Electrochromic device and electrochromic device

Abstract

The utility model relates to the technical field of electrochromism, and provides an electrochromism device and an electrochromism device.The electrochromism device comprises a first conductive substrate layer, an electrochromism layer and a second conductive substrate layer which are sequentially stacked; a plurality of grooves are formed in the edge of the electrochromic device, inner corners and outer corners are formed on orthographic projections of the grooves on the plane where the electrochromic layer is located, and the inner corners and the outer corners are arranged to be round corners; the fillet radius of at least one outer corner is larger than the fillet radius of the adjacent inner corner in the same groove; the size of the fillet radius of the outer corner is designed to be larger than the size of the fillet radius of the adjacent inner corner, the number and size of cracks of the electrochromic device at the outer corner are reduced to a greater extent, the risk of cracking of the conductive substrate layer in the groove is reduced, and then the adverse effect on the conductivity between the bus bar and the conductive layer is reduced.

Description

Technical Field

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

[0002] Electrochromic technology is a technique that causes electrochromic materials to change color or fade under the influence of an external voltage. Devices containing electrochromic materials are called electrochromic devices. Typically, an external power source is required to power the electrochromic device, driving it to change color or fade, thus exhibiting a change in light transmittance. In recent years, electrochromic devices have been widely used in architectural windows, automotive glass, display devices, mobile terminals, and other fields, showing promising market application prospects.

[0003] In existing technologies, electrochromic devices typically have busbars on their conductive substrate layer. These busbars are usually made of highly conductive materials (such as silver paste or copper wire). These conductive materials are used to conduct electricity to the conductive substrate layer, causing the electrochromic device to change color. However, the manufacturing process of electrochromic devices requires high-pressure pressing. During this pressing process, the conductivity between the busbars and the conductive substrate layer is affected by the pressure, thus affecting the normal color-changing effect of the electrochromic device. Summary of the Invention

[0004] The purpose of this application is to provide an electrochromic device and an electrochromic apparatus, which aims to solve the problem that existing electrochromic devices develop cracks at the edges during high-voltage pressing operations, affecting the performance of the conductive substrate layer and thus the conductivity between the busbar and the conductive substrate layer.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide an electrochromic device, comprising a first conductive substrate layer, an electrochromic layer, and a second conductive substrate layer stacked sequentially.

[0007] The electrochromic device has a plurality of grooves along its edge. Each groove penetrates the electrochromic layer along the stacking direction of the electrochromic device and penetrates at least one of the first conductive substrate layer and the second conductive substrate layer. The grooves form an inner angle and an outer angle on the orthographic projection of the plane containing the electrochromic layer. The inner angle and the outer angle are located on the inner and outer sides of the edge of the electrochromic device, respectively, and both the inner angle and the outer angle are rounded. The radius of at least one outer angle is set to be larger than the radius of the adjacent inner angle in the same groove.

[0008] The beneficial effects of this application are that, by setting the inner and outer corners as rounded corners, when the groove at the edge of the electrochromic device is subjected to pressure, the rounded corners, compared to right angles, can effectively disperse the pressure, reduce stress concentration at the inner and outer corners, improve the structural strength at the inner and outer corners, reduce the number and size of cracks, and lower the risk of fracture of the conductive substrate layer. Furthermore, designing the radius of the outer corner of the groove to be larger than the radius of the adjacent inner corner results in higher structural strength at the outer corner, further reducing the number and size of cracks at the outer corner of the electrochromic device, lowering the risk of cracking of the conductive substrate layer within the groove, and thus reducing the adverse effects on the conductivity between the busbar and the conductive layer, improving product reliability.

[0009] In some embodiments, the electrochromic device has a busbar at its edge; the busbar is at least partially located in the groove and forms an electrical connection with the first conductive substrate layer.

[0010] In some embodiments, the busbar is at least partially located in the groove and forms an electrical connection with the second conductive substrate layer.

[0011] By adopting the above technical solution, the electrochromic device is made conductive through the first and second busbars, thereby achieving rapid color change of the electrochromic device.

[0012] In some embodiments, the groove includes a first groove penetrating the first conductive substrate layer and the electrochromic layer along the stacking direction, and a second groove penetrating the second conductive substrate layer and the electrochromic layer along the stacking direction; the first groove and the second groove are alternately arranged along the edge of the electrochromic device.

[0013] By adopting the above technical solution, the second busbar and the first busbar are connected to the first groove and the second groove respectively to form an alternating electrode structure. The positive and negative terminals of the external power supply are connected through each electrode structure to form an electrical connection with the external power supply.

[0014] In some embodiments, the first groove has a first interior angle and a first exterior angle in the orthographic projection of the plane where the electrochromic layer is located, and the second groove has a second interior angle and a second exterior angle in the orthographic projection of the plane where the electrochromic layer is located; the radius of the first interior angle is R1, the radius of the second interior angle is R2, the radius of the first exterior angle is R3, and the radius of the second exterior angle is R4.

[0015] In some embodiments, at least one of the first outer angles, R3, is greater than the adjacent first inner angle, R1.

[0016] By adopting the above technical solution, R3 of the first outer corner is greater than R1 of the first inner corner, so that the structural strength of the first groove at the first outer corner is greater than that at the first inner corner. This reduces the number and size of cracks on the second conductive layer exposed in the second conductive substrate layer in the first groove, and makes the local resistance of the second conductive layer affected by cracks change less. This reduces the impact on the conductivity between the first busbar and the second conductive layer, and satisfies the normal color-changing effect of the electrochromic device.

[0017] In some embodiments, at least one of the second outer angles, R4, is greater than the adjacent second inner angle, R2.

[0018] By adopting the above technical solution, by setting R4 of the second outer corner to be greater than R2 of the adjacent second inner corner, the structural strength of the second groove at the second outer corner is greater than that at the second inner corner. This reduces the number and size of cracks on the first conductive layer of the first conductive substrate exposed in the second groove, and makes the local resistance of the first conductive layer affected by cracks change less. This reduces the impact on the conductivity between the second busbar and the first conductive layer, thus satisfying the normal color-changing effect of the electrochromic device.

[0019] In some embodiments, a gap region is provided between adjacent first and second grooves, wherein in one of the gap regions, R3 = R4 > R1 = R2.

[0020] In some embodiments, a gap region is provided between adjacent first and second grooves, wherein in one of the gap regions, R3 > R4 = R1 = R2.

[0021] In some embodiments, a gap region is provided between adjacent first and second grooves, wherein in one of the gap regions, R4 > R3 = R1 = R2.

[0022] In some embodiments, R1, R2, R3, and R4 all satisfy the following conditions: R1≥1mm, R2≥1mm, R3≥1mm, and R4≥1mm.

[0023] In some embodiments, a gap is provided between adjacent first grooves and second grooves, the width of the first groove is W1, and in the corresponding gap, R3≥1 / 2W1.

[0024] By adopting the above technical solution, the structural strength of the first groove at the first outer corner is increased to a greater extent, effectively reducing the number and size of cracks on the second conductive substrate layer in the first groove, and ensuring the conductivity between the busbar and the conductive substrate layer.

[0025] In some embodiments, a gap is provided between adjacent first and second grooves, the width of the second groove is W2, and in the corresponding gap, R4≥1 / 2W2.

[0026] By adopting the above technical solution, the structural strength of the second groove at the second outer corner is increased to a greater extent, effectively reducing the number and size of cracks on the conductive substrate layer in the second groove, and ensuring the conductivity between the busbar and the conductive substrate layer.

[0027] In some embodiments, the length of W1 ranges from 4 to 10 mm; the length of W2 ranges from 4 to 10 mm.

[0028] In some embodiments, a through groove is provided at the interval region, the through groove connecting adjacent first grooves and second grooves, and the first conductive substrate layer, the electrochromic layer and the second conductive substrate layer pass through the through groove.

[0029] By adopting the above technical solution, there is no electrochromic layer at the through-slot. Therefore, the electrolyte material of the electrochromic layer will not be deposited to form a conductor that connects the first and second conductive layers. In other words, there is no material that can conduct or short-circuit.

[0030] In some embodiments, a gap region is provided between adjacent first grooves and second grooves, and the gap region is provided with a protrusion, the protrusion separating adjacent first grooves and second grooves, and the first conductive substrate layer, the electrochromic layer and the second conductive substrate layer are stacked on the protrusion.

[0031] In some embodiments, in one of the interval regions, the length between the side of the first groove near the interval region and the side of the second groove near the interval region is L0; wherein...

[0032] The protrusion is formed in the interval region, and R3+R4≤L0.

[0033] Secondly, embodiments of this application provide an electrochromic device, including a substrate and the electrochromic device, wherein the substrate is disposed on the side of the first conductive substrate layer opposite to the electrochromic layer; and / or, the substrate is disposed on the side of the second conductive substrate layer opposite to the electrochromic layer. Attached Figure Description

[0034] 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a top view of an electrochromic device provided in an embodiment of this application;

[0036] Figure 2 A schematic diagram of the structure of a local peripheral edge of an electrochromic device provided in an embodiment of this application;

[0037] Figure 3 A cross-sectional view of an electrochromic device provided in another embodiment of this application in the stacking direction; wherein, the spacer region is provided with a through groove;

[0038] Figure 4 A cross-sectional view of an electrochromic device provided in another embodiment of this application in the stacking direction; wherein, the interval region is provided with a protrusion;

[0039] Figure 5 This is a schematic diagram of the structure of an electrochromic device provided in an embodiment of the present application at a spacer region, wherein R3 = R4 > R1 = R2, and the spacer region is provided with a through groove;

[0040] Figure 6 This is a schematic diagram of the structure of an electrochromic device in a spacer region according to another embodiment of this application, wherein R3 = R4 > R1 = R2, and the spacer region is provided with a through groove;

[0041] Figure 7 This is a schematic diagram of the structure of an electrochromic device provided in an embodiment of the present application at a spacer region, wherein R3 > R4 = R1 = R2, and the spacer region is provided with a through groove;

[0042] Figure 8 This is a schematic diagram of the structure of an electrochromic device provided in an embodiment of the present application at a spacer region, wherein R3 = R4 > R1 = R2, and the spacer region is provided with a protrusion;

[0043] Figure 9 This is a schematic diagram of the structure of an electrochromic device provided in an embodiment of the present application at a spacer region, wherein R3 = R4 > R1 = R2, a protrusion is formed in the spacer region, and R3 + R4 > L0;

[0044] Figure 10 A cross-sectional view of the spacer region of an electrochromic device provided in an embodiment of this application in the stacking direction, wherein the spacer region is provided with a through groove;

[0045] Figure 11 A cross-sectional view of the spacer region of an electrochromic device provided in an embodiment of this application in the stacking direction, wherein the spacer region is provided with a protrusion;

[0046] Figure 12 Comparison diagrams showing cracks formed at different shapes of inner and outer corners of an electrochromic device provided in another embodiment of this application.

[0047] In the figure, the various attached labels,

[0048] 1000. Electrochromic devices;

[0049] 100, First conductive substrate layer; 110, First substrate layer; 120, First conductive layer;

[0050] 200. Electrochromic layer; 201. First bottom edge; 202. Second bottom edge;

[0051] 300, Second conductive substrate layer; 310, Second substrate layer; 320, Second conductive layer;

[0052] 400, Groove; 410, First Groove; 420, Second Groove;

[0053] 411, First side; 421, Second side; 412, Third side; 422, Fourth side;

[0054] 500, interior angle; 510, first interior angle; 520, second interior angle;

[0055] 600, exterior angle; 610, first interior angle; 620, second exterior angle;

[0056] 700, Interval area; 710, Through groove; 720, Protrusion; 730, Notch;

[0057] 800, Busbar; 810, First Busbar; 820, Second Busbar;

[0058] 900, insulating adhesive; 910, first insulating adhesive; 920, second insulating adhesive; 930, third insulating adhesive. Detailed Implementation

[0059] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0060] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing 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, and therefore should not be construed as a limitation of this application.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0062] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0063] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] In existing technologies, the manufacturing process of electrochromic devices requires high-pressure pressing. During this pressing process, the edges of the electrochromic device often become critical areas of concentrated stress. When these edge areas are subjected to external pressure, the conductive substrate layer in the electrochromic device is prone to cracking, leading to flaking and affecting the performance of the conductive substrate layer, specifically manifested as a significant increase in local resistance. Furthermore, electrochromic devices typically have busbars at their edges, usually made of highly conductive materials (such as silver paste or copper foil). These conductive materials are used to conduct electricity through the electrochromic device, causing it to change color. If the conductive substrate layer experiences increased local resistance due to cracking, it directly affects the conductivity between the busbar and the conductive substrate layer, thus impacting the normal color-changing effect of the electrochromic device.

[0065] Based on this, in order to solve the above problems, this application designs an electrochromic device. By designing the radius of the outer corner of the groove to be larger than the radius of the adjacent inner corner, the structural strength of the groove at the outer corner is higher, which greatly reduces the number and size of cracks in the electrochromic device at the outer corner, reduces the risk of cracking of the conductive substrate layer in the groove, and thus reduces the adverse effects on the conductivity between the busbar and the conductive layer, thereby improving the reliability of the product.

[0066] refer to Figures 1 to 5 The first aspect of this application provides an electrochromic device 1000, including a first conductive substrate layer 100, an electrochromic layer 200, and a second conductive substrate layer 300 stacked sequentially. The edge of the electrochromic device 1000 is provided with a plurality of grooves 400, each groove 400 penetrating the electrochromic layer 200 and penetrating at least one of the first conductive substrate layer 100 and the second conductive substrate layer 300. The grooves 400 form an inner angle 500 and an outer angle 600 on the orthographic projection of the plane containing the electrochromic layer 200. The inner angle 500 and the outer angle 600 are located on the inner and outer sides of the edge of the electrochromic device 1000, respectively. Both the inner angle 500 and the outer angle 600 are rounded, and the radius of at least one outer angle 600 is larger than the radius of the adjacent inner angle 500 in the same groove 400.

[0067] Specifically, 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, ensuring that the electrochromic layer 200 is not exposed outside the electrochromic device 1000, thus effectively protecting the electrochromic layer 200. The electrochromic layer 200 is made of electrochromic material and can exhibit 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] In the embodiments of this application, the edge of the electrochromic device 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 device 1000; and a second groove 420 that penetrates the second conductive substrate layer 300 and the electrochromic layer 200 along the stacking direction.

[0072] Among them, reference Figure 3 and Figure 4 The electrochromic device 1000 has a plurality of alternating first grooves 410 and second grooves 420 on its edge. In this embodiment, at least one first groove 410 and at least one second groove 420 are provided on any side of the edge of the electrochromic device 1000.

[0073] The number of first grooves 410 and second grooves 420 is multiple, and can be any number greater than two, which can be specifically set according to the actual situation. Specifically, multiple first grooves 410 are distributed alternately on the edge of the electrochromic device 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 by etching or laser engraving the first substrate layer 110, the first conductive layer 120 and the electrochromic layer 200.

[0074] Meanwhile, multiple second grooves 420 are distributed at intervals along the edge of the electrochromic device, with each second groove 420 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 by etching or laser engraving the second substrate layer 310, the second conductive layer 320, and the electrochromic layer 200.

[0075] Further, refer to Figure 1 , Figure 2 , Figure 10 and Figure 11 The electrochromic device 1000 has busbars 800 on both sides in the stacking direction. One busbar 800 is at least partially electrically connected to the second conductive layer 320 through multiple first grooves 410; the other busbar 800 is at least partially electrically connected to the first conductive layer 120 through multiple second grooves 420. Exemplarily, the busbars 800 may be made of conductive materials including, but not limited to, conductive copper foil, conductive adhesive, and conductive resin, thereby enabling the formation of a multi-electrode structure at the edge of the electrochromic device 1000 and accelerating the color-changing speed of the electrochromic device 1000.

[0076] refer to Figure 2 , Figures 5 to 9 Each groove 400 has an interior angle 500 and an exterior angle 600 on the orthographic projection of the plane containing the electrochromic layer 200. The interior angle 500 and the exterior angle 600 are located on the inner and outer sides of the edge of the electrochromic device 1000, respectively. Both the interior angle 500 and the exterior angle 600 are rounded, and the radius of at least one exterior angle 600 is larger than the radius of the adjacent interior angle 500. The groove 400 has a side connecting the inner and outer sides of the edge of the electrochromic device 1000, with adjacent interior angles 500 and exterior angles 600 located at the two ends of the side.

[0077] refer to Figure 12 The manufacturing process of the electrochromic device 1000 requires high-pressure pressing. During this pressing process, the edges of the electrochromic device 1000 often become critical areas of stress concentration. When the edges of the electrochromic device 1000 are subjected to external pressure, cracks are easily generated at the inner corner 50° and outer corner 60° of the groove 400, leading to chipping. This affects the performance of the corresponding conductive substrate layer, specifically manifesting as a significant increase in the local resistance of the conductive substrate layer. When the chipping worsens to a certain extent, the electrochromic layer 200 may also chip, causing electrolyte precipitation and resulting in a short circuit in the electrochromic device 1000.

[0078] By setting the inner corner 500 and the outer corner 600 as rounded corners, when the groove 400 at the edge of the electrochromic device 1000 is subjected to pressure, the rounded corners can effectively disperse the pressure compared to the right angle, reduce the stress concentration of the groove 400 at the inner corner 500 and the outer corner 600, improve the structural strength at the inner corner 500 and the outer corner 600, reduce the number and size of cracks, and reduce the risk of fracture of the conductive substrate layer.

[0079] refer to Figure 5 and Figure 12 Understandably, when the edge of the electrochromic device 1000 is subjected to stress at the outer corner 600 in the groove 400, cracks are easily generated on the conductive layer of the corresponding conductive substrate in the groove 400, resulting in an increase in the local resistance of the conductive layer. Since the busbar 800 is connected to the conductive layer in the groove 400, the conductivity between the busbar 800 and the conductive layer is reduced, which slows down the color-changing rate of the electrochromic device 1000 and affects the normal color-changing effect of the electrochromic device 1000.

[0080] This application designs the radius of the outer corner 600 in the groove 400 to be larger than the radius of the adjacent inner corner 500, thereby increasing the structural strength of the groove 400 at the outer corner 600. This significantly reduces the number and size of cracks in the electrochromic device 1000 at the outer corner 600, lowers the risk of cracking in the conductive substrate layer within the groove 400, and thus reduces the adverse effects on the conductivity between the busbar 800 and the conductive layer, improving product reliability.

[0081] refer to Figure 2 , Figure 5 , Figure 10 and Figure 11In some embodiments, the electrochromic device 1000 has a busbar 800 at its edge; the busbar 800 is at least partially located in the groove 400 and forms an electrical connection with the first conductive substrate layer 100, and / or the busbar 800 is at least partially located in the groove and forms an electrical connection with the second conductive substrate layer 300.

[0082] Understandably, the width of the busbar 800 located in the groove 400 is not greater than the width of the corresponding groove 400; the width direction of the groove 400 is perpendicular to the length direction of one side of the electrochromic device 1000.

[0083] refer to Figure 10 and Figure 11 The busbar 800 includes a first busbar 810, with at least one first busbar 810 disposed on the side of the first substrate 110 away from the electrochromic layer 200. It is understood that the number of first busbars 810 can be one, two, or more, and can be specifically set according to actual conditions. Each first busbar 810 is electrically connected to the second conductive layer 320 through at least one first groove 410. Specifically, one first busbar 810 is electrically connected to the second conductive layer 320 through a conductive copper foil, and the conductive copper foil is located in the first groove 410. Optionally, one first busbar 810 is electrically connected to the second conductive layer 320 through multiple conductive copper foils, and each conductive copper foil is respectively disposed in a first groove 410.

[0084] For example, the busbar 800 includes a second busbar 820, with at least one second busbar 820 provided on the side of the second substrate 310 away from the electrochromic layer 200. It is understood that the number of second busbars 820 can be one, two, or more, depending on the specific circumstances. Each second busbar 820 is electrically connected to the first conductive layer 120 via at least one second groove 420. Specifically, one second busbar 820 is electrically connected to the first conductive layer 120 via a conductive copper foil, and the conductive copper foil is located in the second groove 420. Optionally, one second busbar 820 is electrically connected to the first conductive layer 120 via multiple conductive copper foils, and each conductive copper foil is respectively disposed in one second groove 420.

[0085] By setting multiple alternating first grooves 410 and second grooves 420 on the edge of the electrochromic device 1000, and electrically connecting the first busbar 810 to the second conductive layer 320 through the first groove 410, and the second busbar 820 to the first conductive layer 120 through the second groove 420, the electrochromic device 1000 is made conductive through the first busbar 810 and the second busbar 820, thereby achieving rapid color change of the electrochromic device 1000.

[0086] refer to Figure 1 , Figure 3 and Figure 4 In some embodiments, the groove 400 includes a first groove 410 penetrating the first conductive substrate layer 100 and the electrochromic layer 200 along the stacking direction, and a second groove 420 penetrating the second conductive substrate layer 300 and the electrochromic layer 200 along the stacking direction; the first groove 410 and the second groove 420 are alternately arranged along the edge of the electrochromic device 1000, and a gap region 700 is provided between adjacent first grooves 410 and second grooves 420.

[0087] Understandably, by alternately setting the first groove 410 and the second groove 420 on the edge of the electrochromic device 1000, and connecting the busbars 800 to the first groove 410 and the second groove 420 respectively, an alternating electrode structure is formed. The electrode structure is connected to the positive and negative terminals of the external power supply respectively, and forms an electrical connection with the external power supply. Since the first groove 410 and the second groove 420 are alternately set, the color-changing speed of the electrochromic device 1000 is effectively improved.

[0088] In some embodiments, reference Figure 3 and Figure 10 An interval 700 is provided between adjacent first grooves 410 and second grooves 420, and a through groove 710 is provided at the interval 700. Specifically, along the stacking direction of the electrochromic device 1000, a through groove 710 with a through structure is formed at the interval between adjacent alternating first grooves 410 and second grooves 420. 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 pass through the through groove.

[0089] In this embodiment, a plurality of spaced-apart through grooves 710 are provided on the edge of the electrochromic device 1000. The depth of the through grooves 710 is greater than the depth of the first groove 410 and the second groove 420. The through grooves 710 penetrate the first substrate layer 110, the first conductive layer 120, the electrochromic layer 200, the second conductive layer 320, and the second substrate layer 310 along the stacking direction of the electrochromic device 1000. At this time, the through grooves 710 penetrate the thickness of the electrochromic device 1000 at its edge, and the two ends of the through grooves 710 are respectively connected to the adjacent first groove 410 and the second groove 420. The number of through grooves 710 can be two or more arbitrary numbers, which can be specifically set according to the actual situation.

[0090] It is understood that in this embodiment, the electrochromic device 1000 has a smaller thickness at the location of the through groove 710, resulting in less pressure on the electrochromic device 1000 at the through groove 710 compared to the pressure at the locations of the first groove 410 and the second groove 420. Furthermore, since the through groove 710 does not have an electrochromic layer 200, the electrolyte in the electrochromic layer 200 will not precipitate and form a conductor to connect the first conductive layer 120 and the second conductive layer 320. In other words, there is no material that can conduct or short-circuit, effectively preventing chemical short circuits caused by pressure on the edges of the electrochromic device 1000. This solves the problem of localized short circuits occurring when the electrochromic device 1000 is compressed, ensuring the stability of the device.

[0091] In other embodiments, reference is made to Figure 4 and Figure 11 An interval 700 is provided between adjacent first grooves 410 and second grooves 420, and a protrusion 720 is provided at the interval 700. Specifically, along the stacking direction of the electrochromic device 1000, a protrusion 720 with a raised structure is formed at the interval between adjacent alternating first grooves 410 and second grooves 420. The protrusion 720 separates 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 are stacked at the protrusion.

[0092] In the above embodiments of this application, at the edge of the electrochromic device 1000, the gap between adjacent first grooves 410 and second grooves 420 includes a through groove 710 with a through structure and / or a protrusion 720 with a raised structure.

[0093] refer to Figure 1 The first groove 410 and the second groove 420 are arranged circumferentially along the electrochromic device 1000, and their lengths along the direction of arrangement are the lengths 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 device 1000 corresponds to the length direction of one side of the electrochromic device 1000; and the length of the second groove 420 on any side of the electrochromic device 1000 corresponds to the length direction of one side of the electrochromic device 1000.

[0094] Specifically, refer to Figures 5 to 9The first groove 410 penetrates the first conductive substrate layer 100 and the electrochromic layer 200 along the stacking direction of the electrochromic device 1000 through etching or laser engraving processes. The side of the first groove 410 near the spacer region 700 has a side edge connecting the inner and outer sides of the edge of the electrochromic device 1000. The second groove 420 penetrates the second conductive substrate layer 300 and the electrochromic layer 200 along the stacking direction of the electrochromic device 1000 through etching or laser engraving processes. The side of the second groove 420 near the spacer region 700 has a side edge connecting the inner and outer sides of the edge of the electrochromic device 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, reference Figure 3 , Figure 5 , Figure 6 and Figure 7 The first groove 410 and the second groove 420 are arranged along the length of one side of the electrochromic device 1000. A through groove 710 is provided in the gap region 700 between the first groove 410 and the second groove 420. 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 of the first groove 410 near the gap region 700 is called the first side 411, and the side of the second groove 420 near the gap region 700 is called the second side 421.

[0096] refer to Figure 5 In some embodiments, the electrochromic layer 200 forms a first bottom edge 201 on the side near the spacer region 700. Specifically, the first side edge 411 and the second side edge 421 each have opposite ends. On the orthographic projection of the plane containing the electrochromic layer 200, the end of the first side edge 411 near the inner side of the electrochromic device 1000 is connected to the first bottom edge 201, while the end of the second side edge 421 near the inner side of the electrochromic device 1000 is connected to the first bottom edge 201. Thus, the first side edge 411, the first bottom edge 201, and the second side edge 421 are interconnected to form a semi-open region, the open end of which faces outwards towards the electrochromic device 1000.

[0097] refer to Figure 6 and Figure 7 In some other embodiments, the portion of the first side 411 near the inner side of the electrochromic device 1000 is connected to the portion of the second side 421 near the inner side of the electrochromic device 1000, specifically, they may intersect or be tangent; thus, the first side 411 and the second side 421 are connected to form a semi-open area, the open port of which faces the outer side of the electrochromic device 1000.

[0098] In other embodiments, reference is made to... Figure 4 , Figure 8 , Figure 9 The first groove 410 and the second groove 420 are arranged along the length direction of one side of the electrochromic device 1000. A protrusion 720 is provided at the interval 700 between the first groove 410 and the second groove 420. The first conductive substrate layer 100, the electrochromic layer 200 and the second conductive substrate layer 300 are stacked on the protrusion 720. The side of the first groove 410 near the interval 700 is the third side 412, and the side of the second groove 420 near the interval 700 is the fourth side 422.

[0099] refer to Figure 8 In some embodiments, the electrochromic layer 200 forms a second bottom edge 202 on the side near the spacer region 700, and the second bottom edge 202 is located outside the edge of the electrochromic device 1000; the third side edge 412 and the fourth side edge 422 each have opposite ends, wherein, on the orthographic projection of the plane where the electrochromic layer 200 is located, the end of the third side edge 412 near the outside of the electrochromic device 1000 is connected to the second bottom edge 202, and at the same time, the end of the fourth side edge 422 near the outside of the electrochromic device 1000 is connected to the second bottom edge 202. Thus, the third side edge 412, the second bottom edge 202 and the fourth side edge 422 are interconnected to form a semi-open region, the open port of which faces the inside of the electrochromic device 1000.

[0100] refer to Figure 9 In some other embodiments, the portion of the third side 412 near the outside of the electrochromic device 1000 is connected to the portion of the fourth side 422 near the outside of the electrochromic device 1000, specifically, they may intersect or be tangent; thus, the third side 412 and the fourth side 422 are connected to form a semi-open region, the open port of which faces the inside of the electrochromic device 1000.

[0101] refer to Figure 1 , Figures 4 to 8 In some embodiments, the first groove 410 has a first interior angle 510 and a first exterior angle 610 in the orthographic projection of the plane where the electrochromic layer 200 is located, and the second groove 420 has a second interior angle 520 and a second exterior angle 620 in the orthographic projection of the plane where the electrochromic layer 200 is located; the radius of the rounded corner of the first interior angle 510 is R1, the radius of the rounded corner of the second interior angle 520 is R2, the radius of the rounded corner of the first exterior angle 610 is R3, and the radius of the rounded corner of the second exterior angle 620 is R4.

[0102] In some embodiments, the R3 of at least one first outer angle 610 is greater than the R1 of the adjacent first inner angle 510, such that the structural strength of the first groove 410 at the first outer angle 610 is greater than the structural strength at the first inner angle 510.

[0103] For example, refer to Figure 3 , Figures 5 to 7 A through groove 710 is provided in the interval region 700. A first inner angle 510 and a first outer angle 610 are located on the inner and outer sides of the interval region 700, respectively. The side of the first groove 410 near the interval region 700 is a first side 411. The first side 411 has two opposing ends. The end of the first side 411 near the inner side of the electrochromic device 1000 has a first inner angle 510, and the end of the first side 411 near the outer side of the electrochromic device 1000 has a first outer angle 610. In some embodiments, reference... Figure 5 On the orthographic projection of the plane containing the electrochromic layer 200, the first inner angle 510 connects the first side edge 411 and the first bottom edge 201, and the first outer angle 610 connects the first side edge 411 and the periphery of the electrochromic device 1000. In some other embodiments, reference is made to... Figure 6 , Figure 7 On the orthographic projection of the plane containing the electrochromic layer 200, the first inner angle 510 connects the inner edge of the first side 411 and the second groove 420, and the inner edge of the second groove 420 extends along the length direction of one side of the electrochromic device 1000; the first outer angle 610 connects the first side 411 and the periphery of the electrochromic device 1000.

[0104] By setting the radius R3 of the first outer corner 610 on the first side 411 to be greater than the radius R1 of the first inner corner 510, the structural strength of the first groove 410 at the first outer corner 610 is greater than that at the first inner corner 510. This reduces the number and size of cracks on the second conductive layer 320 of the second conductive substrate layer 300 exposed in the first groove 410, and makes the local resistance of the second conductive layer 320 less affected by cracks. This reduces the impact on the conductivity between the first busbar 810 and the second conductive layer 320, thus satisfying the normal color-changing effect of the electrochromic device 1000.

[0105] Optional, see reference Figure 8 and Figure 9 A protrusion 720 is provided at the interval 700. A first inner angle 510 and a first outer angle 610 are located on the inner and outer sides of the interval 700, respectively. The side of the first groove 410 near the interval 700 is a third side 412. The third side 412 has two opposing ends; the end of the third side 412 near the inner side of the electrochromic device 1000 has a first inner angle 510, and the end of the third side 412 near the outer side of the electrochromic device 1000 has a first outer angle 610. In some embodiments, reference... Figure 8On the orthographic projection of the plane containing the electrochromic layer 200, the first inner angle 510 connects the third side 412 and the inner edge of the first groove 410, the inner edge of the first groove 410 extending along the length direction of one side of the electrochromic device 1000; the first outer angle 610 connects the third side 412 and the second bottom edge 202. In some other embodiments, reference is made to... Figure 9 On the orthographic projection of the plane containing the electrochromic layer 200, the first inner angle 510 connects the third side 412 and the inner edge of the first groove 410, and the inner edge of the first groove 410 extends along the length direction of one side of the electrochromic device 1000; the first outer angle 610 connects the third side 412 and the periphery of the electrochromic device 1000.

[0106] By setting the R3 of the first outer corner 610 on the third side 412 to be greater than the R1 of the adjacent first inner corner 510, the structural strength of the first groove 410 at the first outer corner 610 is greater than the structural strength at the first inner corner 510. This reduces the number and size of cracks on the second conductive layer 320 of the second conductive substrate layer 300 exposed in the first groove 410, making the local resistance of the second conductive layer 320 less affected by cracks. This reduces the impact on the conductivity between the first busbar 810 and the second conductive layer 320, thus satisfying the normal color-changing effect of the electrochromic device 1000.

[0107] In other embodiments, at least one second outer angle 620 has an R4 greater than the adjacent second inner angle 520, such that the structural strength of the second groove 420 at the second outer angle 620 is greater than the structural strength at the second inner angle 520.

[0108] For example, refer to Figure 3 , Figures 5 to 7 A through groove 710 is provided at the interval 700. The second inner angle 520 and the second outer angle 620 are located on the inner and outer sides of the interval 700, respectively. The side of the second groove 420 near the interval 700 is a second side 421. The second side 421 has two opposite ends. The end of the second side 421 near the inner side of the electrochromic device 1000 has a second inner angle 520, and the end of the second side 421 near the outer side of the electrochromic device 1000 has a second outer angle 620. In some embodiments, reference... Figure 5 On the orthographic projection of the plane containing the electrochromic layer 200, the second inner angle 520 connects the second side edge 421 and the first bottom edge 201, and the second outer angle 620 connects the second side edge 421 and the periphery of the electrochromic device 1000. In some other embodiments, reference is made to... Figure 6On the orthographic projection of the plane containing the electrochromic layer 200, the second inner angle 520 connects the second side 421 and the inner edge of the first groove 410, with the inner edge of the first groove 410 extending along the length direction of one side of the electrochromic device 1000; the second outer angle 620 connects the second side 421 and the periphery of the electrochromic device 1000.

[0109] By setting the R4 of the second outer corner 620 on the second side 421 to be greater than the R2 of the adjacent second inner corner 520, the structural strength of the second groove 420 at the second outer corner 620 is greater than that at the second inner corner 520. This reduces the number and size of cracks on the first conductive layer 120 of the first conductive substrate 100 exposed in the second groove 420, making the local resistance of the first conductive layer 120 less affected by cracks. This reduces the impact on the conductivity between the second busbar 820 and the first conductive layer 120, thus satisfying the normal color-changing effect of the electrochromic device 1000.

[0110] Optional, see reference Figure 8 and Figure 9 A protrusion 720 is provided at the interval 700. A second inner angle 520 and a second outer angle 620 are located on the inner and outer sides of the interval 700, respectively. The side of the second groove 420 near the interval 700 is a fourth side 422. The fourth side 422 has two opposing ends. The end of the fourth side 422 near the inner side of the electrochromic device 1000 has a second inner angle 520, and the end of the fourth side 422 near the outer side of the electrochromic device 1000 has a second outer angle 620. In some embodiments, reference... Figure 8 On the orthographic projection of the plane containing the electrochromic layer 200, the second inner angle 520 connects the fourth side 422 and the inner edge of the second groove 400, the inner edge of the second groove 400 extending along the length direction of one side of the electrochromic device 1000; the second outer angle 620 connects the fourth side 422 and the second bottom edge 202. (Reference) Figure 9 In some other embodiments, on the orthographic projection of the plane containing the electrochromic layer 200, the second inner angle 520 is connected between the fourth side 422 and the inner edge of the second groove 400, the inner edge of the second groove 400 extending along the length direction of one side of the electrochromic device 1000; the second outer angle 620 is connected between the fourth side 422 and the periphery of the electrochromic device 1000.

[0111] By setting R4 of the second outer corner 620 on the fourth side 422 to be greater than R2 of the adjacent second inner corner 520, the structural strength of the second groove 420 at the second outer corner 620 is greater than that at the second inner corner 520. This reduces the number and size of cracks on the first conductive layer 120 of the first conductive substrate 100 exposed in the second groove 420, and makes the local resistance of the first conductive layer 120 less affected by cracks. This reduces the impact on the conductivity between the second busbar 820 and the first conductive layer 120, thus satisfying the normal color-changing effect of the electrochromic device 1000.

[0112] In some other embodiments, at least one first outer angle 610 has an R3 greater than the adjacent first inner angle 510, and at least one second outer angle 620 has an R4 greater than the adjacent second inner angle 520. That is, the structural strength of the first groove 410 at the first outer angle 610 is greater than the structural strength at the first inner angle 510, and the structural strength of the second groove 420 at the second outer angle 620 is greater than the structural strength at the second inner angle 520.

[0113] refer to Figure 5 , Figure 6 , Figure 8 and Figure 9 In some embodiments, a gap 700 is provided between adjacent first grooves 410 and second grooves 420. In a gap 700, R3 = R4 > R1 = R2, which can simultaneously reduce the cracks of the second conductive substrate layer 300 exposed in the first groove 410 and the first conductive substrate layer 100 exposed in the second groove 420, thereby effectively reducing the risk of reduced conductivity between the busbar 800 and the conductive substrate layer.

[0114] In other embodiments, reference is made to... Figure 7 A gap region 700 is provided between adjacent first grooves 410 and second grooves 420. In one gap region 700, R3 > R4 = R1 = R2. Increasing only the radius R3 of the first outer corner 610 can reduce the risk of breakage of the second conductive layer 320 exposed in the second conductive substrate layer 300 within the first groove 410. In some other embodiments, a gap region 700 is provided between adjacent first grooves 410 and second grooves 420. In one gap region 700, R4 > R3 = R1 = R2. That is, increasing only the radius R4 of the second outer corner 620 can reduce the risk of breakage of the first conductive layer 120 exposed in the first conductive substrate layer 100 within the second groove 420.

[0115] In some embodiments, R1, R2, R3, and R4 all satisfy the following conditions: R1≥1mm, R2≥1mm, R3≥1mm, and R4≥1mm; thereby effectively improving the structural strength of the electrochromic device 1000 at the first inner angle 510, the second inner angle 520, the first outer angle 610, and the second outer angle 620, and improving the structural reliability.

[0116] refer to Figure 6 In some embodiments, a gap 700 is provided between adjacent first grooves 410 and second grooves 420, the width of the first groove 410 is W1, and in the corresponding gap 700, R3≥1 / 2W1.

[0117] Specifically, the width direction of the first groove 410 is perpendicular to the length direction of the corresponding side of the electrochromic device 1000, that is, the width direction of the first groove 410 is parallel to the central axis of the interval region 700; the radius R3 of the first outer corner 610 is greater than or equal to 1 / 2W1, thereby increasing the structural strength of the first groove 410 at the first outer corner 610 to a greater extent, effectively reducing the number and size of cracks on the second conductive substrate in the first groove 410, and ensuring the conductivity between the busbar 800 and the conductive substrate.

[0118] refer to Figure 6 In some embodiments, a gap 700 is provided between adjacent first grooves 410 and second grooves 420, the width of the second groove 420 is W2, and in the corresponding gap 700, R4≥1 / 2W2.

[0119] Specifically, the width direction of the second groove 420 is perpendicular to the length direction of the corresponding side of the electrochromic device 1000, that is, the width direction of the second groove 420 is parallel to the central axis of the interval region 700; the radius R4 of the second outer corner 620 is ≥ 1 / 2W2, thereby increasing the structural strength of the second groove 420 at the second outer corner 620 to a greater extent, effectively reducing the number and size of cracks on the conductive substrate layer in the second groove 420, and ensuring the conductivity between the busbar 800 and the conductive substrate layer.

[0120] In some embodiments, the length of W1 ranges from 4 to 10 mm. Specifically, the length of W1 can be within any length range of 4 mm-5 mm, 5 mm-6 mm, 6 mm-7 mm, 7 mm-8 mm, 8 mm-9 mm, or 9 mm-10 mm.

[0121] In some embodiments, the length of W2 ranges from 4 to 10 mm. Specifically, the length of W2 can be within any length range of 4 mm-5 mm, 5 mm-6 mm, 6 mm-7 mm, 7 mm-8 mm, 8 mm-9 mm, or 9 mm-10 mm.

[0122] In some embodiments, W1 is equal to W2. The widths of the first groove 410 and the second groove 420 located on both sides of the spacer region 700 are equal, so that the stress of the electrochromic device 1000 at the spacer region 700 can be evenly distributed to the first outer corner 610 and the second outer corner 620, avoiding excessive local pressure and reducing the number and size of cracks in the first conductive substrate layer 100 and the second conductive substrate layer 300.

[0123] In some embodiments, a gap region 700 is provided between adjacent first grooves 410 and second grooves 420. In a gap region 700, the length between the side of the first groove 410 near the gap region 700 and the side of the second groove 420 near the gap region is L0. A protrusion 720 is formed in the gap region 700, and R3+R4≤L0.

[0124] Specifically, when a protrusion 720 is formed at the interval 700, the side of the first groove 410 near the interval 700 is the third side 412, and the side of the second groove 420 near the interval 700 is the fourth side 422; L0 is the maximum distance between the non-rounded corner portion of the third side 412 and the non-rounded corner portion of the fourth side 422 along the length direction of one side of the electrochromic device 1000.

[0125] refer to Figure 9 If the sum of the radius R3 of the first outer corner 610 and the radius R4 of the second outer corner 620 is designed to be greater than L0, then along the orthogonal projection direction of the plane where the electrochromic layer 200 is located, the first outer corner 610 and the second outer corner 620 will intersect, resulting in a notch 10 forming at the first outer corner 610 and the second outer corner 620 at a protrusion 720 on the periphery of the electrochromic device 1000. When the periphery of the electrochromic layer 1000 is subjected to stress, the stress is likely to concentrate at the notch 10, thereby increasing the risk of breakage of the first conductive substrate layer 100 and the second conductive substrate layer 300. Therefore, when a protrusion 720 is formed at the interval region 700, R3+R4≤L0, improving the reliability of the product.

[0126] In some embodiments, the length of L0 ranges from 2mm to 15mm; specifically, the length of L0 can be within any length range of 2mm-3mm, 3mm-4mm, 4mm-5mm, 5mm-6mm, 6mm-7mm, 7mm-8mm, 8mm-9mm, 9mm-10mm, 10mm-11mm, 11mm-12mm, 12mm-13mm, 13mm-14mm, and 14mm-15mm.

[0127] Further reference Figure 10 and Figure 11In some embodiments, the electrochromic device 1000 may further include an insulating adhesive 900, which includes a first insulating adhesive 910 and a second insulating adhesive 920. The first insulating adhesive 910 may be disposed on a 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 may be disposed on a 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.

[0128] In some embodiments, the first insulating adhesive 910 may at least partially cover the first groove 410, and the second insulating adhesive 920 may at least partially cover the second groove 420. Thus, a portion of the insulating adhesive is bonded to the substrate layer, and a portion is bonded to the exposed conductive layer at the groove location, which can form a reinforcement effect on the edge of the groove and prevent interlayer delamination or other issues from occurring at the edge of the groove.

[0129] In other embodiments, a first insulating adhesive 910 at least partially covers the first busbar 810 and at least partially covers the first groove 410, and a second insulating adhesive 920 at least partially covers the second busbar 820 and at least partially covers the second groove 420. Thus, by covering the busbar with insulating adhesive, the interlayer bonding strength of the device can be improved.

[0130] refer to Figure 10 In some embodiments, the insulating adhesive 900 further includes a third insulating adhesive 930, a portion of which is bonded to the first substrate layer 110 and a portion of which is bonded to the second conductive layer 320 exposed in the first groove 410; the first busbar 810 at least partially covers the third insulating adhesive 930; the third insulating adhesive 930 is used to isolate the first busbar 810 and the second busbar 820 at the through groove 710, preventing the first busbar 810 and the second busbar 820 at the through groove 710 from forming a connection and thus causing a short circuit, thereby improving product reliability.

[0131] In some other embodiments, the insulating adhesive 900 further includes a third insulating adhesive 930, a portion of which is bonded to the second substrate layer 310 and a portion of which is bonded to the first conductive layer 120 exposed in the second groove 420; the second busbar 820 at least partially covers the third insulating adhesive 930; the third insulating adhesive 930 is used to isolate the first busbar 810 and the second busbar 820 at the through groove 710, preventing the first busbar 810 and the second busbar 820 at the through groove 710 from forming a connection and thus causing a short circuit, thereby improving product reliability.

[0132] A second aspect of this application provides an electrochromic device (not shown), including a substrate and an electrochromic device 1000, wherein the substrate is disposed on the side of a first conductive substrate layer 100 opposite to the electrochromic layer 200; and / or, the substrate is disposed on the side of a second conductive substrate layer 300 opposite to the electrochromic layer 200.

[0133] Specifically, the electrochromic device 1000 has substrates on both sides in the thickness direction, and the substrates are transparent and preferably glass.

[0134] It is understood that the electrochromic device has the functions and beneficial effects of the electrochromic device 1000 in any of the above embodiments, which will not be described in detail here.

[0135] This application also provides an electrochromic product, including the aforementioned electrochromic device 1000 or electrochromic apparatus. The electrochromic product includes any one of a car sunroof, car side window, car windshield, and building doors and windows.

[0136] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electrochromic device, characterized in that, include: A first conductive substrate layer, an electrochromic layer, and a second conductive substrate layer are sequentially stacked. The electrochromic device has a plurality of grooves along its edge. Each groove penetrates the electrochromic layer along the stacking direction of the electrochromic device and penetrates at least one of the first conductive substrate layer and the second conductive substrate layer. The grooves form an interior angle and an exterior angle on the orthographic projection of the plane containing the electrochromic layer. The interior angle and the exterior angle are located on the inner and outer sides of the edge of the electrochromic device, respectively, and both the interior angle and the exterior angle are rounded. The radius of at least one of the outer corners is set to be greater than the radius of the adjacent inner corners in the same groove.

2. The electrochromic device according to claim 1, characterized in that, The electrochromic device has a busbar at its edge; the busbar is at least partially located in the groove and forms an electrical connection with the first conductive substrate layer, and / or the busbar is at least partially located in the groove and forms an electrical connection with the second conductive substrate layer.

3. The electrochromic device according to claim 1 or 2, characterized in that, The groove includes a first groove penetrating the first conductive substrate layer and the electrochromic layer along the stacking direction, and a second groove penetrating the second conductive substrate layer and the electrochromic layer along the stacking direction; the first groove and the second groove are alternately arranged along the edge of the electrochromic device.

4. The electrochromic device according to claim 3, characterized in that, The first groove, when projected onto the plane of the electrochromic layer, has a first interior angle and a first exterior angle; the second groove, when projected onto the plane of the electrochromic layer, has a second interior angle and a second exterior angle; the radius of the first interior angle is R1, the radius of the second interior angle is R2, the radius of the first exterior angle is R3, and the radius of the second exterior angle is R4; wherein, At least one of the first outer angles, R3, is greater than the adjacent first inner angle, R1; and / or, At least one of the second outer angles, R4, is greater than the adjacent second inner angle, R2.

5. The electrochromic device according to claim 4, characterized in that, An interval region is provided between adjacent first and second grooves, and in one of the interval regions, R3 = R4 > R1 = R2; or, R3 > R4 = R1 = R2; or, R4 > R3 = R1 = R2.

6. The electrochromic device according to claim 4, characterized in that, R1, R2, R3, and R4 all satisfy the following conditions: R1≥1mm, R2≥1mm, R3≥1mm, R4≥1mm.

7. The electrochromic device according to claim 4, characterized in that, An interval area is provided between adjacent first and second grooves; The width of the first groove is W1, and in the corresponding interval region, R3 ≥ 1 / 2 W1, and / or the width of the second groove is W2, and in the corresponding interval region, R4 ≥ 1 / 2 W2.

8. The electrochromic device according to claim 7, characterized in that, The length range of W1 is 4-10mm; the length range of W2 is 4-10mm.

9. The electrochromic device according to claim 5, characterized in that, A through groove is provided at the interval area, the through groove connecting adjacent first grooves and second grooves, and the first conductive substrate layer, the electrochromic layer, and the second conductive substrate layer penetrate through the through groove; and / or, The interval region is provided with a protrusion, which separates the adjacent first groove and second groove. The first conductive substrate layer, the electrochromic layer and the second conductive substrate layer are stacked on the protrusion.

10. The electrochromic device according to claim 9, characterized in that, A gap is provided between adjacent first and second grooves, and in one of the gaps, the length between the side of the first groove near the gap and the side of the second groove near the gap is L0; wherein, The protrusion is formed in the interval region, and R3+R4≤L0.

11. An electrochromic device, characterized in that, The device includes a substrate and an electrochromic device as described in any one of claims 1-10, wherein the substrate is disposed on the side of the first conductive substrate layer opposite to the electrochromic layer; and / or, the substrate is disposed on the side of the second conductive substrate layer opposite to the electrochromic layer.

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