Electrochromic diaphragm, electrochromic device and electrochromic product
By setting a rounded corner surface with a larger radius of curvature and an alternating groove confluence structure on the first side of the electrochromic diaphragm, the problem of stress concentration at the edge of the diaphragm is solved, and the stability and performance of the diaphragm on the curved surface structure are improved.
Patent Information
- Application Number
- CN202423322331.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-30
AI Technical Summary
When electrochromic films are bent and combined with curved structures, stress concentration is easily generated at the edges, leading to cracks and performance degradation.
The radius of curvature of the rounded surface on the first side of the electrochromic diaphragm is larger than that on the second side. By setting a larger radius of curvature on the first side, stress is dispersed and stress bearing capacity is improved. Alternating grooves and busbars are set at the edge of the diaphragm to form an alternating electrode structure.
It effectively reduces stress concentration, improves the structural strength and stress dispersion effect of the diaphragm edge, prevents crack formation, and ensures the stability and performance of the diaphragm under greater bending curvature.
Smart Images
Figure CN223757000U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electrochromic technology, and particularly provides an electrochromic film, an electrochromic device and an electrochromic product. BACKGROUND
[0002] In the prior art, an electrochromic film is often bent and attached to a curved structure to form an electrochromic product, such as a curved sunroof of a vehicle. In actual application, the middle position of the electrochromic film has a high arch, so that the edges of the electrochromic film have an arc edge with an arc. However, stress is generated in the process of bending and combining the electrochromic film with the curved structure, and the edges of the electrochromic film are often the key areas where stress is concentrated. When these edge areas are subjected to stress, the edges of the electrochromic film are prone to cracks, thereby affecting the performance of the electrochromic film. SUMMARY
[0003] The electrochromic device and the electrochromic product are provided to solve the problem that the edges of the electrochromic film are cracked and broken due to stress generated in the bending process of the electrochromic film in the prior art.
[0004] To achieve the above object, the technical scheme adopted by the present application is as follows:
[0005] In a first aspect, the present application provides an electrochromic film which can be bent. The electrochromic film comprises a first side edge and a second side edge, both of which are arc edges, and the curvature of the first side edge is greater than that of the second side edge. Grooves are provided on both the first side edge and the second side edge, and the grooves on the first side edge correspond to at least one first rounded surface. The grooves on the second side edge correspond to at least one second rounded surface. The curvature radius of at least one first rounded surface on the first side edge is greater than that of any second rounded surface on the second side edge.
[0006] The present application has the beneficial effect that the curvature radius of at least one first rounded surface on the first side edge is greater than that of any second rounded surface on the second side edge, i.e. the curvature radius of one or more or all first rounded surfaces on the first side edge is greater than that of the largest second rounded surface on the second side edge, so that the curvature radius of the first rounded surface on the first side edge is designed to be larger. This effectively improves the structural strength of the corresponding first rounded surface, enhances the stress dispersion effect of the first side edge, reduces stress concentration on the first side edge, and then the first side edge has a stronger stress bearing capacity relative to the second side edge to adapt to a larger bending arc.
[0007] In some embodiments, a middle portion of the first side edge has a first arc, and a middle portion of the second side edge has a second arc, wherein a curvature of the first arc is greater than a curvature of the second arc.
[0008] In some embodiments, a radius of curvature of at least one of the first rounded corners located on the first arc is configured to be greater than a radius of curvature of any of the first rounded corners located on the first side edge other than the first arc.
[0009] In some embodiments, a radius of curvature of at least one of the second rounded corners located on the second arc is configured to be greater than a radius of curvature of any of the second rounded corners located on the second side edge other than the second arc.
[0010] In some embodiments, the length of the first arc is 1 / 3-2 / 3 of the length of the first side edge.
[0011] In some embodiments, the length of the second arc is 1 / 3-2 / 3 of the length of the second side edge.
[0012] In some embodiments, the edge of the electrochromic film has two opposite first side edges and two opposite second side edges, the first side edge is adjacent to the second side edge, and the length of the first side edge is greater than the length of the second side edge.
[0013] In some embodiments, a radius of curvature of any of the first rounded corners on the first side edge is configured to be greater than a radius of curvature of each of the second rounded corners on the second side edge.
[0014] In some embodiments, the electrochromic film comprises a first conductive substrate layer, an electrochromic layer, and a second conductive substrate layer stacked in sequence, the groove penetrates the electrochromic layer in a thickness direction of the electrochromic film, and at least one of the first conductive substrate layer and the second conductive substrate layer.
[0015] In some embodiments, the groove comprises a first groove penetrating the first conductive substrate layer and the electrochromic layer in a stacking direction, and a second groove penetrating the second conductive substrate layer and the electrochromic layer in the stacking direction; the first groove and the second groove are arranged alternately along the first side edge and the second side edge.
[0016] In some embodiments, a spacing region is provided between adjacent first grooves and second grooves, a through groove is provided at the spacing region, the through groove connects adjacent first grooves and second grooves, and the first conductive substrate layer, the electrochromic layer, and the second conductive substrate layer penetrate the through groove.
[0017] In some embodiments, the interval region is formed with a protrusion separating the adjacent first groove and second groove, and the first conductive substrate layer, the electrochromic layer and the second conductive substrate layer are laminated at the protrusion.
[0018] In some embodiments, on the first side edge, the radii of curvature of the first and second fillets of the adjacent first groove and second groove are equal.
[0019] In some embodiments, on the second side edge, the radii of curvature of the first and second fillets of the adjacent first groove and second groove are equal.
[0020] In some embodiments, on the first side edge, the width of the first groove and the width of the second groove are W1, and in the corresponding interval region, the radius of curvature of each first fillet is equal to (1 / 2)*W1; on the second side edge, the width of the first groove and the width of the second groove are W2, and in the corresponding interval region, the radius of curvature of each second fillet is equal to (1 / 2)*W2; the length of W1 ranges from 4mm to 10mm, the length of W2 ranges from 4mm to 10mm, and W1>W2.
[0021] In a second aspect, the embodiments of the present application provide an electrochromic device, comprising the electrochromic film and a substrate, the substrate is arranged on the side of the first conductive substrate layer away from the electrochromic layer; and / or, the substrate is arranged on the side of the second conductive substrate layer away from the electrochromic layer; the electrochromic film is combined with the substrate and is curved into a curved shape.
[0022] In a third aspect, the embodiments of the present application provide an electrochromic product, comprising an electrochromic film or an electrochromic device, wherein the electrochromic product comprises a vehicle sunroof, the vehicle sunroof is arranged in a vehicle, and the length direction of the first side edge of the electrochromic film is consistent with the front-rear direction of the vehicle. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.
[0024] Figure 1 The top view structural schematic diagram of the electrochromic film provided by an embodiment of the present application;
[0025] Figure 2A partial structure schematic view of the first side edge and the second side edge of the electrochromic diaphragm provided by an embodiment of the present application;
[0026] Figure 3 A three-dimensional structure schematic view of the electrochromic diaphragm provided by an embodiment of the present application in a curved shape;
[0027] Figure 4 A cross-sectional structure schematic view of the electrochromic diaphragm provided by another embodiment of the present application in a stacking direction, wherein the interval area is provided with a through groove;
[0028] Figure 5 A cross-sectional structure schematic view of the electrochromic diaphragm provided by another embodiment of the present application in a stacking direction, wherein the interval area is provided with a convex part;
[0029] Figure 6 A cross-sectional structure schematic view of the interval area of the electrochromic diaphragm provided by an embodiment of the present application in a stacking direction, wherein the interval area is provided with a through groove;
[0030] Figure 7 A cross-sectional structure schematic view of the interval area of the electrochromic diaphragm provided by an embodiment of the present application in a stacking direction, wherein the interval area is provided with a convex part;
[0031] Figure 8 A comparison view of the cracks formed by the splitting phenomenon of the electrochromic diaphragm provided by another embodiment of the present application at the right-angle surface and the round-angle surface;
[0032] Figure 9 A partial structure schematic view of the first side edge of the electrochromic diaphragm provided by another embodiment of the present application;
[0033] Figure 10 A partial structure schematic view of the second side edge of the electrochromic diaphragm provided by another embodiment of the present application.
[0034] In the drawings,
[0035] 1000, electrochromic diaphragm;
[0036] 1100, first side edge; 1101, first arc-shaped part;
[0037] 1200, second side edge; 1201, second arc-shaped part;
[0038] 1300, arch height part;
[0039] 100, first conductive base layer; 110, first base layer; 120, first conductive layer;
[0040] 200, electrochromic layer;
[0041] 300, second conductive substrate layer; 310, second substrate layer; 320, second conductive layer;
[0042] 400, groove; 410, first groove; 420, second groove;
[0043] 411, first side; 421, second side; 412, third side; 422, fourth side;
[0044] 500, rounded surface; 510, first rounded surface; 520, second rounded surface;
[0045] 700, spacing area; 710, through slot; 720, protrusion;
[0046] 800, bus bar; 810, first bus bar; 820, second bus bar;
[0047] 900, insulating glue; 910, first insulating glue; 920, second insulating glue; 930, third insulating glue. DETAILED DESCRIPTION
[0048] Embodiments of the present application are described below in detail with reference to the accompanying drawings, in which like or similar elements are denoted by the same or similar reference signs, and examples of the embodiments are shown in the drawings. The embodiments described below are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application.
[0049] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0050] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.
[0051] In this application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", and "fixedly" mean to be connected, in a manner that can allow the coupling of components to be separated, or to be integrated, mechanically or electrically, directly or indirectly, or to be communicated internally, or to be interacted with each other. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0052] In this application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.
[0053] In the current technology, it is often necessary to bend and fit the electrochromic film to a curved structure to form an electrochromic product, for example, on the curved sunroof of a car, etc. The middle of the electrochromic film is arched, resulting in the edges of the electrochromic film having an arc. However, the electrochromic film will generate stress during the bending and combining process with the curved structure, and the edges of the electrochromic film often become the key area of stress concentration. When these edge areas are subjected to stress, the conductive layer in the electrochromic film is prone to local overloading stress, which is prone to cause cracks, thereby affecting the performance of the conductive layer and affecting the normal color changing effect of the electrochromic film.
[0054] Therefore, in order to solve the above problems, the present application designs an electrochromic film, the curvature radius of at least one first fillet surface on the first side is greater than the maximum curvature radius of the second fillet surface on the second side, so as to focus on designing the curvature radius of the first fillet surface on the first side to be larger, effectively improving the structural strength of the first fillet, improving the stress dispersion effect of the first side, reducing the stress concentration on the first side, and then the first side has stronger stress bearing capacity relative to the second side to adapt to larger bending radius.
[0055] Reference Figures 1 to 5The first aspect of this application provides an electrochromic film 1000, which can be bent to fit onto a curved structure. Specifically, the electrochromic film 1000 can be bent into a curved shape or into an irregular shape. The electrochromic film 1000 includes a first side 1100 and a second side 1200, both of which are arc-shaped, with the arc of the first side 1100 being greater than that of the second side 1200. Multiple [unclear symbols] are provided on both the first side 1100 and the second side 1200. Figure 2 The groove 400 shown corresponds to at least one groove 400 on the first side 1100. Figure 2 The first rounded corner surface 510 shown; the groove 400 on the second side 1200 corresponds to at least one such as Figure 2 The second rounded surface 520 shown; the radius of curvature of one or more first rounded surfaces 510 on the first side 1100 is greater than the radius of curvature of any second rounded surface 520 on the second side 1200.
[0056] Specifically, refer to Figure 4 and Figure 5 The electrochromic film 1000 includes a first conductive substrate layer 100, an electrochromic layer 200, and a second conductive substrate layer 300 stacked sequentially. A groove 400 penetrates the electrochromic layer 200 and at least one of the first conductive substrate layer 100 and the second conductive substrate layer 300. In the stacking direction of the first conductive substrate layer 100, the electrochromic layer 200, and the second conductive substrate layer 300, the overlapping area of the first conductive substrate layer 100 and the second conductive substrate layer 300 covers the electrochromic layer 200, preventing the electrochromic layer 200 from being exposed outside the electrochromic film 1000 and effectively protecting the electrochromic layer 200. The electrochromic layer 200 is made of an electrochromic material and can undergo a stable and reversible color change under the action of an applied electric field; a color-changing region is formed within the electrochromic layer 200.
[0057] In the embodiments of this application, the edge of the electrochromic film 1000 is provided with a plurality of grooves 400, which can be formed by etching or laser engraving processes. The grooves 400 include a first groove 410 that penetrates the first conductive substrate layer 100 and the electrochromic layer 200 along the stacking direction of the electrochromic film 1000; and a second groove 420 that penetrates the second conductive substrate layer 300 and the electrochromic layer 200 along the stacking direction.
[0058] The electrochromic layer 200 is a sheet composed of one or more layers of gel-state or solid materials, such as polymer-dispersed liquid crystal (PDLC) layers, suspended particle devices (SPD) layers, and electrochromic (EC) layers. For an electrochromic (EC) type electrochromic layer 200, it may include a color-changing material layer, an electrolyte layer, and an ion storage layer stacked sequentially. The materials of the color-changing material layer, electrolyte layer, and ion storage layer can be those found in the prior art, and this application does not impose any special limitations on them.
[0059] In some embodiments, both the first conductive substrate layer 100 and the second conductive substrate layer 300 have good conductivity and light transmittance. Each of the first conductive substrate layer 100 and the second conductive substrate layer 300 includes a transparent substrate layer and a conductive layer disposed on the surface of the substrate layer. Specifically, the first conductive substrate layer 100 includes a first substrate layer 110 and a first conductive layer 120, with the first substrate layer 110 disposed on the side away from the electrochromic layer 200 and the first conductive layer 120 disposed on the side closer to the electrochromic layer 200; the second conductive substrate layer 300 includes a second substrate layer 310 and a second conductive layer 320, with the second substrate layer 310 disposed on the side away from the electrochromic layer 200 and the second conductive layer 320 disposed on the side closer to the electrochromic layer 200.
[0060] For example, the substrate layer can be flexible and may be made of materials such as polyethylene terephthalate (PET) or polycarbonate (PC); the substrate layer may also be a glass substrate layer. The conductive layer is configured as one or more of indium tin oxide (ITO), aluminum zinc oxide (AZO), and fluorine-doped tin oxide (FTO); wherein, the conductive layer is preferably configured as ITO.
[0061] In the embodiments of this application, the edge of the electrochromic film 1000 is provided with a plurality of grooves 400, which can be formed by etching or laser engraving processes. The grooves 400 include a first groove 410 that penetrates the first conductive substrate layer 100 and the electrochromic layer 200 along the stacking direction of the electrochromic film 1000; and a second groove 420 that penetrates the second conductive substrate layer 300 and the electrochromic layer 200 along the stacking direction.
[0062] Among them, reference Figures 1 to 5A plurality of first grooves 410 and second grooves 420 are arranged alternately on the edge of the electrochromic film 1000, that is, a plurality of first grooves 410 and second grooves 420 are arranged alternately on the first side edge 1100 and the second side edge 1200 respectively. In this embodiment, at least one first groove 410 and at least one second groove 420 are formed on the first side edge 1100, and at least one first groove 410 and at least one second groove 420 are formed on the second side edge 1200.
[0063] The number of the first grooves 410 and the second grooves 420 is a plurality, which can be any number greater than two, and can be set according to actual conditions. Specifically, a plurality of first grooves 410 are arranged alternately on the edge of the electrochromic film 1000, and each first groove 410 is located on the side of the second conductive layer 320 away from the second substrate layer 310. It should be noted that the first grooves 410 are formed on the first substrate layer 110, the first conductive layer 120 and the electrochromic layer 200 by etching or laser engraving.
[0064] Meanwhile, a plurality of second grooves 420 are arranged alternately on the edge of the electrochromic film 1000, and each second groove 420 is located on the side of the first conductive layer 120 away from the first substrate layer 110. It should be noted that the second grooves 420 are formed on the second substrate layer 310, the second conductive layer 320 and the electrochromic layer 200 by etching or laser engraving.
[0065] Further, referring to Figure 6 and Figure 7 , the electrochromic film 1000 is provided with bus bars 800 on both sides in the thickness direction, and the bus bar 800 on one side is at least partially electrically connected to the second conductive layer 320 through a plurality of first grooves 410; the bus bar 800 on the other side is at least partially electrically connected to the first conductive layer 120 through a plurality of second grooves 420. Exemplarily, the bus bar 800 can include but is not limited to conductive copper foil, conductive glue and conductive resin and other conductive materials, so that a multi-electrode structure can be formed on the edge of the electrochromic film 1000, and the color changing speed of the electrochromic film 1000 can be accelerated.
[0066] It can be understood that by alternately arranging the first grooves 410 and the second grooves 420 on the edge of the electrochromic film 1000, an alternating electrode structure is formed, and the bus bars 800 are connected at the first grooves 410 and the second grooves 420 respectively, and the positive and negative electrodes of the external power supply are connected through the bus bars 800 respectively, and an electrical conduction is formed with the external power supply; since the first grooves 410 and the second grooves 420 are arranged alternately, the color changing speed of the electrochromic film 1000 is effectively improved.
[0067] Referring to Figures 1 to 3 ,Figure 8 Any one of the grooves 400 forms a plurality of rounded surfaces 500 in the orthographic projection on the plane where the electrochromic layer 200 is located. Specifically, the groove 400 has a side connecting between the inner side and the outer side of the edge of the electrochromic diaphragm 1000, and the inner and outer ends of the side are respectively connected with the rounded surfaces 500. Understandably, when the groove 400 at the edge of the electrochromic diaphragm 1000 is subjected to pressure, each rounded surface 500 can effectively disperse the pressure, reduce the stress concentration of the groove 400 at the rounded surface 500, improve the structural strength at the rounded surface 500, reduce the number and size of cracks, and reduce the risk of fracture of the conductive substrate layer.
[0068] Specifically, referring to Figure 2 The rounded surface 500 includes a first rounded surface 510 in the groove 400 on the first side edge 1100, that is, the first side edge 1100 has a plurality of first rounded surfaces 510 in the first groove 410 and the second groove 420. The rounded surface 500 also includes a second rounded surface 520 in the groove 400 on the second side edge 1200, that is, the second side edge 1200 has a plurality of second rounded surfaces 520 in the first groove 410 and the second groove 420.
[0069] Referring to Figure 3 The first side edge 1100 has a larger bending degree, that is, the curvature of the first side edge 1100 is greater than that of the second side edge 1200. The edge profile of the electrochromic diaphragm 1000 has a plurality of side edges, and the first side edge 1100 and the second side edge 1200 are any two side edges of the edge of the electrochromic diaphragm 1000. The first side edge 1100 can be adjacent to the second side edge 1200, and the first side edge 1100 can also be non-adjacent to the second side edge 1200.
[0070] The curvature radius of the at least one first rounded corner 510 on the first side 1100 is set to be greater than the curvature radius of any second rounded corner 520 on the second side 1200, i.e. the curvature radius of one or more or all of the first rounded corners 510 on the first side 1100 is greater than the curvature radius of the largest second rounded corner 520 on the second side 1200, so as to emphasize the design of the curvature radius of the first rounded corner 510 on the first side 1100 to be larger. Understandably, since the curvature of the first side 1100 is greater than the curvature of the second side 1200, in turn, the electrochromic film 1000 in the bending and combining process with the curved structure, the first side 1100 will be subjected to greater stress relative to the second side 1200. By setting the curvature radius of one or more first rounded corners 510 to be greater than the curvature radius of the largest second rounded corner 520, the structural strength of the corresponding first rounded corner 510 is effectively improved, the stress dispersion effect of the first side 1100 is improved, the stress concentration on the first side 1100 is reduced, and in turn, the first side 1100 has a stronger stress bearing capacity relative to the second side 1200 to adapt to a larger bending curvature.
[0071] Reference Figure 1 and Figure 3 In some embodiments, the middle part of the first side 1100 has a first arc-shaped part 1101, and the middle part of the second side 1200 has a second arc-shaped part 1201, and the curvature of the first arc-shaped part 1101 is greater than the curvature of the second arc-shaped part 1201.
[0072] In some embodiments, the electrochromic film 1000 is bent into a curved shape so that the middle part of the electrochromic film 1000 forms a high arch part 1300, i.e. the middle part of the electrochromic film 1000 is the highest, and gradually bends in the direction from the middle part to the periphery; in another embodiment, the middle part of the electrochromic film 1000 can also be a planar structure, and part or the entire periphery is bent into a curved structure.
[0073] For example, the edge profile of the electrochromic film 1000 is rectangular, the first side 1100 and the second side 1200 are two adjacent sides, and the electrochromic film 1000 is bent from a planar shape Figure 1 into a curved shape Figure 3 , the center of the electrochromic film 1000 is arched to form a high arch part 1300, and the first side 1100 and the second side 1200 of the edge of the electrochromic film 1000 are both curved into arc edges.
[0074] In the embodiments of the present application, after the electrochromic diaphragm 1000 is bent and combined with the curved structure, the bending degree of the first side edge 1100 is greater than that of the second side edge 1200, so that the curvature of the first side edge 1100 is greater than that of the second side edge 1200, and then the curvature of the first arc-shaped portion 1101 is greater than that of the second arc-shaped portion 1201.
[0075] In some embodiments, the curvature radius of at least one of the first rounded surfaces 510 located on the first arc-shaped portion 1101 is configured to be greater than the curvature radius of any of the first rounded surfaces 510 at a position of the first side edge 1100 other than the first arc-shaped portion 1101.
[0076] It can be understood that the first side edge 1100 is bent into an arc edge, and the bending degree of the first arc-shaped portion 1101 at the middle position is the greatest, and the stress is more easily concentrated on the first arc-shaped portion 1101; therefore, the curvature radius of one or more of the first rounded surfaces 510 located on the first arc-shaped portion 1101 is increased, so that the curvature radius is greater than the curvature radius of any of the first rounded surfaces 510 at a position of the first side edge 1100 other than the first arc-shaped portion 1101, thereby increasing the structural strength of the first arc-shaped portion 1101 and improving the stress dispersion effect; avoiding the case that the first arc-shaped portion 1101 bears too much stress, further reducing the risk of increasing the number of cracks in the conductive base layer caused by stress concentration of the first arc-shaped portion 1101, and effectively improving the structural stability.
[0077] In some embodiments, the curvature radius of at least one of the second rounded surfaces 520 located on the second arc-shaped portion 1201 is configured to be greater than the curvature radius of any of the second rounded surfaces 520 at a position of the second side edge 1200 other than the second arc-shaped portion 1201.
[0078] It can be understood that after the second side edge 1200 is bent into an arc edge, the bending degree of the second arc-shaped portion 1201 at the middle position is the greatest, and the stress is easily concentrated on the second arc-shaped portion 1201; therefore, the curvature radius of one or more of the second rounded surfaces 520 located on the second arc-shaped portion 1201 is increased, so that the curvature radius is greater than the curvature radius of any of the second rounded surfaces 520 at a position of the second side edge 1200 other than the second arc-shaped portion 1201, thereby increasing the structural strength of the second arc-shaped portion 1201 and improving the stress dispersion effect; avoiding the case that the second arc-shaped portion 1201 bears too much stress, further reducing the risk of increasing the number of cracks in the conductive base layer caused by stress concentration of the second arc-shaped portion 1201, and effectively improving the structural stability.
[0079] In some embodiments, the length of the first arc-shaped portion 1101 is 1 / 3-2 / 3 of the length of the first side edge 1100. Specifically, the length of the first side edge 1100 is the arc length after the first side edge 1100 is arc-shaped.
[0080] In yet some embodiments, the length of the second arc-shaped portion 1201 is 1 / 3-2 / 3 of the length of the second side edge 1200. Specifically, the length of the second side edge 1200 is the arc length after the second side edge 1100 is arc-shaped.
[0081] Reference Figures 1 to 3 In some embodiments, the edge of the electrochromic film 1000 has two opposite first side edges 1100 and two opposite second side edges 1200, the first side edge 1100 is adjacent to the second side edge 1200; and the length of the first side edge 1100 is greater than the length of the second side edge.
[0082] Specifically, the electrochromic film 1000 is rectangular, the first side edge 1100 and the second side edge 1200 are two adjacent side edges, the first side edge 1100 is the long side edge, and the second side edge is the short side edge. In the embodiments of the present application, after the electrochromic film 1000 is bent in combination with the curved structure, the bending curvature of the long side edge first side edge 1100 is greater than that of the short side edge second side edge 1200.
[0083] Illustratively, the electrochromic film 1000 of the present application is particularly applied to a vehicle sunroof, the vehicle sunroof is in a curved shape with a middle arch, the length of the vehicle sunroof in the front-rear direction is greater than that in the left-right direction, and the bending degree in the front-rear direction is greater; the electrochromic film 1000 is applied to the vehicle sunroof, and the first side edge 1100 is arranged in the front-rear direction of the vehicle, so in the embodiments of the present application, the first side edge 1100 is longer than the second side edge 1200, and the radius of curvature of the first rounded surface 510 on the first side edge 1100 is designed to be larger, so that the first side edge 1100 has better stress dispersion to cope with greater bending.
[0084] In some embodiments, the radius of curvature of any first rounded surface 510 on the first side edge 1100 is configured to be greater than the radius of curvature of each second rounded surface 520 on the second side edge 1200.
[0085] Further, the radius of curvature of any first rounded face 510 on the first side edge 1100 is greater than the radius of curvature of any second rounded face 520 on the second side edge 1200, so that the radius of curvature of the first rounded face 510 can be increased to a greater extent, the structural strength of each first rounded face 510 on the first side edge 1100 is increased to a greater extent, the stress dispersion effect of the first side edge 1100 is improved, and the stress concentration phenomenon is effectively avoided. Therefore, the first side edge 1100 can be bent to a greater extent relative to the second side edge 1200, and the structure is stable.
[0086] Reference Figures 4 to 7 In some embodiments, the electrochromic film 1000 includes a first conductive substrate layer 100, an electrochromic layer 200, and a second conductive substrate layer 300 arranged in sequence, the groove 400 penetrates the electrochromic layer 200 in the thickness direction of the electrochromic film 1000, and at least one of the first conductive substrate layer 100 and the second conductive substrate layer 300.
[0087] Specifically, the groove 400 includes a first groove 410 that penetrates the first conductive substrate layer 100 and the electrochromic layer 200 in the stacking direction of the electrochromic film 1000, and a second groove 420 that penetrates the second conductive substrate layer 300 and the electrochromic layer 200 in the stacking direction; the first groove 410 and the second groove 420 are alternately arranged on the first side edge 1100 and the second side edge 1200, and a spacing region 700 is provided between adjacent first grooves 410 and second grooves 420.
[0088] In some embodiments, referring to Figure 4 and Figure 6 , a spacing region 700 is provided between adjacent first grooves 410 and second grooves 420, and a through groove 710 is provided at the spacing region 700. Specifically, in the stacking direction of the electrochromic film 1000, the spacing region between adjacent first grooves 410 and second grooves 420 forms a through groove 710 in a through structure, the through groove 710 connects adjacent first grooves 410 and second grooves 420, and the first conductive substrate layer 100, the electrochromic layer 200, and the second conductive substrate layer 300 penetrate the through groove.
[0089] In the embodiment, a plurality of through grooves 710 are arranged at the edge of the electrochromic film 1000, the depth of the through grooves 710 is greater than the depth of the first grooves 410 and the second grooves 420, and the through grooves 710 penetrate the first base layer 110, the first conductive layer 120, the electrochromic layer 200, the second conductive layer 320 and the second base layer 310 along the stacking direction of the electrochromic film 1000. At this time, the through grooves 710 penetrate the electrochromic film thickness at the edge of the electrochromic film 1000, and the two ends of the through grooves 710 are respectively communicated with the adjacent first grooves 410 and second grooves 420. The number of the through grooves 710 can be two or any number of values, which can be set according to the actual situation.
[0090] It can be understood that in the embodiment, the thickness of the electrochromic film 1000 at the position of the through groove 710 is small, so that the pressure received by the electrochromic film 1000 corresponding to the through groove 710 is also relatively small at the first groove 410 and the second groove 420. In addition, since the through groove 710 does not have the electrochromic layer 200, the electrolyte in the electrochromic layer 200 will not be precipitated to form a conductor to connect the first conductive layer 120 and the second conductive layer 320, that is, there is no material to be connected and short-circuited, which can effectively prevent the chemical short circuit of the electrochromic film 1000 edge under pressure, solve the problem of local short circuit of the electrochromic film 1000 under pressure, and ensure the stability of the device.
[0091] In other embodiments, referring to Figure 5 and Figure 7 , a spacing area 700 is arranged between the adjacent first grooves 410 and the second grooves 420, and a convex portion 720 is arranged at the spacing area 700. Specifically, along the stacking direction of the electrochromic film 1000, the convex portion 720 in a convex structure is formed at the spacing area between the adjacent and alternating first grooves 410 and the second grooves 420, the convex portion 720 separates the adjacent first grooves 410 and the second grooves 420, and the first conductive base layer 100, the electrochromic layer 200 and the second conductive base layer 300 are stacked at the convex portion 720.
[0092] In the above embodiments of the present application, at the edge of the electrochromic film 1000, the spacing area between the adjacent first grooves 410 and the second grooves 420 includes the through groove 710 in a through structure and / or the convex portion 720 in a convex structure.
[0093] Referring to Figure 1The first groove 410 and the second groove 420 are arranged along the edges of the electrochromic film 1000, and the length of the direction along which they are arranged is the length of the first groove 410 and the second groove 420. In other words, the length direction of the first groove 410 on any side of the electrochromic film 1000 corresponds to the length direction of the side of the electrochromic film 1000, and the length of the second groove 420 on any side of the electrochromic film 1000 corresponds to the length direction of the side of the electrochromic film 1000. In this embodiment, the length direction of the first groove 410 and the second groove 420 on the first side edge 1100 is consistent with the length direction of the first side edge 1100, and the length direction of the first groove 410 and the second groove 420 on the second side edge 1200 is consistent with the length direction of the second side edge 1200.
[0094] Specifically, referring to Figure 9 and Figure 10 , the first groove 410 is formed by etching or laser engraving and the like along the stacking direction of the electrochromic film 1000 through the first conductive substrate layer 100 and the electrochromic layer 200, and the side of the first groove 410 close to the spacing area 700 has a side edge connecting between the inner side and the outer side of the edge of the electrochromic film 1000. The second groove 420 is formed by etching or laser engraving and the like along the stacking direction of the electrochromic film 1000 through the second conductive substrate layer 300 and the electrochromic layer 200, and the side of the second groove 420 close to the spacing area 700 has a side edge connecting between the inner side and the outer side of the edge of the electrochromic film 1000. The side edge of the first groove 410 intersects the length direction of the first groove 410, and the side edge of the second groove 420 intersects the length direction of the second groove 420.
[0095] In some embodiments, referring to Figure 9 and Figure 10 , the first groove 410 and the second groove 420 are arranged along the length direction of the first side edge 1100 and the second side edge 1200, and the spacing area 700 between the first groove 410 and the second groove 420 is provided with a through groove 710, and the first conductive substrate layer 100, the electrochromic layer 200 and the second conductive substrate layer 300 pass through the through groove 710; the side edge of the first groove 410 close to the through groove 710 is the first edge 411, and the side edge of the second groove 420 close to the through groove 710 is the second edge 421. The two ends of the first edge 411 and the two ends of the second edge 421 are connected with the rounded surface 500.
[0096] Exemplarily, on the orthographic projection of the plane where the electrochromic layer 200 is located, the part of the first edge 411 close to the inner side of the electrochromic diaphragm 1000 is connected to the part of the second edge 421 close to the inner side of the electrochromic diaphragm 1000, which can be intersected at a point or connected to the same inner edge of the electrochromic diaphragm 1000; thus, the interval area 700 will form a semi-open area, and the open port of the area is towards the outer side of the electrochromic diaphragm 1000.
[0097] In other embodiments, referring to Figure 9 and Figure 10 , the first groove 410 and the second groove 420 are arranged along the length direction of the first side edge 1100 and the second side edge 1200, and the convex part 720 is arranged at the interval area 700 between the first groove 410 and the second groove 420, and the first conductive substrate layer 100, the electrochromic layer 200 and the second conductive substrate layer 300 are stacked at the convex part 720. The side edge of the first groove 410 close to the convex part 720 is the third edge 412, and the side edge of the second groove 420 close to the convex part 720 is the fourth edge 422. The two ends of the third edge 412 and the two ends of the fourth edge 422 are connected with the rounded face 500.
[0098] Exemplarily, on the orthographic projection of the plane where the electrochromic layer 200 is located, the part of the third edge 412 close to the outer side of the electrochromic diaphragm 1000 is connected to the part of the fourth edge 422 close to the outer side of the electrochromic diaphragm 1000, which can be intersected at a point or connected to the same outer edge of the electrochromic diaphragm 1000; thus, the interval area 700 will form a semi-open area, and the open port of the area is towards the inner side of the electrochromic diaphragm 1000.
[0099] Referring to Figure 2 and Figure 9 , in some embodiments, on the first side edge 1100, the curvature radius of each first rounded face 510 in any interval area 700 is equal.
[0100] Specifically, on the first side edge 1100, in an interval area 700 provided with a through groove 710, the curvature radius of the four first rounded faces 510 in the through groove 710 is equal, the stress received at the interval area 700 can be evenly dispersed to the four first rounded faces 510, the stress dispersion effect is better, the structural stability is better, and the product reliability is effectively improved.
[0101] Referring to Figure 9 , in an embodiment, on the first side edge 1100, the width of the first groove 410 and the width of the second groove 420 are both W1, and in the corresponding interval area 700, the curvature radius of each first rounded face 510 is equal to (1 / 2)*W1.
[0102] Specifically, the width direction of the first groove 410 is perpendicular to the length direction of the first side edge 1100, the width direction of the second groove 420 is perpendicular to the length direction of the first side edge 1100, and the widths of the first groove 410 and the second groove 420 on both sides of the same interval region 700 are equal, so that the structure has good symmetry and the stress is uniformly dispersed.
[0103] For example, on the first side edge 1100, the tangent lines of the two first rounded surfaces 510 adjacent to each other on the same side edge of the groove 400 are tangent to the corresponding interval region 700, and the width direction of the interval region 700 is perpendicular to the length direction of the first side edge 1100.
[0104] Therefore, under the premise that the radii of curvature of the two first rounded surfaces 510 adjacent to each other are equal, the edge lines of the two first rounded surfaces 510 are tangent to each other in the orthographic projection on the plane where the electrochromic layer 200 is located, so that the stress on the side edge of the first rounded surface 510 can be dispersed to the two first rounded surfaces 510 adjacent to each other on both sides, respectively, thereby improving the stress dispersion effect.
[0105] Further, in any interval region 700 of the first side edge 1100, the radii of curvature of the four first rounded surfaces 510 are equal, and the widths of the first groove 410 and the second groove 420 are both W1; the tangent lines of the two first rounded surfaces 510 adjacent to each other are parallel to the central axis of the interval region 700, that is, the interval region 700 has an axisymmetric structure, which is more conducive to uniform dispersion of stress.
[0106] Reference Figure 2 and Figure 10 In some embodiments, on the second side edge 1200, the radii of curvature of each second rounded surface 520 in any interval region 700 are equal.
[0107] Specifically, on the second side edge 1200, in an interval region 700 provided with a through groove 710, the radii of curvature of the four second rounded surfaces 520 in the through groove 710 are equal, the stress at the interval region 700 can be uniformly dispersed to the four second rounded surfaces 520, the stress dispersion effect is better, the structural stability is better, and the product reliability is effectively improved.
[0108] Reference Figure 10 In an embodiment, on the second side edge 1200, the width of the first groove 410 and the width of the second groove 420 are both W2, and in the corresponding interval region 700, the radius of curvature of each second rounded surface 520 is equal to (1 / 2)*W2.
[0109] Specifically, the width direction of the first groove 410 is perpendicular to the length direction of the second side 1200, the width direction of the second groove 420 is perpendicular to the length direction of the second side 1200, and the widths of the first groove 410 and the second groove 420 on both sides of the same interval region 700 are equal, so that the structure has good symmetry and the stress is uniformly dispersed.
[0110] For example, on the second side 1200, the two second rounded surfaces 520 adjacent to each other on each groove 400 are tangent to each other, and the tangent line is parallel to the width direction of the corresponding interval region 700, and the width direction of the interval region 700 is perpendicular to the length direction of the second side 1200.
[0111] Therefore, under the premise that the curvatures of the two adjacent second rounded surfaces 520 are equal, the edge lines of the two adjacent second rounded surfaces 520 are tangent to each other in the orthographic projection on the plane where the electrochromic layer 200 is located, so that the stress on the side of the second rounded surface 520 can be dispersed to the two adjacent second rounded surfaces 520 on both sides, respectively, thereby improving the stress dispersion effect.
[0112] Further, in any interval region 700 of the second side 1200, the curvatures of the four second rounded surfaces 520 are equal, and the widths of the first groove 410 and the second groove 420 are both W2; the tangent lines of the two adjacent second rounded surfaces 520 are parallel to the central axis of the interval region 700, that is, the interval region 700 has an axisymmetric structure, which is more conducive to uniform stress dispersion.
[0113] In the above embodiments, W1>W2. Understandably, the width of the groove 400 on the first side 1100 is W1, and the width of the groove 400 on the second side 1200 is W2; since the first side 1100 needs to bear more stress than the second side 1200, W1 is set to be greater than W2, the width of the first groove 410 is increased, and then the curvature radius of the first rounded surface 510 in each groove 400 on the first side 1100 can be set to be larger, which greatly improves the structural strength of the first rounded surface 510 and further improves the stress dispersion effect, so that the first side 1100 can still maintain structural stability when bearing more stress, effectively reducing the number and size of cracks on the first side 1100, and improving the structural reliability.
[0114] In some embodiments, the length of W1 ranges from 4 mm to 10 mm; specifically, the length of W1 can be in any length range of 4 mm-5 mm, 5 mm-6 mm, 6 mm-7 mm, 7 mm-8 mm, 8 mm-9 mm, 9 mm-10 mm.
[0115] In some embodiments, the length of W2 ranges from 4mm to 10mm. Specifically, the length of W2 can be in any length range of 4mm to 5mm, 5mm to 6mm, 6mm to 7mm, 7mm to 8mm, 8mm to 9mm, 9mm to 10mm.
[0116] Further, with continued reference to Figure 6 and Figure 7 In some embodiments, the electrochromic film 1000 can further include an insulating adhesive 900, which includes a first insulating adhesive 910 and a second insulating adhesive 920. The first insulating adhesive 910 can be disposed on the first substrate layer 110 and located on the side of the first substrate layer 110 away from the electrochromic layer 200, and the second insulating adhesive 920 can be disposed on the second substrate layer 310 and located on the side of the second substrate layer 310 away from the electrochromic layer 200. Thus, the insulating adhesive 900 can be stably bonded to the substrate layer.
[0117] In some embodiments, the first insulating adhesive 910 can at least partially cover the first groove 410, and the second insulating adhesive 920 can at least partially cover the second groove 420. Thus, a part of the insulating adhesive is bonded to the substrate layer, and a part of the insulating adhesive is bonded to the exposed conductive layer at the groove site, which can form a reinforcing effect on the concave edge, preventing the concave edge from falling off between layers and the like.
[0118] In other embodiments, the first insulating adhesive 910 at least partially covers the first bus bar 810 and at least partially covers the first groove 410, and the second insulating adhesive 920 at least partially covers the second bus bar 820 and at least partially covers the second groove 420. Thus, by covering the insulating adhesive to the bus bar, the interlayer bonding force of the device can be improved.
[0119] With reference to Figure 6 In some embodiments, the insulating adhesive 900 further includes a third insulating adhesive 930, a part of which is bonded to the first substrate layer 110, and a part of which is bonded to the second conductive layer 320 exposed in the first groove 410; the first bus bar 810 at least partially covers the third insulating adhesive 930; the third insulating adhesive 930 is used to isolate the first bus bar 810 and the second bus bar 820 at the through groove 710, preventing the first bus bar 810 and the second bus bar 820 at the through groove 710 from forming a conduction path and thus causing a short circuit, thereby improving product reliability.
[0120] In some embodiments, the insulating glue 900 further comprises a third insulating glue 930, a portion of the third insulating glue 930 is bonded to the second substrate layer 310, and a portion of the third insulating glue 930 is bonded to the first conductive layer 120 exposed in the second groove 420; the second bus bar 820 at least partially covers the third insulating glue 930; the third insulating glue 930 is used to isolate the first bus bar 810 and the second bus bar 820 at the through groove 710, prevent the first bus bar 810 and the second bus bar 820 at the through groove 710 from forming a conduction path and causing a short circuit, and improve the reliability of the product.
[0121] The second aspect of the embodiments of the present application provides an electrochromic device (not shown), comprising a substrate and an electrochromic diaphragm 1000, the substrate is arranged on the side of the first conductive substrate layer 100 away from the electrochromic layer 200; and / or, the substrate is arranged on the side of the second conductive substrate layer 300 away from the electrochromic layer 200; the electrochromic diaphragm 1000 is combined with the substrate and is curved into a curved shape, so that the middle part of the electrochromic diaphragm 1000 forms an arch.
[0122] Specifically, the substrate is arranged on both sides of the electrochromic diaphragm 1000 in the thickness direction, and the substrate has light transmittance, preferably glass.
[0123] Exemplarily, the substrate is curved glass, and the electrochromic diaphragm 1000 is combined with the substrate and fixed in a curved shape.
[0124] It can be understood that the electrochromic device has the functions and beneficial effects of the electrochromic diaphragm 1000 in any of the above embodiments, which will not be repeated here.
[0125] The third aspect of the embodiments of the present application provides an electrochromic product, comprising the above-mentioned electrochromic diaphragm 1000 or electrochromic device. The electrochromic product comprises a vehicle sunroof, the vehicle sunroof is arranged in a vehicle, and the length direction of the first side edge 1100 of the electrochromic diaphragm 1000 is consistent with the front-rear direction of the vehicle.
[0126] It can be understood that the roof of the vehicle is in a curved shape with an arch in the middle, and the electrochromic diaphragm 1000 is in a curved shape matching the curved structure of the roof. The bending degree of the vehicle sunroof in the front-rear direction is larger than that in the left-right direction, and the first side edge 1100 has a stronger stress bearing capacity than the second side edge 1200 to adapt to a larger bending radius, so that the length direction of the first side edge 1100 is consistent with the front-rear direction of the vehicle, and the structural reliability of the vehicle sunroof is ensured.
[0127] The above merely provides preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, and improvement made in the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. An electrochromic flap, which is capable of being bent; characterized in that, The electrochromic diaphragm comprises: a first side edge and a second side edge, both of which are arc edges, and the curvature of the first side edge is greater than that of the second side edge; a plurality of grooves are arranged on both the first side edge and the second side edge, the grooves on the first side edge correspond to at least one first rounded surface, and the grooves on the second side edge correspond to at least one second rounded surface; wherein the radius of curvature of at least one first rounded surface on the first side edge is greater than that of any second rounded surface on the second side edge.
2. The electrochromic louver of claim 1, wherein, The middle part of the first side edge has a first arc-shaped part, and the middle part of the second side edge has a second arc-shaped part, the curvature of the first arc-shaped part is greater than that of the second arc-shaped part.
3. The electrochromic louver of claim 2, wherein, The radius of curvature of at least one first rounded surface located on the first arc-shaped part is configured to be greater than that of any first rounded surface on the first side edge at a position other than the first arc-shaped part; and / or, The radius of curvature of at least one second rounded surface located on the second arc-shaped part is greater than that of any second rounded surface on the second side edge at a position other than the second arc-shaped part.
4. The electrochromic louver of claim 2 or 3, wherein, The length of the first arc-shaped part is 1 / 3-2 / 3 of the length of the first side edge, and / or, The length of the second arc-shaped part is 1 / 3-2 / 3 of the length of the second side edge.
5. The electrochromic louver of claim 2, wherein, The edge of the electrochromic diaphragm has two opposite first side edges and two opposite second side edges, the first side edge is adjacent to the second side edge, and the length of the first side edge is greater than that of the second side edge.
6. The electrochromic louver of claim 5, wherein, The radius of curvature of any first rounded surface on the first side edge is greater than that of each second rounded surface on the second side edge.
7. The electrochromic louver of claim 1, wherein, The electrochromic diaphragm comprises a first conductive substrate layer, an electrochromic layer and a second conductive substrate layer which are sequentially stacked, the grooves penetrate the electrochromic layer in the thickness direction of the electrochromic diaphragm, and at least one of the first conductive substrate layer and the second conductive substrate layer.
8. The electrochromic louver of claim 7, wherein, The grooves comprise first grooves penetrating the first conductive substrate layer and the electrochromic layer in the stacking direction, and second grooves penetrating the second conductive substrate layer and the electrochromic layer in the stacking direction; the first grooves and the second grooves are alternately arranged along the first side edge and the second side edge.
9. The electrochromic louver of claim 8, wherein, A spacing area is arranged between adjacent first grooves and second grooves; A through groove is arranged at the spacing area, the through groove connects adjacent first grooves and second grooves, and the first conductive substrate layer, the electrochromic layer and the second conductive substrate layer penetrate the through groove; and / or, The spacing area forms a protrusion, the protrusion separates adjacent first grooves and second grooves, and the first conductive substrate layer, the electrochromic layer and the second conductive substrate layer are stacked at the protrusion.
10. The electrochromic louver of claim 8, wherein, The radius of curvature of the first rounded surface of adjacent first grooves and second grooves on the first side edge is equal; and / or, On the second side, the radius of curvature of the second fillet surface of the first groove and the second groove adjacent to each other is equal.
11. The electrochromic louver of claim 9, wherein, The width of the first groove and the width of the second groove on the first side are both W1, in the corresponding interval, the radius of curvature of each first fillet surface is equal to (1 / 2)*W1, the width of the first groove and the width of the second groove on the second side are both W2, in the corresponding interval, the radius of curvature of each second fillet surface is equal to (1 / 2)*W2, the length of W1 ranges from 4mm to 10mm, the length of W2 ranges from 4mm to 10mm, and W1>W2.
12. An electrochromic device, characterized in that, The electrochromic film as claimed in any one of claims 1-11, wherein the electrochromic film is combined with a substrate and is curved into a curved shape.
13. An electrochromic product characterized in that, The electrochromic film as claimed in any one of claims 1-11 or the electrochromic film device as claimed in claim 12, wherein the electrochromic product comprises a vehicle sunroof, the vehicle sunroof is arranged in a vehicle, and the length direction of the first side of the electrochromic film is consistent with the front-rear direction of the vehicle.