Electrochromic diaphragm and electrochromic device

Abstract

This application provides an electrochromic film and an electrochromic device. The electrochromic film has the following edge regions: a first corner and a second corner, where the angle of the first corner is smaller than the angle of the second corner. A first corner electrode is disposed at the first corner, and a second corner electrode is disposed at the second corner. A first non-corner region is located between the first and second corners and has multiple first electrodes. A lead-out assembly includes a busbar and lead-out electrodes disposed on the busbar. The busbar is connected to the first corner electrode, the second corner electrode, and the first electrodes. The lead-out electrodes are located in the first non-corner region. The length of the first corner electrode is greater than the length of the second corner electrode, and the length of the second corner electrode is greater than the length of the first electrode. The electrochromic film and electrochromic device provided in this application can mitigate the phenomenon of corner electric field superposition.

Description

Technical Field

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

[0002] Electrochromism is a technology that causes electrochromic materials to undergo reversible and stable coloring or fading under the influence of an external voltage. Typically, a busbar is placed on an electrochromic film, connecting the film to an external power source. Applying a voltage across the electrochromic material causes the material to change color in response to variations in the voltage.

[0003] For electrochromic devices with angled edge regions, electric fields often overlap at the corners, leading to overcharging or over-discharging in the corner areas and frequent corner failures, thus affecting the normal use of the device. Utility Model Content

[0004] In view of this, embodiments of this application provide an electrochromic film and an electrochromic device to solve the technical problem that overcharging or over-discharging in the corner areas of existing electrochromic devices leads to corner failure of the devices.

[0005] In a first aspect, embodiments of this application provide an electrochromic film, wherein the edge region of the electrochromic film includes:

[0006] A first corner and a second corner, wherein the angle of the first corner is smaller than the angle of the second corner, a first corner electrode is provided at the first corner, and a second corner electrode is provided at the second corner;

[0007] A first non-corner region is located between the first corner and the second corner, and the first non-corner region is provided with a plurality of first electrodes;

[0008] The lead-out assembly includes a busbar and lead-out electrodes disposed on the busbar. The busbar is connected to the first corner electrode, the second corner electrode, and the first electrode. The lead-out electrodes are located in the first non-corner area.

[0009] Wherein, the length of the first corner electrode is greater than the length of the second corner electrode, and the length of the second corner electrode is greater than the length of the first electrode.

[0010] In applications, the smaller the angle of a corner, the closer the two sides forming the corner are. Therefore, if an electrode is placed at the corner, the electric field superposition phenomenon at the corner becomes more pronounced, making corners with smaller angles more prone to discoloration failure. Based on this, in this embodiment, the angle of the first corner is smaller than the angle of the second corner, so discoloration failure is more likely to occur at the first corner. Therefore, the length of the first corner electrode located at the first corner is set to be longer, specifically longer than the length of the second corner electrode, and the length of the second corner electrode is longer than the length of the first electrode located in the first non-corner area. This makes the color changes of the electrochromic film at the first and second corners more consistent, mitigating or avoiding the electric field superposition phenomenon, thereby ensuring that the corner area of ​​the electrochromic film does not fail.

[0011] In some embodiments, the edge region of the electrochromic film further includes:

[0012] The third corner and the fourth corner, wherein the angle of the third corner is smaller than the angle of the fourth corner, the third corner and the fourth corner are located on one side of the electrochromic film, the first corner and the second corner are located on the other side of the electrochromic film, a third corner electrode is provided at the third corner, and a fourth corner electrode is provided at the fourth corner;

[0013] The second non-corner region is located between the third corner and the fourth corner, and the second non-corner region is provided with a plurality of second electrodes;

[0014] In this embodiment, the length of the third corner electrode is greater than or equal to the length of the fourth corner electrode, and the length of the fourth corner electrode is greater than the length of the second electrode. Since the angle of the third corner is smaller than that of the fourth corner, discoloration failure is more likely to occur at the third corner. Therefore, the length of the third corner electrode is set to be longer than that of the fourth corner electrode, and the fourth corner electrode is longer than the length of the second electrode located in the second non-corner area. This makes the discoloration of the electrochromic film at the third and fourth corners more consistent, mitigating or avoiding the phenomenon of electric field superposition, thereby ensuring that the corner areas of the electrochromic film do not fail.

[0015] In some embodiments, the length of the first electrode is greater than the length of the second electrode. In this application embodiment, the length of the electrode (first electrode) located in the first non-corner region where the lead-out electrode is located is set to be greater than the length of the electrode (second electrode) located in the second non-corner region far from the lead-out electrode. In other words, as the electrode length increases, the number of electrodes that can be placed in the first non-corner region decreases, resulting in sparser electrodes in the first non-corner region and denser electrodes in the second non-corner region. This balances the color-changing speed of the first and second non-corner regions, thereby achieving a uniform color-changing effect from the periphery to the center of the electrochromic film, effectively solving the problem of uneven color change.

[0016] In some embodiments, the angles of the first corner and the second corner are 60° to 130°.

[0017] In some embodiments, the length of the first corner electrode is 100mm to 250mm.

[0018] In some embodiments, the length of the second corner electrode is 100mm to 250mm.

[0019] In some embodiments, the length of the first electrode is 80mm to 150mm.

[0020] In some embodiments, the distance between the lead-out electrode and the first corner is L1, and the distance between the lead-out electrode and the second corner is L2, where L2 < L1. This balances the color-changing rates of the first and second corners. The design principle here is that if the lead-out electrode is located in the center of the first non-corner area, the color change at the first corner will be faster than that at the second corner, making the first corner prone to color-changing failure. Therefore, placing the lead-out electrode closer to the second corner slows down the color-changing rate at the first corner and accelerates the color-changing rate at the second corner.

[0021] In some embodiments, the electrochromic film further includes:

[0022] The first side has a first surface and a second surface arranged opposite to each other. Multiple positive electrodes are formed on the edge of the first surface, and multiple negative electrodes are formed on the edge of the second surface.

[0023] The busbar includes a first busbar and a second busbar, wherein the first busbar is connected to all of the positive electrodes and the second busbar is connected to all of the negative electrodes;

[0024] The lead-out electrode includes a first lead-out electrode and a second lead-out electrode, wherein the first lead-out electrode is disposed on the first busbar and the second lead-out electrode is disposed on the second busbar;

[0025] Both the first and second lead-out electrodes are located on the first side. By connecting a first busbar to multiple positive electrodes and a second busbar to multiple negative electrodes, and then connecting the first lead-out electrode to the first busbar and the second lead-out electrode to the second busbar, only one pair of lead-out electrodes is needed to connect to the external circuit, i.e., to apply voltage to the diaphragm body. This saves space, facilitates wiring between the external circuit and the electrochromic diaphragm, and simplifies the design of the lead-out electrodes.

[0026] In some embodiments, the electrochromic film includes a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second substrate layer stacked sequentially.

[0027] The electrochromic film has multiple first grooves on one side of its edge, exposing a portion of the second conductive layer to form multiple positive electrodes. The electrochromic film has multiple second grooves on the other side of its edge, exposing a portion of the first conductive layer to form multiple negative electrodes. The first grooves and the second grooves are arranged alternately.

[0028] The first busbar is located on the side of the first substrate layer away from the first conductive layer, and the second busbar is located on the side of the second substrate layer away from the second conductive layer. Electrodes are directly formed by exposing the conductive layer through slotting, a design that avoids the addition of extra electrode material and simplifies the process. The staggered slots achieve a more uniform current distribution because the electrodes are not continuous strips but segmented, resulting in a more uniform electric field distribution and preventing uneven discoloration at the edges of the electrochromic film.

[0029] In some embodiments, the first busbar is further covered with a first adhesive layer, the side of the first adhesive layer near the middle of the electrochromic film is connected to the first base layer, and the side of the first adhesive layer near the edge of the electrochromic film is connected to the second conductive layer.

[0030] The second busbar is also covered with a second adhesive layer. The side of the second adhesive layer near the center of the electrochromic film is connected to the second substrate layer, and the side of the second adhesive layer near the edge of the electrochromic film is connected to the first conductive layer. By covering the busbar with an adhesive layer, and the side of the adhesive layer near the center of the electrochromic film being connected to the first substrate layer (attached to the first substrate), and the side of the first adhesive layer near the edge of the electrochromic film being connected to the second conductive layer, the adhesive layer can limit and fix the busbar corresponding to the groove, thereby improving the stability of the connection between the busbar and the second conductive layer in the first groove. That is, the adhesive layer can further improve the stability of the busbar at the edge of the electrochromic film. Moreover, the adhesive layer forms an insulating barrier layer on the surface of the busbar, which can prevent polyvinyl butyral from entering the electrochromic film through the first groove during the subsequent lamination process and reacting with the electrochromic material layer. It can also prevent external moisture, dust or other conductive substances from entering the interior of the electrochromic film through the first groove.

[0031] In some embodiments, the first busbar is further covered with a first adhesive layer, the first adhesive layer being connected to the first substrate layer on the side near the center of the electrochromic film. The second busbar is further covered with a second adhesive layer, the second adhesive layer being connected to the second substrate layer on the side near the center of the electrochromic film. Both the first and second adhesive layers extend outward to cover the edge of the electrochromic film. Thus, neither the first nor the second adhesive layer is adhered to the conductive layer; instead, they extend outward to the edge of the electrochromic film and bond together. This design better prevents moisture and dust from entering the interior of the electrochromic film, thereby protecting the edge of the film.

[0032] Secondly, embodiments of this application provide an electrochromic device, including the electrochromic film described in the first aspect. The electrochromic device provided in this application, including the electrochromic film described in the first aspect, therefore possesses all the beneficial effects described in the first aspect. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the electrochromic film provided in the embodiments of this application;

[0035] Figure 2This is a schematic diagram of the electrode arrangement of the electrochromic film provided in the embodiments of this application;

[0036] Figure 3 This is a schematic diagram of the structure of an electrochromic film provided in another embodiment of this application;

[0037] Figure 4 This is a schematic diagram showing the distance relationship between the lead-out component and the corner in the electrochromic film provided in the embodiments of this application;

[0038] Figure 5 This is a schematic diagram showing the placement of the lead-out components in the electrochromic film provided in this application embodiment;

[0039] Figure 6 This is a cross-sectional view of the first side of the electrochromic film provided in the embodiments of this application;

[0040] Figure 7 This is a side view of the first side of the electrochromic film provided in the embodiments of this application;

[0041] Figure 8 This is a schematic diagram of the busbar and adhesive layer structure of the electrochromic film provided in the embodiments of this application. Figure 1 ;

[0042] Figure 9 This is a schematic diagram of the busbar and adhesive layer structure of the electrochromic film provided in the embodiments of this application. Figure 2 ;

[0043] Figure 10 This is a schematic diagram of the busbar and adhesive layer of an electrochromic film provided in another embodiment of this application. Figure 1 ;

[0044] Figure 11 This is a schematic diagram of the busbar and adhesive layer of an electrochromic film provided in another embodiment of this application. Figure 2 ;

[0045] Figure 12 This is a schematic diagram of the electrochromic device provided in the embodiments of this application.

[0046] The attached icon numbers are as follows:

[0047] 10. Electrochromic film; 100. First corner; 1000. First corner electrode; 101. Second corner; 1010. Second corner electrode; 102. First non-corner area; 1020. First electrode; 103. Third corner; 1030. Third corner electrode; 104. Fourth corner; 1040. Fourth corner electrode; 105. Second non-corner area; 1050. Second electrode; 106. First groove; 107. Second groove; 108. First edge;

[0048] 11. First substrate layer; 12. First conductive layer; 13. Electrochromic layer; 14. Second conductive layer; 15. Second substrate layer; 16. Lead-out assembly; 161. Busbar; 1610. First busbar; 1611. Second busbar; 1612. First adhesive layer; 1613. Second adhesive layer; 162. Lead-out electrode; 1620. First lead-out electrode; 1621. Second lead-out electrode;

[0049] 20. Glass; 21. Installation part. Detailed Implementation

[0050] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that the embodiments of this application can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the embodiments of this application with unnecessary detail.

[0051] It should also be understood that the term "and / or" as used in the specification of embodiments of this application and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0052] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0053] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0054] Furthermore, in the description of the embodiments and the appended claims of this application, the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0055] In the description of embodiments in this application, references to "some embodiments" or "some embodiments" mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in some embodiments," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiments, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. "A plurality" refers to two or more.

[0056] This application provides an electrochromic film 10, such as... Figure 1 and Figure 2 As shown, the edge region of the electrochromic film 10 includes a first corner 100, a second corner 101, and a first non-corner region 102;

[0057] The angle of the first corner 100 is smaller than the angle of the second corner 101. A first corner electrode 1000 is provided at the first corner 100, and a second corner electrode 1010 is provided at the second corner 101.

[0058] The first non-corner region 102 is located between the first corner 100 and the second corner 101, and the first non-corner region 102 is provided with a plurality of first electrodes 1020;

[0059] The lead-out assembly 16 includes a busbar 161 and a lead-out electrode 162 disposed on the busbar 161. The busbar 161 is connected to the first corner electrode 1000, the second corner electrode 101 and the first electrode 1020. The lead-out electrode 162 is located in the first non-corner region 102.

[0060] The length of the first corner electrode 1000 is greater than the length of the second corner electrode 1010, and the length of the second corner electrode 1010 is greater than the length of the first electrode 1020.

[0061] In applications, the smaller the angle of a corner, the closer the two sides forming the corner are. This results in a more pronounced superposition of electric fields at the corner, making corners with smaller angles more prone to discoloration failure. Therefore, in this embodiment, the angle of the first corner 100 is smaller than the angle of the second corner 101. Since discoloration failure is more likely to occur at the first corner 100, the length of the first corner electrode 1000 located at the first corner 100 is set to be slightly longer, specifically longer than the length of the second corner electrode 1010. Furthermore, the length of the second corner electrode 1010 is longer than the length of the first electrode 1020 located in the first non-corner region 102. This ensures that the discoloration of the electrochromic film 10 at the first corner 100 and the second corner 101 is nearly identical, mitigating the superposition of electric fields at the first corner 100 and thus ensuring that the corner region of the electrochromic film 10 does not fail.

[0062] It should be noted that the length of the electrodes mentioned above refers to the length of the electrode along the edge of the electrochromic film 10. For example, the length of the first electrode 1020 located in the first non-corner region 102 refers to the distance along the side length of the electrochromic film 10. The electrodes located in the corner region include the first corner electrode 1000 and the second corner electrode 1010. The first corner electrode 1000 includes two parts: one part is located on the edge of one side of the electrochromic film 10, and the other part is located on the edge of an adjacent side. The length of the first corner electrode 1000 refers to the sum of the lengths of these two parts of the electrode on their respective sides. Similarly, the second corner electrode 1010 is also like this.

[0063] In some embodiments, such as Figure 2 and Figure 3 As shown, the edge region of the electrochromic film 10 also includes a third corner 103, a fourth corner 104, and a second non-corner region 105;

[0064] The angle of the third corner 103 is smaller than the angle of the fourth corner 104. The third corner 103 and the fourth corner 104 are located on one side of the electrochromic film 10, and the first corner 100 and the second corner 101 are located on the other side of the electrochromic film 10. A third corner electrode 1030 is provided at the third corner 103, and a fourth corner electrode 1040 is provided at the fourth corner 104.

[0065] The second non-corner region 105 is located between the third corner 103 and the fourth corner 104, and the second non-corner region 105 is provided with a plurality of second electrodes 1050;

[0066] The length of the third corner electrode 1030 is greater than or equal to the length of the fourth corner electrode 1040, and the length of the fourth corner electrode 1040 is greater than the length of the second electrode 1050.

[0067] In this embodiment, the angle of the third corner 103 is smaller than that of the fourth corner 104, so discoloration failure is more likely to occur at the third corner 103. Therefore, the length of the third corner electrode 1030 located at the third corner 103 is set to be longer, specifically longer than the length of the fourth corner electrode 1040. Furthermore, the length of the fourth corner electrode 1040 is longer than that of the second electrode 1050 located in the second non-corner region 105. This makes the discoloration of the electrochromic film 10 at the third corner 103 and the fourth corner 104 more consistent, slowing down or avoiding the occurrence of electric field superposition, thereby ensuring that the corner region of the electrochromic film 10 will not fail.

[0068] In application, taking the electrochromic film 10 as a quadrilateral film as an example, the electrochromic film 10 has four sides and four corners, wherein the first corner 100 and the second corner 101 are located on the first side 108, the second corner 101 and the third corner 103 are located on the second side, the third corner 103 and the fourth corner 104 are located on the third side, and the fourth corner 104 and the first corner 100 are located on the fourth side, wherein the first side 108 and the second side are arranged opposite each other, and the third side and the fourth side are arranged opposite each other.

[0069] It should be noted that the corner areas mentioned above refer to those formed by any two intersecting edges of the electrochromic film 10, and the corners are usually L-shaped, V-shaped, etc. The angle of the first corner 100 refers to the included angle formed by the two edges of the electrochromic film 10 forming the first corner 100. Similarly, the angle of the second corner 101 refers to the included angle formed by the two edges of the electrochromic film 10 forming the second corner 101, the angle of the third corner 103 refers to the included angle formed by the two edges of the electrochromic film 10 forming the third corner 103, and the angle of the fourth corner 104 refers to the included angle formed by the two edges of the electrochromic film 10 forming the fourth corner 104.

[0070] In some embodiments, such as Figures 1 to 3 As shown, the length of the first electrode 1020 is greater than the length of the second electrode 1050. In this embodiment, the length of the electrode (first electrode 1020) located in the first non-corner region 102 where the lead-out electrode 162 is located is set to be greater than the length of the electrode (second electrode 1050) located in the second non-corner region 105 far from the lead-out electrode 162. In other words, with the increased electrode length, the number of electrodes that can be placed on the first non-corner region 102 decreases, so the electrodes on the first non-corner region 102 are relatively sparse, while the electrodes on the second non-corner region 105 are relatively dense. This balances the color-changing speed of the first non-corner region 102 and the second non-corner region 105, thereby achieving a uniform color-changing effect from the periphery to the center of the electrochromic film 10, effectively solving the problem of uneven color changing.

[0071] In some embodiments, the angle of the first corner 100 and the angle of the second corner 101 are 60° to 130°. The angle of the first corner 100 and the angle of the second corner 101 can be any value within the range of 60° to 130°, such as 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, or 130°. Furthermore, the angle of the first corner 100 is smaller than the angle of the second corner 101. In some embodiments, the first corner 100 is an acute angle, and the second corner 101 is an obtuse angle.

[0072] In some embodiments, the length of the first corner electrode 1000 is 100mm to 250mm. In some embodiments, the length of the second corner electrode 1010 is 100mm to 250mm. In application, the length of the first corner electrode 1000 and the length of the second corner electrode 1010 can be any value within the range of 100mm to 250mm, such as 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 130mm, 135mm, 140mm, 145mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 225mm, 230mm, 240mm, 250mm, etc. By setting the lengths of the first corner electrode 1000 and the second corner electrode 1010 within the range of 100mm to 250mm, it is ensured that they are longer than the lengths of the first electrode 1020 and the second electrode 1050 located in the non-corner area, and the lengths of the corner electrodes are also avoided from being too long and affecting the color change.

[0073] In some embodiments, the length of the first electrode 1020 is 80mm to 150mm. In applications, the length of the first electrode 1020 can be any value within the range of 80mm to 150mm, such as 80mm, 90mm, 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 130mm, 135mm, 140mm, 145mm, or 150mm. The longer the electrode, the fewer electrodes are required. In practical applications, if one or more electrodes fail, it is desirable to have spare electrodes available. Therefore, a length of 80mm to 125mm is generally considered reasonable. Since the color-changing uniformity of the electrochromic film 10 is directly related to the current distribution of the electrodes, an electrode that is too short may result in excessively high current density at the edges and insufficient current in the center, leading to uneven color changing.

[0074] In some embodiments, such as Figure 4As shown, the distance between the lead-out electrode 162 and the first corner 100 is L1, and the distance between the lead-out electrode 162 and the second corner 101 is L2, where L2 < L1. This balances the color-changing rates of the first corner 100 and the second corner 101. The design principle here is that if the lead-out electrode 162 is located in the middle of the first non-corner area 102, the color change at the first corner 100 will be faster than that at the second corner 101, making the first corner 100 prone to color-changing failure. Therefore, by placing the lead-out electrode 162 closer to the second corner 101, the color-changing rate at the first corner 100 can be slowed down, while the color-changing rate at the second corner 101 can be accelerated.

[0075] In some embodiments, such as Figure 5 As shown, the electrochromic film 10 also includes a first side 108, which has a first surface and a second surface disposed opposite to each other. A plurality of positive electrodes are formed on the edge of the first surface, and a plurality of negative electrodes are formed on the edge of the second surface.

[0076] Busbar 161 includes a first busbar 1610 and a second busbar 1611. The first busbar 1610 is connected to multiple positive electrodes, and the second busbar 1611 is connected to multiple negative electrodes.

[0077] The lead-out electrode 162 includes a first lead-out electrode 1620 and a second lead-out electrode 1621. The first lead-out electrode 1620 is disposed on the first busbar 1610, and the second lead-out electrode is disposed on the second busbar 1611.

[0078] The first lead-out electrode 1620 and the second lead-out electrode 1621 are both located on the first side 108. By setting the first busbar 1610 to connect with multiple positive electrodes and the second busbar 1611 to connect with multiple negative electrodes, and then setting the first lead-out electrode 1620 to connect with the first busbar 1610 and the second lead-out electrode 1621 to connect with the second busbar 1611, only one pair of lead-out electrodes is needed to connect to the external circuit, that is, to apply voltage to the diaphragm body. This saves space, facilitates the wiring of the external circuit to the electrochromic diaphragm 10, and simplifies the design of the lead-out electrodes.

[0079] In the application, the first corner electrode 1000, the second corner electrode 1010, the first electrode 1020, the third corner electrode 1030, the fourth corner electrode 1040, and the second electrode 1050 located on the first side of the electrochromic film 10 are positive electrodes, and the first corner electrode 1000, the second corner electrode 1010, the first electrode 1020, the third corner electrode 1030, the fourth corner electrode 1040, and the second electrode 1050 located on the second side of the electrochromic film 10 are negative electrodes.

[0080] In some embodiments, such as Figure 6 and Figure 7 As shown, the electrochromic film 10 includes a first base layer 11, a first conductive layer 12, an electrochromic layer 13, a second conductive layer 14, and a second base layer 15 stacked sequentially.

[0081] The electrochromic film 10 has multiple first grooves 106 on one side edge and exposes a portion of the second conductive layer 14 to form multiple positive electrodes. The electrochromic film 10 has multiple second grooves 107 on the other side edge and exposes a portion of the first conductive layer 12 to form multiple negative electrodes. The first grooves 106 and the second grooves 107 are arranged alternately.

[0082] The first busbar 1610 is located on the side of the first substrate 11 away from the first conductive layer 12, and the second busbar 1611 is located on the side of the second substrate 15 away from the second conductive layer 14. Electrodes are directly formed by exposing the conductive layer through slotting, a design that avoids the need for additional electrode material and simplifies the process. The staggered slots achieve a more uniform current distribution because the electrodes are not continuous strips but segmented, resulting in a more uniform electric field distribution and preventing uneven discoloration at the edges of the electrochromic film 10.

[0083] In some embodiments, such as Figure 8 and Figure 9 As shown, the first busbar 1610 is also covered with a first adhesive layer 1612. The side of the first adhesive layer 1612 near the middle of the electrochromic film 10 is connected to the first base layer 11, and the side of the first adhesive layer 1612 near the edge of the electrochromic film 10 is connected to the second conductive layer 14.

[0084] The second busbar 1611 is also covered with a second adhesive layer 1613. The side of the second adhesive layer 1613 near the middle of the electrochromic film 10 is connected to the second base layer 15, and the side of the second adhesive layer 1613 near the edge of the electrochromic film 10 is connected to the first conductive layer 12. By covering the busbar with an adhesive layer, and having the adhesive layer connected to the first substrate layer 11 (attached to the first substrate layer 11) on one side near the center of the electrochromic film 10, and the first adhesive layer 1612 connected to the second conductive layer 14 on one side near the edge of the electrochromic film 10, the adhesive layer can limit and fix the busbar at the groove, thereby improving the stability of the connection between the busbar and the second conductive layer 14 in the first groove 106. That is, the adhesive layer can further improve the stability of the busbar at the edge of the electrochromic film 10. Moreover, the adhesive layer forms an insulating barrier layer on the surface of the busbar, which can prevent polyvinyl butyral from entering the electrochromic film 10 through the first groove 106 and reacting with the electrochromic material layer during the subsequent lamination process. At the same time, it can also prevent external moisture, dust or other conductive substances from entering the interior of the electrochromic film 10 through the first groove 106.

[0085] In some embodiments, such as Figure 10 and Figure 11 As shown, the first busbar 1610 is also covered with a first adhesive layer 1612. The side of the first adhesive layer 1612 near the middle of the electrochromic film 10 is connected to the first substrate layer 11. The second busbar 1611 is also covered with a second adhesive layer 1613. The side of the second adhesive layer 1613 near the middle of the electrochromic film 10 is connected to the second substrate layer 15. Both the first adhesive layer 1612 and the second adhesive layer 1613 extend outward to cover the edge of the electrochromic film 10. In this way, the first adhesive layer 1612 and the second adhesive layer 1613 extend outward to the edge of the electrochromic film 10 and bond together with each other. This design can better prevent moisture and dust from entering the interior of the electrochromic film 10, thereby protecting the edge of the film.

[0086] Secondly, embodiments of this application provide an electrochromic device, including the electrochromic film 10 described in the first aspect. The electrochromic device provided in this application, including the electrochromic film 10 described in the first aspect, therefore possesses all the beneficial effects described in the first aspect.

[0087] In some embodiments, such as Figure 12 As shown, the electrochromic device provided in this application embodiment is a car side window containing the electrochromic film described in the first aspect. The car side window includes an electrochromic film 10 and two pieces of glass 20. The electrochromic film 10 is sandwiched between the two pieces of glass 20. The two pieces of glass 20 and the electrochromic film 10 are bonded together by PVB. A sealant or sealing strip (not shown) is provided on the edge of the electrochromic film 10 to seal the electrochromic film 10.

[0088] like Figure 12 As shown, in some embodiments, a mounting portion 21 is provided on the lower side of the glass 20. This mounting portion 21 is used to connect to a drive source, which drives the entire automotive side window glass to rise or fall. In application, a black border is provided on the outer edge of the automotive side window glass to cover the electrodes at the edge of the electrochromic film, thereby improving aesthetics.

[0089] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0090] The above-described embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of the embodiments of this application.

Claims

1. An electrochromic film, characterized by, The edge region of the electrochromic film includes: A first corner and a second corner, wherein the angle of the first corner is smaller than the angle of the second corner, a first corner electrode is provided at the first corner, and a second corner electrode is provided at the second corner; A first non-corner region is located between the first corner and the second corner, and the first non-corner region is provided with a plurality of first electrodes; The lead-out assembly includes a busbar and lead-out electrodes disposed on the busbar. The busbar is connected to the first corner electrode, the second corner electrode, and the first electrode. The lead-out electrodes are located in the first non-corner area. Wherein, the length of the first corner electrode is greater than the length of the second corner electrode, and the length of the second corner electrode is greater than the length of the first electrode.

2. The electrochromic louver of claim 1, wherein, The edge region of the electrochromic film also includes: The third corner and the fourth corner, wherein the angle of the third corner is smaller than the angle of the fourth corner, the third corner and the fourth corner are located on one side of the electrochromic film, the first corner and the second corner are located on the other side of the electrochromic film, a third corner electrode is provided at the third corner, and a fourth corner electrode is provided at the fourth corner; The second non-corner region is located between the third corner and the fourth corner, and the second non-corner region is provided with a plurality of second electrodes; Wherein, the length of the third corner electrode is greater than or equal to the length of the fourth corner electrode, and the length of the fourth corner electrode is greater than the length of the second electrode.

3. The electrochromic louver of claim 2, wherein, The length of the first electrode is greater than the length of the second electrode.

4. The electrochromic louver of claim 1, wherein, The angles of the first corner and the second corner are 60° to 130°.

5. The electrochromic louver of claim 1, wherein, The length of the first corner electrode is 100mm~250mm; And / or, the length of the second corner electrode is 100mm~250mm; And / or, the length of the first electrode is 80mm~150mm.

6. The electrochromic louver of claim 1, wherein, The distance between the lead-out electrode and the first corner is L1, and the distance between the lead-out electrode and the second corner is L2, where L2 < L1.

7. The electrochromic louver of claim 1, wherein, The electrochromic film further includes: The first side has a first surface and a second surface arranged opposite to each other. Multiple positive electrodes are formed on the edge of the first surface, and multiple negative electrodes are formed on the edge of the second surface. The busbar includes a first busbar and a second busbar, wherein the first busbar is connected to all of the positive electrodes and the second busbar is connected to all of the negative electrodes; The lead-out electrode includes a first lead-out electrode and a second lead-out electrode, wherein the first lead-out electrode is disposed on the first busbar and the second lead-out electrode is disposed on the second busbar; Both the first lead-out electrode and the second lead-out electrode are located on the first side.

8. The electrochromic louver of claim 7, wherein, The electrochromic film comprises a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer, which are stacked sequentially. The electrochromic film has multiple first grooves on one side of its edge, exposing a portion of the second conductive layer to form multiple positive electrodes. The electrochromic film has multiple second grooves on the other side of its edge, exposing a portion of the first conductive layer to form multiple negative electrodes. The first grooves and the second grooves are arranged alternately. The first busbar is located on the side of the first substrate layer away from the first conductive layer, and the second busbar is located on the side of the second substrate layer away from the second conductive layer.

9. The electrochromic louver of claim 8, wherein, The first busbar is also covered with a first adhesive layer, the side of the first adhesive layer near the middle of the electrochromic film is connected to the first base layer, and the side of the first adhesive layer near the edge of the electrochromic film is connected to the second conductive layer. The second busbar is also covered with a second adhesive layer. The side of the second adhesive layer near the middle of the electrochromic film is connected to the second base layer, and the side of the second adhesive layer near the edge of the electrochromic film is connected to the first conductive layer. Alternatively, the first busbar is further covered with a first adhesive layer, the first adhesive layer being connected to the first base layer on the side near the middle of the electrochromic film, and the second busbar is further covered with a second adhesive layer, the second adhesive layer being connected to the second base layer on the side near the middle of the electrochromic film, and both the first adhesive layer and the second adhesive layer extending outward to cover the edge of the electrochromic film.

10. An electrochromic device, characterized in that, Includes the electrochromic film as described in any one of claims 1 to 9.

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