An electrochromic device

Abstract

The utility model discloses an electrochromic device includes first base layer, first conductive layer, electrochromic film layer, second conductive layer and second base layer, the upside and downside of the edge of device are provided with first bus electrode and second bus electrode respectively, first bus electrode includes first corner bus bar and first strip bus bar, and second bus electrode includes second corner bus bar and second strip bus bar, and first corner bus bar and second corner bus bar are arranged at the corner of device respectively, and first strip bus bar and second strip bus bar are arranged along the edge of device respectively, and two first strip bus bars of adjacent are connected through a first corner bus bar, and two second strip bus bars of adjacent are connected through a second corner bus bar. Advantage is can realize the even discoloration of large area device, effectively reduces drive voltage, provides the convenience for the wiring of bus electrode, promotes the stability and reliability of device, avoids the glass breakage problem caused by the uneven height.

Description

Technical Field

[0001] This utility model belongs to the field of electrochromic technology, and specifically relates to an electrochromic device. Background Technology

[0002] Electrochromic devices utilize an external electric field to induce reversible and stable coloring and fading cycles in the electrochromic layer. Typically, bus electrodes are arranged at the edges of two transparent conductive substrates on the upper and lower sides of the electrochromic film. These bus electrodes are then electrically connected to an external power source via lead-out electrodes, thereby establishing a potential difference across the electrochromic layer and driving its color to change with voltage.

[0003] However, with the increasing demand for larger device areas or irregular shapes, the traditional "single-sided / double-sided" busbar method has revealed several problems. First, the size of the busbar electrode is usually difficult to match the diaphragm contour, and there are very few custom sizes that are "integrated" with the diaphragm contour. In addition, large-area devices are often accompanied by irregular or curved corner designs, which further increases the difficulty of size adaptation. Second, in the traditional busbar setting method, the four corners of the diaphragm are far from the busbar, the electric field strength is weak, the current density is low, and phenomena such as "corner hysteresis" and "halo" are prone to occur. This problem is particularly obvious in large-area devices. In addition, the wiring is complicated when the segmented electrode is connected to the external power supply, which brings inconvenience to automated production. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an electrochromic device that can achieve uniform color change of large-area devices, effectively reduce driving voltage, facilitate the wiring of bus electrodes during production and processing, improve the stability and reliability of the device, and effectively avoid glass breakage caused by uneven height.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an electrochromic device, which includes a first substrate layer, a first conductive layer, an electrochromic film layer, a second conductive layer, and a second substrate layer stacked sequentially from top to bottom. A first bus electrode and a second bus electrode are respectively disposed on the upper and lower sides of the edge of the electrochromic device. The first bus electrode is electrically connected to the second conductive layer, and the second bus electrode is electrically connected to the first conductive layer. The first bus electrode includes a first corner bus bar and a first strip bus bar. The second bus electrode includes a second corner bus bar and a second strip bus bar. The first corner bus bar and the second corner bus bar are respectively disposed at the corners of the electrochromic device. The first strip bus bar and the second strip bus bar are respectively disposed along the edge of the electrochromic device. Two adjacent first strip bus bars are connected by a first corner bus bar, and two adjacent second strip bus bars are connected by a second corner bus bar.

[0006] Preferably, the upper edge of the second conductive layer is provided with a plurality of first grooves at intervals, and the lower edge of the first conductive layer is provided with a plurality of second grooves at intervals. The first grooves and second grooves are arranged overlapping along the edge of the electrochromic device. A portion of the first strip-shaped busbar is embedded in at least one first groove and electrically connected to the second conductive layer. A portion of the second strip-shaped busbar is embedded in at least one second groove and electrically connected to the first conductive layer. Each corner of the electrochromic device is provided with a first groove or a second groove. The first busbar electrode and the second busbar electrode are respectively electrically connected to an external power supply via lead-out electrodes.

[0007] Preferably, both ends of each first corner busbar overlap with the ends of two adjacent first busbars, and both ends of each second corner busbar overlap with the ends of two adjacent second busbars. This overlapping method simplifies the wiring process and facilitates alignment and assembly in automated production. The overlapping structure forms a continuous and low-resistance current path, ensuring smooth current transmission at the device corners and guaranteeing the color-changing effect at the device corners.

[0008] As a further preferred embodiment, the orthographic projections of the overlapping positions on the upper and lower sides of the same corner of the electrochromic device overlap. This arrangement simplifies process alignment and dimensional adaptation, and forms a support area with uniform thickness and symmetrical structure at the corner of the device, thus achieving reliable support for the glass.

[0009] As a further preferred embodiment, the orthographic projections of the overlapping positions on the upper and lower sides at the same corner of the electrochromic device are staggered. This arrangement can homogenize the overall thickness distribution of the electrode area and prevent the glass from breaking due to excessive thickness at a certain position during the lamination process.

[0010] As a further preferred option, the overlap length at each joint is 5 to 50 mm.

[0011] Preferably, the first corner busbar includes two first connecting strips at a certain angle, and the second corner busbar includes two second connecting strips at a certain angle. The two first connecting strips overlap with the ends of two adjacent first strip busbars, and the two second connecting strips overlap with the ends of two adjacent second strip busbars.

[0012] As a further preferred embodiment, the included angle between the two first connecting strips is 45~165°, and the included angle between the two second connecting strips is 45~165°.

[0013] As a further preferred embodiment, each of the first connecting strips is integrally formed with one of the first strip-shaped busbars, and each of the second connecting strips is integrally formed with one of the second strip-shaped busbars. Two adjacent first strip-shaped busbars overlap at the corner of the electrochromic device, and two adjacent second strip-shaped busbars overlap at the corner of the electrochromic device. This design avoids the difficulties and internal stress problems associated with integrally bending large-sized corner busbars. Furthermore, the overlapping process is easier to control than overall bending, which helps improve production efficiency and process stability.

[0014] As a further preferred embodiment, the overlap length of two adjacent first strip-shaped busbars is 3-5 mm, and the overlap length of two adjacent second strip-shaped busbars is 3-5 mm.

[0015] Preferably, two adjacent first strip-shaped busbars and a first corner busbar connecting the two adjacent first strip-shaped busbars are integrally formed and bent at the corner of the electrochromic device. Similarly, two adjacent second strip-shaped busbars and a second corner busbar connecting the two adjacent second strip-shaped busbars are integrally formed and bent at the corner of the electrochromic device. This design eliminates contact resistance caused by overlap at the corner, ensuring efficient and stable current transmission at the corner, improving the uniformity of color change in the device, and reducing the driving voltage. Furthermore, the integrated structure has higher mechanical strength, avoids potential failure risks at the overlap, reduces the number of parts and assembly steps, and is more conducive to automated production.

[0016] Preferably, the first corner busbar and the first strip busbar located on the upper side of the edge of the electrochromic device are integrally formed into a loop, and the second corner busbar and the second strip busbar located on the lower side of the edge of the electrochromic device are integrally formed into a loop.

[0017] Preferably, the widths of the first bus electrode and the second bus electrode are 3 to 5 mm, respectively.

[0018] Compared with existing technologies, this invention has the following advantages: By setting corner busbars at the corners of the electrochromic device, this invention can achieve uniform color change in large-area devices and effectively reduce the driving voltage. It also facilitates the wiring of the busbar electrodes during production and processing, improving the stability and reliability of the device. Furthermore, the corner busbars act as a buffer during the lamination process, uniformly distributing electrode height differences and effectively preventing glass breakage due to uneven height. Attached Figure Description

[0019] Figure 1 This is a top view of the electrochromic device in Example 1; Figure 2 Enlarged Figure 1 AA section diagram; Figure 3 Enlarged Figure 1 Middle BB section view; Figure 4 To and Figure 1 A cross-sectional view of the electrochromic device in Example 2 at the same position as AA in the middle; Figure 5 To and Figure 1 A cross-sectional view of the electrochromic device in Example 3 at the same position as AA in the middle; Figure 6 To and Figure 1 A cross-sectional view of the electrochromic device in Example 4 at the same position as AA in the middle; Figure 7 This is a top view of the electrochromic device in Example 5; Figure 8 Enlarged Figure 7 C-section view; Figure 9 This is a top view of the electrochromic device in Example 6; Figure 10 Enlarged Figure 9 DD cross-section diagram; Figure 11 This is a top view of the electrochromic device in Example 7; Figure 12 Enlarged Figure 11 EE cross-section diagram; The specific reference numerals in the figure are as follows: 1-First base layer, 2-First conductive layer, 21-Second groove, 3-Electrochromic film layer, 4-Second conductive layer, 41-First groove, 5-Second base layer, 6-Lead electrode, 71-First corner busbar, 72-First strip busbar, 73-First connecting strip, 81-Second corner busbar, 82-Second strip busbar, 83-Second connecting strip, 9-Notch, 91-First insulating layer, 92-Second insulating layer. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Components or structures not limited in this invention employ conventional techniques in the art.

[0021] In this invention, the term "corner" should be interpreted broadly, referring to the structural area formed in a component to achieve connection and transition between different parts. This term is not limited to intersecting structures at a specific geometric angle; its specific forms include, but are not limited to, arc-shaped transitions, chamfers, bevels, curved connections, or any other geometric construction capable of achieving continuous or discontinuous changes in direction or contour.

[0022] In this invention, the term "strip" refers to a component whose scale in a single dimension is significantly larger than the scales in the other two dimensions. The macroscopic geometric contour of the component can be a strictly straight line or a curve with arcs or undulating waves, as long as it meets the aforementioned length-to-width ratio characteristics, it falls within the definition of "strip".

[0023] In this invention, the electrochromic device is not limited to conventional square or rectangular shapes, but may also include polygonal or irregularly shaped devices. The curvature of the corner area is not limited to 90°, but can be any angle.

[0024] The electrochromic device of Example 1, such as Figures 1-3 As shown, the electrochromic device is quadrilateral in shape. It comprises, from top to bottom, a first substrate layer 1, a first conductive layer 2, an electrochromic film layer 3, a second conductive layer 4, and a second substrate layer 5, stacked sequentially. A first bus electrode with a width of 3-5 mm and a second conductive layer with a width of 3-5 mm are respectively disposed on the upper and lower sides of the edge of the electrochromic device. The second bus electrode is mm in diameter. The first bus electrode is electrically connected to the second conductive layer 4 and the second bus electrode is electrically connected to the first conductive layer 2. The first bus electrode includes a first corner bus bar 71 and a first strip bus bar 72. The second bus electrode includes a second corner bus bar 81 and a second strip bus bar 82. The first corner bus bar 71 and the second corner bus bar 81 are respectively disposed at the corners of the electrochromic device. The first strip bus bar 72 and the second strip bus bar 82 are respectively disposed along the edge of the electrochromic device. Two adjacent first strip bus bars 72 are connected by a first corner bus bar 71, and two adjacent second strip bus bars 82 are connected by a second corner bus bar 81.

[0025] In Embodiment 1, the first corner busbar 71 is stacked at the corner of the first base layer 1, the first strip busbar 72 is electrically connected to the second conductive layer 4, the second corner busbar 81 is stacked at the corner of the first conductive layer 2, and the second strip busbar 82 is electrically connected to the first conductive layer 2. Specifically, the first corner busbar 71 includes two first connecting bars 73 with an included angle of 90°, and the second corner busbar 81 includes two second connecting bars 83 with an included angle of 90°. The two first connecting bars 73 overlap with the ends of two adjacent first strip busbars 72, that is, a part of each first connecting bar 73 overlaps at the corner of the first base layer 1, and the other part overlaps on the upper surface of the end of the first strip busbar 72. The two second connecting bars 83 overlap with the ends of two adjacent second strip busbars 82, that is, a part of each second connecting bar 83 overlaps at the corner of the first conductive layer 2, and the other part overlaps on the lower surface of the end of the second strip busbar 82.

[0026] In Example 1, the orthographic projections of the overlapping positions on the upper and lower sides of the same corner of the electrochromic device overlap, and the overlap length of each overlapping position is 5~50 mm.

[0027] In Embodiment 1, a plurality of first grooves 41 are spaced apart on the upper edge of the second conductive layer 4, and a plurality of second grooves 21 are spaced apart on the lower edge of the first conductive layer 2. The first grooves 41 and the second grooves 21 overlap along the edge of the electrochromic device. A notch 9 is provided between adjacent first grooves 41 and second grooves 21. The upper and lower sides of the notch 9 are covered by a first insulating layer 91 and a second insulating layer 92, respectively. The two sides of the first insulating layer 91 are respectively laid on the surfaces of the first base layer 1 and the second conductive layer 4. The first conductive layer 2 and the second base layer 5 are respectively attached to the two sides of the 92. A portion of the first strip busbar 72 is embedded in at least one first groove 41 and electrically connected to the second conductive layer 4. A portion of the second strip busbar 82 is embedded in at least one second groove 21 and electrically connected to the first conductive layer 2. A first groove 41 is provided on the upper side of each corner of the electrochromic device, and a second groove 21 is provided on the lower side of each corner of the electrochromic device. The first busbar electrode and the second busbar electrode are respectively electrically connected to an external power supply via lead-out electrodes 6. The electrochromic device of Example 2 differs from that of Example 1 in that, in Example 2, as... Figure 4 As shown, the first corner busbar 71 is disposed on the first base layer 1 at the corner of the electrochromic device, and the end of each first strip busbar 72 overlaps the upper surface of a first connecting strip 73. The second corner busbar 81 is disposed on the first conductive layer 2 at the corner of the electrochromic device, and the end of each second strip busbar 82 overlaps the lower surface of a second connecting strip 83.

[0028] The electrochromic device of Example 3 differs from that of Example 1 in that, in Example 3, as... Figure 5 As shown, the orthographic projections of the overlapping positions on the upper and lower sides at the same corner of the electrochromic device are staggered.

[0029] The electrochromic device of Example 4 differs from that of Example 2 in that, in Example 4, as... Figure 6 As shown, the orthographic projections of the overlapping positions on the upper and lower sides at the same corner of the electrochromic device are staggered.

[0030] The electrochromic device of Example 5 differs from that of Example 1 in that, in Example 5, as... Figures 7-8As shown, each first connecting strip 73 is integrally formed with a first strip-shaped busbar 72, and each second connecting strip 83 is integrally formed with a second strip-shaped busbar 82. Two adjacent first strip-shaped busbars 72 overlap at the corner of the electrochromic device, with an overlap length of 3~5 mm; two adjacent second strip-shaped busbars 82 overlap at the corner of the electrochromic device, with an overlap length of 3~5 mm.

[0031] The electrochromic device of Example 6 differs from that of Example 1 in that, in Example 6, as... Figures 9-10 As shown, two adjacent first strip busbars 72 and a first corner busbar 71 connecting the two adjacent first strip busbars 72 are integrally formed and bent at the corner of the electrochromic device. Two adjacent second strip busbars 82 and a second corner busbar 81 connecting the two adjacent second strip busbars 82 are integrally formed and bent at the corner of the electrochromic device.

[0032] The electrochromic device of Example 7 differs from that of Example 1 in that, in Example 7, as... Figures 11-12 As shown, the first corner busbar 71 and the first strip busbar 72 located on the upper side of the edge of the electrochromic device are integrally formed into a circuit, and the second corner busbar 81 and the second strip busbar 82 located on the lower side of the edge of the electrochromic device are integrally formed into a circuit.

Claims

1. An electrochromic device, comprising, from top to bottom, a first substrate layer, a first conductive layer, an electrochromic film layer, a second conductive layer, and a second substrate layer, wherein a first bus electrode and a second bus electrode are respectively disposed on the upper and lower sides of the edge of the electrochromic device, the first bus electrode being electrically connected to the second conductive layer, and the second bus electrode being electrically connected to the first conductive layer, characterized in that, The first bus electrode includes a first corner bus bar and a first strip bus bar, and the second bus electrode includes a second corner bus bar and a second strip bus bar. The first corner bus bar and the second corner bus bar are respectively disposed at the corners of the electrochromic device. The first strip bus bar and the second strip bus bar are respectively disposed along the edge of the electrochromic device. Two adjacent first strip bus bars are connected by one first corner bus bar, and two adjacent second strip bus bars are connected by one second corner bus bar.

2. The electrochromic device according to claim 1, characterized in that, The upper edge of the second conductive layer is provided with a plurality of first grooves at intervals, and the lower edge of the first conductive layer is provided with a plurality of second grooves at intervals. The first grooves and second grooves are arranged overlapping along the edge of the electrochromic device. A portion of the first strip-shaped busbar is embedded in at least one first groove and electrically connected to the second conductive layer. A portion of the second strip-shaped busbar is embedded in at least one second groove and electrically connected to the first conductive layer. A first groove or a second groove is provided at each corner of the electrochromic device.

3. The electrochromic device according to claim 1, characterized in that, Each of the first corner busbars has its two ends overlapped with the ends of two adjacent first busbars, and each of the second corner busbars has its two ends overlapped with the ends of two adjacent second busbars.

4. The electrochromic device according to claim 3, characterized in that, The orthographic projections of the overlapping positions of the upper and lower sides at the same corner of the electrochromic device overlap.

5. The electrochromic device according to claim 3, characterized in that, The orthographic projections of the overlapping positions on the upper and lower sides of the same corner of the electrochromic device are staggered.

6. An electrochromic device according to claim 3, characterized in that, The overlap length at each joint is 5~50 mm.

7. The electrochromic device according to claim 1, characterized in that, The first corner busbar includes two first connecting strips at a certain angle, and the second corner busbar includes two second connecting strips at a certain angle. The two first connecting strips overlap with the ends of two adjacent first strip busbars, and the two second connecting strips overlap with the ends of two adjacent second strip busbars.

8. The electrochromic device according to claim 7, characterized in that, The included angle between the two first connecting strips is 45° to 165°, and the included angle between the two second connecting strips is 45° to 165°.

9. The electrochromic device according to claim 7, characterized in that, Each of the first connecting strips is integrally formed with one of the first strip-shaped busbars, and each of the second connecting strips is integrally formed with one of the second strip-shaped busbars. Two adjacent first strip-shaped busbars overlap at the corner of the electrochromic device, and two adjacent second strip-shaped busbars overlap at the corner of the electrochromic device.

10. An electrochromic device according to claim 9, characterized in that, The overlap length of two adjacent first-strip busbars is 3-5 mm, and the overlap length of two adjacent second-strip busbars is 3-5 mm.

11. The electrochromic device according to claim 1, characterized in that, Two adjacent first strip-shaped busbars and a first corner busbar connecting the two adjacent first strip-shaped busbars are integrally formed and bent at the corner of the electrochromic device. Two adjacent second strip-shaped busbars and a second corner busbar connecting the two adjacent second strip-shaped busbars are integrally formed and bent at the corner of the electrochromic device.

12. The electrochromic device according to claim 1, characterized in that, The first corner busbar and the first strip busbar located on the upper side of the edge of the electrochromic device are integrally formed into a loop, and the second corner busbar and the second strip busbar located on the lower side of the edge of the electrochromic device are integrally formed into a loop.

13. An electrochromic device according to claim 1, characterized in that, The widths of the first bus electrode and the second bus electrode are 3 to 5 mm, respectively.

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