CN113568233B

CN113568233B - Electrochromic device and preparation method thereof

Info

Publication number: CN113568233B
Application number: CN202110826680.2A
Authority: CN
Inventors: 陈海峰; 刘振钊; 彭剑瑜
Original assignee: Shenzhen Guangyi Tech Co Ltd
Current assignee: Shenzhen Guangyi Tech Co Ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2022-10-14
Anticipated expiration: 2041-07-21
Also published as: CN113568233A

Abstract

The invention provides an electrochromic device and a preparation method thereof, wherein the electrochromic device comprises a first substrate layer, a packaging layer and a second substrate layer which are sequentially laminated from top to bottom, the packaging layer comprises an electrochromic region and a conducting structure, the conducting structure is arranged at the outer edge of the electrochromic region, and the conducting structure sequentially comprises a first conducting region and a second conducting region which are connected from inside to outside; a first conductive paste and a first sealant are arranged in the first conduction region, the first conductive paste is electrically communicated with the first conductive layer, and the first sealant covers at least part of the surface of the first conductive paste; and a second sealant, a second conductive paste, a third conductive layer and a third basal layer are arranged in the second conduction region, the second conductive paste is in contact with the first conductive paste, and the second sealant covers at least part of the surface of the second conductive paste. The invention conducts the first conductive paste and the side surface of the first conductive paste in a contact way, and improves the contact area of the first conductive paste and the side surface of the first conductive paste, thereby avoiding poor contact and improving the conduction effect.

Description

Electrochromic device and preparation method thereof

Technical Field

The invention belongs to the technical field of electrochromic devices, and relates to an electrochromic device and a preparation method thereof.

Background

The electrochromic phenomenon refers to a reversible change phenomenon of color and transparency, which is caused by reversible redox reaction of a material under the action of an external electric field, and the change of optical properties (such as transmissivity, absorptivity and reflectivity) of the material is expressed in appearance. The intelligent window prepared based on the electrochromic technology can be used for controlling the illuminance inside a building, an airplane or an automobile, and the electrochromic intelligent window can also selectively absorb or reflect external heat radiation, so that a large amount of energy which is required to be consumed for keeping the building cool in summer and warm in winter is effectively reduced. Therefore, the electrochromic device has been widely applied to the industries of electrochromic energy-saving smart windows, automobile rearview anti-dazzle mirrors, display devices and the like.

In the prior art, when electrodes of an electrochromic device are led out, an electrode lead connected with a first transparent conducting layer and an electrode lead connected with a second transparent conducting layer are usually led out from an upper conductive substrate and a lower conductive substrate respectively, and hot-press welding needs to be performed twice, for example, after the electrode lead of a lower piece is welded, the electrochromic device is turned over, and the electrode lead of the upper piece is welded, so that the process is complex, the automatic production is not facilitated, the working efficiency is low, and the yield is not improved.

CN213365229U discloses such an electrochromic device, which includes a first conductive layer, an electrochromic layer, a second conductive layer and an extraction electrode, where the first conductive layer, the electrochromic layer and the second conductive layer are stacked. The first conducting layer comprises a first overlapping area and a first staggered area, the second conducting layer comprises a second overlapping area and a second staggered area, at least parts of the first staggered area and the second staggered area are located on the same side of the electrochromic layer, a first bus bar is arranged on the first conducting layer, a second bus bar is arranged on the second conducting layer, and the leading-out electrodes are respectively communicated with the first bus bar and the second bus bar.

CN111142303A discloses an improved structure of electrochromic rearview mirror, comprising: a rear-view mirror body, this rear-view mirror rear side face can supply to set up a display, and the rear-view mirror body contains: the display comprises a first lens group, a second lens group, an electrochromic layer, two conducting strips, first conducting glue and second conducting glue, wherein the first lens group is provided with a first coating, the second lens group is provided with a second coating, the electrochromic layer comprises a packaging frame glue and an electrochromic material, one of the two conducting strips is a conducting part, the other conducting strip is a contact part, the conducting parts of the two conducting strips are respectively bonded on the second lens group, and the display is electrically connected with the contact parts of the two conducting strips in a welding mode.

The leading-out electrodes of the current battery color-changing device in the prior art are usually connected to two oppositely arranged conductive layers of the electrochromic layer, and the structure has at least the following disadvantages: when the extraction electrode is bound, hot pressing needs to be carried out twice, and the electrochromic device needs to be turned over in the middle of the two hot pressing, so that the process is complex, and the production efficiency of the electrochromic device is reduced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an electrochromic device and a preparation method thereof, wherein the first conductive paste is in contact conduction with the side surface of the first conductive paste, so that the contact area of the first conductive paste and the side surface of the first conductive paste is increased, poor contact is avoided, and the conduction effect is improved; the peripheral sides of the first conductive paste and the second conductive paste are filled with sealant, so that the sealing and insulating effects are achieved.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the invention provides an electrochromic device, which comprises a first substrate layer, a packaging layer and a second substrate layer which are sequentially stacked from top to bottom, wherein the packaging layer comprises an electrochromic region and a conducting structure, the conducting structure is arranged at the outer edge of the electrochromic region, and the conducting structure sequentially comprises a first conducting region and a second conducting region which are connected from inside to outside;

the electrochromic area comprises a first substrate layer, a first conducting layer, an electrochromic layer, a second conducting layer and a second substrate layer which are sequentially stacked from top to bottom, first conductive paste and first sealant are arranged in the first conducting area, the first conductive paste is electrically communicated with the first conducting layer, and the first sealant covers at least part of the surface of the first conductive paste, so that the first conductive paste is not in contact with the electrochromic layer and the second conducting layer;

and a second sealant, a second conductive paste, a third conductive layer and a third basal layer are arranged in the second conduction area, the third conductive layer and the second conductive layer are positioned on the same horizontal plane and are not in contact with each other, the second conductive paste is close to the third conductive layer and is in contact with the first conductive paste, and the second sealant covers at least part of the surface of the second conductive paste.

In the present invention, at least one of the first conductive layer and the second conductive layer is preferably transparent for exhibiting the optical property change of the electrochromic device, and the material of the transparent conductive layer includes, but is not limited to, any one or a combination of at least two of Indium Tin Oxide (ITO), aluminum Zinc Oxide (AZO), fluorine-doped tin oxide (FTO), nano silver wire, graphene, carbon nanotube, metal mesh, or silver nanoparticle. The thickness of the conductive layer is 0.1nm-1 μm. At least one of the first and second substrate layers is preferably transparent for exhibiting a change in the optical properties of the electrochromic device, the material of the substrate layers comprising glass, plastic, metal. The plastic substrate material includes, but is not limited to, any one of or a combination of at least two of polyethylene terephthalate (PET), cyclic olefin copolymer, or cellulose triacetate. The first conductive paste and the second conductive paste are made of conductive materials, and the conductive materials comprise any one or combination of at least two of conductive silver paste, conductive copper paste, conductive carbon paste, nano-silver conductive ink and the like. The first sealant and the second sealant are adhesives with insulating and water and oxygen isolating effects, such as any one of hot melt adhesives, UV (ultraviolet) light curing adhesives, thermosetting adhesives or UV heating dual-curing adhesives or a combination of at least two of the adhesives.

The invention provides an electrochromic device, wherein a conducting structure can conduct a first conducting layer to a third conducting layer, so that when an electrode is led out, one pole of a positive electrode and a negative electrode can be connected to the second conducting layer at one side of a second base material layer, the other pole of the positive electrode and the negative electrode is connected to the third conducting layer, the positive electrode and the negative electrode are connected with an external power supply, and voltage is adjusted to control the transmittance state of the electrochromic device. The side surfaces of the first conductive paste and the second conductive paste are in contact conduction, so that the contact area of the first conductive paste and the second conductive paste is greatly increased, poor contact is avoided, and the conduction effect is improved; meanwhile, the peripheral sides of the first conductive paste and the second conductive paste are filled with the sealant, so that on one hand, the first conductive paste and the second conductive paste can be ensured to be in close contact, on the other hand, the sealing effect can be achieved, water vapor is prevented from invading an electrochromic region, and in addition, the first conductive paste, the second conductive paste and the second conductive layer are isolated, the insulating effect is achieved, and short circuit is avoided.

As a preferred embodiment of the present invention, the first substrate layer and the first conductive layer extend from the electrochromic region to above the first conductive region, and the first conductive layer is in contact with the first conductive paste.

Preferably, a first bus bar is disposed between the first conductive layer and the first conductive paste.

In the invention, the first bus bar is made of a conductive material with higher conductivity, and the conductive material comprises any one or a combination of at least two of conductive silver paste, conductive copper paste, conductive carbon paste, nano-silver conductive ink, copper foil, copper wire or conductive adhesive film.

Preferably, the width of the first bus bar is greater than the width of the first conductive paste.

Preferably, a gap width between the first conductive paste and the electrochromic layer is greater than a gap width between the first bus bar and the electrochromic layer.

Preferably, the first sealant is filled in all the spaces except the spaces occupied by the first conductive paste and the first bus bar.

According to the invention, a certain gap width is arranged between the first conductive paste and the electrochromic layer, so that the first conductive paste is prevented from directly contacting the electrochromic layer, and the ion storage layer and the color-changing material layer of the electrochromic layer are prevented from being short-circuited through the first conductive paste. The first conductive paste and the first bus bar at least include, in addition to a space occupied by the first conductive paste: a gap between the first conductive paste and the electrochromic layer, and a gap between the first conductive paste and the second substrate layer. The first sealant is filled in the gap between the first conductive paste and the electrochromic layer, the first sealant is filled between the first conductive paste and the second base material layer, and the first conductive paste is ensured not to contact the electrochromic layer and the second conductive layer through the insulating sealant, so that the insulating effect is further achieved, and the short circuit failure of the electrochromic device is avoided. Meanwhile, the first sealant seals the periphery of the electrochromic layer, so that the effect of isolating water vapor can be achieved, the water vapor is prevented from invading the electrochromic region, and the service life of the electrochromic device is prolonged.

As a preferable aspect of the present invention, a second bus bar is disposed between the third conductive layer and the second conductive paste.

In the invention, the second bus bar is made of a conductive material with higher conductivity, and the conductive material comprises any one or a combination of at least two of conductive silver paste, conductive copper paste, conductive carbon paste, nano-silver conductive ink, copper foil, copper wire or conductive adhesive film.

Preferably, the width of the second bus bar is greater than the width of the second conductive paste.

Preferably, the second sealant is filled in all the other spaces in the second conductive region except the space occupied by the second conductive paste and the second bus bar.

In the present invention, the space at least includes a gap between the second conductive paste and the outer edge of the electrochromic device and a gap between the second conductive paste and the first substrate layer, except for the space occupied by the second conductive paste and the second bus bar. Through filling the second sealant, the peripheral side of the second conductive paste can be wrapped in the second sealant, the second conductive paste is prevented from being oxidized due to contact with air, and the second sealant can further seal the peripheral side of the electrochromic layer to enhance the water-oxygen sealing effect.

In a preferred embodiment of the present invention, an interface between the electrochromic region and the first conductive region is a first interface, and an interface between the first conductive region and the second conductive region is a second interface.

Preferably, one end of the first bus bar is located at the second interface, and the other end of the first bus bar is located at the first interface or spaced apart from the first interface.

It should be noted that the width of the first bus bar may be equal to the width of the first conducting area, that is, the first bus bar runs from the first interface to the second interface. Preferably, the width of the first bus bar is slightly shorter than that of the first conduction region, one end of the first bus bar is flush with the second interface, a certain interval is left between the other end of the first bus bar and the first interface, the interval is filled with the first sealant, the reason for the interval is convenient for process operation, enough operation space can be left when the first conductive paste is poured, and the possibility of short circuit is reduced.

Preferably, one end face of the first conductive paste and one end face of the second conductive paste form surface contact at a second interface, a space is reserved between the other end face of the first conductive paste and the first interface, the space is filled with the first sealant, and a space is reserved between the other end face of the second conductive paste and the outer edge of the electrochromic device, and the second sealant is filled.

According to the invention, the first sealant is filled in the gap between the first conductive paste and the electrochromic layer, so that the first conductive paste is ensured not to contact the electrochromic layer and the second conductive layer, an insulating effect is achieved, and short circuit failure of an electrochromic device is avoided. Meanwhile, the first sealant seals the periphery of the electrochromic layer, so that the effect of isolating water vapor can be achieved, the water vapor is prevented from invading the electrochromic region, and the service life of the electrochromic device is prolonged. Through filling the second sealant, the peripheral side of the second conductive paste can be wrapped in the second sealant, the second conductive paste is prevented from being oxidized due to contact with air, and the second sealant can further seal the peripheral side of the electrochromic layer to enhance the water-oxygen sealing effect.

Preferably, an end face of the first conductive paste and an end of the first bus bar are in surface contact with an end face of the second conductive paste at the second interface.

In the invention, one end side face of the second conductive paste is contacted with one end side face of the first conductive paste at the first interface, and the surface contact can ensure that the first conductive paste and the second conductive paste have larger contact area, thereby ensuring better conduction effect and avoiding poor contact; and a space is reserved between the side face of the other end of the second conductive paste and the outer edge of the electrochromic device, and second sealant is filled in the space, so that an ideal sealing effect is achieved on the side face of the electrochromic device.

The contact state of the first conductive paste and the second conductive paste is not particularly required or limited, and the two following structural requirements can be met:

(1) The side surface of the first conductive paste is in contact with the side surface of the second conductive paste;

(2) The surface of the first conductive paste does not directly contact the structural layer on the opposite side, and similarly, the surface of the second conductive paste does not directly contact the structural layer on the opposite side.

On the premise of meeting the requirements, the contact state and the height position relation of each surface of the first conductive paste and the second conductive paste can be changed in various ways, and in order to clearly describe the height position relation of each surface of the first conductive paste and the second conductive paste, the surfaces on the two sides of the first conductive paste and the second conductive paste are named respectively: the contact surface of the first conductive paste and the first bus bar is a first contact surface, and the surface of the opposite side of the first contact surface is a first surface; similarly, the contact surface of the second conductive paste with the second bus bar is referred to as a second contact surface, and the surface on the opposite side of the second contact surface is referred to as a second surface.

Illustratively, the invention provides four optional surface high-low position relations as follows:

(1) The first contact surface is higher than the second surface, the extension surface of the first surface is positioned between the second surface and the second contact surface, the thickness of the first conductive paste is equivalent to that of the second conductive paste, the contact side surface of the first conductive paste and the contact side surface of the second conductive paste are staggered, and the whole first conductive paste is higher than the second conductive paste;

(2) The extension surface of the first contact surface and the extension surface of the first surface are both positioned between the second surface and the second contact surface; the thickness of the first conductive paste is smaller than that of the second conductive paste, and the contact side surface of the second conductive paste completely covers the contact side surface of the first conductive paste;

(3) The extension surface of the first contact surface is positioned between the second surface and the second contact surface, the first surface is lower than the second contact surface, the extension line of the first surface is positioned between the surfaces of the two sides of the second bus bar, the thickness of the first conductive paste is equivalent to that of the second conductive paste, the contact side surface of the first conductive paste and the contact side surface of the second conductive paste are staggered, and the whole first conductive paste is lower than the second conductive paste;

(4) The first contact surface is higher than the second surface, the extension surface of the second surface is positioned between the first surface and the first contact surface, and the extension surface of the first surface is positioned between the two side surfaces of the second bus bar; the thickness of the first conductive paste is larger than that of the second conductive paste, and the contact side face of the first conductive paste completely covers the contact side face of the second conductive paste.

Of course, the above four position relationships are only exemplary, and do not represent the four situations, and any position state that can satisfy the conduction requirement can be used in the present invention.

As a preferable technical solution of the present invention, the electrochromic layer includes an ion storage layer, an electrolyte layer, and a color-changing material layer, which are sequentially stacked, and the ion storage layer is disposed on a side close to the first conductive layer, or the color-changing material layer is disposed on a side close to the first conductive layer.

In the present invention, the materials of the ion storage layer, the electrolyte layer and the color-changing material layer can all be the materials in the prior art, and the details of the present invention are not repeated herein.

Preferably, a first optical adhesive layer is arranged between the first substrate layer and the packaging layer, wherein the first optical adhesive layer is tightly attached to the first substrate layer.

Preferably, a second optical adhesive layer is arranged between the packaging layer and the second substrate layer, wherein the second optical adhesive layer is tightly attached to the second substrate layer.

The Optical Adhesive layer in the present invention may adopt any one of PolyVinyl Butyral (PVB), ethylene-vinyl Acetate Copolymer (EVA), OCA (Optical Clear Adhesive), SCA (SCA Optical Adhesive), ionic intermediate film (surpe Safe Glas, SGP), liquid Optical Adhesive LOCA (Liquid Optical Clear Adhesive) or acryl, or a combination of at least two of them.

In a preferred embodiment of the present invention, the first substrate layer and/or the second substrate layer is a water-oxygen barrier film.

In the present invention, the water oxygen barrier film is a flexible layer or a rigid layer that can block water oxygen, and may be, for example, a commercially available flexible water oxygen barrier film sheet, or a rigid glass layer.

Preferably, the first substrate layer and/or the second substrate layer are/is an appearance textured film.

In the present invention, the appearance texture film is a film sheet with a texture pattern effect.

Preferably, the first conductive paste and the second conductive paste are both silver pastes.

In a second aspect, the present invention provides a method for preparing an electrochromic device according to the first aspect, wherein the method comprises:

preparing an electrochromic lamination, wherein the electrochromic lamination comprises a first substrate layer, a first conducting layer, an electrochromic layer, a second conducting layer and a second substrate layer which are sequentially laminated;

(II) preparing a first conduction region and a second conduction region respectively;

the preparation method of the first conduction region comprises the following steps: cutting from one side of the second substrate layer to form a first groove, wherein the second substrate layer, the second conductive layer and the electrochromic layer in the first groove are all removed; filling first conductive paste in the first groove, and filling first sealant on the surface of the first conductive paste; arranging a second base material layer on the outer side of the second base layer to form the first conducting area;

the preparation method of the second conduction region comprises the following steps: cutting a second groove from one side of the first substrate layer, wherein the first substrate layer, the first conductive layer and the electrochromic layer in the second groove are all removed; filling second conductive paste in the second groove, and filling second sealant on the surface of the second conductive paste; and arranging a first base material layer outside the first base layer to form the second conduction region.

The first groove divides the second substrate layer and the second conductive layer into two areas which are not in contact with each other, and the second substrate layer and the second conductive layer corresponding to the second conduction area are respectively used as a third substrate layer and a third conductive layer; the second conductive paste is in contact with the first conductive paste.

As a preferred technical solution of the present invention, the method for preparing the first conducting region further includes: and after a second substrate layer is arranged on the outer side of the second basal layer, curing the first sealant.

Preferably, the preparation method of the first conduction region further comprises: and after a first base material layer is arranged on the outer side of the first base layer, curing the second sealant.

Preferably, step (ii) further comprises: after the first conduction region is prepared, turning over the electrochromic lamination layer with the formed first conduction region to prepare the second conduction region; or after the second conduction region is prepared, turning over the electrochromic lamination layer with the second conduction region to prepare the first conduction region.

According to the invention, the conductive paste is dotted from two sides through double-sided cutting, so that the contact area of the conductive paste which is conducted up and down is increased, poor contact is avoided, and the conduction effect is improved; and then, the device is sealed by directly dispensing the sealant at the conductive paste, so that the water and oxygen blocking effect of the electrochromic device is improved, and the sealing adhesive layer can also play an insulating effect, so that the conductive layer or the electrochromic layer is not required to be etched.

As a preferred technical solution of the present invention, in the electrochromic stack prepared in step (i), the outer surface of the first substrate layer is further provided with a first optical adhesive layer and a first back film, and the outer surface of the second substrate layer is further provided with a second optical adhesive layer and a second back film.

In the step (ii), the step of providing the first base layer outside the first base layer includes removing the first back film, and attaching the first base layer to the first optical adhesive layer.

And the step of arranging a second substrate layer on the outer side of the second base layer comprises removing the second back film and pasting the second substrate layer on the second optical adhesive layer.

As a preferred technical solution of the present invention, after the step (ii) is finished, the electrochromic stack layer close to the outer side of the second conduction region is cut along the edge of the second sealant.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides an electrochromic device, wherein a conducting structure can realize the conduction of a first conducting layer to a third conducting layer; meanwhile, the peripheral sides of the first conductive paste and the second conductive paste are filled with the sealant, so that on one hand, the first conductive paste and the second conductive paste can be ensured to be in close contact, on the other hand, the sealing effect can be achieved, water vapor is prevented from invading an electrochromic region, and in addition, the first conductive paste, the second conductive paste and the second conductive layer are isolated, the insulating effect is achieved, and short circuit is avoided.

Drawings

Fig. 1 is a schematic structural diagram of an electrochromic device provided in embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of an electrochromic device provided in embodiment 2 of the present invention;

fig. 3 is a schematic structural diagram of an electrochromic device provided in embodiment 3 of the present invention;

fig. 4 is a schematic structural diagram of an electrochromic device provided in embodiment 4 of the present invention;

fig. 5 is a schematic structural diagram of an electrochromic device provided in embodiment 5 of the present invention;

wherein, 1-a first substrate layer; 2-a first optical glue layer; 3-a first substrate layer; 4-a first conductive layer; 5-an ion storage layer; 6-an electrolyte layer; 7-a layer of colour-changing material; 8-a second conductive layer; 9-a second substrate layer; 10-a second optical adhesive layer; 11-a second substrate layer; 12-first conductive paste; 13-a first sealant; 14-second conductive paste; 15-a second sealant; 16-a first busbar; 17-a second bus bar; 18-a third conductive layer; 19-a third substrate layer.

Detailed Description

It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Example 1

This embodiment provides an electrochromic device as shown in fig. 1, electrochromic device is including first substrate layer 1, encapsulated layer and the second substrate layer 11 that from top to bottom stacks gradually, and the encapsulated layer includes electrochromic district and conduction structure, and conduction structure sets up in the outward flange of electrochromic district, and conduction structure is by interior consecutive first conduction district and the second conduction district of including outside to.

The electrochromic region comprises a first substrate layer 3, a first conducting layer 4, an electrochromic layer, a second conducting layer 8 and a second substrate layer 9 which are sequentially stacked from top to bottom, first conducting paste 12 and first sealant 13 are arranged in the first conducting region, the first conducting paste 12 is electrically communicated with the first conducting layer 4, and the first sealant 13 covers at least part of the surface of the first conducting paste 12, so that the first conducting paste 12 is not in contact with the electrochromic layer and the second conducting layer 8.

The second conduction region is internally provided with a second sealant 15, a second conductive paste 14, a third conductive layer 18 and a third substrate layer 19, the third conductive layer 18 and the second conductive layer 8 are positioned on the same plane and are not contacted with each other, the third substrate layer 19 and the second substrate layer 9 are positioned on the same plane and are not contacted with each other, the second conductive paste 14 is close to the third conductive layer 18 and is contacted with the first conductive paste 12, and the second sealant 15 covers at least part of the surface of the second conductive paste 14.

The first substrate layer 3 and the first conductive layer 4 extend from the electrochromic region to above the first conductive region, the first conductive layer 4 is in contact with the first conductive paste 12, and the first sealant 13 is filled in all the other spaces in the first conductive region except the space occupied by the first conductive paste 12. The second sealant 15 is filled in all the other spaces in the second conductive region except the space occupied by the second conductive paste 14.

The interface of the electrochromic region and the first conducting region is marked as a first interface, and the interface of the first conducting region and the second conducting region is marked as a second interface. One end face of the first conductive paste 12 is located at the second interface, a space is reserved between the other end face of the first conductive paste 12 and the first interface, and the space is filled with the first sealant 13. One end face of the second conductive paste 14 is located at the second interface and is in contact with one end face of the first conductive paste 12, and a space is reserved between the other end of the second conductive paste 14 and the outer edge of the electrochromic device and is filled with a second sealant 15.

At the second interface, an end face of the second conductive paste 14 makes partial surface contact with an end face of the first conductive paste 12, and for convenience of description, the faces are named: the contact surface of the first conductive paste 12 and the first conductive layer 4 is a first contact surface, and the surface on the opposite side of the first contact surface is a first surface; similarly, the contact surface between the second conductive paste 14 and the third conductive layer 18 is referred to as a second contact surface, and the surface opposite to the second contact surface is referred to as a second surface. The first contact surface is higher than the second surface, the extension surface of the first surface is positioned between the second surface and the second contact surface, the thickness of the first conductive paste 12 is equivalent to that of the second conductive paste 14, the contact side surface of the first conductive paste 12 is staggered with the contact side surface of the second conductive paste 14, and the whole first conductive paste 12 is higher than the second conductive paste 14.

The electrochromic layer includes an ion storage layer 5, an electrolyte layer 6, and a coloring material layer 7, which are sequentially stacked, the ion storage layer 5 being disposed on a side close to the first conductive layer 4. Set up first optics glue film 2 between first substrate layer 1 and the packaging layer, wherein, first substrate layer 1 is hugged closely to first optics glue film 2. A second optical adhesive layer 10 is arranged between the packaging layer and the second substrate layer 11, wherein the second optical adhesive layer 10 is tightly attached to the second substrate layer 11.

The first substrate layer 1 is a water-oxygen barrier film, the second substrate layer 11 is an appearance texture film, the first conductive paste 12 and the second conductive paste 14 are silver pastes, and the first base layer 3 and the second base layer 9 are PET layers.

Example 2

The embodiment provides an electrochromic device as shown in fig. 2, the electrochromic device includes a first substrate layer 1, a packaging layer and a second substrate layer 11 which are stacked from top to bottom in sequence, the packaging layer includes an electrochromic region and a conducting structure, the conducting structure is arranged at the outer edge of the electrochromic region, and the conducting structure sequentially includes a first conducting region and a second conducting region which are connected from inside to outside.

A second sealant 15, a second conductive paste 14, a third conductive layer 18 and a third substrate layer 19 are arranged in the second conduction region, the third conductive layer 18 and the second conductive layer 8 are positioned on the same plane and are not in contact with each other, the third substrate layer 19 and the second substrate layer 9 are positioned on the same plane and are not in contact with each other, the second conductive paste 14 is close to the third conductive layer 18 and is in contact with the first conductive paste 12, and the second sealant 15 covers at least part of the surface of the second conductive paste 14.

The first substrate layer 3 and the first conductive layer 4 extend from the electrochromic region to above the first conduction region, the first conductive layer 4 is in contact with the first conductive paste 12, a first bus bar 16 is arranged between the first conductive layer 4 and the first conductive paste 12, the width of the first bus bar 16 is greater than that of the first conductive paste 12, and except for the space occupied by the first conductive paste 12 and the first bus bar 16, the first sealant 13 is completely filled in other spaces in the first conduction region.

A second bus bar 17 is arranged between the third conductive layer 18 and the second conductive paste 14, the width of the second bus bar 17 is greater than that of the second conductive paste 14, and the second sealant 15 is filled in the other spaces in the second conductive area except the space occupied by the second conductive paste 14 and the second bus bar 17.

The interface of the electrochromic region and the first conducting region is marked as a first interface, and the interface of the first conducting region and the second conducting region is marked as a second interface. One end of the first bus bar 16 is aligned with one end face of the first conductive paste 12 and is located at the second interface, a gap is reserved between the other end of the first bus bar 16 and the first interface, a gap is reserved between the other end face of the first conductive paste 12 and the first interface, the width of the gap between the first conductive paste 12 and the first interface is greater than the width of the gap between the first bus bar 16 and the first interface, and the gap is filled with the first sealant 13. One end face of the second conductive paste 14 is located at the second interface and is in contact with one end face of the first conductive paste 12, and a space is reserved between the other end of the second conductive paste 14 and the outer edge of the electrochromic device and filled with a second sealant 15.

At the second interface, an end face of the second conductive paste 14 makes full surface contact with an end face of the first conductive paste 12, and for convenience of description, the faces are named: the contact surface of the first conductive paste 12 and the first bus bar 16 is referred to as a first contact surface, and the surface on the opposite side of the first contact surface is referred to as a first surface; similarly, the contact surface of second conductive paste 14 with second bus bar 17 is referred to as a second contact surface, and the surface opposite to the second contact surface is referred to as a second surface. The extension surface of the first contact surface and the extension surface of the first surface are both positioned between the second surface and the second contact surface; corresponding to the thickness of the first conductive paste 12 being smaller than the thickness of the second conductive paste 14, the contact side of the second conductive paste 14 completely covers the contact side of the first conductive paste 12.

The electrochromic layer includes an ion storage layer 5, an electrolyte layer 6, and a coloring material layer 7, which are sequentially stacked, the ion storage layer 5 being disposed on a side close to the first conductive layer 4. A first optical adhesive layer 2 is arranged between the first substrate layer 1 and the packaging layer, wherein the first optical adhesive layer 2 is tightly attached to the first substrate layer 1. A second optical adhesive layer 10 is arranged between the packaging layer and the second substrate layer 11, wherein the second optical adhesive layer 10 is tightly attached to the second substrate layer 11.

Example 3

The embodiment provides an electrochromic device as shown in fig. 3, the electrochromic device includes a first substrate layer 1, a packaging layer and a second substrate layer 11 which are stacked from top to bottom in sequence, the packaging layer includes an electrochromic region and a conducting structure, the conducting structure is arranged at an outer edge of the electrochromic region, and the conducting structure includes a first conducting region and a second conducting region which are connected from inside to outside in sequence.

The first substrate layer 3 and the first conducting layer 4 extend from the electrochromic region to the upper part of the first conducting region, the first conducting layer 4 is in contact with the first conducting paste 12, a first bus bar 16 is arranged between the first conducting layer 4 and the first conducting paste 12, the width of the first bus bar 16 is larger than that of the first conducting paste 12, and except for the space occupied by the first conducting paste 12 and the first bus bar 16, the first sealant 13 is completely filled in other spaces in the first conducting region.

The interface of the electrochromic region and the first conducting region is marked as a first interface, and the interface of the first conducting region and the second conducting region is marked as a second interface. One end of the first bus bar 16 is aligned with one end face of the first conductive paste 12 and is located at the second interface, a gap is reserved between the other end of the first bus bar 16 and the first interface, a gap is reserved between the other end face of the first conductive paste 12 and the first interface, the width of the gap between the first conductive paste 12 and the first interface is greater than the width of the gap between the first bus bar 16 and the first interface, and the gap is filled with the first sealant 13. One end face of the second conductive paste 14 is located at the second interface and is in contact with one end face of the first conductive paste 12, and a space is reserved between the other end of the second conductive paste 14 and the outer edge of the electrochromic device and is filled with a second sealant 15.

At the second interface, an end face of the second conductive paste 14 is in partial surface contact with an end face of the first conductive paste 12, and for convenience of description, the faces are named: the contact surface of the first conductive paste 12 and the first bus bar 16 is referred to as a first contact surface, and the surface on the opposite side of the first contact surface is referred to as a first surface; similarly, the contact surface of second conductive paste 14 and second bus bar 17 is referred to as a second contact surface, and the surface opposite to the second contact surface is referred to as a second surface. The extension surface of the first contact surface is located between the second surface and the second contact surface, the first surface is lower than the second contact surface, the extension line of the first surface is located between the two side surfaces of the second bus bar 17, the thickness of the first conductive paste 12 is equivalent to that of the second conductive paste 14, the contact side surface of the first conductive paste 12 and the contact side surface of the second conductive paste 14 are staggered, and the whole first conductive paste 12 is lower than the second conductive paste 14.

The first substrate layer 1 is a water-oxygen barrier film, the second substrate layer 11 is a water-oxygen barrier film, the first conductive paste 12 and the second conductive paste 14 are silver pastes, and the first base layer 3 and the second base layer 9 are PET layers.

Example 4

The embodiment provides an electrochromic device as shown in fig. 4, the electrochromic device includes a first substrate layer 1, a packaging layer and a second substrate layer 11 which are stacked from top to bottom in sequence, the packaging layer includes an electrochromic region and a conducting structure, the conducting structure is arranged at an outer edge of the electrochromic region, and the conducting structure includes a first conducting region and a second conducting region which are connected from inside to outside in sequence.

A second bus bar 17 is arranged between the third conductive layer 18 and the second conductive paste 14, the width of the second bus bar 17 is greater than that of the second conductive paste 14, and except for the space occupied by the second conductive paste 14 and the second bus bar 17, the other spaces in the second conductive area are all filled with a second sealant 15.

The interface of the electrochromic region and the first conductive region is denoted as a first interface, and the interface of the first conductive region and the second conductive region is denoted as a second interface. One end of the first bus bar 16 is aligned with one end face of the first conductive paste 12 and is located at the second interface, a gap is reserved between the other end of the first bus bar 16 and the first interface, a gap is reserved between the other end face of the first conductive paste 12 and the first interface, the width of the gap between the first conductive paste 12 and the first interface is greater than the width of the gap between the first bus bar 16 and the first interface, and the gap is filled with the first sealant 13. One end face of the second conductive paste 14 is located at the second interface and is in contact with one end face of the first conductive paste 12, and a space is reserved between the other end of the second conductive paste 14 and the outer edge of the electrochromic device and filled with a second sealant 15.

At the second interface, an end face of the second conductive paste 14 is in full-face contact with an end face of the first conductive paste 12, and for convenience of description, the faces are named: the contact surface of the first conductive paste 12 and the first bus bar 16 is referred to as a first contact surface, and the surface on the opposite side of the first contact surface is referred to as a first surface; similarly, the contact surface of second conductive paste 14 and second bus bar 17 is referred to as a second contact surface, and the surface opposite to the second contact surface is referred to as a second surface. The first contact surface is higher than the second surface, the extension surface of the second surface is located between the first surface and the first contact surface, and the extension surface of the first surface is located between both side surfaces of the second bus bar 17; corresponding to the thickness of the first conductive paste 12 being greater than the thickness of the second conductive paste 14, the contact side of the first conductive paste 12 completely covers the contact side of the second conductive paste 14.

The first substrate layer 1 is a water-oxygen barrier film, the second substrate layer 11 is an appearance texture film, the first conductive paste 12 and the second conductive paste 14 are silver paste, and the first base layer 3 and the second base layer 9 are PET layers.

Example 5

The embodiment provides an electrochromic device as shown in fig. 5, the electrochromic device includes a first substrate layer 1, a packaging layer and a second substrate layer 11 which are stacked from top to bottom in sequence, the packaging layer includes an electrochromic region and a conducting structure, the conducting structure is arranged at an outer edge of the electrochromic region, and the conducting structure includes a first conducting region and a second conducting region which are connected from inside to outside in sequence.

At the second interface, an end face of the second conductive paste 14 makes partial surface contact with an end face of the first conductive paste 12, and for convenience of description, the faces are named: the contact surface of the first conductive paste 12 and the first bus bar 16 is referred to as a first contact surface, and the surface on the opposite side of the first contact surface is referred to as a first surface; similarly, the contact surface of second conductive paste 14 and second bus bar 17 is referred to as a second contact surface, and the surface opposite to the second contact surface is referred to as a second surface. The first contact surface is higher than the second surface, the extension surface of the first surface is positioned between the second surface and the second contact surface, which is equivalent to the thickness of the first conductive paste 12 equivalent to the thickness of the second conductive paste 14, the contact side surface of the first conductive paste 12 is staggered with the contact side surface of the second conductive paste 14, and the whole first conductive paste 12 is higher than the second conductive paste 14.

The first substrate layer 1 is an appearance texture film, the second substrate layer 11 is an appearance texture film, the first conductive paste 12 and the second conductive paste 14 are silver paste, and the first base layer 3 and the second base layer 9 are PET layers.

Example 6

The embodiment provides a preparation method of the electrochromic device shown in

embodiment

1 or 2, which specifically includes the following steps:

(1) Preparing an electrochromic lamination, wherein the electrochromic lamination comprises a first substrate layer 3, a first conducting layer 4, an electrochromic layer, a second conducting layer 8 and a second substrate layer 9 which are sequentially laminated; the outer side of the first substrate layer 3 is provided with a first optical adhesive layer 2 and a back film;

(2) Cutting from one side of the first substrate layer 3 to form a second groove, and removing all the first substrate layer 3, the first conductive layer 4 and the electrochromic layer in the second groove;

(3) Filling second conductive paste 14 into the second groove, and filling second sealant 15 on the surface of the second conductive paste 14;

(4) Removing the back film on the outer side of the first basal layer 3, arranging a first substrate layer 1 on the outer surface of the first basal layer 3, and curing a second sealant 15 to form a second conduction region;

(5) Cutting from one side of the second substrate layer 9 to form a first groove, and removing all the second substrate layer 9, the second conductive layer 8 and the electrochromic layer in the first groove; the first groove and the second groove are horizontally arranged adjacently, the first groove divides the second substrate layer 9 and the second conductive layer 8 into two areas which are not in contact with each other, the second substrate layer corresponding to the second conducting area is used as a third substrate layer 19, and the second conductive layer corresponding to the second conducting area is used as a third conductive layer 18;

(6) Filling first conductive paste 12 in the first groove, and filling first sealant 13 on the surface of the first conductive paste 12;

(7) Sequentially arranging a second optical adhesive layer 10 and a second base material layer 11 on the outer surface of the second base layer 9, and curing first sealant 13 to form a first conduction region;

(8) And cutting off the electrochromic laminate close to the outer side of the second conduction region along the edge of the second sealant 15 to obtain the electrochromic device.

In some other embodiments of the present invention, the second pass-through region may be prepared first and then the first pass-through region, i.e., steps 2-4 and 5-7 in example 6 are exchanged.

In some other embodiments of the present invention, unlike embodiment 6, the electrochromic stack prepared in step 1 does not have the first optical adhesive layer 2 and the back film on the outer side of the first substrate layer 3, so that an optical adhesive layer needs to be additionally arranged when the first substrate layer 1 is attached, and the electrochromic device as shown in fig. 3 can be prepared.

In some other embodiments of the invention, different from embodiment 6, the electrochromic stack prepared in step 1, the first substrate layer 3 is provided on the outside with a first optical glue layer 2 and a backing film, and the second substrate layer 9 is provided on the outside with a second optical glue layer 10 and a backing film; the electrochromic device shown in fig. 4 can be obtained without additionally providing an optical adhesive layer when the first substrate layer 1 and the second substrate layer 11 are attached.

In some other embodiments of the present invention, unlike embodiment 6, the electrochromic stack prepared in embodiment 1 does not have the first optical glue layer 2 and the backing film on the outside of the first substrate layer 3 and the second optical glue layer 10 and the backing film on the outside of the second substrate layer 9; an optical adhesive layer is additionally required to be arranged when the first substrate layer 1 is attached, so that the electrochromic device shown in fig. 5 can be obtained.

The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.

Claims

1. The electrochromic device is characterized by comprising a first substrate layer, a packaging layer and a second substrate layer which are sequentially stacked from top to bottom, wherein the packaging layer comprises an electrochromic area and a conducting structure, the conducting structure is arranged at the outer edge of the electrochromic area, and the conducting structure sequentially comprises a first conducting area and a second conducting area which are connected from inside to outside;

the electrochromic area comprises a first substrate layer, a first conducting layer, an electrochromic layer, a second conducting layer and a second substrate layer which are sequentially stacked from top to bottom, wherein a first conductive paste and a first sealant are arranged in the first conducting area, the first conductive paste is electrically communicated with the first conducting layer, and the first sealant covers at least part of the surface of the first conductive paste so that the first conductive paste is not in contact with the electrochromic layer and the second conducting layer;

a second sealant, a second conductive paste, a third conductive layer and a third substrate layer are arranged in the second conduction region, the third conductive layer and the second conductive layer are positioned on the same horizontal plane and are not in contact with each other, the second conductive paste is close to the third conductive layer and is in contact with the first conductive paste, and the second sealant covers at least part of the surface of the second conductive paste;

the conducting structure conducts the first conducting layer to the third conducting layer.

2. The electrochromic device of claim 1, wherein the first substrate layer and the first conductive layer extend from the electrochromic region over the first conductive region, and the first conductive layer is in contact with the first conductive paste.

3. The electrochromic device according to claim 1, wherein a first bus bar is disposed between the first conductive layer and the first conductive paste.

4. The electrochromic device according to claim 3, wherein the width of the first bus bar is greater than the width of the first conductive paste.

5. The electrochromic device of claim 3, wherein a gap width between the first conductive paste and the electrochromic layer is greater than a gap width between the first bus bar and the electrochromic layer.

6. The electrochromic device according to claim 3, wherein the first sealant is filled entirely in the space in the first conductive region except for the space occupied by the first conductive paste and the first bus bar.

7. The electrochromic device according to claim 1, wherein a second bus bar is disposed between the third conductive layer and the second conductive paste.

8. The electrochromic device according to claim 7, wherein the width of the second bus bar is greater than the width of the second conductive paste.

9. The electrochromic device according to claim 7, wherein the second sealant is filled entirely in the other spaces in the second conductive area except for the spaces occupied by the second conductive paste and the second bus bar.

10. The electrochromic device according to claim 3, wherein the interface of the electrochromic region with the first conductive region is denoted as a first interface and the interface of the first and second conductive regions is denoted as a second interface.

11. The electrochromic device according to claim 10, wherein one end of the first bus bar is located at the second interface, and the other end of the first bus bar is located at the first interface, or is spaced apart from the first interface.

12. The electrochromic device according to claim 1, wherein an end face of the first conductive paste and an end face of the second conductive paste form surface contact at the second interface, a space is reserved between the other end face of the first conductive paste and the first interface and filled with the first sealant, and a space is reserved between the other end of the second conductive paste and an outer edge of the electrochromic device and filled with the second sealant.

13. The electrochromic device according to claim 3, wherein an end face of the first conductive paste and an end of the first bus bar are in surface contact with an end face of the second conductive paste at a second interface.

14. The electrochromic device according to claim 1, wherein the electrochromic layer comprises an ion storage layer, an electrolyte layer, and a color-changing material layer, which are sequentially stacked, the ion storage layer being disposed on a side close to the first conductive layer, or the color-changing material layer being disposed on a side close to the first conductive layer.

15. The electrochromic device according to claim 1, wherein a first optical glue layer is disposed between the first substrate layer and the encapsulation layer, wherein the first optical glue layer is closely attached to the first substrate layer.

16. The electrochromic device according to claim 1, wherein a second optical glue layer is interposed between the encapsulation layer and the second substrate layer, wherein the second optical glue layer is closely attached to the second substrate layer.

17. The electrochromic device according to claim 1, characterized in that said first and/or second substrate layer is a water oxygen barrier film.

18. The electrochromic device of claim 1, wherein the first and/or second substrate layers are appearance textured films.

19. The electrochromic device according to claim 1, wherein the first and second conductive pastes are silver pastes.

20. A method of making an electrochromic device according to any one of claims 1 to 19, characterized in that said method of making comprises:

the preparation method of the first conduction region comprises the following steps: cutting a first groove from one side of the second substrate layer, wherein the second substrate layer, the second conductive layer and the electrochromic layer in the first groove are all removed; filling first conductive paste in the first groove, and filling first sealant on the surface of the first conductive paste; arranging a second base material layer on the outer side of the second base layer to form the first conducting area;

the preparation method of the second conduction region comprises the following steps: cutting a second groove from one side of the first substrate layer, wherein the first substrate layer, the first conductive layer and the electrochromic layer in the second groove are all removed; filling second conductive paste in the second groove, and filling second sealant on the surface of the second conductive paste; arranging a first substrate layer on the outer side of the first substrate layer to form the second conduction region;

the first groove divides the second base layer and the second conducting layer into two areas which are not in contact with each other, and the second base layer and the second conducting layer corresponding to the second conducting area are respectively used as a third base layer and a third conducting layer; the second conductive paste is in contact with the first conductive paste.

21. The method of manufacturing of claim 20, wherein the method of manufacturing the first conduction region further comprises: and after a second base material layer is arranged on the outer side of the second base layer, curing the first sealant.

22. The method of manufacturing of claim 20, wherein the method of manufacturing the first conduction region further comprises: and after a first base material layer is arranged on the outer side of the first base layer, curing the second sealant.

23. The method of claim 20, wherein step (ii) further comprises: after the first conduction region is prepared, turning over the electrochromic lamination layer with the formed first conduction region to prepare the second conduction region; or after the second conduction region is prepared, turning over the electrochromic lamination layer with the second conduction region to prepare the first conduction region.

24. The method of claim 20, wherein in the electrochromic stack prepared in step (i), the outer surface of the first substrate layer is further provided with a first optical adhesive layer and a first back film, and the outer surface of the second substrate layer is further provided with a second optical adhesive layer and a second back film;

in the step (ii), the step of providing the first base layer on the outer side of the first base layer includes removing the first back film, and attaching the first base layer to the first optical adhesive layer;

25. The method of claim 20, wherein after step (ii), the electrochromic stack adjacent to the outside of the second conductive area is cut along the edge of the second sealant.