic film. When the film voltage of the electrochromic film is controlled, only the film voltage at the detection groove group 6 needs to be controlled in the safe voltage range, and the voltage at other positions on the electrochromic film will also be within the safe voltage range. In the embodiment of the application, arranging the detection groove group 6 close to the bus bar is beneficial to reduce the number of detection groove groups 6 and reduce the cost.

[0060] In an embodiment, the width of the non-visible area is 15 nm-50 mm. The detection groove group 6 is arranged in the non-visible area at a distance of 5 mm-10 mm from the edge of the non-visible area and the visible area, so as to ensure that the edge burning area possibly generated in the detection process is in the non-visible area, and the user experience is improved.

[0061] Since the size of the detection groove group 6 is smaller than the size of the non-visible area (as described above, the length of the bottom of the first detection groove 60 and the length of the bottom of the second detection groove 61 are both 5 mm), the detection groove group 6 is arranged in the non-visible area, which can effectively hide the detection groove group 6 in the black edge printing area (i.e. the non-visible area) of the finished electrochromic film, without significantly affecting the overall performance and appearance of the film structure, effectively maintaining the original photoelectric performance of the electrochromic film, ensuring product quality, and realizing the integration of the voltage measurement function.

[0062] In addition, the number of detection groove groups 6 provided by the embodiment is not limited, and multiple detection groove groups 6 can be arranged as needed to improve the accuracy of the detection results.

[0063] Since the first detection groove 60 and the second detection groove 61 in the same detection groove group 6 are spaced apart along the extension direction of the bus bar, the accuracy of the film voltage detection result can be effectively improved, and therefore, as shown in Figure 3 and Figure 4 , the first detection groove 60 and the second detection groove 61 in the detection groove group 6 are preferably spaced apart along the extension direction of the bus bar. At this time, the arrangement direction of the first detection groove 60 and the second detection groove 61 in the same detection groove group 6 is parallel to the extension direction of the bus bar.

[0064] As shown in Figure 4 , the interval between the first detection groove 60 and the second detection groove 61 along the extension direction of the bus bar is denoted as a, and in order to effectively improve the detection accuracy of the maximum film voltage, the embodiment preferably satisfies 1 mm≤a≤10 mm. In an embodiment, the interval between the first detection groove 60 and the second detection groove 61 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0065] In the embodiment, if the interval between the first detection groove 60 and the second detection groove 61 is too small, the difficulty of opening the first detection groove 60 and the second detection groove 61 will be increased. If the interval between the first detection groove 60 and the second detection groove 61 is too large, the detection accuracy of the film voltage will be reduced.

[0066] In the embodiment, by adjusting the interval between the first detection groove 60 and the second detection groove 61 within an appropriate range, the processing difficulty of the first detection groove 60 and the second detection groove 61 is reduced, and the detection accuracy of the film voltage is improved.

[0067] Further, the embodiment preferably satisfies a=3 mm, that is, the interval between the first detection groove 60 and the second detection groove 61 in the detection groove group 6 along the extension direction of the bus bar is 3 mm.

[0068] According to the experimental data, the bottom of the first detection slot 60 and the bottom of the second detection slot 61 are both square structures with a side length of 5mm, and the detection accuracy of the maximum diaphragm voltage is best when α is 3mm.

[0069] Based on the arrangement of the busbars, electrochromic films can be divided into single-electrode film structures (such as...). Figure 3 (as shown) and multi-electrode membrane structures (such as) Figure 5 (As shown).

[0070] like Figure 3 As shown, Figure 3 The image shows a single-electrode electrochromic film. The busbars include a first busbar 20 and a second busbar 40. The first busbar 20 is electrically connected to a first conductive layer 2, and the second busbar 40 is electrically connected to a second conductive layer 4. The orthographic projections of the first busbar 20 and the second busbar 40 on the second conductive layer 4 are parallel to each other.

[0071] Because the diaphragm voltage is higher in the region closer to the busbar, therefore for Figure 3 The single-electrode diaphragm structure shown exhibits a trend of low voltage in the middle and high voltage at both ends. Therefore, to measure the maximum diaphragm voltage, the detection slot group 6 is positioned close to either the first busbar 20 or the second busbar 40.

[0072] In one embodiment, when there are multiple detection slot groups 6, then as follows: Figure 3 As shown, a set of detection slots 6 can be provided on the side near the first busbar 20, and another set of detection slots 6 can be provided on the side near the second busbar 40.

[0073] In one embodiment, the detection groove group 6 is disposed close to the first busbar 20, and the distance between the detection groove group 6 and the first busbar 20 is less than the distance between the detection groove group 6 and the center line of the electrochromic film. The distance between the center line of the electrochromic film and the first busbar 20 is equal to the distance between the center line and the second busbar 40.

[0074] In one embodiment, the detection groove group 6 is disposed close to the second busbar 40, and the distance between the detection groove group 6 and the second busbar 40 is less than the distance between the detection groove group 6 and the center line of the electrochromic membrane.

[0075] Since the diaphragm voltage near the busbar is unstable, if the detection slot group 6 is too close to the busbar, the measured diaphragm voltage will be inaccurate. Therefore, in this embodiment, it is preferable that there is a gap between the detection slot group 6 and the busbar. Specifically, when the detection slot group 6 is provided on the side close to the first busbar 20, the vertical distance between the orthographic projection of the detection slot group 6 on the first conductive layer 2 on the side of the first busbar 20 and the orthographic projection of the first busbar 20 on the first conductive layer 2 is 10mm-15mm.

[0076] When the detection groove group 6 is arranged close to one side of the second bus bar 40, the vertical distance between the orthographic projection of the detection groove group 6 on the second conductive layer 4 and the orthographic projection of the second bus bar 40 on the second conductive layer 4 is 10-15 mm.

[0077] The vertical distance between the orthographic projection of the detection groove group 6 on the conductive layer and the bus bar is 10-15 mm, including three cases: ① the vertical distance between the orthographic projection of the first detection groove 60 on the conductive layer and the bus bar and the vertical distance between the orthographic projection of the second detection groove 61 on the conductive layer and the bus bar are both 10-15 mm; ② the vertical distance between the orthographic projection of the first detection groove 60 on the conductive layer and the bus bar is 10-15 mm, and the vertical distance between the orthographic projection of the second detection groove 61 on the conductive layer and the bus bar is greater than the vertical distance between the orthographic projection of the first detection groove 60 on the conductive layer and the bus bar; ③ the vertical distance between the orthographic projection of the second detection groove 61 on the conductive layer and the bus bar is 10-15 mm, and the vertical distance between the orthographic projection of the first detection groove 60 on the conductive layer and the bus bar is greater than the vertical distance between the orthographic projection of the second detection groove 61 on the conductive layer and the bus bar.

[0078] In an embodiment, one end of the first bus bar 20 and one end of the second bus bar 40 are generally used for lead-out. Since the resistance of the bus bar itself can also cause a voltage drop, the closer to the end of the bus bar, the higher the voltage of the membrane structure. At this time, in order to further improve the accuracy of the membrane voltage, when the detection groove group 6 is arranged close to the first bus bar 20, the embodiment preferably has a distance between the detection groove group 6 and one end of the first bus bar 20 smaller than the distance between the detection groove group 6 and the other end of the first bus bar 20. Wherein the distance between the first detection groove 60 and one end of the first bus bar 20 is smaller than the distance between the first detection groove 60 and the other end of the first bus bar 20, and the distance between the second bus bar 40 and one end of the first bus bar 20 is smaller than the distance between the second bus bar 40 and the other end of the first bus bar 20.

[0079] In another embodiment, the detection groove group 6 is arranged close to the second bus bar 40, and the distance between the detection groove group 6 and one end of the second bus bar 40 is smaller than the distance between the detection groove group 6 and the other end of the second bus bar 40.

[0080] When one side of the first bus bar 20 and one side of the second bus bar 40 are both adjacent to the detection groove group 6, the detection groove group 6 can be symmetrically arranged or asymmetrically arranged, in order to improve the reliability of the membrane voltage detection results at multiple detection groove groups 6, such as Figure 3As shown, the first bus bar 20 and the second bus bar 40 are preferably symmetrically arranged, and the detection groove group 6 on one side of the first bus bar 20 and the detection groove group 6 on one side of the second bus bar 40 are symmetrically arranged. At this time, the vertical distance between the detection groove group 6 on one side of the first bus bar 20 and the first bus bar 20 is equal to the vertical distance between the detection groove group 6 on one side of the second bus bar 40 and the second bus bar 40.

[0081] The embodiment also provides a multi-electrode electrochromic film. At this time, the bus bar includes a plurality of third bus bars 21 and a plurality of fourth bus bars 41 (as shown), the electrochromic film is provided with a plurality of first electrode grooves 22, the first electrode grooves 22 pass through from the first base layer 1 to the second conductive layer 4, and each third bus bar 21 is electrically connected to the second conductive layer 4 through one or more first electrode grooves 22. Figure 7

[0082] The electrochromic film is provided with a plurality of second electrode grooves 42, the second electrode grooves 42 pass through from the second base layer 5 to the first conductive layer 2, and the plurality of fourth bus bars 41 are respectively electrically connected to the first conductive layer 2 through the plurality of second electrode grooves 42.

[0083] Among them, the plurality of third bus bars 21 are electrically connected to each other, and the plurality of fourth bus bars 41 are electrically connected to each other. The plurality of first electrode grooves 22 and the plurality of second electrode grooves 42 are located in the non-visible area 7, and the plurality of first electrode grooves 22 and the plurality of second electrode grooves 42 are used to form a plurality of electrodes, and the third bus bar 21 and the fourth bus bar 41 are respectively used to form a multi-electrode connection, thereby improving the electrical conduction rate on the first conductive layer 2 and the second conductive layer 4, thereby improving the color changing rate of the electrochromic film.

[0084] It should be noted that the plurality of first electrode grooves 22 and the plurality of second electrode grooves 42 in the multi-electrode electrochromic film structure are usually also located at the edge of the electrochromic film, and the highest voltage of the film on them is also the area close to the bus bar. Therefore, for the multi-electrode electrochromic film, at least one side of the plurality of third bus bars 21 and the plurality of fourth bus bars 41 is provided with a detection groove group 6 in order to measure the maximum film voltage.

[0085] For example, the electrochromic film includes four sides, and the plurality of first electrode grooves 22 and the plurality of second electrode grooves 42 can be distributed on one side, two sides, three sides, or four sides, and the detection groove group 6 can be distributed on the side with the bus bar and arranged close to the bus bar.

[0086] In addition, as shown in Figure 5 and Figure 6 ​As shown, for the above multi-electrode electrochromic film, the plurality of third bus bars 21 and the plurality of fourth bus bars 41 are led out at the same side of the electrochromic film. The detection groove group 6 is arranged close to the leading-out side of the plurality of third bus bars 21 and the plurality of fourth bus bars 41.

[0087] In an embodiment, the electrochromic film includes a first side and a second side arranged oppositely, the plurality of third bus bars 21 and the plurality of fourth bus bars 41 are led out at the first side of the electrochromic film, and the distance between the detection groove group 6 and the first side is less than the distance between the detection groove group 6 and the second side.

[0088] Specifically, one side of the electrochromic film is also provided with a leading-out circuit board 9 for connecting the bus bars and receiving external power supply, the plurality of third bus bars 21 are all connected with one electrode of the leading-out circuit board 9, and the plurality of fourth bus bars 41 are all connected with another electrode of the leading-out circuit board 9. Alternatively, the number of the leading-out circuit boards 9 is two, the plurality of third bus bars 21 are used to connect one leading-out circuit board 9, and the plurality of fourth bus bars 41 are used to connect the other leading-out circuit board 9.

[0089] The leading-out circuit board 9 can be an FPC (Flexible Printed Circuit, PC for short). The FPC is usually made of polyimide or polyester film as a substrate, and is a highly reliable, excellent flexible printed circuit board with high wiring density, light weight, thin thickness, and good bending properties, which is suitable for use in flexible circuits.

[0090] Since the voltage at the leading-out circuit board 9 is the highest value of the voltage of the entire electrochromic film (the voltage values at other positions of the film structure will not be higher than this due to the voltage drop of the bus bars and the film), when the detection groove group 6 is one, as shown in Figure 5 and Figure 6 shown, the detection groove group 6 is preferably arranged close to the leading-out circuit board 9.

[0091] Specifically, as shown in Figure 5 shown, the positive electrode leading-out wire 90 and the negative electrode leading-out wire 91 of the leading-out circuit board 9 are arranged in parallel. At this time, in order to improve the accuracy of the film voltage detection, the first detection groove 60 and the second detection groove 61 in the detection groove group 6 can also be arranged along the extension direction of the edge of the film structure at the leading-out circuit board 9.

[0092] In an embodiment, the arrangement direction of the detection groove group 6 and the leading-out circuit board 9 is parallel or approximately parallel to the arrangement direction of the first side and the second side of the electrochromic film.

[0093] Further, the interval between the first detection groove 60 and the second detection groove 61 in the arrangement direction of the detection groove group 6 can also be 1mm-10mm. For example, the interval between the first detection groove 60 and the second detection groove 61 is 3mm.

[0094] In an embodiment, the interval between the detection groove group 6 and the third bus bar 21 or the fourth bus bar 41 is 10mm-15mm. For example, as shown in FIG. 6, the detection groove group 6 is arranged close to the third bus bar 21 and the fourth bus bar 41 on the lower side, and the first detection groove 60 and the second detection groove 61 are arranged at intervals in the left-right direction. The interval between the detection groove group 6 and the third bus bar 21 or the fourth bus bar 41 on the lower side is 10mm-15mm. Figure 5

[0095] If there are multiple detection groove groups 6 arranged on the multi-electrode film structure, in order to take into account the film voltage at each edge of the film structure, at least one side of each of the third bus bar 21 and the fourth bus bar 41 is preferably provided with a detection groove group 6.

[0096] When the electrochromic film has a complex shape or special structures on the electrochromic film structure, making it inconvenient or impossible to directly determine the position of the highest voltage point on the electrochromic film, a preliminary experiment can be prepared to measure the position of the highest voltage point. Specifically, a film with the same structure as the electrochromic film can be prepared first, and then it is energized to change color, and the place where the electrochromic film changes color first is marked. The place where the color changes faster is usually the place where the electrochromic film has a higher voltage. Then, a detection groove group 6 is arranged at each place where the color changes faster, and the actual voltage at these detection groove groups 6 when the color changes is recorded. Finally, the highest voltage value in the actual voltage is recorded, and the position of the detection groove group 6 corresponding to the highest voltage value is marked. This position is the position of the highest voltage point. It should be noted that arranging a detection groove group 6 at each place where the color changes faster can maximize the service life of the electrochromic film structure.

[0097] As can be seen, when the electrochromic film provided in the embodiment is a single-electrode electrochromic film or a multi-electrode electrochromic film, the first conductive member 600 led out from the first detection groove 60 and the second conductive member 610 led out from the second detection groove 61 can be used to realize electrical connection between a certain place of the film structure and the detection device. Compared with the voltage detection process in the prior art, in which the voltage of the entire electrochromic film is read through a circulating system, the measurement point is directly arranged on the electrochromic film through the detection groove group 6 in the embodiment, effectively avoiding the influence of factors such as voltage division of the wire and contact resistance, and accurate perception of the film voltage can be realized.

[0098] ​And since the detection groove set 6 can be arranged at any position of the electrochromic film, the electrochromic film provided by the embodiment can also realize the measurement of the voltage of different areas on the film structure, thereby helping to study and optimize the voltage distribution of the film structure, improving the uniformity of electrochromism, and providing data support for product design and process improvement.

[0099] In addition, the electrochromic film provided by the embodiment can also monitor and adjust the applied voltage at the highest voltage position of the film structure in real time during the film voltage detection, so as to make the film structure always work within the optimal voltage range, effectively improve the electrochromic speed and efficiency of the electrochromic film, effectively optimize the electrochromic process, improve the user experience, and timely find voltage abnormalities to prevent damage to the film caused by overcharging or overdischarging, effectively enhance the safety and reliability of the electrochromic film, prolong the service life of the product, and improve the trust of users on the product. Moreover, the electrochromic film can be integrated with the control device, so that the control device can receive the film voltage detection results on the electrochromic film in real time, thereby realizing intelligent and automatic control of the electrochromic process, effectively improving the functionality and added value of the product, and meeting the market demand for intelligent products.

[0100] It should be further noted that the laser half-cutting technology and the conductive lead process used in the use process of the electrochromic film provided by the embodiment have strong repeatability, are easy to realize on the production line, are suitable for industrial production, and are helpful to improve the production efficiency and product consistency.

[0101] The embodiment also provides an electrochromic device, which comprises a first substrate layer, a second substrate layer and the electrochromic film, the electrochromic film is arranged between the first substrate layer and the second substrate layer, the first substrate layer is provided with a first through hole, the second substrate layer is provided with a second through hole, the first through hole is communicated with the first detection groove 60, and the second through hole is communicated with the second detection groove 61.

[0102] The first substrate layer and the second substrate layer are used to play a protection role, and the first through hole and the second through hole are respectively used to make room for the conductive part, so that the groove bottom of the first detection groove 60 and the groove bottom of the second detection groove 61 can be respectively connected with two electrodes of the detection device.

[0103] As shown in Figure 5 The first substrate layer and the second substrate layer can be a glass layer 92.

[0104] Since the electrochromic device provided by the embodiment comprises the electrochromic film, the electrochromic device and the electrochromic film can solve the same technical problems and achieve the same technical effects, and details are not repeated here.

[0105] The embodiment also provides an electrochromic system, which comprises a terminal platform, a control device, the electrochromic film or the electrochromic device.

[0106] The control device comprises a detection device configured to obtain a film voltage of the electrochromic film, and the control device is configured to regulate a driving voltage provided to the electrochromic film based on the film voltage.

[0107] Further, the control device can comprise a detection device, a processor and a driver, the detection device is configured to obtain the film voltage between the first conductive layer 2 and the second conductive layer 4 by connecting the groove bottom of the first detection groove 60 and the groove bottom of the second detection groove 61. The first conductive layer 2 and the second conductive layer 4 in the electrochromic film provided by the embodiment are also provided with bus bars for facilitating connection with the driver.

[0108] The micro-control device unit is configured to determine the driving voltage based on the film voltage. The driver is configured to provide the driving voltage to the electrochromic film.

[0109] Based on the electrochromic film provided by the embodiment, the embodiment also provides an electrochromic film protection and control method based on real-time voltage monitoring and negative feedback control. The detection device applied in the method is a control device comprising a voltage regulation module.

[0110] Specifically, the electrochromic film protection and control method based on real-time voltage monitoring and negative feedback control provided by the embodiment comprises a threshold setting step, a charging step and a discharging step.

[0111] The threshold setting step: preset the upper limit of the charging voltage and the lower limit of the discharging voltage of the electrochromic film in the control device.

[0112] In the threshold setting step, the upper limit of the charging voltage and the lower limit of the discharging voltage of the detection groove group 6 are related to the electrochemical characteristics of the electrochromic film. The charging voltage upper limit / discharge voltage lower limit is the safe charging / discharging voltage of the electrochromic film. For example, the upper limit of the charging voltage of the detection groove group 6 is +1.3V, and the lower limit of the discharging voltage is -0.6V.

[0113] In an embodiment, the upper limit of the charging voltage and the lower limit of the discharging voltage of the control device can also be preset in the control device. It should be noted that the voltage threshold preset on different control devices can be different. In an embodiment, the upper limit of the charging voltage preset in the control device can be +10V, and the lower limit of the discharging voltage can be -8V.

[0114] The charging step comprises:

[0115] (1) Charging process: the driver applies a forward voltage to the electrochromic film for charging; for example, the initial applied forward voltage can be 10V;

[0116] (2) Voltage monitoring process: the detection device detects the actual voltage at the detection tank group 6 in real time;

[0117] (3) Data processing process: the processor adjusts and determines the driving voltage provided to the electrochromic film based on the actual voltage detected by the detection device in real time. The driver outputs the driving voltage to the electrochromic film. Exemplarily, the control method is as follows:

[0118] The driver applies an initial set voltage to the electrochromic film;

[0119] The detection device detects the actual voltage at the detection tank group 6 in real time;

[0120] The processor determines whether the voltage at the detection tank group 6 is less than +1.3V. If yes, the current voltage is maintained or appropriately increased to accelerate the color change speed. If no, the driving voltage is reduced.

[0121] Further, the processor determines whether the voltage at the detection tank group 6 is less than 1.2V. If yes, the voltage change rate is obtained and determined. If the voltage change rate is greater than 0.1V / s and maintained for more than 3 seconds, it is determined whether the charging applied voltage is greater than or equal to 7V. If yes, the charging voltage is maintained unchanged. If the charging voltage is less than 7V and greater than 1.4V, the charging voltage is gradually increased by a step of 0.3V to accelerate the color change speed.

[0122] When the voltage at the detection tank group 6 is greater than 1.2V and less than 1.3V: the voltage before increasing the charging voltage is restored to protect the electrochromic film;

[0123] If the voltage at the detection tank group 6 is greater than or equal to +1.3V, the following process is performed: the driver reduces the output driving voltage to prevent overvoltage of the electrochromic film.

[0124] Further, in the data processing process, in order to reserve the reaction time and avoid that the film voltage exceeds the threshold value, when the voltage at the detection tank group 6 is higher than 1.28V, the driver adjusts the step of the voltage. Specifically, if the charging applied voltage is 5-10V, the step of the voltage is reduced by 2.5V; if the charging applied voltage is 2.5-5V, the step of the voltage is reduced by 0.5V; if the charging applied voltage is 1.4-2.5V, the step of the voltage is reduced by 0.2V. It should be noted that the minimum charging applied voltage is not less than 1.4V. At this time, the charging applied voltage can be maintained at 1.4V until the electrochromic film reaches the required transmittance.

[0125] In addition, the charging step includes:

[0126] (1) Discharge process: the control device controls the power supply to apply a reverse voltage to the electrochromic film for discharging; the initial applied reverse voltage can be -8V;

[0127] (2) Voltage monitoring process: the detection device detects the actual voltage at the detection groove group 6 in real time;

[0128] (3) Data processing process: the processor adjusts and determines the driving voltage provided to the electrochromic film based on the actual voltage detected by the detection device in real time. The driver outputs the driving voltage to the electrochromic film. Exemplarily, the control method is as follows:

[0129] The driver applies an initial set voltage to the electrochromic film;

[0130] The detection device detects the actual voltage at the detection groove group 6 in real time;

[0131] The processor determines whether the voltage at the detection groove group 6 is greater than -0.6V, if yes, the current voltage is maintained or appropriately reduced to accelerate the fading. If not, the driving voltage is increased to prevent under-voltage.

[0132] Further: the processor determines whether the voltage value at the detection groove group 6 is greater than -0.6V, if yes, it is determined whether the voltage change rate is less than -0.1V / s and maintained for more than 3 seconds: if yes, if the discharge applied voltage is less than -5V, the charging voltage is maintained unchanged; if the discharge voltage is greater than -5V and less than -0.8V, the discharge voltage is gradually reduced by a step of -0.2V to accelerate the color change speed;

[0133] When the voltage at the detection groove group 6 is less than -0.5V: the voltage before the discharge voltage is reduced is restored to protect the electrochromic film;

[0134] If the voltage at the detection groove group 6 is ≤-0.6V: the following process is performed: the driver increases the output driving voltage to prevent the electrochromic film from being under-voltage (over-discharged).

[0135] Further, in the data processing process, in order to reserve the reaction time and avoid the film voltage exceeding the threshold value, when the voltage at the detection groove group 6 is less than -0.58V, the driver adjusts the step of the driving voltage to increase the driving voltage. Specifically, if the discharge applied voltage is -8 to -4V, the step of the voltage is adjusted to 2V; if the discharge applied voltage is -4 to -1.5V, the step of the voltage is increased to 0.5V; if the discharge applied voltage is -1.5 to -0.8V, the step of the voltage is increased to 0.2V. It should be noted that the maximum discharge applied voltage is not higher than -0.8V, at this time the discharge applied voltage can be maintained at -0.8V until the electrochromic film reaches the required transmittance.

[0136] In addition, the method provided by the embodiment can further include a continuous feedback control step, which includes a cycle monitoring process and a dynamic adjustment process. The continuous feedback control step can be performed simultaneously with the charging step or the discharging step.

[0137] The cycle monitoring process is to continuously monitor the diaphragm voltage to ensure that the diaphragm voltage is always within the safe range. The dynamic adjustment process is to continuously adjust the output of the power supply according to the real-time diaphragm voltage. When the electrochromic diaphragm reaches the expected color change effect or the control device receives a stop instruction, the control device controls the power supply to stop charging and discharging the electrochromic diaphragm.

[0138] In the embodiment, the test point can be selected according to the highest theoretical voltage of the diaphragm structure. At this time, the area with the highest diaphragm voltage can be detected to obtain the maximum actual diaphragm voltage. When the maximum diaphragm voltage on the diaphragm structure is within the safe voltage range, the voltages at other positions of the diaphragm structure will also be within the safe voltage range. Therefore, detecting the area with the highest diaphragm voltage can effectively reduce the risk of damage to the diaphragm structure during the color change process.

[0139] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electrochromic film comprising, in the order, a first substrate layer (1), a first conductive layer (2), an electrochromic layer (3), a second conductive layer (4) and a second substrate layer (5), characterized in that, Further comprising a detection groove group (6); The detection groove group (6) comprises a first detection groove (60) and a second detection groove (61), the first detection groove (60) penetrates from the first substrate layer (1) to the surface of the second conductive layer (4), and the second detection groove (61) penetrates from the second substrate layer (5) to the surface of the first conductive layer (2), and the groove bottom of the first detection groove (60) and the groove bottom of the second detection groove (61) are respectively used for electrical connection with two electrodes of a detection device.

2. The electrochromic louver of claim 1, wherein, The electrochromic film piece comprises bus bars at its edges, and the first detection groove (60) and the second detection groove (61) are spaced apart along the extension direction of the bus bars.

3. The electrochromic louver of claim 2, wherein, The spacing between the first detection groove (60) and the second detection groove (61) in the detection groove group (6) is 1-10 mm.

4. The electrochromic louver of any of claims 1-3, wherein, The electrochromic film piece further comprises a first conductive member (600) and a second conductive member (610), one end of the first conductive member (600) is electrically connected with the groove bottom of the first detection groove (60), and the other end is used for connection with the negative electrode of a detection device, and one end of the second conductive member (610) is electrically connected with the groove bottom of the second detection groove (61), and the other end is used for connection with the positive electrode of a detection device.

5. The electrochromic louver of claim 2 or 3, wherein, The bus bars comprise a first bus bar (20) and a second bus bar (40), the first bus bar (20) is electrically connected with the first conductive layer (2), the second bus bar (40) is electrically connected with the second conductive layer (4), and the normal projection of the first bus bar (20) on the second conductive layer (4) is parallel to the normal projection of the second bus bar (40) on the second conductive layer (4); The first bus bar (20) and the second bus bar (40) are respectively arranged on two sides of the electrochromic film piece, and the detection groove group (6) is close to the first bus bar (20) or the second bus bar (40).

6. The electrochromic louver of claim 5, wherein, The vertical spacing between the normal projection of the detection groove group (6) on the first conductive layer (2) and the normal projection of the first bus bar (20) on the first conductive layer (2) is 10-15 mm; or The vertical spacing between the normal projection of the detection groove group (6) on the second conductive layer (4) and the normal projection of the second bus bar (40) on the second conductive layer (4) is 10-15 mm.

7. The electrochromic louver of claim 5, wherein, One end of the first bus bar (20) is used for leading out, and the spacing between the detection groove group (6) and one end of the first bus bar (20) is less than the spacing between the detection groove group (6) and the other end of the first bus bar (20); or One end of the second bus bar (40) is used for leading out, and the spacing between the detection groove group (6) and one end of the second bus bar (40) is less than the spacing between the detection groove group (6) and the other end of the second bus bar (40).

8. The electrochromic louver of claim 2, wherein, The bus bar comprises a plurality of third bus bars (21) and a plurality of fourth bus bars (41), the electrochromic film is provided with a plurality of first electrode grooves (22) penetrating from the first substrate layer (1) to the second conductive layer (4), and a plurality of second electrode grooves (42) penetrating from the second substrate layer (5) to the first conductive layer (2), each of the third bus bars (21) is electrically connected with the second conductive layer (4) through one or more of the first electrode grooves (22); each of the fourth bus bars (41) is electrically connected with the first conductive layer (2) through one or more of the second electrode grooves (42); The plurality of third bus bars (21) and the plurality of fourth bus bars (41) are led out on the same side of the electrochromic film, and the detection groove group (6) is close to the leading-out side of the plurality of third bus bars and the plurality of fourth bus bars.

9. An electrochromic device, characterized in that, The electrochromic device comprises a first substrate layer, a second substrate layer and the electrochromic film according to any one of claims 1-8, the electrochromic film is arranged between the first substrate layer and the second substrate layer, the first substrate layer is provided with a first through hole, the second substrate layer is provided with a second through hole, the first through hole is communicated with the first detection groove (60), and the second through hole is communicated with the second detection groove (61).

10. An electrochromic system characterized in that, The terminal platform, the control device and the electrochromic film according to any one of claims 1-8 or the electrochromic device according to claim 9 are included, and the control device is used for information interaction with the terminal platform to control the electrochromic device or the electrochromic film.

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