Electrochromic device, electrochromic glass and rearview mirror

Abstract

The present application relates to the technical field of electrochromic devices, and provides an electrochromic device, an electrochromic glass and a rearview mirror. The electrochromic device comprises a first lead electrode, a second lead electrode, and a first conductive substrate layer, an electrochromic layer and a second conductive substrate layer which are sequentially stacked; the first lead electrode comprises a first electrode body and a first protrusion which is arranged on the first electrode body and electrically connected to the first conductive substrate layer, and the first electrode body and the first protrusion are arranged at an angle; and / or the second lead electrode comprises a second electrode body and a second protrusion which is arranged on the second electrode body and electrically connected to the second conductive substrate layer, and the second electrode body and the second protrusion are arranged at an angle; the first protrusion increases the conductive area between the first lead electrode and the first conductive layer, and the second protrusion increases the conductive area between the second lead electrode and the second conductive layer, thereby accelerating the color change rate of the electrochromic device.

Description

Technical Field

[0001] The present application relates to the technical field of electrochromic technology, and in particular provides an electrochromic device, an electrochromic glass and a rearview mirror. Background Art

[0002] Electrochromic technology is a technology that causes electrochromic materials to color or fade under the action of external voltage. Devices containing electrochromic materials are electrochromic devices. Usually, an external power source is needed to power the electrochromic device to form a voltage at both ends of the electrochromic device. In recent years, electrochromic devices have been widely used in energy-saving windows, automotive rearview mirrors, display devices, mobile terminals and other fields, and have good market application prospects.

[0003] In the prior art, an extraction electrode is provided on the electrochromic device so that the electrochromic device is electrically connected to a power line of an external power source through the extraction electrode. However, the conductivity of the extraction electrode in the current electrochromic device is limited, and the electrical conduction rate between the extraction electrode and the electrochromic device is slow, resulting in a slow color change rate of the electrochromic device, which affects the color change effect of the electrochromic device. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an electrochromic device, electrochromic glass and a rearview mirror, aiming to solve the problem that the conductivity of the lead-out electrodes of the existing electrochromic devices is limited, resulting in poor overall color change effect of the electrochromic devices.

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

[0006] In a first aspect, an embodiment of the present application provides an electrochromic device, comprising a first lead-out electrode, a second lead-out electrode, and a first conductive substrate layer, an electrochromic layer, and a second conductive substrate layer stacked in sequence; the first lead-out electrode is electrically connected to the first conductive substrate layer, the first lead-out electrode comprises a first electrode body and a first protrusion disposed on the first electrode body and electrically connected to the first conductive substrate layer, the first electrode body and the first protrusion are disposed at an angle; and / or the second lead-out electrode is electrically connected to the second conductive substrate layer, the second lead-out electrode comprises a second electrode body and a second protrusion disposed on the second electrode body and electrically connected to the second conductive substrate layer, the second electrode body and the second protrusion are disposed at an angle.

[0007] In some embodiments, the first electrode body includes a first connecting portion electrically connected to the first conductive substrate layer and a first extending portion extending outward from the first connecting portion and beyond the edge of the first conductive substrate layer, and at least one first protrusion is provided on the first connecting portion; and / or, the second electrode body includes a second connecting portion electrically connected to the second conductive substrate layer and a second extending portion extending outward from the second connecting portion and beyond the edge of the second conductive substrate layer, and at least one second protrusion is provided on the second connecting portion.

[0008] In some embodiments, the first protrusions are provided on two opposite sides of the first connecting portion, and the first protrusions extend along the edge of the first conductive substrate layer; and / or, the second protrusions are provided on two opposite sides of the second connecting portion, and the second protrusions extend along the edge of the second conductive substrate layer.

[0009] In some embodiments, the length of the first protrusion extending along the edge of the first conductive substrate layer is L1, the length of the first connecting portion extending along the edge of the first conductive substrate layer is L2, and the following relationship is satisfied between L1 and L2: L1 / L2=K1, K1≥1 / 5; and / or, the length of the second protrusion extending along the edge of the second conductive substrate layer is L3, the length of the second connecting portion extending along the edge of the second conductive substrate layer is L4, and the following relationship is satisfied between L3 and L4: L3 / L4=K2, K2≥1 / 5.

[0010] In some embodiments, the first conductive substrate layer includes a first substrate layer and a first conductive layer disposed on the surface of the first substrate layer, the first connecting portion and the first protrusion are both disposed on the first conductive layer, and the first connecting portion and the first protrusion are both in direct contact with the first conductive layer; and / or, the second conductive substrate layer includes a second substrate layer and a second conductive layer disposed on the surface of the second substrate layer, the second connecting portion and the second protrusion are both disposed on the second conductive layer, and the second connecting portion and the second protrusion are both in direct contact with the second conductive layer.

[0011] In some embodiments, the resistance value of the first conductive layer ranges from 20-150Ω, and the width of the first protrusion ranges from 1.5-2.2 mm; and / or the resistance value of the second conductive layer ranges from 20-150Ω, and the width of the second protrusion ranges from 1.5-2.2 mm.

[0012] In some embodiments, a first hollow structure is formed on the first extension portion and / or the first connection portion; and / or a second hollow structure is formed on the second extension portion and / or the second connection portion.

[0013] In a second aspect, the present embodiment provides an electrochromic glass, comprising a first substrate, a second substrate and the electrochromic device, wherein the first substrate is arranged on a side of the first conductive base layer away from the electrochromic layer, and the second substrate is arranged on a side of the second conductive base layer away from the electrochromic layer.

[0014] In a third aspect, an embodiment of the present application provides a rearview mirror, comprising a reflective coating and the electrochromic glass, wherein the reflective coating is disposed on the first substrate or the second substrate.

[0015] The beneficial effects of the present application are as follows: by arranging a first protrusion on the first electrode body to increase the conductive contact area between the first lead electrode and the first conductive base layer, the conductive capacity of the first lead electrode can be improved, and the conductive rate between the first lead electrode and the first conductive base layer can be accelerated; by arranging a second protrusion on the second lead electrode body to increase the conductive contact area between the second lead electrode and the second conductive base layer, the conductive capacity of the second lead electrode can be improved, and the conductive rate between the second lead electrode and the second conductive base layer can be accelerated; thereby accelerating the color change rate of the electrochromic device and optimizing the color change effect of the electrochromic device.

[0016] Furthermore, the first protrusion and the second protrusion enable the first lead electrode and the second lead electrode to have sufficient conductivity, and thus there is no need to set additional bus bars on the peripheral edges of the electrochromic device. This can also satisfy the requirement that the electrochromic device has a faster color change rate and ensure the color change effect of the electrochromic device, thereby reducing the device manufacturing process, streamlining the device structure, greatly saving manufacturing costs, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of a top view of an electrochromic device provided in one embodiment of the present application;

[0019] Figure 2 A schematic diagram of a top view of an electrochromic device provided in another embodiment of the present application;

[0020] Figure 3 A schematic structural diagram of a first extraction electrode or a second extraction electrode of an electrochromic device provided in one embodiment of the present application;

[0021] Figure 4 A schematic structural diagram of a first lead-out electrode or a second lead-out electrode of an electrochromic device provided in another embodiment of the present application;

[0022] Figure 5 A schematic structural diagram of a first lead-out electrode or a second lead-out electrode of an electrochromic device provided in yet another embodiment of the present application;

[0023] Figure 6 A schematic diagram of the structure of a stacked arrangement of an electrochromic device provided in one embodiment of the present application;

[0024] Figure 7 A schematic diagram of a three-dimensional structure in which a first extraction electrode of an electrochromic device provided in an embodiment of the present application is connected to a first conductive substrate layer;

[0025] Figure 8 A schematic diagram of a three-dimensional structure in which a second extraction electrode of an electrochromic device provided in an embodiment of the present application is connected to a second conductive substrate layer;

[0026] Fig. 9 A schematic structural diagram of a first extraction electrode of an electrochromic device provided in another embodiment of the present application forming a first hollow structure or a second extraction electrode forming a first hollow structure;

[0027] Fig.10 A schematic structural diagram of an electrochromic glass provided in another embodiment of the present application.

[0028] Among them, the reference numerals in the figures are:

[0029] 1000. electrochromic device; 1001. visible area;

[0030] 2000, electrochromic glass;

[0031] 2001, sealant; 2002, first substrate; 2003, second substrate; 2004, shielding part;

[0032] 1. a first lead-out electrode; 101. a first electrode body;

[0033] 1011, first connecting portion; 1012, first extending portion; 102, first protruding portion;

[0034] 2. second extraction electrode; 201. second electrode body;

[0035] 2011, second connecting portion; 2012, second extending portion; 202, second protruding portion;

[0036] 3. First conductive base layer; 301. First base layer; 302. First conductive layer;

[0037] 4. Electrochromic layer;

[0038] 5. second conductive base layer; 501. second base layer; 502. second conductive layer;

[0039] 6. The first hollow structure; 7. The second hollow structure. DETAILED DESCRIPTION

[0040] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0041] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] Electrochromic technology is a technology that causes electrochromic materials to color or fade under the action of external voltage. Devices containing electrochromic materials are usually called electrochromic devices. By setting a lead-out electrode on the electrochromic device, the electrochromic device is electrically connected to the power line of the external power supply through the lead-out electrode. The current conductive contact area between the lead-out electrode and the conductive layer of the electrochromic device is limited, resulting in a certain limitation on the conductivity of the lead-out electrode, which in turn makes the electrical conduction rate relatively slow, affecting the color change effect of the electrochromic device. Since the lead-out electrode is usually set at the edge of the electrochromic device, when a voltage is applied to the electrochromic device through the lead-out electrode to change the color of the electrochromic device, the electrochromic device preferentially starts to change color from the local area where the lead-out electrode is set, which causes the other edge areas where the lead-out electrode is not set to change color more slowly, resulting in the problem that the overall color change speed of the electrochromic device is slow and the color change is uneven, affecting the color change effect of the electrochromic device.

[0046] In the prior art, in order to improve the electrical conduction rate between the electrochromic device and the lead-out electrode, a bus bar with conductive properties (such as silver paste and other conductive compounds such as carbon materials) is usually arranged around the edge of the electrochromic device to accelerate the electrical conduction rate of the electrochromic device through the bus bar; further, the lead-out electrode is arranged on the bus bar, thereby accelerating the overall color change rate of the electrochromic device. However, the process of arranging the bus bar on the electrochromic device is complicated, and it is necessary to consider the conductivity of the bus bar and the connection stability between the bus bar and the electrochromic device, and the installation cost is relatively high.

[0047] Based on this, in order to solve the above problems, refer to Figure 1 , Figure 2 , Figure 3 and Figure 6In a first aspect, an embodiment of the present application provides an electrochromic device 1000, comprising a first conductive substrate layer 3, an electrochromic layer 4 and a second conductive substrate layer 5 which are sequentially stacked, the electrochromic device 1000 further comprising a first lead-out electrode 1, the first lead-out electrode 1 being electrically connected to the first conductive substrate layer 3, the first lead-out electrode 1 comprising a first electrode body 101 and a first protrusion 102 which is disposed on the first electrode body 101 and electrically connected to the first conductive substrate layer 3, the first electrode body 101 and the first protrusion 102 being disposed at an angle; and / or, the electrochromic device 1000 further comprises a second lead-out electrode 2, the second lead-out electrode 2 being electrically connected to the second conductive substrate layer 5, the second lead-out electrode 2 comprising a second electrode body 201 and a second protrusion 202 which is disposed on the second electrode body 201 and electrically connected to the second conductive substrate layer 5, the second electrode body 201 and the second protrusion 202 being disposed at an angle.

[0048] refer to Figure 1 , Figure 2 The outer edge profile of the electrochromic device 1000 is an irregular shape, which can be composed of a variety of shape elements, including but not limited to arc and straight line, which are not specifically limited here. Figure 2 , the interior of the electrochromic device 1000 is a visible area 1001. It is worth noting that the dotted line in the figure marks the range of the visible area, and the area within the dotted line is the visible area, which is only an example in this embodiment. The specific position range of the visible area is not limited by the position of the dotted line. When the shape of the electrochromic device 1000 is irregular, the shape of the visible area 1001 can be adjusted accordingly following the outer contour of the electrochromic device 1000. The electrochromic material at the visible area 1001 can undergo reversible changes in color and transmittance under the action of voltage or current. By arranging the first lead-out electrode 1 and the second lead-out electrode 2 on the electrochromic device 1000, the current conduction is accelerated, so that the visible area 1001 of the electrochromic device 1000 can change color quickly.

[0049] Continue to refer Figure 1 and Figure 2The first lead electrode 1 and the second lead electrode 2 are respectively arranged at the edge of the electrochromic device 1000. Since the first lead electrode 1 and the second lead electrode 2 are usually made of opaque materials, in order to avoid affecting the color change range of the visible area 1001 of the electrochromic device 1000, the first protrusion 102 on the first electrode body 101 and the second protrusion 202 on the second electrode body 201 are extended along the edge of the electrochromic device, which can increase the conductive contact area between the first lead electrode 1 and the first conductive substrate layer 3 and between the second lead electrode 2 and the second conductive substrate layer 5, thereby improving the color change rate of the electrochromic device 1000 and avoiding affecting the color change effect of the visible area 1001 of the electrochromic device 1000.

[0050] In some embodiments, a first protrusion 102 is provided on the first electrode body 101, and the first protrusion 102 is provided at an angle to the first electrode body 101. It can be understood that an extension direction of the first protrusion 102 forms an angle with an extension direction of the first electrode body 101. And / or, a second protrusion 202 is provided on the second electrode body 201, and the second protrusion 202 is provided at an angle to the second electrode body 201.

[0051] In some embodiments, reference Figure 1 , the outer edge of the electrochromic device 1000 is an irregular shape, the first lead electrode 1 is arranged on the area where the outer edge of the electrochromic device 1000 tends to be a straight edge, the extension direction of the first protrusion 102 is different from the extension direction of the first electrode body 101, and the extension directions of the two form an angle. When the first protrusion 102 is arranged at an angle with the first electrode body 101, the first protrusion 102 extends along the edge of the first conductive substrate layer 3 and forms an electrical connection with the first conductive substrate layer 3. The first protrusion 102 can increase the conductive contact area between the first lead electrode 1 and the first conductive substrate layer 3, thereby improving the conductive ability of the first lead electrode 1, accelerating the conductive rate between the first lead electrode 1 and the first conductive substrate layer 3, and improving the color change effect of the electrochromic device 1000.

[0052] In other embodiments, reference Figure 1, the outer edge of the electrochromic device 1000 is an irregular shape, the second lead electrode 2 is arranged on the area where the outer edge of the electrochromic device 1000 tends to be a straight edge, the extension direction of the second protrusion 202 is different from the extension direction of the second electrode body 201, and the extension directions of the two form an angle. When the second protrusion 202 is arranged at an angle with the second electrode body 201, the second protrusion 202 extends along the edge of the second conductive substrate layer 5 and forms an electrical connection with the second conductive substrate layer 5. The second protrusion 202 can increase the conductive contact area between the second lead electrode 2 and the second conductive substrate layer 5, thereby improving the conductive ability of the second lead electrode 2, accelerating the conductive rate between the second lead electrode 2 and the second conductive substrate layer 5, and improving the color change effect of the electrochromic device 1000.

[0053] In some other embodiments, reference Figure 1 The first lead-out electrode 1 and the second lead-out electrode 2 are arranged opposite to each other on the electrochromic device 1000, and the first lead-out electrode 1 and the second lead-out electrode 2 are both arranged on the area where the outer edge of the electrochromic device 1000 tends to be straight. The external power supply first conducts the current to the edge part of the first conductive substrate layer 3 through the first lead-out electrode 1, and then conducts the current to the central part of the first conductive substrate layer 3, and the second lead-out electrode 2 first conducts the current to the edge part of the second conductive substrate layer 5, and then conducts the current to the central part of the second conductive substrate layer 5, so that the edge part of the electrochromic device 1000 changes color first and then the central part changes color, and finally achieves the effect of uniform color change from outside to inside, avoiding the problem of uneven color change of the electrochromic device 1000 due to the slow conduction speed in the local area during the color change process.

[0054] In addition, the first protrusion 102 extends along the edge of the first conductive substrate layer 3, and the second protrusion 202 extends along the edge of the second conductive substrate layer 5. When it is necessary to block the edge of the electrochromic device 1000 to prevent the first lead-out electrode 1 and the second lead-out electrode 2 from being seen, only part of the edge of the electrochromic device 1000 can be blocked, thereby reducing the influence of the first lead-out electrode 1 and the second lead-out electrode 2 on the area range of the visible area 1001 of the electrochromic device 1000.

[0055] In some embodiments, the first electrode body 101 and the first protrusion 102 are arranged at an angle, and the angle range between the first electrode body 101 and the first protrusion 102 is 30-150 degrees. For example, the angle range between the first electrode body 101 and the first protrusion 102 can be set within any angle range of 30-50 degrees, 50-70 degrees, 70-80 degrees, 80-90 degrees, 90-100 degrees, 100-110 degrees, 110-130 degrees, and 130-150 degrees.

[0056] In some other embodiments, the second electrode body 201 and the second protrusion 202 are arranged at an angle, and the angle range between the second electrode body 201 and the second protrusion 202 is 30-150 degrees. For example, the angle range between the second electrode body 201 and the second protrusion 202 can be set within any angle range of 30-50 degrees, 50-70 degrees, 70-80 degrees, 80-90 degrees, 90-100 degrees, 100-110 degrees, 110-130 degrees, and 130-150 degrees.

[0057] In the above embodiments, reference Figure 1 , Figure 2 It can be understood that when the first lead-out electrode 1 is disposed on an area where the outer edge of the electrochromic device 1000 tends to be a straight edge, the angle between the first electrode body 101 and the first protrusion 102 is 90 degrees, so that the first electrode body 101 extends along the straight edge of the electrochromic device 1000, and the first protrusion 102 extends along the straight edge of the electrochromic device 1000, avoiding affecting the visible range of the visible area 1001. When the first lead-out electrode 1 is disposed on an area where the outer edge of the electrochromic device 1000 is an arc edge, the angle between the first electrode body 101 and the first protrusion 102 is set according to the angle of the arc edge, and the first protrusion 102 can be set to an arc shape accordingly, so that the first protrusion 102 extends along the arc edge of the electrochromic device 1000, avoiding affecting the visible range of the visible area 1001.

[0058] When the second lead-out electrode 2 is disposed on an area where the outer edge of the electrochromic device 1000 tends to be a straight edge, the angle between the second electrode body 201 and the second protrusion 202 is 90 degrees, so that the second electrode body 201 extends along the straight edge of the electrochromic device 1000, and the second protrusion 202 extends along the straight edge of the electrochromic device 1000, avoiding affecting the visible range of the visual area 1001. When the second lead-out electrode 2 is disposed on an area where the outer edge of the electrochromic device 1000 is an arc edge, the angle between the second electrode body 201 and the second protrusion 202 is set according to the angle of the arc edge, and the second protrusion 202 can be set to an arc shape accordingly, so that the second protrusion 202 extends along the arc edge of the electrochromic device 1000, avoiding affecting the visible range of the visual area 1001.

[0059] It can be understood that the first protrusion 102 can be set only on the first electrode body 101; the second protrusion 202 can also be set only on the second electrode body 201; or, the first protrusion 102 is set on the first electrode body 101, and the second protrusion 202 is set on the second electrode body 201 at the same time; so as to meet the requirements of accelerating the color change rate of the electrochromic device 1000, and the specific setting structure can be selected according to the needs.

[0060] Preferably, the first extraction electrode 1 and the second extraction electrode 2 are arranged opposite to each other on the electrochromic device 1000 , and the first protrusion 102 is arranged on the first electrode body 101 , and the second protrusion 202 is arranged on the second electrode body 201 at the same time.

[0061] Further, refer to Figure 6-Figure 8 The first conductive substrate 3 includes a first substrate 301 stacked and a first conductive layer 302 disposed on the surface of the first substrate 301. The first substrate 301 of the first conductive substrate 3 is disposed on a side of the first conductive layer 302 away from the electrochromic layer 4. The second conductive substrate 5 includes a second substrate 501 stacked and a second conductive layer 502 disposed on the surface of the second substrate 501. The second substrate 501 of the second conductive substrate 5 is disposed on a side of the second conductive layer 502 away from the electrochromic layer 4. Preferably, the first substrate layer 301 and the second substrate layer 501 are selected from transparent flexible substrates, such as polyethylene glycol terephthalate (PET), polycarbonate (PC), etc., and can also be set as a glass substrate; the first conductive layer 302 and the second conductive layer 502 are set as indium-tin oxide (ITO), aluminum zinc oxide (AZO), fluorine doped tin oxide (FTO), and the first conductive layer 302 and the second conductive layer 502 are preferably set as ITO; so that the first conductive substrate layer 3 and the second conductive substrate layer 5 have good conductivity and light transmittance.

[0062] In some embodiments, the electrochromic layer 4 is made of electrochromic material, which can undergo stable and reversible color changes under the action of an external electric field. The electrochromic layer 4 is a sheet composed of one or more layers of materials in a gel state or solid state, such as a polymer dispersed liquid crystal (PDLC) layer, a suspended particle layer (SPD) and an electrochromic (EC) layer. For an electrochromic (EC) type electrochromic layer 4, it may include a color-changing material layer, an electrolyte layer and an ion storage layer stacked in sequence. The materials of the color-changing material layer, the electrolyte layer and the ion storage layer can be materials in the prior art, and this application does not make any special restrictions on this.

[0063] In some embodiments, the first extraction electrode 1 is electrically connected to the side of the first conductive layer 302 close to the electrochromic layer 4, and the first electrode body 101 partially extends outward beyond the edge of the first conductive layer 302 of the electrochromic device to facilitate electrical connection with an external power source. The second extraction electrode 2 is electrically connected to the side of the second conductive layer 502 close to the electrochromic layer 4, and the second electrode body 201 partially extends outward beyond the edge of the second conductive layer 502 of the electrochromic device to facilitate electrical connection with an external power source. By arranging the first extraction electrode 1 and the second extraction electrode 2 on the electrochromic device 1000 to form an electric field on both sides of the electrochromic layer 4, a voltage or current is provided to the electrochromic layer 4, thereby driving the electrochromic layer 4 to color or fade, so that the electrochromic device 1000 shows a change in transmittance in appearance, thereby adjusting the transmittance of the scene in which the electrochromic device 1000 is applied.

[0064] The electrochromic device 1000 of the present application can improve the conductivity of the first lead electrode 1 and accelerate the conductivity rate between the first lead electrode 1 and the first conductive base layer 3 by arranging a first protrusion 102 on the first electrode body 101 to increase the conductive contact area between the first lead electrode 1 and the first conductive layer 302; and / or, can improve the conductivity of the second lead electrode 2 and accelerate the conductivity rate between the second lead electrode 2 and the second conductive base layer 5 by arranging a second protrusion 202 on the second electrode body 201 to increase the conductive contact area between the second lead electrode 2 and the second conductive layer 502; thereby accelerating the color change rate of the electrochromic device 1000 and optimizing the color change effect of the electrochromic device 1000. Furthermore, the first lead electrode 1 has sufficient conductivity through the first protrusion 102, and / or the second lead electrode 2 has sufficient conductivity through the second protrusion 202, and then there is no need to set an additional bus bar on the peripheral edge of the electrochromic device 1000, so that the electrochromic device 1000 has a faster color change rate, ensuring the color change effect of the electrochromic device 1000, thereby reducing the device manufacturing process, simplifying the device structure, greatly saving the manufacturing cost, and improving the production efficiency.

[0065] refer to Figure 1-Figure 3 , Figure 6-Figure 8 The first electrode body 101 includes a first connecting portion 1011 arranged on the first conductive substrate layer 3 and a first extending portion 1012 extending outward from the first connecting portion 1011 and beyond the edge of the first conductive substrate layer 3; the second electrode body 201 includes a second connecting portion 2011 arranged on the second conductive substrate layer 5 and a second extending portion 2012 extending outward from the second connecting portion 2011 and beyond the edge of the second conductive substrate layer 5.

[0066] In some embodiments, the first extraction electrode 1 and the second extraction electrode 2 can be a flexible printed circuit (FPC), which is a flexible printed circuit board made of polyimide or polyester film as a substrate. Optionally, the first extraction electrode 1 and the second extraction electrode 2 are a composite layer structure, and the first extraction electrode body 1 and the second extraction electrode 2 each include at least one conductive layer and one conductive adhesive layer, and the conductive adhesive layer is made of conductive adhesive (Anisotropic Conductive Film, ACF).

[0067] In some embodiments, the first protrusion 102 is disposed on the first connection portion 1011 and is integrally formed with the first connection portion 1011, wherein the first protrusion 102 is a composite layer structure having the same structure as the first connection portion 1011, and the first connection portion 1011 and the first protrusion 102 are both in direct contact with the first conductive layer 302. Further, the conductive adhesive layer of the first connection portion 1011 and the conductive adhesive layer of the first protrusion 102 are both in direct contact with the first conductive layer 302, respectively, so that the first extraction electrode 1 is electrically connected to the first conductive layer 302 as a whole, that is, there is no need to set a bus bar on the first conductive layer 302, which simplifies the structure and saves manufacturing costs. The power cord of the external power supply can be electrically connected to the first extension portion 1012 of the first main body 1012 by welding or conductive adhesive.

[0068] In other embodiments, the second protrusion 202 is disposed on the second connection portion 2011 and is integrally formed with the second connection portion 2011, wherein the second protrusion 202 is a composite layer structure having the same structure as the second connection portion 2011, and the second connection portion 2011 and the second protrusion 202 are both in direct contact with the second conductive layer 502. Further, the conductive adhesive layer of the second connection portion 2011 and the conductive adhesive layer of the second protrusion 202 are both in direct contact with the second conductive layer 502, respectively, so that the second extraction electrode 2 is electrically connected to the second conductive layer 502 as a whole, that is, there is no need to provide a bus bar on the second conductive layer 502, which simplifies the structure and saves manufacturing costs. The power line of the external power supply can be electrically connected to the second extension portion 2012 by welding or conductive adhesive.

[0069] It should be noted that, in some other embodiments, the first extraction electrode 1 and the second extraction electrode 2 may not include a conductive glue layer; by pre-disposing conductive glue on the first conductive layer 302, and / or by pre-coating conductive glue on the first connection portion 1011 and the first protruding portion 102, the first connection portion 1011 and the first protruding portion 102 are pressed together at the position where the conductive glue is disposed on the first conductive layer 302 to achieve connection. Similarly, by pre-disposing conductive glue on the second conductive layer 502, and / or by pre-coating conductive glue on the second connection portion 2011 and the second protruding portion 202, the second connection portion 2011 and the second protruding portion 202 are pressed together at the position where the conductive glue is disposed on the second conductive layer 502 to achieve connection.

[0070] refer to Figure 3-Figure 5 , the number and the position of the first protrusions 102 are not limited here, and one or more first protrusions 102 may be provided on only one side of the first connection portion 1011; or one or more first protrusions 102 may be provided on multiple sides of the first connection portion 1011. Similarly, the number and the position of the second protrusions 202 are not limited here, and one or more second protrusions 202 may be provided on only one side of the second connection portion 2011; or one or more second protrusions 202 may be provided on multiple sides of the second connection portion 2011.

[0071] In some embodiments, reference Figure 3 , first protrusions 102 are provided on opposite sides of the first connecting portion 1011, and second protrusions 202 are provided on both sides of the second connecting portion 2011; it can be understood that through such a design, the conductive contact area between the first lead-out electrode 1 and the first conductive layer 302 can be increased as much as possible, and the conductivity rate between the first lead-out electrode 1 and the first conductive layer 302 can be accelerated; similarly, the conductive contact area between the second lead-out electrode 2 and the second conductive layer 502 can be increased as much as possible, and the conductivity rate between the second lead-out electrode 2 and the second conductive layer 502 can be accelerated, thereby improving the color change rate of the electrochromic device 1000 and optimizing the color change effect of the electrochromic device 1000. This embodiment is the most preferred solution of the present application.

[0072] In other embodiments, reference Figure 4 , Figure 5, the first protrusion 102 is only provided on one of the two opposite sides of the first connection portion 1011, which can also increase the conductive contact area between the first extraction electrode 1 and the first conductive layer 302, and accelerate the conductivity rate between the first extraction electrode 1 and the first conductive layer 302. And / or, the second protrusion 202 is only provided on one of the two opposite sides of the second connection portion 2011, which can also increase the conductive contact area between the second extraction electrode 2 and the second conductive layer 502, and accelerate the conductivity rate between the second extraction electrode 2 and the second conductive layer 502, thereby optimizing the color change effect of the electrochromic device 1000.

[0073] refer to Figure 1-Figure 3 In some embodiments, the first protrusion 102 extends along the edge of the first conductive layer 302. When the edge profile of the first conductive layer 302 is a straight line, the first protrusion 102 extends in the direction of the straight line; when the edge profile of the first conductive layer 302 is an arc, the first protrusion 102 extends in the direction of the arc. Further, the first protrusion 102 is made as close as possible to the outer edge of the first conductive layer 302, and the distance between the first protrusion 102 and the outer edge of the first conductive layer 302 is in the range of 0.5-10 mm. For example, the distance between the first protrusion 102 and the outer edge of the first conductive layer 302 can be set in any distance range of 0.5 mm-1.0 mm, 1.0 mm-2.0 mm, 2.0-3.0 mm, 3.0 mm-4.0 mm, 4.0 mm-5.0 mm, 5.0 mm-6.0 mm, 6.0 mm-7.0 mm, 7.0 mm-8.0 mm, 8.0 mm-9.0 mm and 9.0-10.0 mm. The first protrusion 102 is prevented from occupying the area of ​​the visible area 1001 as much as possible, and the electrochromic device 1000 is allowed to occupy more area of ​​the visible area 1001 as much as possible, thereby improving the user experience of the electrochromic device.

[0074] In some embodiments, the second protrusion 202 extends along the edge of the second conductive layer 502, that is, when the edge profile of the second conductive layer 502 is a straight line, the second protrusion 202 extends along the straight line; when the edge profile of the second conductive layer 502 is an arc, the second protrusion 202 extends along the arc. Further, the second protrusion 202 is made as close as possible to the outer edge of the second conductive layer 502, and the distance range between the second protrusion 202 and the outer edge of the second conductive layer 502 is 0.5-10 mm. For example, the distance range between the second protrusion 202 and the outer edge of the second conductive layer 502 can be set to any distance range of 0.5 mm-1.0 mm, 1.0 mm-2.0 mm, 2.0-3.0 mm, 3.0 mm-4.0 mm, 4.0 mm-5.0 mm, 5.0 mm-6.0 mm, 6.0 mm-7.0 mm, 7.0 mm-8.0 mm, 8.0 mm-9.0 mm and 9.0-10.0 mm. The second protrusion 202 is placed close to the outer edge of the second conductive layer 502 to avoid the second protrusion 202 affecting the visible range of the visible area 1001 as much as possible. On the electrochromic device 1000 of the same size, as much area of ​​the electrochromic device 1000 as possible can form the visible area 1001 to improve the user experience of the electrochromic device.

[0075] It can be understood that the larger the area of ​​the electrochromic device 1000 is, the longer the circumference of the outer edge of the electrochromic device 1000 is. In order to ensure the color changing effect of the electrochromic device 1000, the conductive contact area between the first lead-out electrode 1 and the electrochromic device 1000 needs to be increased accordingly to improve the conductivity of the first lead-out electrode 1 and accelerate the conductivity rate between the first lead-out electrode 1 and the first conductive substrate layer 3; similarly, the conductive contact area between the second lead-out electrode 2 and the electrochromic device 1000 needs to be increased to improve the conductivity of the second lead-out electrode 2 and accelerate the conductivity rate between the second lead-out electrode 2 and the second conductive substrate layer 5.

[0076] In some embodiments, the total length of the first connection portion 1011 and the first protrusion 102 extending along the edge of the first conductive layer 302 is increased. In other embodiments, the total length of the second connection portion 2011 and the second protrusion 202 extending along the edge of the second conductive layer 502 is increased.

[0077] Specifically, when the outer edge circumference of the electrochromic device 1000 is greater than 100 mm, for every 20 mm increase in the circumference, the total length of the first connecting portion 1011 and the first protrusion 102 extending along the edge of the first conductive layer 302 needs to increase by 5-10 mm; the total length of the second connecting portion 2011 and the second protrusion 202 extending along the edge of the second conductive layer 502 needs to increase by 5-10 mm.

[0078] In the above embodiment, the extension length of the first connection part 1011 can be increased, and / or the extension length of the first protruding part 102 can be increased; because when the extension length of the first connection part 1011 is increased, the width of the first main body part 1012 will also increase, and the wider first main body part 1012 will increase the difficulty of manufacturing in the subsequent bending process, so it is preferred to increase the length of the first protruding part 102. Similarly, the extension length of the second connection part 2011 can be increased, and / or the extension length of the second protruding part 202 can be increased; because when the extension length of the second connection part 2011 is increased, the width of the second main body part 2012 will also increase, and the wider second main body part 2012 will increase the difficulty of manufacturing in the subsequent bending process, so it is preferred to increase the length of the second protruding part 202.

[0079] It should be noted that the circumference range of the outer edge of the electrochromic device 1000 of the present application is 400mm-700mm, and the circumference range can be set to be greater than or equal to 400mm and less than or equal to 700mm. For example, the circumference range can be set within any thickness range of 400mm-450mm, 450mm-500mm, 500mm-550mm, 550mm-600mm, 600mm-650mm and 650mm-700mm.

[0080] For example, the circumference range may be set to one of 400 mm, 450 mm, 500 mm, 550 mm, 600 mm, 650 mm, and 700 mm.

[0081] It should be noted that the various numerical ranges appearing in the embodiments of the present application, such as other numerical ranges that appear later, can all refer to the circumference range of the outer edge, and the numerical ranges may include at least one of the two endpoint values, or the numerical range may not include the two endpoint values. The embodiments of the present application will not be described in detail later.

[0082] In some embodiments, the length of the first protrusion 102 extending along the edge of the first conductive substrate layer is L1, the length of the first connection portion 1011 extending along the edge of the first conductive substrate layer is L2, and the following relationship is satisfied between L1 and L2: L1 / L2=K1, K1≥1 / 5. In other embodiments, the length of the second protrusion 202 extending along the edge of the second conductive substrate layer is L3, the length of the second connection portion 2011 extending along the edge of the second conductive substrate layer is L4, and the following relationship is satisfied between L3 and L4: L3 / L4=K2, K2≥1 / 5.

[0083] In this embodiment, the length of the first protrusion 102 is at least 1 / 5 of the length of the first connection portion 1011, and the lower limit of the length of the first protrusion 102 is defined to ensure that the conductive contact area increased by the first protrusion 102 can achieve the effect of optimizing the color change effect of the electrochromic device 1000. The length of the second protrusion 202 is at least 1 / 5 of the length of the second connection portion 2011, and the lower limit of the length of the second protrusion 202 is defined to ensure that the conductive contact area increased by the second protrusion 202 can play a role in optimizing the color change effect of the electrochromic device 1000.

[0084] Further, the length of the first protrusion 102 extending along the edge of the first conductive substrate layer is L1, the length of the first connection portion 1011 extending along the edge of the first conductive substrate layer is L2, and the following relationship is satisfied between L1 and L2: L1 / L2=K1, 5≥K1≥1 / 5. In other embodiments, the length of the second protrusion 202 extending along the edge of the second conductive substrate layer is L3, the length of the second connection portion 2011 extending along the edge of the second conductive substrate layer is L4, and the following relationship is satisfied between L3 and L4: L3 / L4=K2, 5≥K2≥1 / 5.

[0085] In some embodiments, the resistance of the first conductive layer 302 is in the range of 20-150Ω, and the width of the first protrusion 102 is in the range of 1.5-2.2 mm.

[0086] Exemplarily, when the first conductive layer 302 is an ITO coating, the lower the resistance of the first conductive layer 302 and the thicker the ITO coating, the greater the overall brittleness of the ITO coating and the more susceptible it is to damage by pressure; conversely, the higher the resistance of the first conductive layer 302 and the thinner the ITO coating, the better the flexibility of the ITO coating. Therefore, the width of the first protrusion 102 needs to be set according to the resistance value of the first conductive layer 302. When the resistance value of the first conductive layer 302 is small, the overall brittleness of the first conductive layer 302 will increase, and the contact area between the first protrusion 102 and the first conductive layer 302 needs to be increased to reduce the pressure between the two, so as to avoid the first conductive layer 302 being locally damaged due to excessive pressure when the first connecting portion 1011 and the first protrusion 102 are pressurized and fitted; and the width of the first protrusion 102 cannot be too wide, otherwise when the first protrusion 102 is subsequently covered, the area of ​​the shielding area is set larger, which will reduce the visible range of the color change area of ​​the electrochromic device and affect the user experience of the device.

[0087] refer to Figure 3, the width direction of the first protrusion 102 is perpendicular to the direction in which the first protrusion 102 extends along the edge of the first conductive layer 302. For example, when the resistance value of the first conductive layer 302 is in the range of 20-40Ω, the width of the first protrusion 102 (marked w in the figure) is in the range of 2.0-2.2mm; when the resistance value of the first conductive layer 302 is in the range of 40-100Ω, the width of the first protrusion 102 (marked w in the figure) is in the range of 1.8.-2.0mm; when the resistance value of the first conductive layer 302 is in the range of 100-150Ω, the width of the first protrusion 102 (marked w in the figure) is in the range of 1.5-1.8mm.

[0088] In some other embodiments, the resistance value of the second conductive layer 502 is in the range of 20-150Ω, and the width of the second protrusion 202 is in the range of 1.5-2.2 mm.

[0089] Exemplarily, when the second conductive layer 502 is an ITO coating, the lower the resistance of the second conductive layer 502 and the thicker the ITO coating, the greater the overall brittleness of the ITO coating and the more susceptible it is to damage by pressure; conversely, the higher the resistance of the second conductive layer 502 and the thinner the ITO coating, the better the flexibility of the ITO coating. Therefore, the width of the second protrusion 202 needs to be set according to the resistance value of the second conductive layer 502. When the resistance value of the second conductive layer 502 is small, the overall brittleness of the second conductive layer 502 will increase, and the contact area between the second protrusion 202 and the second conductive layer 502 needs to be increased to reduce the pressure between the two, so as to avoid the second conductive layer 502 being locally damaged due to excessive pressure when the second connecting portion 2011 and the second protrusion 202 are pressurized and fitted; and the width of the second protrusion 202 cannot be too wide, otherwise when the second protrusion 202 is subsequently covered, the area of ​​the shielding area is set larger, which will reduce the visible range of the color change area of ​​the electrochromic device and affect the user experience of the device.

[0090] refer to Figure 3 , the width direction of the second protrusion 202 is perpendicular to the extension direction of the second protrusion 202 along the edge of the second conductive layer 502. Exemplarily, when the resistance range of the second conductive layer 502 is: 20-40Ω, the width range of the second protrusion 202 (marked w in the figure) is 2.0-2.2mm; when the resistance range of the second conductive layer 502 is: 40-100Ω, the width range of the second protrusion 202 (marked w in the figure) is 1.8.-2.0mm; when the resistance range of the second conductive layer 502 is: 100-150Ω, the width range of the second protrusion 202 (marked w in the figure) is 1.5-1.8mm.

[0091] refer to Fig. 9In some embodiments, a first hollow structure 6 is formed on the first electrode body 101. The first hollow structure 6 can be formed on the first extension portion 1012, or on the first connection portion 1011, or the first hollow structure 6 can span both the first extension portion 1012 and the first connection portion 1011. In other embodiments, a second hollow structure 7 is formed on the second electrode body 201. The second hollow structure 7 can be formed on the second extension portion 2012, or on the second connection portion 2011, or the second hollow structure 7 can span both the first extension portion 2012 and the first connection portion 2011.

[0092] Specifically, the first hollow structure 6 is a plurality of notches provided on the first extension portion 1012, and the length direction of a single notch is consistent with the width direction of the first connection portion 1011, and the plurality of notches are arranged at intervals along the length direction of the first connection portion 1011; by such an arrangement, when the first electrode 1 is subjected to a force that causes it to bend, the force can be dispersed in different regions through the plurality of notches, thereby preventing the first electrode 1 from being broken. Similarly, the second hollow structure 7 is a plurality of notches provided on the second extension portion 2012; the length direction of a single notch is consistent with the width direction of the second connection portion 2011, and the plurality of notches are arranged at intervals along the length direction of the second connection portion 2011; by such an arrangement, when the second electrode 2 is subjected to a force that causes it to bend, the force can be dispersed in different regions through the plurality of notches, thereby preventing the second electrode 2 from being broken.

[0093] refer to Fig.10 The electrochromic device 1000 is specifically applied to an electrochromic glass 2000 . The electrochromic glass 2000 includes substrates disposed on both sides of the electrochromic device 1000 and a sealant 2001 formed between the two substrates.

[0094] Specifically, the sealant 2001 is cured by light or / and heat conduction, and the material of the sealant 2001 can be set to a heat-hardening glue, and the heat-hardening glue can be set to one of polyolefins, polyamides, polyesters, ethylene, and copolymers thereof. Optionally, the volume shrinkage of the heat-hardening glue is greater than or equal to 0.5% and less than or equal to 2%, and the volume shrinkage of the heat-hardening glue can be set within any of the shrinkage ranges of 0.5%-0.8%, 0.8%-1%, 1%-1.2%, 1.2%-1.5%, 1.5%-1.8%, and 1.8%-2%. Alternatively, the sealant 2001 can also be a light-hardening glue, including one of epoxy resin, vinyl ether resin, acrylate resin, unsaturated resin, polyester, polyolefin, and polythiol and a photoinitiator.

[0095] Therefore, by setting the first hollow structure 6 on the first electrode body 101, the sealant 2001 that is at least partially blocked by the first lead-out electrode 1 is exposed through the first hollow structure 6, thereby reducing the blocking area of ​​the sealant 2001 by the first lead-out electrode 1; the sealant 2001 that is at least partially blocked by the second electrode body 201 is exposed through the second hollow structure 7, thereby reducing the blocking area of ​​the sealant 2001 by the second lead-out electrode 2; thereby, during the curing process of the sealant 2001, the light blocking effect of the first lead-out electrode 1 and the second lead-out electrode 2 is reduced, and the curing effect of the sealant 2001 is improved, for example: shortening the curing time of the sealant 2001 and / or enhancing the curing and cross-linking degree of the sealant 2001, thereby improving the sealing performance of the electrochromic glass 2000.

[0096] The electrochromic device provided in the present application can be more conveniently connected to an external power source by respectively arranging a first lead-out electrode 1 and a second lead-out electrode 2 on the electrochromic device 1000, thereby facilitating driving and controlling the electrochromic device 1000. The external power source conducts current to the first conductive substrate layer 3 through the first lead-out electrode 1, thereby conducting the current to the central portion of the first conductive substrate layer 3, and the second lead-out electrode 2 conducts current to the second conductive substrate layer 5, thereby conducting the current to the central portion of the second conductive substrate layer 5, so as to form an electric field on both sides of the electrochromic layer, thereby driving the electrochromic layer to color or fade, so that the electrochromic device 1000 shows a change in transmittance in appearance, thereby realizing the adjustment of the transmittance of the scene in which the electrochromic device is applied.

[0097] Continue to refer Fig.10 In a second aspect of an embodiment of the present application, an electrochromic glass 2000 is provided, comprising a first substrate 2002, a second substrate 2003 and an electrochromic device 1000, wherein the first substrate 2002 is arranged on a side of the first conductive base layer 3 away from the electrochromic layer 4, and the second substrate 2003 is arranged on a side of the second conductive base layer 5 away from the electrochromic layer 4.

[0098] It can be understood that the first substrate 2002 and the second substrate 2003 are both light-transmissive, preferably glass, and the sealant 2001 is arranged between the first substrate 2002 and the second substrate 2003 along the circumferential direction; the first extension portion 1012 extends out of the sealant 2001; the second extension portion 2012 extends out of the sealant 2001, thereby facilitating an external power source to be electrically connected to the first extension portion 1012 and the second extension portion 2012, one positive and one negative, respectively, to power the electrochromic device 1000.

[0099] The electrochromic glass 2000 also includes a shielding portion 2004 disposed on the first substrate 2002 or the second substrate 2003, and the shielding portion 2004 can cover the first connecting portion 1011 and the first protruding portion 102 of the first lead-out electrode 1 along the stacking direction, and the shielding portion 2004 can cover the second connecting portion 2011 and the second protruding portion 202 of the second lead-out electrode 2 along the stacking direction; then, when the electrochromic glass 2000 is viewed from the side of the substrate having the shielding portion 2004, the shielding portion 2004 can shield the first lead-out electrode 1 and the second lead-out electrode 2 so that the two are not exposed.

[0100] The third aspect of the embodiment of the present application further provides a rearview mirror, including a reflective coating and an electrochromic glass 2000 , wherein the reflective coating is disposed on a first substrate 2002 or a second substrate 2003 .

[0101] It can be understood that a reflective coating (not shown in the figure) can be provided on the first substrate 2002 or the second substrate 2003. In some embodiments, a reflective coating can be provided on the side of the first substrate 2002 facing the electrochromic device 1000. Thus, by providing the reflective coating, when an external light source is projected into the rearview mirror from the side of the second substrate 2003, the light source can be reflected to the outside by the reflective layer on the first substrate 2002, thereby realizing the rearview function of the vehicle rearview mirror, and utilizing the color change phenomenon of the electrochromic device 1000, the anti-glare effect of the rearview mirror can be achieved; further, by providing the reflective coating on the side of the first substrate 2002 or the second substrate 2003 close to the electrochromic device 1000, a more effective protection effect can be formed on the reflective layer, and the service life of the rearview mirror can be extended.

[0102] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions 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: include: A first conductive substrate layer, an electrochromic layer and a second conductive substrate layer are sequentially stacked; a first extraction electrode electrically connected to the first conductive base layer, the first extraction electrode comprising a first electrode body and a first protrusion disposed on the first electrode body and electrically connected to the first conductive base layer, the first electrode body and the first protrusion being disposed at an angle; and / or, The second lead-out electrode is electrically connected to the second conductive base layer. The second lead-out electrode includes a second electrode body and a second protrusion disposed on the second electrode body and electrically connected to the second conductive base layer. The second electrode body and the second protrusion are disposed at an angle.

2. The electrochromic device according to claim 1, characterized in that: The first electrode body comprises a first connecting portion electrically connected to the first conductive substrate layer and a first extending portion extending outward from the first connecting portion and beyond an edge of the first conductive substrate layer, and the first connecting portion is provided with at least one first protrusion; and / or, The second electrode body includes a second connection portion electrically connected to the second conductive base layer and a second extension portion extending outward from the second connection portion and beyond an edge of the second conductive base layer. The second connection portion is provided with at least one second protrusion.

3. The electrochromic device according to claim 2, characterized in that: The first protrusions are disposed on opposite sides of the first connecting portion, and the first protrusions extend along the edge of the first conductive base layer; and / or, The second protruding portions are disposed on opposite sides of the second connecting portion, and the second protruding portions extend along the edge of the second conductive base layer.

4. The electrochromic device according to claim 2 or 3, characterized in that: The length of the first protrusion extending along the edge of the first conductive base layer is L1, the length of the first connection portion extending along the edge of the first conductive base layer is L2, and the following relationship is satisfied between L1 and L2: L1 / L2=K1, K1≥1 / 5; and / or, The length of the second protrusion extending along the edge of the second conductive base layer is L3, the length of the second connection portion extending along the edge of the second conductive base layer is L4, and the following relationship is satisfied between L3 and L4: L3 / L4=K2, K2≥1 / 5.

5. The electrochromic device according to claim 2, characterized in that: The first conductive base layer includes a first base layer and a first conductive layer disposed on a surface of the first base layer, the first connecting portion and the first protruding portion are both disposed on the first conductive layer, and the first connecting portion and the first protruding portion are both in direct contact with the first conductive layer; and / or, The second conductive base layer includes a second base layer and a second conductive layer disposed on the surface of the second base layer. The second connecting portion and the second protruding portion are both disposed on the second conductive layer, and the second connecting portion and the second protruding portion are both in direct contact with the second conductive layer.

6. The electrochromic device according to claim 5, characterized in that: The resistance value of the first conductive layer is in the range of 20-150Ω, and the width of the first protrusion is in the range of 1.5-2.2mm; and / or, The resistance value of the second conductive layer is in the range of 20-150Ω, and the width of the second protrusion is in the range of 1.5-2.2 mm.

7. The electrochromic device according to claim 2, characterized in that: A first hollow structure is formed on the first extension portion and / or the first connection portion; and / or a second hollow structure is formed on the second extension portion and / or the second connection portion.

8. An electrochromic glass, characterized in that: The invention comprises a first substrate, a second substrate and the electrochromic device according to any one of claims 1 to 7, wherein the first substrate is arranged on a side of the first conductive base layer away from the electrochromic layer, and the second substrate is arranged on a side of the second conductive base layer away from the electrochromic layer.

9. The electrochromic glass according to claim 8, characterized in that: The electrochromic glass further includes a sealant disposed between the first substrate and the second substrate along a circumferential direction; the first extension portion of the electrochromic device extends out of the sealant; and the second extension portion of the electrochromic device extends out of the sealant.

10. A rearview mirror, characterized in that: The invention comprises a reflective coating and the electrochromic glass according to claim 8 or 9, wherein the reflective coating is arranged on the first substrate or the second substrate.

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