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 area of the electrochromic device, the grooves penetrate through the electrochromic layer and at least penetrate through one of the first conductive substrate layer and the second conductive substrate layer, and inner fillets and outer fillets are formed on orthographic projections of the grooves on the plane where the electrochromic layer is located. The inner circular bead and the outer circular bead are respectively positioned on the inner side and the outer side of the edge area of the electrochromic device; in any groove, the radius of any inner circular bead is equal to the radius of the adjacent outer circular bead; when the edge area of the electrochromic device is subjected to pressure lamination, stress can be uniformly dispersed to the inner circular bead and the outer circular bead along the inner side and the outer side of the electrochromic device, and the situation that local bearing stress is too large is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrochromic technology, and particularly provides an electrochromic device and an electrochromic apparatus. BACKGROUND

[0002] Electrochromic technology refers to a technology that causes electrochromic material to exhibit coloration or decoloration under the action of an external voltage. A device containing electrochromic material is referred to as an electrochromic device. In general, an external power supply is required to power the electrochromic device to drive the electrochromic device to exhibit coloration or decoloration, thereby causing the electrochromic device to exhibit a change in light transmittance. In recent years, electrochromic devices have been widely applied in fields such as building windows, vehicle glass, display devices, mobile terminals, and the like, and have a good market application prospect.

[0003] In the prior art, a high-pressure pressing operation is required in the manufacturing process of an electrochromic device. However, in this pressing process, the edge region of the electrochromic device often becomes a key region where stress is concentrated. When these edge regions are subjected to external pressure, the conductive base layer in the electrochromic device is prone to exhibit a situation of excessive local bearing stress, which is likely to cause cracks, thereby affecting the performance of the conductive base layer and affecting the normal color-changing effect of the electrochromic device. SUMMARY

[0004] The present application aims to provide an electrochromic device and an electrochromic apparatus, and aims to solve the problem that the edge region of the existing electrochromic device forms cracks and breaks during a high-pressure pressing operation.

[0005] To achieve the above object, the technical scheme adopted by the present application is as follows:

[0006] In a first aspect, the present application provides an electrochromic device, wherein the edge region of the electrochromic device is provided with a plurality of grooves, and the projection of the grooves in the stacking direction of the electrochromic device forms an inner fillet and an outer fillet; the inner fillet and the outer fillet are located on the inner side and the outer side of the edge region of the electrochromic device, respectively, and both the inner fillet and the outer fillet are provided as a fillet; wherein in any of the grooves, the fillet radius of any of the inner fillets is equal to the fillet radius of the adjacent outer fillet.

[0007] The application has the beneficial effects that when the groove at the edge area of the electrochromic device is subjected to pressure, the inner fillet and the outer fillet are both fillets, which can effectively disperse the pressure, reduce stress concentration at the inner fillet and the outer fillet of the groove, improve the structural strength at the inner fillet and the outer fillet, reduce the number and size of cracks, and reduce the risk of fracture of the conductive substrate layer. Moreover, the radius of the inner fillet on one side of the groove is equal to the radius of the outer fillet, and when the edge area of the electrochromic device is subjected to pressure, the stress can be evenly dispersed to the inner fillet and the outer fillet on the inner and outer sides of the electrochromic device, respectively, to avoid the case of excessive local bearing stress, further reduce the risk of increasing the number of cracks due to local stress concentration, and effectively improve the structural stability.

[0008] In some embodiments, the electrochromic device comprises a first conductive substrate layer, an electrochromic layer and a second conductive substrate layer which are sequentially stacked; the groove comprises a first groove penetrating the first conductive substrate layer and the electrochromic layer in a stacking direction, and a second groove penetrating the second conductive substrate layer and the electrochromic layer in the stacking direction; the first groove and the second groove are alternately arranged along the edge area of the electrochromic device.

[0009] By adopting the above technical solution, the conductive material is arranged at the first groove and the second groove to form alternating electrode structures, and the positive and negative electrodes of the external power supply are connected through the electrode structures, thereby facilitating electrical connection with the external power supply.

[0010] In some embodiments, a projection of the first groove in the stacking direction of the electrochromic device has a first inner fillet and a first outer fillet; a projection of the second groove in the stacking direction of the electrochromic device has a second inner fillet and a second outer fillet; the first inner fillet has a fillet radius R1, the second inner fillet has a fillet radius R2, the first outer fillet has a fillet radius R3, and the second outer fillet has a fillet radius R4; wherein R1=R3 and R2=R4.

[0011] By adopting the above technical solution, the interval area has an axisymmetric structure, which is beneficial to stress dispersion and has good structural stability.

[0012] In some embodiments, an interval area is formed between adjacent first grooves and second grooves, and in one interval area, R1=R2.

[0013] By adopting the above technical solution, the stress at the interval area can be evenly dispersed to the four corners, the stress dispersion effect is better, and the product reliability is effectively improved.

[0014] In some embodiments, the fillet of the inner fillet, the outer fillet, the first inner fillet and the first outer fillet are tangent.

[0015] By adopting the technical scheme, the proportion of the first inner fillet and the first outer fillet on the corresponding side edge is maximized, and the stress dispersion effect is improved.

[0016] In some embodiments, the fillet of the inner fillet, the outer fillet, the second inner fillet, and the fillet of the second outer fillet are tangent.

[0017] By adopting the technical scheme, the proportion of the second inner fillet and the second outer fillet on the corresponding side edge is maximized, and the stress dispersion effect is improved.

[0018] In some embodiments, R1, R2, R3, and R4 satisfy the following conditions: R1≥1mm, R2≥1mm, R3≥1mm, and R4≥1mm.

[0019] By adopting the technical scheme, the structural strength of the electrochromic device at the first inner fillet, the second inner fillet, the first outer fillet, and the second outer fillet is effectively improved, and the structural reliability is improved.

[0020] In some embodiments, the width of the first groove is W1, the first inner fillet and the first outer fillet are tangent, and the tangent is parallel to the width direction of the corresponding interval area,

[0021] By adopting the technical scheme, R1 and R2 reach the maximum value, and the structural strength is effectively improved.

[0022] In some embodiments, the second inner fillet and the second outer fillet are tangent, and the tangent is parallel to the width direction of the corresponding interval area; in the corresponding interval area,

[0023] By adopting the technical scheme, R3 and R4 reach the maximum value, and the structural strength is effectively improved.

[0024] In some embodiments,

[0025] In some embodiments, the interval area has an axisymmetric structure, and the stress dispersion is more uniform.

[0026] In some embodiments, the length of W1 ranges from 4mm to 10mm, and the length of W2 ranges from 4mm to 10mm.

[0027] In some embodiments, the interval area is a through groove, the through groove connects the adjacent first groove and the second groove, and the first conductive substrate layer, the electrochromic layer, and the second conductive substrate layer penetrate the through groove.

[0028] In some embodiments, the spacing region is a protrusion separating the adjacent first groove and second groove, and the first conductive substrate layer, the electrochromic layer and the second conductive substrate layer are stacked at the protrusion.

[0029] By adopting the technical scheme, the spacing region has two forms, one of which is provided with a through groove connecting the adjacent first groove and second groove, and the other of which is formed with a protrusion separating the adjacent first groove and second groove. The electrochromic device can include only one form of spacing region, or both forms of spacing region.

[0030] In a second aspect, the embodiments of the present application provide an electrochromic device, comprising the electrochromic device and a substrate, wherein the substrate is arranged on a side of the first conductive substrate layer away from the electrochromic layer, and / or the substrate is arranged on a side of the second conductive substrate layer away from the electrochromic layer. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0032] Figure 1 A schematic view of the top structure of the electrochromic device provided by an embodiment of the present application is shown in the figure.

[0033] Figure 2 A schematic view of the structure of the partial peripheral edge region of the electrochromic device provided by an embodiment of the present application is shown in the figure.

[0034] Figure 3 A schematic view of the cross-sectional structure of the electrochromic device provided by another embodiment of the present application in the stacking direction is shown in the figure, wherein the spacing region is a through groove.

[0035] Figure 4 A schematic view of the cross-sectional structure of the electrochromic device provided by another embodiment of the present application in the stacking direction is shown in the figure, wherein the spacing region is a protrusion.

[0036] Figure 5 A schematic view of the structure of the electrochromic device provided by an embodiment of the present application at a spacing region is shown in the figure, wherein, the spacing region is a through groove.

[0037] Figure 6A structural schematic view of an electrochromic device at a spacing region according to another embodiment of the present application, wherein R1=R2=R3=R4, and the spacing region is a through slot;

[0038] Figure 7 A structural schematic view of an electrochromic device at a spacing region according to an embodiment of the present application, wherein R1=R2=R3=R4, and the spacing region is a convex part;

[0039] Figure 8 A structural schematic view of an electrochromic device at a spacing region according to an embodiment of the present application, wherein, and the spacing region is a convex part;

[0040] Figure 9 A structural schematic view of a cross section of an electrochromic device at a spacing region in a stacking direction according to an embodiment of the present application, wherein the spacing region is a through slot;

[0041] Figure 10 A structural schematic view of a cross section of an electrochromic device at a spacing region in a stacking direction according to an embodiment of the present application, wherein the spacing region is a convex part;

[0042] Figure 11 A comparison diagram of cracks formed by the splitting phenomenon of different forms of inner fillets and outer fillets of an electrochromic device according to another embodiment of the present application.

[0043] In the drawings,

[0044] 1000, an electrochromic device;

[0045] 100, a first conductive substrate layer; 110, a first substrate layer; 120, a first conductive layer;

[0046] 200, an electrochromic layer; 201, a first bottom side; 202, a second bottom side;

[0047] 300, a second conductive substrate layer; 310, a second substrate layer; 320, a second conductive layer;

[0048] 400, a groove; 410, a first groove; 420, a second groove;

[0049] 411, a first side; 421, a second side, 412, a third side; 422, a fourth side;

[0050] 500, an inner fillet; 510, a first inner fillet; 520, a second inner fillet;

[0051] 600, an outer fillet; 610, a first outer fillet; 620, a second outer fillet;

[0052] 700, interval; 710, through slot; 720, protrusion;

[0053] 800, bus bar; 810, first bus bar; 820, second bus bar;

[0054] 900, insulating glue; 910, first insulating glue; 920, second insulating glue; 930, third insulating glue. DETAILED DESCRIPTION

[0055] Embodiments of the present application are described below in detail with reference to the accompanying drawings, in which the same or similar components have the same or similar designations and functions throughout the several views. The embodiments described below are exemplary, and are intended to explain the present application, and are not to be understood as limiting the present application.

[0056] In the description of the present application, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are terms of reference and are used for the purpose of ease of description of the application and simplification of the description, and are not to be understood as indicating or implying that a device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0057] In addition, the terms "first", "second", "third", etc. are used only for the purpose of description, and are not to be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0058] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] In this application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present application. The illustrative representations in this specification are not necessarily drawn to the same embodiment or example. Moreover, the described specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the described different embodiments or examples and features in different embodiments or examples can be combined and combined, without contradiction, by those skilled in the art.

[0060] In the prior art, high pressure pressing operation is required in the manufacturing process of the electrochromic device. However, in this pressing process, the edge area of the electrochromic device often becomes a key area of stress concentration. When these edge areas are subjected to external pressure, the conductive base layer in the electrochromic device is prone to have a local load stress that is too large, which is prone to cause cracks, and then cause the phenomenon of cracking, thereby affecting the performance of the conductive base layer, which is specifically manifested as a significant increase in the local resistance of the conductive base layer, affecting the normal color change effect of the electrochromic device.

[0061] Therefore, in order to solve the above problems, the present application designs an electrochromic device, the edge area of which is provided with a groove, and the groove is provided with an inner fillet and an outer fillet. When the groove is subjected to pressure, the stress can be effectively dispersed, the stress concentration at the inner fillet and the outer fillet is reduced, the structural strength at the inner fillet and the outer fillet is improved, the number and size of cracks are reduced, and the risk of fracture of the conductive base layer is reduced. Moreover, the radius of the inner fillet on the same side of the groove is equal to the radius of the outer fillet. When the edge area of the electrochromic device is subjected to pressure and pressing, the stress can be evenly dispersed to the inner fillet and the outer fillet on the inner and outer sides of the electrochromic device, respectively, to avoid the case of local load stress being too large, further reducing the risk of increasing the number of cracks due to local stress concentration, and effectively improving the structural stability.

[0062] Reference Figures 1 to 8 The first aspect of the embodiment of the present application provides an electrochromic device 1000, the edge area of the electrochromic device 1000 is provided with a plurality of grooves 400, the grooves 400 have an inner fillet 500 and an outer fillet 600 in the orthographic projection on the plane where the electrochromic layer 200 is located, and the inner fillet 500 and the outer fillet 600 are located on the inner side and the outer side of the edge area of the electrochromic device 1000, respectively; in the groove 400, the radius of any inner fillet 500 is equal to the radius of the adjacent outer fillet 600. It should be noted that the radius of the fillet is the radius of the circle on which the arc of the fillet is located.

[0063] Specifically, referring to Figure 3、 Figure 4 The electrochromic device 1000 comprises a first conductive substrate layer 100, an electrochromic layer 200 and a second conductive substrate layer 300 which are sequentially stacked; the groove 400 penetrates the electrochromic layer 200, and at least one of the first conductive substrate layer 100 and the second conductive substrate layer 300. In the embodiment of the present application, the edge area of the electrochromic device 1000 is provided with a plurality of grooves 400, which can be formed by etching or engraving process. The groove 400 comprises a first groove 410 which 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 which penetrates the second conductive substrate layer 300 and the electrochromic layer 200 along the stacking direction.

[0064] A plurality of first grooves 410 and second grooves 420 are arranged alternately in the edge area of the electrochromic device 1000. In the embodiment, at least one first groove 410 and at least one second groove 420 are provided on any side of the edge area of the electrochromic device 1000. The number of the first grooves 410 and the second grooves 420 is multiple, which can be any number greater than two, and can be set according to actual conditions.

[0065] Reference Figure 2 、 Figures 5 to 8 Any one of the grooves 400 forms an inner fillet 500 and an outer fillet 600 on the orthographic projection in the plane of the electrochromic layer 200, and the inner fillet 500 and the outer fillet 600 are located on the inner side and the outer side of the edge area of the electrochromic device 1000 respectively; the radius of the inner fillet 500 is set to be equal to the radius of the adjacent outer fillet 600. A single groove 400 has a side edge connecting between the inner side and the outer side of the edge area of the electrochromic device 1000, and the adjacent inner fillet 500 and outer fillet 600 are located at the two ends of the same side edge.

[0066] Reference Figure 1 、 Figure 11 In the manufacturing process of the electrochromic device 1000, high-pressure pressing operation is required, and in this pressing process, the edge area of the electrochromic device 1000 often becomes a key area where stress is concentrated. When the edge area of the electrochromic device 1000 is subjected to external pressure, the electrochromic device 1000 is prone to crack at the inner fillet 500 and the outer fillet 600, and then the cracking phenomenon occurs, thereby affecting the performance of the corresponding conductive substrate layer, which is specifically manifested as a significant increase in the local resistance of the conductive substrate layer. When the cracking condition deteriorates to a certain extent, the electrochromic layer 200 may also crack and the electrolyte may be separated, resulting in short circuit of the electrochromic device 1000.

[0067] The application sets a groove at the edge area of the electrochromic device, and the groove is provided with an inner fillet 500 and an outer fillet 600. When the groove 400 is subjected to pressure, the fillets can effectively disperse the pressure, reduce stress concentration at the inner fillet 500 and the outer fillet 600, improve the structural strength at the inner fillet 500 and the outer fillet 600, reduce the number and size of cracks, and reduce the risk of fracture of the conductive substrate layer. In addition, the radius of the inner fillet 500 on the same side of the groove 400 is equal to the radius of the outer fillet 600. When the edge area of the electrochromic device 1000 is subjected to pressure and splicing, the stress can be evenly dispersed to the inner fillet 500 and the outer fillet 600 on the inner and outer sides of the electrochromic device 1000, respectively, to avoid the case of excessive local bearing stress, thereby reducing the risk of increasing the number of cracks due to local stress concentration and effectively improving the structural stability.

[0068] Reference Figure 3 , Figure 4 , Figure 9 and Figure 10 In some embodiments, the electrochromic device 1000 includes a first conductive substrate layer 100, an electrochromic layer 200, and a second conductive substrate layer 300 arranged in sequence; the groove 400 includes a first groove 410 penetrating the first conductive substrate layer 100 and the electrochromic layer 200 in the stacking direction of the electrochromic device 1000; and a second groove 420 penetrating the second conductive substrate layer 300 and the electrochromic layer 200 in the stacking direction; the first groove 410 and the second groove 420 are arranged alternately along the edge area of the electrochromic device 1000, and a spacing area 700 is provided between adjacent first grooves 410 and second grooves 420.

[0069] 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, so that the electrochromic layer 200 is not exposed outside the electrochromic device 1000, and the electrochromic layer 200 is effectively protected. The electrochromic layer 200 is made of electrochromic material and can undergo stable and reversible color change under the action of an external electric field; the electrochromic layer 200 forms a color-changing area.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] refer to Figure 3 and Figure 4 Specifically, multiple first grooves 410 are distributed at intervals on the edge region of the electrochromic device, 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, a plurality of second grooves 420 are arranged at intervals in the edge region of the electrochromic device, and each of the second grooves 420 is located on the side of the first conductive layer 120 away from the first base layer 110. It should be noted that the second grooves 420 are formed by etching or engraving the second base layer 310, the second conductive layer 320, and the electrochromic layer 200.

[0075] Further, referring to Figure 9 and Figure 10 , the electrochromic device 1000 is provided with bus bars 800 on both sides in the stacking direction, and the bus bar 800 on one side is at least partially electrically connected to the second conductive layer 320 through the plurality of first grooves 410; the bus bar 800 on the other side is at least partially electrically connected to the first conductive layer 120 through the plurality of second grooves 420. Exemplarily, the bus bar 800 can include but is not limited to conductive copper foil, conductive adhesive, and conductive resin and other conductive materials, so that a multi-electrode structure can be formed in the edge region of the electrochromic device 1000, and the color changing speed of the electrochromic device 1000 can be accelerated.

[0076] It can be understood that by alternately arranging the first grooves 410 and the second grooves 420 in the edge region of the electrochromic device 1000, an alternating electrode structure is formed, and the bus bars 800 are connected at the first grooves 410 and the second grooves 420, respectively, and the positive and negative electrodes of the external power supply are connected through the bus bars 800, and an electrical conduction is formed with the external power supply; since the first grooves 410 and the second grooves 420 are arranged alternately, the color changing speed of the electrochromic device 1000 is effectively improved.

[0077] In some embodiments, referring to Figure 3 and Figure 9 , a spacing region 700 is provided between adjacent first grooves 410 and second grooves 420, and the spacing region 700 is a through groove 710. Specifically, along the stacking direction of the electrochromic device 1000, the spacing region between adjacent alternating first grooves 410 and second grooves 420 forms a through groove 710 in a through structure, the through groove 710 connects the adjacent first grooves 410 and the second grooves 420, and the first conductive base layer 100, the electrochromic layer 200, and the second conductive base layer 300 pass through the through groove.

[0078] In the embodiment, a plurality of through grooves 710 are arranged at the edge area of the electrochromic device 1000, the depth of the through grooves 710 is greater than the depth of the first grooves 410 and the second grooves 420, and the through grooves 710 penetrate the first 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 the edge area of the electrochromic device 1000, and the two ends of the through grooves 710 are respectively communicated with the adjacent first grooves 410 and second grooves 420. The number of the through grooves 710 can be two or any number of more than two, which can be specifically set according to the actual situation.

[0079] It can be understood that in the embodiment, the thickness of the electrochromic device 1000 at the position of the through groove 710 is small, so that the pressure received by the electrochromic device 1000 corresponding to the through groove 710 is also relatively small compared with the first groove 410 and the second groove 420. In addition, since the through groove 710 does not have the electrochromic layer 200, the electrolyte substance in the electrochromic layer 200 will not be precipitated to form a conductor to connect the first conductive layer 120 and the second conductive layer 320, that is, there is no substance to be connected and short-circuited, which can effectively prevent the chemical short circuit of the edge area of the electrochromic device 1000 due to extrusion, solve the problem of local short circuit of the electrochromic device 1000 during extrusion, and ensure the stability of the device.

[0080] In other embodiments, referring to Figure 4 and Figure 10 , the interval area 700 between the adjacent first grooves 410 and the second grooves 420 is provided with a convex portion 720. Specifically, along the stacking direction of the electrochromic device 1000, the interval area between the adjacent and alternating first grooves 410 and the second grooves 420 forms a convex structure of the convex portion 720, the convex portion 720 separates the adjacent first grooves 410 and the 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 convex portion 720.

[0081] In the above embodiments of the present application, the interval area between the adjacent first grooves 410 and the second grooves 420 at the edge area of the electrochromic device 1000 includes the through groove 710 in the through structure and / or the convex portion 720 in the convex structure.

[0082] Referring to Figure 1, the first groove 410 and the second groove 420 are arranged along the circumferential direction of the electrochromic device 1000, and the length of the direction along which they are arranged is the length of the first groove 410 and the second groove 420. In other words, the length direction of the first groove 410 on any side of the electrochromic device 1000 corresponds to the length direction of the side of the electrochromic device 1000; the length of the second groove 420 on any side of the electrochromic device 1000 corresponds to the length direction of the side of the electrochromic device 1000.

[0083] Specifically, referring to Figures 3 to 8 , the 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 and the like, and the side of the first groove 410 close to the spacing area 700 has a side edge connecting between the inner side and the outer side of the edge area 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 and the like, and the side of the second groove 420 close to the spacing area 700 has a side edge connecting between the inner side and the outer side of the edge area of the electrochromic device 1000. Wherein, 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.

[0084] In some embodiments, referring to Figure 5 and Figure 6 , the first groove 410 and the second groove 420 are arranged along the length direction of the side of the electrochromic device 1000, and the spacing area 700 between the first groove 410 and the second groove 420 is a through groove 710, and the first conductive substrate layer 100, the electrochromic layer 200 and the second conductive substrate layer 300 penetrate the through groove 710. The side edge of the first groove 410 close to the spacing area 700 is the first side edge 411, and the side edge of the second groove 420 close to the spacing area 700 is the second side edge 421.

[0085] Referring to Figure 5 , for example, on the orthographic projection of the plane where the electrochromic layer 200 is located, the part of the first side edge 411 close to the inner side of the electrochromic device 1000 and the part of the second side edge 421 close to the inner side of the electrochromic device 1000 are connected to each other, which can be intersecting at a point; thus, the first side edge 411 and the second side edge 421 are connected to each other to form a semi-open area, and the open port of the area is towards the outer side of the electrochromic device 1000.

[0086] Referring to Figure 6, the electrochromic layer 200 forms a first bottom edge 201 near the side edge of the interval region 700, specifically, the first side edge 411 and the second side edge 421 each have two opposite ends, wherein, in the orthographic projection of the plane where the electrochromic layer 200 is located, the first side edge 411 is connected to the first bottom edge 201 near one end of the inner side of the electrochromic device 1000, and at the same time, the second side edge 421 is connected to the first bottom edge 201 near one end of the inner side of the electrochromic device 1000. Thus, the first side edge 411, the first bottom edge 201 and the second side edge 421 are connected to each other to form a semi-open area, and the open port of the area is towards the outer side of the electrochromic device 1000.

[0087] In some embodiments, referring to Figure 7 and Figure 8 , the first groove 410 and the second groove 420 are arranged along the length direction of one side of the electrochromic device 1000, the interval region 700 between the first groove 410 and the second groove 420 is a convex portion 720, and the first conductive substrate layer 100, the electrochromic layer 200 and the second conductive substrate layer 300 are laminated at the convex portion 720. The side edge of the first groove 410 near the interval region 700 is a third side edge 412, and the side edge of the second groove 420 near the interval region 700 is a fourth side edge 422.

[0088] Referring to Figure 7 , the electrochromic layer 200 forms a second bottom edge 202 near the side edge of the interval region 700, and the second bottom edge 202 is located outside the edge region of the electrochromic device 1000; the third side edge 412 and the fourth side edge 422 each have two opposite ends, wherein, in the orthographic projection of the plane where the electrochromic layer 200 is located, the third side edge 412 is connected to the second bottom edge 202 near one end of the outer side of the electrochromic device 1000, and at the same time, the fourth side edge 422 is connected to the second bottom edge 202 near one end of the outer side of the electrochromic device 1000. Thus, the third side edge 412, the second bottom edge 202 and the fourth side edge 422 are connected to each other to form a semi-open area, and the open port of the area is towards the inner side of the electrochromic device 1000.

[0089] Referring to Figure 8 , the electrochromic layer 200 forms a second bottom edge 202 near the side edge of the interval region 700, and the second bottom edge 202 is located outside the edge region of the electrochromic device 1000; the third side edge 412 and the fourth side edge 422 each have two opposite ends, wherein, in the orthographic projection of the plane where the electrochromic layer 200 is located, the third side edge 412 is connected to the second bottom edge 202 near one end of the outer side of the electrochromic device 1000, and at the same time, the fourth side edge 422 is connected to the second bottom edge 202 near one end of the outer side of the electrochromic device 1000. Thus, the third side edge 412, the second bottom edge 202 and the fourth side edge 422 are connected to each other to form a semi-open area, and the open port of the area is towards the inner side of the electrochromic device 1000.

[0090] Referring to Figure 2 , Figures 5 to 8In some embodiments, the first recess 410 has a first inner fillet 510 and a first outer fillet 610 in the orthographic projection of the plane where the electrochromic layer 200 is located, and the second recess 420 has a second inner fillet 520 and a second outer fillet 620 in the orthographic projection of the plane where the electrochromic layer 200 is located; the radius of the first inner fillet 510 is R1, the radius of the second inner fillet 520 is R2, the radius of the first outer fillet 610 is R3, and the radius of the second outer fillet 620 is R4.

[0091] In some embodiments, R1 = R3.

[0092] Exemplarily, referring to Figure 5 and Figure 6 , the spacing region 700 is a through slot 710, the first inner fillet 510 and the first outer fillet 610 are located at the inner side and the outer side of the spacing region 700 respectively, and the first recess 410 has a first side edge 411 close to the side edge of the spacing region 700, the first side edge 411 has two opposite ends, one end of the first side edge 411 close to the inner side of the electrochromic device 1000 has the first inner fillet 510, and the other end of the first side edge 411 close to the outer side of the electrochromic device 1000 has the first outer fillet 610. In some embodiments, referring to Figure 5 , in the orthographic projection of the plane where the electrochromic layer 200 is located, the first inner fillet 510 is formed by the intersection of the first side edge 411 and the inner edge of the second recess 420, the inner edge of the second recess 420 extends along the length direction of one side of the electrochromic device 1000, and the first outer fillet 610 is connected between the first side edge 411 and the periphery of the electrochromic device 1000. In yet some embodiments, referring to Figure 6 , in the orthographic projection of the plane where the electrochromic layer 200 is located, the first inner fillet 510 is connected between the first side edge 411 and the first bottom edge 201, and the first outer fillet 610 is connected between the first side edge 411 and the periphery of the electrochromic device 1000.

[0093] By setting R1 of the adjacent first inner fillet 510 on the first side edge 411 equal to R3 of the adjacent first outer fillet 610, the first recess 410 can bear and disperse stress of the same size at the first inner fillet 510 and the first outer fillet 610, so that the stress can be evenly dispersed to the inner and outer sides along the first side edge 411; in the case of uniform stress dispersion, the situation of excessive local stress bearing is avoided, thereby reducing the risk of increasing the number of cracks caused by local stress concentration and effectively improving the structural stability.

[0094] Optionally, referring to Figure 7 and Figure 8The spacing region 700 is a convex portion 720, the first inner fillet 510 and the first outer fillet 610 are located at the inner side and the outer side of the spacing region 700 respectively, and the first groove 410 is close to a third side edge 412 of the spacing region 700; the third side edge 412 has two opposite ends, one end of the third side edge 412 close to the inner side of the electrochromic device 1000 has the first inner fillet 510, and the other end of the third side edge 412 close to the outer side of the electrochromic device 1000 has the first outer fillet 610. In some embodiments, referring to Figure 7 In the orthographic projection on the plane where the electrochromic layer 200 is located, the first inner fillet 510 is connected between the third side edge 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; and the first outer fillet 610 is connected between the third side edge 412 and the second bottom edge 202. In some other embodiments, referring to Figure 8 In the orthographic projection on the plane where the electrochromic layer 200 is located, the first inner fillet 510 is connected between the third side edge 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; and the first outer fillet 610 is connected between the third side edge 412 and the periphery of the electrochromic device 1000.

[0095] By setting R1 of the first inner fillet 510 adjacent to each other on the third side edge 412 equal to R3 of the first outer fillet 610 adjacent to each other, the first groove 410 can bear and disperse a stress of a comparable size at the first inner fillet 510 and the first outer fillet 610, so that the stress can be evenly dispersed to the inner and outer sides along the third side edge 412; in the case of uniform stress dispersion, the situation of excessive local stress bearing is avoided, thereby reducing the risk of increasing the number of cracks caused by local stress concentration and effectively improving the structural stability.

[0096] In some other embodiments, R2 = R4.

[0097] Exemplarily, referring to 5 and Figure 6 The spacing region 700 is a through groove 710, the second inner fillet 520 and the second outer fillet 620 are located at the inner side and the outer side of the spacing region 700 respectively, the second groove 420 is close to a second side edge 421 of the spacing region 700, the second side edge 421 has two opposite ends, one end of the second side edge 421 close to the inner side of the electrochromic device 1000 has the second inner fillet 520, and the other end of the second side edge 421 close to the outer side of the electrochromic device 1000 has the second outer fillet 620. In some embodiments, referring to Figure 5In the orthographic projection of the plane where the electrochromic layer 200 is located, the second inner fillet 520 is connected between the second side edge 421 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 second outer fillet 620 is connected between the second side edge 421 and the periphery of the electrochromic device 1000. In some other embodiments, referring to Figure 6 In the orthographic projection of the plane where the electrochromic layer 200 is located, the second inner fillet 520 is connected between the second side edge 421 and the second bottom edge 201, and the second outer fillet 620 is connected between the second side edge 421 and the periphery of the electrochromic device 1000.

[0098] By setting R2 of the second inner fillet 520 adjacent to each other on the second side edge 421 equal to R4 of the second outer fillet 620 adjacent to each other, the second groove 420 can bear and disperse a considerable amount of stress at the second inner fillet 520 and the second outer fillet 620, so that the stress can be evenly dispersed to the inside and outside along the second side edge 421; in the case of uniform stress dispersion, the situation of excessive local stress bearing is avoided, thereby reducing the risk of increasing the number of cracks caused by local stress concentration and effectively improving the structural stability.

[0099] Optionally, referring to Figure 7 and Figure 8 The spacing area 700 is a convex part 720, the second inner fillet 520 and the second outer fillet 620 are located on the inner side and the outer side of the spacing area 700 respectively, the side edge of the second groove 420 close to the spacing area 700 is a fourth side edge 422, the fourth side edge 422 has two opposite ends, one end of the fourth side edge 422 close to the inner side of the electrochromic device 1000 has the second inner fillet 520, and the other end of the fourth side edge 422 close to the outer side of the electrochromic device 1000 has the second outer fillet 620. In some embodiments, referring to Figure 7 In the orthographic projection of the plane where the electrochromic layer 200 is located, the second inner fillet 520 is connected between the fourth side edge 422 and the inner edge of 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 second outer fillet 620 is formed by the intersection of the fourth side edge 422 and the second bottom edge 202. In some other embodiments, referring to Figure 8 In the orthographic projection of the plane where the electrochromic layer 200 is located, the second inner fillet 520 is connected between the fourth side edge 422 and the inner edge of 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 second outer fillet 620 is connected between the fourth side edge 422 and the periphery of the electrochromic device 1000.

[0100] By setting R2 of the adjacent second inner fillet 520 on the fourth side edge 422 equal to R4 of the adjacent second outer fillet 620, the second groove 420 can bear and disperse a considerable amount of stress at the second inner fillet 520 and the second outer fillet 620, so that the stress can be evenly dispersed to the inner and outer sides along the fourth side edge 422; in the case of uniform stress dispersion, the situation of excessive local stress bearing is avoided, thereby reducing the risk of increasing the number of cracks caused by local stress concentration, and effectively improving the structural stability.

[0101] Reference Figures 5 to 8 In some embodiments, in one interval region 700, R1 = R3 = R2 = R4.

[0102] Understandably, in the interval region 700, the radii of the first inner fillet 510, the second inner fillet 520, the first outer fillet 610, and the second outer fillet 620 are all equal, that is, the interval region 700 is an axisymmetric structure, which has better structural stability; the stress received at the interval region 700 can be evenly dispersed to the four corners, and the stress dispersion effect is better, effectively improving the product reliability.

[0103] In some embodiments, R1, R2, R3, and R4 all satisfy the following conditions: R1≥1mm, R2≥1mm, R3≥1mm, R4≥1mm; Understandably, the larger the radius of any inner fillet 500 or outer fillet 600 is set, the better the stress dispersion effect is under the same stress; Furthermore, the present application sets the size of R1, R2, R3, and R4 to a greater extent, effectively improving the structural strength of the electrochromic device 1000 at the first inner fillet 510, the second inner fillet 520, the first outer fillet 610, and the second outer fillet 620, and improving the structural reliability.

[0104] Reference Figure 5 And Figure 8 In some embodiments, the first inner fillet 510 and the first outer fillet 610 are tangent.

[0105] Understandably, under the premise of R1 = R3, in the orthographic projection on the plane where the electrochromic layer 200 is located, the edge zone line of the first inner fillet 510 and the edge zone line of the first outer fillet 610 are tangent, that is, the edge zone line of the first inner fillet 510 and the edge zone line of the first outer fillet 610 intersect at a point, so that the proportion of the first inner fillet 510 and the first outer fillet 610 on the corresponding side edge is 1 / 2, and the proportion of the first inner fillet 510 and the first outer fillet 610 on the corresponding side edge reaches the maximum value, which greatly increases the structural strength of the first inner fillet 510 and the first outer fillet 610; and the stress received on the side edge can be dispersed to the first inner fillet 510 and the first outer fillet 610 on both sides, respectively, improving the stress dispersion effect.

[0106] Reference Figure 5 and Figure 8 In some embodiments, the second inner fillet 520 and the second outer fillet 620 are tangent. Here, the first inner fillet 520 and the second outer fillet 620 being tangent means that the arc of the fillet of the first inner fillet 520 is tangent to the arc of the fillet of the second outer fillet 620.

[0107] It can be understood that, under the premise of R2=R4, the edge zone line of the second inner fillet 520 and the edge zone line of the second outer fillet 620 are tangent on the orthographic projection of the plane where the electrochromic layer 200 is located, that is, the edge zone line of the second inner fillet 520 and the edge zone line of the second outer fillet 620 intersect at a point, so that the proportion of the second inner fillet 520 and the second outer fillet 620 on the corresponding side is 1 / 2, and the proportion of the second inner fillet 520 and the second outer fillet 620 on the corresponding side reaches the maximum value, which greatly increases the structural strength of the second inner fillet 520 and the second outer fillet 620; and the stress on the side can be dispersed to the second inner fillet 520 and the second outer fillet 620 on both sides respectively, improving the stress dispersion effect.

[0108] Reference Figure 5 and Figure 8 In some embodiments, the width of the first groove 410 is W1, the first inner fillet 510 and the first outer fillet 610 are tangent and the tangent is parallel to the width direction of the corresponding spacing area 700,

[0109] Specifically, the width direction of the spacing area 700 is perpendicular to the length direction of the corresponding side of the electrochromic device 1000, and the width direction of the first groove 410 is perpendicular to the length direction of the side of the electrochromic device 1000. In this embodiment, the sum of the radius of the first inner fillet 510 and the radius of the first outer fillet 610 is equal to the width of the first groove 410 near the spacing area 700, and under the premise of R1=R2, the radius of the first inner fillet 510 and the radius of the first outer fillet 610 can both reach the maximum value, which maximally increases the structural strength of the first inner fillet 510 and the first outer fillet 610 and improves the stress dispersion effect.

[0110] Reference Figure 5 and Figure 8 In some embodiments, the width of the second groove 420 is W2; the second inner fillet 520 and the second outer fillet 620 are tangent and the tangent is parallel to the width direction of the corresponding spacing area 700,

[0111] Specifically, the width direction of the interval region 700 is perpendicular to the length direction of the side of the electrochromic device 1000 corresponding to the interval region 700, and the width direction of the first groove 410 is perpendicular to the length direction of the side of the electrochromic device 1000 corresponding to the first groove 410. In this embodiment, the sum of the radius of the second inner fillet 520 and the radius of the second outer fillet 620 is equal to the width of the second groove 420 close to the interval region 700, and under the premise of R3 = R4, the radius of the second inner fillet 520 and the radius of the second outer fillet 620 can reach the maximum value, thereby maximizing the structural strength of the second inner fillet 520 and the second outer fillet 620 and improving the stress dispersion effect.

[0112] In some embodiments,

[0113] It can be understood that in the interval region 700, the radius of the first inner fillet 510, the second inner fillet 520, the first outer fillet 610, and the second outer fillet 620 are equal, and W1 = W2; that is, the interval region 700 has an axisymmetric structure, which is beneficial to uniform stress dispersion. In this embodiment, the tangent line of the first inner fillet 510 and the first outer fillet 610 is parallel to the central axis of the interval region 700, and the width direction of the first groove 410 is parallel to the central axis of the interval region 700; the tangent line of the second inner fillet 520 and the second outer fillet 620 is parallel to the central axis of the interval region 700, and the width direction of the second groove 420 is parallel to the central axis of the interval region 700.

[0114] And the radius values of the first inner fillet 510, the second inner fillet 520, the first outer fillet 610, and the second outer fillet 620 all reach the maximum value that can be designed, thereby maximizing the structural strength of the first inner fillet 510, the first outer fillet 610, the second inner fillet 520, and the second outer fillet 620, enabling the first inner fillet 510, the first outer fillet 610, the second inner fillet 520, and the second outer fillet 620 to bear greater stress, and improving the structural stability, thereby effectively reducing the number and size of cracks at the edge region of the electrochromic device 1000.

[0115] In some embodiments, the length of W1 ranges from 4 mm to 10 mm. Specifically, the length of W1 can be in any length range of 4 mm-5 mm, 5 mm-6 mm, 6 mm-7 mm, 7 mm-8 mm, 8 mm-9 mm, or 9 mm-10 mm.

[0116] In some embodiments, the length of W2 ranges from 4 mm to 10 mm. Specifically, the length of W2 can be in any length range of 4 mm-5 mm, 5 mm-6 mm, 6 mm-7 mm, 7 mm-8 mm, 8 mm-9 mm, or 9 mm-10 mm.

[0117] Further, with reference to Figure 9and Figure 10 In some embodiments, the electrochromic device 1000 can further comprise an insulating adhesive 900, which comprises a first insulating adhesive 910 and a second insulating adhesive 920. The first insulating adhesive 910 can be disposed on the first substrate layer 110 and located on the side of the first substrate layer 110 away from the electrochromic layer 200, and the second insulating adhesive 920 can be disposed on the second substrate layer 310 and located on the side of the second substrate layer 310 away from the electrochromic layer 200. Thus, the insulating adhesive 900 can be stably bonded to the substrate layer.

[0118] In some embodiments, the first insulating adhesive 910 can at least partially cover the first groove 410, and the second insulating adhesive 920 can at least partially cover the second groove 420. Thus, a part of the insulating adhesive is bonded to the substrate layer, and a part of the insulating adhesive is bonded to the exposed conductive layer at the groove site, which can form a reinforcing effect on the groove edge and prevent interlayer peeling and other situations from occurring at the groove edge.

[0119] In other embodiments, the first insulating adhesive 910 at least partially covers the first bus bar 810 and at least partially covers the first groove 410, and the second insulating adhesive 920 at least partially covers the second bus bar 820 and at least partially covers the second groove 420. Thus, by covering the insulating adhesive to the bus bar, the interlayer bonding force of the device can be improved.

[0120] Reference Figure 9 In some embodiments, the insulating adhesive 900 further comprises a third insulating adhesive 930, a part of the third insulating adhesive 930 is bonded to the first substrate layer 110, and a part of the third insulating adhesive 930 is bonded to the second conductive layer 320 exposed in the first groove 410; the first bus bar 810 at least partially covers the third insulating adhesive 930; the third insulating adhesive 930 is used to isolate the first bus bar 810 and the second bus bar 820 at the through groove 710, prevent the first bus bar 810 and the second bus bar 820 at the through groove 710 from forming a conduction and thus causing a short circuit, and improve the product reliability.

[0121] In yet other embodiments, the insulating adhesive 900 further comprises a third insulating adhesive 930, a part of the third insulating adhesive 930 is bonded to the second substrate layer 310, and a part of the third insulating adhesive 930 is bonded to the first conductive layer 120 exposed in the second groove 420; the second bus bar 820 at least partially covers the third insulating adhesive 930; the third insulating adhesive 930 is used to isolate the first bus bar 810 and the second bus bar 820 at the through groove 710, prevent the first bus bar 810 and the second bus bar 820 at the through groove 710 from forming a conduction and thus causing a short circuit, and improve the product reliability.

[0122] The second aspect of the embodiments of the present application provides an electrochromic device (not shown), comprising a substrate and the electrochromic device 1000, the substrate is arranged on the side of the first conductive substrate layer 100 away from the electrochromic layer 200; and / or, the substrate is arranged on the side of the second conductive substrate layer 300 away from the electrochromic layer 200.

[0123] Specifically, the electrochromic device 1000 is provided with a substrate on both sides in the thickness direction, and the substrate has light transmittance, preferably glass.

[0124] It can be 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 repeated here.

[0125] The embodiments of the present application also provide an electrochromic product, comprising the electrochromic device 1000 or the electrochromic device described above. The electrochromic product comprises any one of the automobile sunroof, the automobile side window, the automobile windshield and the building door and window.

[0126] The above are only the preferred embodiments of the present application, and are not used to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An electrochromic device, characterized in that, The edge region of the electrochromic device is provided with a plurality of grooves, and the projection of the grooves on the stacking direction of the electrochromic device has inner and outer rounded corners; the inner and outer rounded corners are respectively located on the inner and outer sides of the edge region of the electrochromic device; wherein... In any of the grooves, the radius of any of the inner fillets is equal to the radius of the adjacent outer fillets.

2. The electrochromic device according to claim 1, characterized in that, The electrochromic device includes a first conductive substrate layer, an electrochromic layer, and a second conductive substrate layer stacked sequentially; 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 region of the electrochromic device.

3. The electrochromic device according to claim 2, characterized in that, The projection of the first groove onto the stacking direction of the electrochromic device has a first inner rounded corner and a first outer rounded corner; the projection of the second groove onto the stacking direction of the electrochromic device has a second inner rounded corner and a second outer rounded corner; the radius of the first inner rounded corner is R1, the radius of the second inner rounded corner is R2, the radius of the first outer rounded corner is R3, and the radius of the second outer rounded corner is R4; wherein, R1 = R3, R2 = R4.

4. The electrochromic device according to claim 3 or the present invention, characterized in that, An interval region is formed between adjacent first and second grooves, in which R1 = R2.

5. The electrochromic device according to claim 3, characterized in that, The first inner fillet and the first outer fillet are tangent; and / or; The second inner fillet and the second outer fillet are tangent.

6. The electrochromic device according to claim 5, characterized in that, A gap is formed between adjacent first and second grooves. The width of the first groove is W1. The first inner fillet is tangent to the first outer fillet, and the tangent is parallel to the width direction of the corresponding gap. R1 = R2 = *W1; and / or, The width of the second groove near the corresponding interval is W2, the second inner fillet is tangent to the second outer fillet and the tangent is parallel to the width direction of the corresponding interval; in the corresponding interval, R3 = R4 = *W2.

7. The electrochromic device according to claim 6, characterized in that, R1=R2=R3=R4= *W1= *W2.

8. The electrochromic device according to claim 4 or 6, characterized in that, The interval area is a through groove, which connects the adjacent first groove and second groove; the first conductive substrate layer, the electrochromic layer and the second conductive substrate layer pass through the through groove.

9. The electrochromic device according to claim 4 or 6, characterized in that, The interval region is a convex portion, 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 convex portion.

10. An electrochromic device, characterized in that, Including a substrate and an electrochromic device as described in any one of claims 1-7, the electrochromic device comprising a first conductive substrate layer, an electrochromic layer, and a second conductive substrate layer sequentially stacked; the substrate being 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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