Electrochromic diaphragm and end product

Abstract

The application provides an electrochromic film and a terminal product, wherein the electrochromic film comprises: a film body, a plurality of electrodes arranged on the film body; a bus assembly, the bus assembly comprising at least two adjacent bus bars, the two bus bars being arranged on the outer edge of the film body and connecting a plurality of electrodes with the same polarity, and the end portions of the two bus bars being overlapped; and a reinforcing member, the reinforcing member covering the overlapped portions of the two bus bars, and the two ends of the reinforcing member being connected with the two bus bars respectively. The electrochromic film and the terminal product provided by the application solve the problem of open circuit by adding a reinforcing member on the basis of the overlapping of the two adjacent bus bars, the reinforcing member being attached to the overlapped portions of the two bus bars to strengthen the structural strength of the bus bars.

Description

Technical Field

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

[0002] An electrochromic film is a functional film that can reversibly change its optical properties (such as transmittance or reflectance) under an applied voltage. To achieve electrochromism, an electrochromic film typically needs to be electrically connected to an external power source.

[0003] In existing technologies, electrochromic films typically have multiple electrodes along their edges, connected and conductive by busbars. These busbars are usually made of copper foil, with multiple copper foils overlapping to form a complete ring structure. Direct overlap between adjacent copper foils results in insufficient structural strength, leading to poor contact between the overlapping foils during subsequent glass lamination processes, and even causing open circuits, ultimately resulting in film failure. Summary of the Invention

[0004] In view of this, embodiments of this application provide an electrochromic film and a terminal product to solve the technical problem that the existing electrochromic film has low structural strength of the busbar overlap, which easily leads to open circuit.

[0005] In a first aspect, embodiments of this application provide an electrochromic film, comprising: A diaphragm body, wherein multiple electrodes are disposed on the diaphragm body; A busbar assembly, the busbar assembly comprising at least two adjacent busbars, the two busbars being disposed at the outer edge of the diaphragm body and connected to a plurality of electrodes having the same conduction polarity, the ends of the two busbars being overlapped; The reinforcement member covers the overlap of the two busbars, and its two ends are respectively connected to the two busbars.

[0006] In existing technologies, adjacent busbars are connected directly by end overlap. However, during subsequent handling or lamination, displacement between adjacent busbars may occur, leading to a break in the electrochromic diaphragm. This application addresses this issue by adding a reinforcement at the overlap of two busbars. This reinforcement transforms the overlap of the two busbars into a single unit, enhancing the structural strength of the overlap. During glass lamination, the reinforcement can withstand lamination pressure and environmental temperature changes, preventing loosening of the overlap and thus avoiding failure at the busbar overlap. This reduces the risk of diaphragm malfunction due to breakage, improving product yield and lifespan.

[0007] In some embodiments, two adjacent busbars are connected by conductive adhesive. The conductive adhesive between the busbars not only ensures electrical conductivity but also further strengthens the overlap between them. In some embodiments, both ends of the reinforcement are connected to two adjacent busbars by conductive adhesive. The conductive adhesive at both ends of the reinforcement further firmly bonds the reinforcement to the busbars, forming a sandwich structure covering the overlap points, significantly enhancing the overlap strength between the busbars. This ensures a continuous and stable connection and conductive path from the busbars to the reinforcement. It effectively prevents interface loosening or displacement due to stress in subsequent processes, greatly reducing the risk of open circuits and thus ensuring the long-term reliability of the electrochromic function.

[0008] In some embodiments, the reinforcing component is a metallic conductive element. Thus, in addition to mechanical reinforcement, an additional electrical parallel path is provided, greatly reducing the risk of circuit breakers and significantly improving the electrical redundancy and reliability of the system.

[0009] In some embodiments, the membrane body includes an adjacent first membrane edge and a second membrane edge, wherein the first membrane edge and the second membrane edge intersect to form an angle; The busbar assembly includes a first busbar, a second busbar, and a third busbar. The first busbar is disposed on the edge of the first membrane, the second busbar is disposed on the edge of the second membrane, and the third busbar is disposed at the corner. The two ends of the third busbar overlap with the first busbar and the second busbar, respectively. Both the third busbar and the reinforcement are contoured structures of the corner. One end of the reinforcement covers the overlap between the first and third busbars, and the other end covers the overlap between the second and third busbars. Thus, the corner-conforming third busbar, acting as a specialized corner connector, effectively improves stress distribution at the corner and avoids tearing or peeling that easily occurs at the overlap. The contoured reinforcement perfectly fits the corner shape, simultaneously covering and fixing the two overlap points of the three busbars (the first busbar and the third busbar, and the second busbar and the third busbar) in one go. This makes the entire corner area a high-strength, integrated structural unit, effectively resisting mechanical and thermal stresses from all directions and preventing any form of displacement or separation.

[0010] In some embodiments, the two ends of the third busbar are respectively connected to the side of the first busbar and the second busbar away from the electrode; The reinforcing member is disposed on the surface of the electrode and connected to the side of the first and second busbars closest to the electrode, or the reinforcing member is disposed on the surface of the third busbar furthest from the electrode. Disposing the reinforcing member on the surface of the electrode, forming a sandwich-like clamping structure with the third busbar, provides high mechanical strength, effectively increases the bonding area and mechanical stability of the overlapping region, and can very effectively resist stress generated during the lamination process. Furthermore, by placing the reinforcing member on the side of the third electrode furthest from the electrode, this covering connection simplifies the process.

[0011] In some embodiments, the membrane body includes an adjacent first membrane edge and a second membrane edge, wherein the first membrane edge and the second membrane edge intersect to form an angle; The two busbars are respectively located at the edge regions of the first and second membrane edges, with the overlap of the two busbars situated at the corner. The reinforcement is a contoured structure of the corner. Since the corner of the membrane is the area of ​​highest stress concentration and most prone to misalignment and separation at the overlap, the reinforcement perfectly matches the corner shape, completely covering and fitting the entire overlap area. The reinforcement tightly secures the overlap of the two busbars together, forming a unified structure and significantly enhancing structural strength. Compared to solutions requiring a third busbar, this eliminates a separate conductive component, simplifying the structure.

[0012] In some embodiments, the plurality of electrodes include a plurality of positive electrodes and a plurality of negative electrodes, wherein the plurality of positive electrodes and the plurality of negative electrodes are located at the outer edge of the membrane body; The current-combining assembly includes a first positive current-combining bar, a second positive current-combining bar, a first negative current-combining bar, and a second negative current-combining bar. The first positive current-combining bar and the second positive current-combining bar are connected to each other. The first positive current-combining bar and the second positive current-combining bar are located on one side of the membrane body and connected to multiple positive electrodes. The first negative current-combining bar and the second negative current-combining bar are located on the other side of the membrane body and connected to multiple negative electrodes. The reinforcement includes a first reinforcement and a second reinforcement. The first reinforcement covers the overlap between the first positive busbar and the second positive busbar, with both ends connected to the first and second positive busbars, respectively. The second reinforcement covers the overlap between the first negative busbar and the second negative busbar, with both ends connected to the first and second negative busbars, respectively. Thus, the positive and negative busbars are located on opposite sides of the membrane and reinforced by independent first and second reinforcements. This allows reinforcement measures to be applied simultaneously to all electrode circuits, ensuring consistent mechanical properties of the overall membrane structure. Each overlap point is independently reinforced, uniformly bearing subsequent process stresses while ensuring the reliability of the positive and negative circuit connections, avoiding overall functional loss due to the failure of a single circuit.

[0013] In some embodiments, the overlap positions of the first positive busbar and the second positive busbar are staggered from the overlap positions of the first negative busbar and the second negative busbar. By distributing the overlap points on both sides of the membrane, stress concentration at the same location on the membrane is avoided. This results in more uniform membrane thickness and mechanical properties in subsequent processes, reducing the possibility of encapsulation defects (such as bubbles or delamination) caused by localized excessive thickness or uneven strength, and improving the yield of the lamination process and the overall integrity of the finished product structure.

[0014] In some embodiments, the projections of the first and second reinforcement members in the thickness direction of the diaphragm body coincide or are staggered. Coincident projections indicate structural symmetry, with the positive and negative reinforcement members aligned vertically. During assembly, only one-time positioning and pressing is required from one direction, simplifying the alignment process. Staggered reinforcement members prevent excessive stress concentration along a single vertical line, distributing stress over a larger area and improving structural strength. Furthermore, staggered reinforcement members also help reduce the thickness at the diaphragm's edge locations.

[0015] In some embodiments, the membrane body includes an adjacent first membrane edge and a second membrane edge, wherein the first membrane edge and the second membrane edge intersect to form an angle; Two first positive electrode busbars are provided, one on each side of the first membrane edge and the other on the second membrane edge. The second positive electrode busbar is located at the corner. Both the second positive electrode busbar and the first reinforcement are contoured structures of the corner of the membrane body. The two ends of the second positive electrode busbar overlap with the two first positive electrode busbars respectively. One end of the first reinforcement covers the overlap between the second positive electrode busbar and one of the first positive electrode busbars, and the other end of the first reinforcement covers the overlap between the second positive electrode busbar and the other first positive electrode busbar. In some embodiments, two first negative electrode busbars are provided, one on the edge of the first membrane and the other on the other side of the edge of the second membrane. A second negative electrode busbar is located at the corner. Both the second negative electrode busbar and the second reinforcement are contoured structures of the corner. The two ends of the second negative electrode busbar overlap with the two first negative electrode busbars. One end of the second reinforcement covers the overlap between the second negative electrode busbar and one of the first negative electrode busbars, and the other end covers the overlap between the second negative electrode busbar and the other first negative electrode busbar. By providing dedicated contoured second positive electrode busbars and contoured second negative electrode busbars at the corner, the overlap is located on the membrane edge, avoiding significant stress concentration at the corner bend and preventing warping, tearing, or delamination during subsequent lamination. The uniform pressure applied by the reinforcement ensures that the overlap interface between the second positive electrode busbar and the two first positive electrode busbars (the second negative electrode busbar and the two first negative electrode busbars) always maintains a tight and stable contact.

[0016] Secondly, embodiments of this application provide a terminal product including the electrochromic film described in the first aspect, wherein the terminal product includes any one of a rearview mirror, curtain wall, car sunroof, car side window, car windshield, housing of electronic products, glasses, vehicle, and display panel.

[0017] The terminal product provided in this application includes the electrochromic film described in the first aspect, and therefore includes all the beneficial effects described in the first aspect. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the structure of the electrochromic film provided in the embodiments of this application. Figure 1 ; Figure 2 This is a schematic cross-sectional view of the electrochromic film provided in the embodiments of this application. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the electrochromic film provided in the embodiments of this application. Figure 2 ; Figure 4 This is a schematic cross-sectional view of the electrochromic film provided in the embodiments of this application. Figure 2 ; Figure 5 This is a schematic cross-sectional view of the electrochromic film provided in the embodiments of this application. Figure 3 ; Figure 6 This is a schematic diagram of the structure of the electrochromic film provided in the embodiments of this application. Figure 3 ; Figure 7 This is a schematic cross-sectional view of the electrochromic film provided in the embodiments of this application. Figure 4 ; Figure 8 This is a schematic diagram of the structure of the electrochromic film provided in the embodiments of this application. Figure 4 ; Figure 9 This is a schematic diagram of the overlap method of the busbars on both sides of the electrochromic diaphragm provided in the embodiments of this application. Figure 1 ; Figure 10 This is a schematic diagram of the overlap method of the busbars on both sides of the electrochromic diaphragm provided in the embodiments of this application. Figure 2 ; Figure 11 This is a schematic diagram of the structure of the electrochromic film provided in the embodiments of this application. Figure 5 ; Figure 12 This is a schematic cross-sectional view of the electrochromic film provided in the embodiments of this application. Figure 5 ; Figure 13 This is a schematic diagram of the structure of the electrochromic film provided in the embodiments of this application after the adhesive layer is applied.

[0020] The attached icon numbers are as follows: 10. Membrane body; 100. Electrode; 1000. Positive electrode; 1001. Negative electrode; 101. First membrane edge; 102. Second membrane edge; 103. Corner; 11. First substrate layer; 12. First conductive layer; 13. Second conductive layer; 14. Second substrate layer; 110. First groove; 140. Second groove; 20. Busbar; 21. First busbar; 22. Second busbar; 23. Third busbar; 24. First positive busbar; 25. Second positive busbar; 26. First negative busbar; 27. Second negative busbar; 30. Reinforcement component; 31. First reinforcement component; 32. Second reinforcement component; 40. Adhesive layer. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] In a first aspect, embodiments of this application provide an electrochromic film, such as Figure 1 and Figure 2 As shown, the electrochromic diaphragm includes a diaphragm body 10, a busbar assembly, and a reinforcement 30; Multiple electrodes are disposed on the diaphragm body 10; The busbar assembly includes at least two adjacent busbars 20. The two busbars 20 are located on the outer edge of the diaphragm body 10 and are connected to multiple electrodes with the same conduction polarity. The ends of the two busbars 20 overlap. The reinforcement member 30 covers the overlap of the two busbars 20, and both ends of the reinforcement member 30 are connected to the two busbars 20 respectively.

[0028] In the prior art, adjacent busbars 20 are directly connected by end overlap. However, during subsequent membrane turnover and lamination, displacement between adjacent busbars 20 may occur, leading to an open circuit in the electrochromic membrane. This application addresses this by adding a reinforcement 30 at the overlap of two busbars 20. The reinforcement 30 forms a unified structure with the overlap of the two busbars 20, which improves the structural strength of the busbar overlap. During glass lamination, the reinforcement 30 can withstand lamination pressure and environmental temperature changes, preventing loosening of the overlap and thus avoiding failure at the busbar overlap. This reduces the risk of membrane malfunction due to open circuits, improving product yield and lifespan.

[0029] In some embodiments, two adjacent busbars 20 are connected by conductive adhesive. The conductive adhesive between the busbars 20 not only ensures electrical conductivity but also further strengthens the overlap between them. In some embodiments, both ends of the reinforcement member 30 are connected to the two adjacent busbars 20 by conductive adhesive. The conductive adhesive at both ends of the reinforcement member 30 further firmly bonds the reinforcement member 30 to the busbars 20, forming a sandwich structure covering the overlap points, significantly enhancing the overlap strength between the busbars 20. This ensures a continuous and stable connection and conductive path from the busbars 20 to the reinforcement member 30. It effectively prevents interface loosening or displacement due to stress in subsequent processes, greatly reducing the risk of open circuits, thereby ensuring the long-term reliability of the electrochromic function.

[0030] In some embodiments, the reinforcement 30 is a conductive metal component. This provides an additional electrical parallel path on top of the mechanical reinforcement, greatly reducing the risk of circuit breakers and significantly improving the electrical redundancy and reliability of the system. Specifically, both the busbar 20 and the reinforcement 30 are copper foil. Copper is an excellent conductor with very low resistivity. As a busbar, it can efficiently collect and transmit current, ensuring uniform color change and rapid response of the electrochromic film. As the reinforcement 30, it is conductive with the busbar 20 and provides an additional parallel current path, further reducing the overall loop resistance and improving electrical performance. Furthermore, the reinforcement 30 can also be other conductive metal components, such as stainless steel, aluminum foil, nickel foil, nickel sheets, etc. The reinforcement 30 can also be other non-conductive components, such as polyethylene terephthalate film, polyimide film, etc.

[0031] In some embodiments, such as Figure 3 and Figure 4 As shown, the membrane body 10 includes an adjacent first membrane edge 101 and a second membrane edge 102, and the first membrane edge 101 and the second membrane edge 102 intersect to form a corner 103; The busbar assembly includes a first busbar 21, a second busbar 22, and a third busbar 23. The first busbar 21 is disposed on the first membrane edge 101, the second busbar 22 is disposed on the second membrane edge 102, and the third busbar 23 is disposed at the corner 103. The two ends of the third busbar 23 overlap with the first busbar 21 and the second busbar 22, respectively. The third busbar 23 and the reinforcement 30 are both contoured structures of the corner 103. One end of the reinforcing member 30 covers the overlap of the first busbar 21 and the third busbar 23, while the other end covers the overlap of the second busbar 22 and the third busbar 23. Thus, the third busbar 23, with its contoured structure at corner 103, acts as a dedicated corner connector, effectively improving stress distribution at corner 103 and preventing tearing or peeling at the overlap. The contoured reinforcing member 30 perfectly fits the shape of corner 103, simultaneously covering and securing the two overlap points of the three busbars (first busbar 21 and third busbar 23, second busbar 22 and third busbar 23) in one go. This makes the entire corner 103 area a high-strength, integrated structural unit, effectively resisting mechanical and thermal stresses from all directions and preventing any form of displacement or separation.

[0032] It should be noted that the third busbar 23 and the reinforcement 30 are both contoured structures of the corner 103, meaning that the external shape of the third busbar 23 and the reinforcement 30 is the same as that of the corner 103. That is, if the corner 103 is a right angle, an arc, etc., then the third busbar 23 and the reinforcement 30 are the corresponding shapes. This allows the third busbar 23 and the reinforcement 30 to fit the corner 103 of the membrane more closely.

[0033] In applications, such as Figure 4 The diagram shows a cross-sectional view of the diaphragm. The diaphragm body 10 includes a first base layer 11, a first conductive layer 12, an electrochromic layer (not shown), a second conductive layer 13, and a second base layer 14, which are stacked sequentially. A plurality of first grooves 110 are formed on one side of the edge region of the diaphragm body 10. The plurality of first grooves 110 penetrate the first base layer 11, the first conductive layer 12, and the electrochromic layer, exposing the second conductive layer 13 to form a plurality of first electrodes. A plurality of second grooves 140 are formed on the other side of the edge region of the diaphragm body 10. The plurality of second grooves 140 penetrate the second base layer 14, the second conductive layer 13, and the electrochromic layer, exposing the first conductive layer 12 to form a plurality of second electrodes. A busbar 20 connecting the plurality of first electrodes is provided on one side of the diaphragm body 10, and a busbar 20 connecting the plurality of second electrodes is provided on the other side of the diaphragm body 10. Specifically, if the first electrode is a positive electrode 1000 and the second electrode is a negative electrode 1001, then the busbar 20 connected to the first electrode is a positive busbar, and the busbar 20 connected to the second electrode is a negative busbar. Alternatively, if the first electrode is a negative electrode 1001 and the second electrode is a positive electrode 1000, then the busbar 20 connected to the first electrode is a negative busbar, and the busbar 20 connected to the second electrode is a positive busbar.

[0034] In some embodiments, such as Figure 4 As shown, the two ends of the third busbar 23 are connected to the side of the first busbar 21 and the second busbar 22 away from the electrode 100, respectively. The reinforcement 30 is disposed on the surface of the third busbar 23 away from the electrode 100. By disposing the reinforcement 30 on the side of the third busbar 23 away from the electrode 100, this overlay connection simplifies the process.

[0035] In some embodiments, such as Figure 5 As shown, the reinforcement 30 is disposed on the surface of the electrode 100, and the reinforcement 30 is connected to the side of the first busbar 21 and the second busbar 22 near the electrode 100. The reinforcement 30 is disposed on the surface of the electrode 100, forming a sandwich clamping structure with the third busbar 23. This structure has high mechanical strength, effectively increases the bonding area and mechanical stability of the overlapping area, and can very effectively resist the stress generated in the lamination process.

[0036] In some embodiments, such as Figure 6 and Figure 7 As shown, the membrane body 10 includes an adjacent first membrane edge 101 and a second membrane edge 102, and the first membrane edge 101 and the second membrane edge 102 intersect to form a corner 103; Two busbars 20 are respectively located at the edge areas of the first membrane edge 101 and the second membrane edge 102, and the overlap of the two busbars 20 is located at the corner 103. The reinforcement 30 is a contoured structure of the corner. Since the corner 103 of the membrane is the area with the most concentrated stress and is also the place where misalignment and separation of the overlap are most likely to occur, the reinforcement 30 perfectly matches the shape of the corner 103, completely covering and fitting the entire overlap area. The reinforcement tightly fixes the overlap of the two busbars 20 together, forming a whole, which greatly enhances the structural strength. Compared with the solution that requires a third busbar 23, a separate conductive component is eliminated, which helps to simplify the structure.

[0037] In some embodiments, such as Figure 8 and Figure 9 As shown, the plurality of electrodes 100 includes a plurality of positive electrodes 1000 and a plurality of negative electrodes 1001, which are located at the outer edge of the membrane body 10. The busbar assembly includes a first positive busbar 24, a second positive busbar 25, a first negative busbar 26, and a second negative busbar 27. The first positive busbar 24 and the second positive busbar 25 overlap, and the first negative busbar 26 and the second negative busbar 27 overlap. The first positive busbar 24 and the second positive busbar 25 are located on one side of the membrane body 10 in the thickness direction and are connected to conduct multiple positive electrodes 1000. The first negative busbar 26 and the second negative busbar 27 are located on the other side of the membrane body 10 in the thickness direction and are connected to conduct multiple negative electrodes 1001. The reinforcement member 30 includes a first reinforcement member 31 and a second reinforcement member 32. The first reinforcement member 31 covers the overlap of the first positive busbar 24 and the second positive busbar 25, and its two ends are connected to the first positive busbar 24 and the second positive busbar 25, respectively. The second reinforcement member 32 covers the overlap of the first negative busbar 26 and the second negative busbar 27, and its two ends are connected to the first negative busbar 26 and the second negative busbar 27, respectively. Thus, the positive and negative busbars are located on opposite sides of the membrane and are reinforced by independent first reinforcement members 31 and second reinforcement members 32. This allows the reinforcement measures to be applied simultaneously to all electrode circuits, ensuring consistent mechanical properties of the overall membrane structure. Each overlap point is independently reinforced, enabling it to withstand subsequent process stresses evenly, while ensuring the reliability of the positive and negative circuit connections and preventing overall functional loss due to the failure of a single circuit.

[0038] In some embodiments, such as Figure 10 As shown, the overlap positions of the first positive busbar 24 and the second positive busbar 25 are staggered from the overlap positions of the first negative busbar 26 and the second negative busbar 27. By distributing the overlap points on both sides of the membrane, stress concentration at the same location on the membrane is avoided. This results in more uniform membrane thickness and mechanical properties in subsequent processes, reducing the possibility of encapsulation defects (such as bubbles or delamination) caused by localized excessive thickness or uneven strength, and improving the yield of the lamination process and the overall integrity of the finished product structure.

[0039] In some embodiments, such as Figure 9 and Figure 10 As shown, the projections of the first reinforcement member 31 and the second reinforcement member 32 in the thickness direction of the diaphragm body 10 coincide or are offset. Figure 9 As shown, the overlapping projections indicate structural symmetry, with the positive and negative reinforcement components aligned vertically. During assembly, only one-time positioning and pressing from one direction is required, making the alignment operation relatively simple. Figure 10 As shown, the staggered arrangement of the reinforcement members 30 avoids excessive stress concentration on a single vertical line, which is more conducive to dispersing stress to a larger area and improving structural strength.

[0040] In some embodiments, such as Figure 11 and Figure 12 As shown, the membrane body 10 includes an adjacent first membrane edge 101 and a second membrane edge 102, and the first membrane edge 101 and the second membrane edge 102 intersect to form a corner 103; Two first positive busbars 24 are provided, and the two first positive busbars 24 are respectively provided on one side of the first membrane edge 101 and the second membrane edge 102. The second positive busbar 25 is provided at the corner 103. The second positive busbar 25 and the first reinforcement 31 are both contoured structures of the corner 103 of the membrane body 10. The two ends of the second positive busbar 25 overlap with the two first positive busbars 24 respectively. One end of the first reinforcement 31 covers the overlap between the second positive busbar 25 and one of the first positive busbars 24, and the other end of the first reinforcement 31 covers the overlap between the second positive busbar 25 and the other first positive busbar 24.

[0041] In some embodiments, such as Figure 11 and Figure 12 As shown, there are two first negative electrode busbars 26, which are respectively located on the other side of the first membrane edge 101 and the second membrane edge 102. A second negative electrode busbar 27 is located at the corner 103. Both the second negative electrode busbar 27 and the second reinforcement member 32 are contoured structures of the corner 103. The two ends of the second negative electrode busbar 27 overlap with the two first negative electrode busbars 26 respectively. One end of the second reinforcement member 32 covers the overlap between the second negative electrode busbar 27 and one of the first negative electrode busbars 26, and the other end of the second reinforcement member 32 covers the overlap between the second negative electrode busbar 27 and the other first negative electrode busbar 26. By setting dedicated contoured second positive electrode busbars 25 and 27 at the corner 103, the overlap is located on the membrane edge, avoiding significant stress concentration at the bend in the corner 103, thus preventing warping, tearing, or delamination during subsequent lamination. The uniform pressure applied by the reinforcement 30 ensures that the interface between the second positive busbar 25 and the two first positive busbars 24 (the second negative busbar 27 and the two first negative busbars 26) always maintains a tight and stable contact.

[0042] In some embodiments, such as Figure 13 As shown, the reinforcement 30 and busbar 20 are also covered with an adhesive layer 40. Thus, the adhesive layer 40 can limit and fix the busbar 20, thereby improving the stability of the connection between the busbar 20 and the electrode. Specifically, the adhesive layer 40 can further improve the stability of the busbar 20 at the edge of the electrochromic film. Moreover, the adhesive layer 40 forms an insulating barrier layer on the surface of the busbar, preventing polyvinyl butyral from entering the electrochromic film during subsequent lamination processes and causing side reactions with the electrochromic material layer. It also prevents external moisture, dust, or other conductive substances from entering the interior of the electrochromic film.

[0043] Secondly, embodiments of this application provide a terminal product including the electrochromic film described in the first aspect, wherein the terminal product includes any one of a rearview mirror, curtain wall, car sunroof, car side window, car windshield, housing of electronic products, glasses, vehicle, and display panel.

[0044] The terminal product provided in this application includes the electrochromic film described in the first aspect, and therefore includes all the beneficial effects described in the first aspect.

[0045] 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.

[0046] 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 in that, include: A diaphragm body, wherein multiple electrodes are disposed on the diaphragm body; A busbar assembly, the busbar assembly comprising at least two adjacent busbars, the two busbars being disposed at the outer edge of the diaphragm body and connected to a plurality of electrodes having the same conduction polarity, the ends of the two busbars being overlapped; The reinforcement member covers the overlap of the two busbars, and its two ends are respectively connected to the two busbars.

2. The electrochromic film as described in claim 1, characterized in that, Two adjacent busbars are connected by conductive adhesive; and / or, Both ends of the reinforcement are connected to two adjacent busbars via conductive adhesive.

3. The electrochromic film as described in claim 1, characterized in that, The reinforcement component is a metal conductive component.

4. The electrochromic film as described in claim 1, characterized in that, The membrane body includes an adjacent first membrane edge and a second membrane edge, and the first membrane edge and the second membrane edge intersect to form a corner; The busbar assembly includes a first busbar, a second busbar, and a third busbar. The first busbar is disposed on the edge of the first membrane, the second busbar is disposed on the edge of the second membrane, and the third busbar is disposed at the corner. The two ends of the third busbar overlap with the first busbar and the second busbar, respectively. Both the third busbar and the reinforcement are contoured structures of the corner. One end of the reinforcement covers the overlap of the first busbar and the third busbar, and the other end of the reinforcement covers the overlap of the second busbar and the third busbar.

5. The electrochromic film as described in claim 4, characterized in that, The two ends of the third busbar are respectively connected to the side of the first busbar and the second busbar away from the electrode; The reinforcement is disposed on the surface of the electrode and is connected to the side of the first busbar and the second busbar near the electrode, or the reinforcement is disposed on the surface of the third busbar away from the electrode.

6. The electrochromic film as described in claim 1, characterized in that, The membrane body includes an adjacent first membrane edge and a second membrane edge, and the first membrane edge and the second membrane edge intersect to form a corner; The two busbars are respectively located at the edge regions of the first membrane edge and the second membrane edge, and the overlap of the two busbars is located at the corner, and the reinforcement is a contour structure of the corner.

7. The electrochromic film as described in claim 1, characterized in that, The plurality of electrodes includes a plurality of positive electrodes and a plurality of negative electrodes, wherein the plurality of positive electrodes and the plurality of negative electrodes are located at the outer edge of the membrane body; The current-combining assembly includes a first positive current-combining bar, a second positive current-combining bar, a first negative current-combining bar, and a second negative current-combining bar. The first positive current-combining bar and the second positive current-combining bar are connected to each other. The first positive current-combining bar and the second positive current-combining bar are located on one side of the membrane body and connected to multiple positive electrodes. The first negative current-combining bar and the second negative current-combining bar are located on the other side of the membrane body and connected to multiple negative electrodes. The reinforcement includes a first reinforcement and a second reinforcement. The first reinforcement covers the overlap of the first positive busbar and the second positive busbar, and its two ends are respectively connected to the first positive busbar and the second positive busbar. The second reinforcement covers the overlap of the first negative busbar and the second negative busbar, and its two ends are respectively connected to the first negative busbar and the second negative busbar.

8. The electrochromic film as described in claim 7, characterized in that, The overlap positions of the first positive busbar and the second positive busbar are staggered from the overlap positions of the first negative busbar and the second negative busbar; and / or, The projections of the first reinforcement member and the second reinforcement member in the thickness direction of the diaphragm body coincide or are offset.

9. The electrochromic film as described in claim 7, characterized in that, The membrane body includes an adjacent first membrane edge and a second membrane edge, and the first membrane edge and the second membrane edge intersect to form a corner; Two first positive electrode busbars are provided, one on each side of the first membrane edge and the other on the second membrane edge. The second positive electrode busbar is located at the corner. Both the second positive electrode busbar and the first reinforcement are contoured structures of the corner of the membrane body. The two ends of the second positive electrode busbar overlap with the two first positive electrode busbars respectively. One end of the first reinforcement covers the overlap between the second positive electrode busbar and one of the first positive electrode busbars, and the other end of the first reinforcement covers the overlap between the second positive electrode busbar and the other first positive electrode busbar; and / or, Two first negative electrode busbars are provided, one on the side of the first membrane edge and the other on the side of the second membrane edge. The second negative electrode busbar is provided at the corner. Both the second negative electrode busbar and the second reinforcement are contoured structures of the corner. The two ends of the second negative electrode busbar overlap with the two first negative electrode busbars respectively. One end of the second reinforcement covers the overlap between the second negative electrode busbar and one of the first negative electrode busbars, and the other end of the second reinforcement covers the overlap between the second negative electrode busbar and the other first negative electrode busbar.

10. A terminal product, characterized in that, Includes the electrochromic film as described in any one of claims 1 to 9, wherein the end product includes any one of rearview mirrors, curtain walls, car sunroofs, car side windows, car windshields, housings of electronic products, eyeglasses, vehicles, and display panels.

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