An electrochromic device having an edge protection structure

Abstract

This utility model discloses an electrochromic device with an edge protection structure, comprising, from top to bottom, a first substrate layer, a first conductive layer, an electrochromic film layer, a second conductive layer, and a second substrate layer. A first bus electrode and a second bus electrode are respectively disposed on the upper and lower sides of the edge of the electrochromic device. A first protective film and a second protective film are respectively disposed on the upper and lower edges of the electrochromic device. The outer side of the first protective film is attached to the upper surface of the first bus electrode, and the inner side is attached to the upper surface of the first substrate layer. The outer side of the second protective film is attached to the lower surface of the second bus electrode, and the inner side is attached to the lower surface of the second substrate layer. The first and second protective films of this device form an edge protection structure, which can effectively prevent the chemical substances in the intermediate layer from corroding the bus electrode, and at the same time prevent external moisture, oxygen, etc. from entering the interior of the electrochromic device, ensuring the high performance and long cycle life of the electrochromic device.

Description

Technical Field

[0001] This utility model belongs to the field of electrochromic technology, specifically relating to an electrochromic device with an edge protection structure. Background Technology

[0002] Electrochromic films, as a key component of electrochromic devices, typically consist of three functional layers: a charge storage layer, an electrolyte layer, and an electrochromic material layer. Their core principle—electrochromism—refers to the reversible electrochemical oxidation-reduction reaction that occurs when an electric field is applied, resulting in a reversible color change. By laminating these electrochromic films with materials such as glass through an interlayer (i.e., a film for bonding, such as PVB) on both sides, they can be integrated into electrochromic dimming glass. Electrochromic dimming glass can be applied to automotive sunroofs, side door windows, rear windshields, etc., providing effects such as sun shading, heat insulation, and privacy protection.

[0003] In actual automotive use, environments such as rain and high humidity can cause oxygen, moisture, and chemicals in the intermediate layer to seep into the electrochromic glass through the gaps around its edges, eroding the electrochromic film and severely affecting its performance and lifespan. Therefore, it is necessary to improve the design of electrochromic devices to mitigate the erosion of the electrochromic film. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an electrochromic device with an edge protection structure to address the shortcomings of the prior art. This structure can effectively prevent the chemical substances in the intermediate layer from corroding the busbar electrode, and at the same time prevent external moisture, oxygen and other substances from entering the interior of the electrochromic device, thereby further reducing the corrosion of the busbar electrode and the electrochromic device, thus ensuring the high performance and long cycle life of the electrochromic device.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an electrochromic device with an edge protection structure, comprising a first base layer, a first conductive layer, an electrochromic film layer, a second conductive layer, and a second base layer stacked sequentially from top to bottom. A first bus electrode and a second bus electrode are respectively disposed on the upper and lower sides of the edge of the electrochromic device. The electrochromic device is characterized in that a first protective film and a second protective film are respectively disposed on the upper and lower edges of the electrochromic device. The outer side of the first protective film is attached to the upper surface of the first bus electrode and the inner side is attached to the upper surface of the first base layer. The outer side of the second protective film is attached to the lower surface of the second bus electrode and the inner side is attached to the lower surface of the second base layer.

[0006] Preferably, both the first and second protective films are insulating films, which are polyethylene terephthalate films, polyimide films, polypropylene films, or polytetrafluoroethylene films. These insulating films have good optical transparency and present good visual effects.

[0007] Preferably, the first protective film includes a first protective layer and a second protective layer. The first protective layer is stacked on the upper surface of the second protective layer. The outer side of the second protective layer is applied to the upper surface of the first bus electrode, and the inner side is applied to the upper surface of the first substrate layer. The second protective film also includes a third protective layer and a fourth protective layer. The third protective layer is stacked on the upper surface of the fourth protective layer. The outer side of the third protective layer is applied to the lower surface of the second bus electrode, and the inner side is applied to the lower surface of the second substrate layer. The first and second protective layers, as well as the third and fourth protective layers, constitute a double-layer protective structure, which can achieve a better protective effect.

[0008] As a further preferred embodiment, the orthographic projection of the outer side of the first protective layer covers 0-300% of the width of the upper surface of the first bus electrode, the orthographic projection of the inner side of the first protective layer covers 5-150% of the width of the upper surface of the inner side of the second protective layer, the orthographic projection of the outer side of the fourth protective layer covers 0-300% of the width of the lower surface of the second bus electrode, and the orthographic projection of the inner side of the fourth protective layer covers 5-150% of the width of the lower surface of the inner side of the third protective layer.

[0009] As a further preferred embodiment, the outer edge of the first protective layer is integrally connected with the outer edge of the fourth protective layer, and the first and fourth protective layers cover the sides of the electrochromic device. This embodiment completely encloses the sides of the electrochromic device and also encloses the bus electrode, thereby completely isolating the electrochromic device from moisture, oxygen, and the chemicals in the intermediate layer.

[0010] As a further preferred embodiment, the outer edge of the first protective layer extends outward to form a first extension edge, and the outer edge of the fourth protective layer extends outward to form a second extension edge. The first extension edge is located above the second extension edge, and the first extension edge and the second extension edge are physically pressed together. This embodiment also provides good protection and facilitates the wiring and routing of the electrochromic device.

[0011] As a further preferred embodiment, the inner edge of the first protective layer located on the upper side of the electrochromic device is integrally connected and covers the entire upper surface of the first substrate layer, and the inner edge of the fourth protective layer located on the lower side of the electrochromic device is integrally connected and covers the entire lower surface of the second substrate layer. In this embodiment, the electrochromic device is completely encapsulated, and the protective effect is further optimized.

[0012] As a further preferred embodiment, conductive adhesive is provided on the top and / or bottom of the first bus electrode and the second bus electrode, respectively. The conductive adhesive facilitates the fixation of the first conductive layer, the second conductive layer, and the first and second bus electrodes; furthermore, it fixes the first and second bus electrodes to the edge protection structure, improving the stability and reliability of the edge protection structure.

[0013] As a further preferred embodiment, the first and fourth protective layers are respectively one of a waterproof adhesive layer, a waterproof tape layer, and a waterproof film layer; the second and third protective layers are respectively insulating film layers, wherein the insulating film layer is a polyethylene terephthalate film (PET), a polyimide film (PI), a polypropylene film (PP), or a polytetrafluoroethylene film (PTFE). The first and fourth protective layers mainly function to isolate moisture, while the second and third protective layers mainly function to isolate the chemical substances in the PVB (intermediate layer) from corroding the bus electrode. The aforementioned waterproof adhesive layer, waterproof tape layer, waterproof film layer, and insulating film layer possess good optical transparency, presenting a good visual effect.

[0014] Preferably, the upper edge of the second conductive layer is provided with a plurality of first grooves at intervals, and the lower edge of the first conductive layer is provided with a plurality of second grooves at intervals. The first grooves and second grooves are arranged to overlap along the edge of the electrochromic device. A portion of the first bus electrode is embedded in at least one first groove and electrically connected to the second conductive layer, and a portion of the second bus electrode is embedded in at least one second groove and electrically connected to the first conductive layer.

[0015] As a further preferred embodiment, a notch is provided between the adjacent first and second grooves, and the upper and lower sides of the notch are respectively covered by a first insulating layer and a second insulating layer. The two sides of the first insulating layer are respectively laid on the surfaces of the first base layer and the second conductive layer, and the two sides of the second insulating layer are respectively laid on the surfaces of the first conductive layer and the second base layer.

[0016] As a further preferred embodiment, a fifth protective layer is clamped between the sides of the first substrate layer, the first conductive layer, and the electrochromic film layer and the inner side of the first bus electrode. The outer side of the fifth protective layer overlaps with the lower surface of the first bus electrode and is pressed by the first bus electrode, while the inner side of the fifth protective layer is stacked on the upper surface of the first substrate layer and pressed by the first protective film. A sixth protective layer is clamped between the sides of the electrochromic film layer, the second conductive layer, and the second substrate layer and the inner side of the second bus electrode. The outer side of the sixth protective layer overlaps with the upper surface of the second bus electrode and is pressed by the second bus electrode, while the inner side of the sixth protective layer is stacked on the lower surface of the second substrate layer and pressed by the second protective film. The fifth protective layer mainly serves to eliminate the gap between the inner surface of the first bus electrode and the sidewall of the first groove, and the sixth protective layer mainly serves to eliminate the gap between the inner surface of the second bus electrode and the sidewall of the second groove, preventing water vapor and oxygen from entering the gaps, thereby improving the performance and long cycle life of the electrochromic device.

[0017] As a further preferred embodiment, the fifth and sixth protective layers are respectively one of a waterproof adhesive layer, a waterproof tape layer, a waterproof film layer, and an insulating film layer, wherein the insulating film layer is a polyethylene terephthalate film, a polyimide film, a polypropylene film, or a polytetrafluoroethylene film. The aforementioned waterproof adhesive layer, waterproof tape layer, waterproof film layer, and insulating film layer possess good optical transparency and exhibit excellent visual effects.

[0018] Compared with the prior art, the present invention has the following advantages: The present invention forms an edge protection structure by setting a first protective film and a second protective film on the upper edge and the lower edge of the electrochromic device, which can effectively prevent the chemical substances in the intermediate layer from corroding the busbar electrode. At the same time, it can prevent external water vapor, oxygen and other substances from entering the interior of the electrochromic device, further reducing the corrosion of the busbar electrode and the electrochromic device, thereby ensuring the high performance and long cycle life of the electrochromic device. Attached Figure Description

[0019] Figure 1 This is a top view of the electrochromic device in Example 1;

[0020] Figure 2 Enlarged Figure 1 AA section diagram;

[0021] Figure 3 Enlarged Figure 1 Middle BB section view;

[0022] Figure 4 To and Figure 1 A cross-sectional view of the electrochromic device in Example 2 at the same location as BB in the middle;

[0023] Figure 5 To and Figure 1 A cross-sectional view of the electrochromic device in Example 3 at the same location as BB in the middle;

[0024] Figure 6 To and Figure 1 A cross-sectional view of the electrochromic device in Example 4 at the same location as BB in the middle;

[0025] Figure 7 To and Figure 1 A cross-sectional view of the electrochromic device in Example 5 at the same location as BB in the middle;

[0026] Figure 8 This is a top view of the electrochromic device in Example 6;

[0027] Figure 9 Enlarged Figure 8 AA section diagram;

[0028] Figure 10 Enlarged Figure 8 Middle BB section view;

[0029] Figure 11 To and Figure 8 A cross-sectional view of the electrochromic device in Example 7 at the same location as BB in the middle;

[0030] Figure 12 To and Figure 8 A cross-sectional view of the electrochromic device in Example 8 at the same location as BB in the middle;

[0031] Figure 13 To and Figure 8 A cross-sectional view of the electrochromic device in Example 9 at the same location as BB in the middle;

[0032] Figure 14 To and Figure 8 A cross-sectional view of the electrochromic device in Example 10 at the same location as BB in the middle;

[0033] Figure 15 To and Figure 8 A cross-sectional view of the electrochromic device in Example 11 at the same location as BB in the middle;

[0034] Figure 16 To and Figure 8 A cross-sectional view of the electrochromic device in Example 12 at the same location as BB in the middle;

[0035] Figure 17 To and Figure 8 A cross-sectional view of the electrochromic device in Example 13 at the same location as BB in the middle;

[0036] Figure 18 To and Figure 8 A cross-sectional view of the electrochromic device in Example 14 at the same location as BB in the middle;

[0037] Figures 1-18 The specific reference numerals in the attached figures are as follows:

[0038] 1-First base layer, 2-First conductive layer, 21-Second groove, 3-Electrochromic film layer, 31-Notch, 32-First insulating layer, 33-Second insulating layer, 4-Second conductive layer, 41-First groove, 5-Second base layer, 61-First bus electrode, 62-Second bus electrode, 63-Lead electrode, 64-Conductive adhesive, 71-First protective layer, 72-Second protective layer, 73-Third protective layer, 74-Fourth protective layer, 75-First extension edge, 76-Second extension edge, 77-Fifth protective layer, 78-Sixth protective layer. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Components or structures not limited in this invention employ conventional techniques in the art.

[0040] The electrochromic device with edge protection structure in Example 1, such as Figures 1-3 As shown, the device includes a first base layer 1, a first conductive layer 2, an electrochromic film layer 3, a second conductive layer 4, and a second base layer 5 stacked sequentially from top to bottom. A first bus electrode 61 and a second bus electrode 62 are respectively disposed on the upper and lower sides of the outer edge of the electrochromic film layer 3. The first bus electrode 61 and the second bus electrode 62 are respectively electrically connected to an external power supply via lead-out electrodes 63. A first protective film and a second protective film are respectively disposed on the upper and lower edges of the electrochromic device. The first protective film includes a first protective layer 71 and a second protective layer 72. The first protective layer 71 is stacked on the upper surface of the second protective layer 72. The outer side of the second protective layer 72 is attached to the upper surface of the first bus electrode 61, and the inner side is attached to the upper surface of the first base layer 1. The second protective film includes a third protective layer 73 and a fourth protective layer 74. The third protective layer 73 is stacked on the upper surface of the fourth protective layer 74. The outer side of the third protective layer 73 is attached to the lower surface of the second bus electrode 62, and the inner side is attached to the lower surface of the second base layer 5.

[0041] In Embodiment 1, a plurality of first grooves 41 are spaced apart on the upper edge of the second conductive layer 4, and a plurality of second grooves 21 are spaced apart on the lower edge of the first conductive layer 2. Specifically, the number of first grooves 41 and second grooves 21 can be one, two, or more, respectively. The first grooves 41 and second grooves 21 are overlapped along the edge of the electrochromic device. A portion of the first bus electrode 61 is embedded in at least one first groove 41 and electrically connected to the second conductive layer 4. A portion of the second bus electrode 62 is embedded in at least one second groove 21 and electrically connected to the first conductive layer 2. A notch 31 is provided between adjacent first grooves 41 and second grooves 21. The upper and lower sides of the notch 31 are covered by a first insulating layer 32 and a second insulating layer 33, respectively. The two sides of the first insulating layer 32 are respectively laid on the surfaces of the first base layer 1 and the second conductive layer 2, respectively. The two sides of the second insulating layer 33 are respectively laid on the surfaces of the first conductive layer 2 and the second base layer 5.

[0042] In Embodiment 1, the outer side of the second protective layer 72 extends to the outer side of the first bus electrode 61, that is, the outer side of the second protective layer 72 covers the first bus electrode 61. The orthographic projection of the outer side of the first protective layer 71 completely covers the upper surface of the first bus electrode 61, and the outer side of the first protective layer 71 is flush with the outer side of the second protective layer 72. The orthographic projection of the inner side of the first protective layer 71 covers 150% of the width of the upper surface of the inner side of the second protective layer 72. The outer side of the third protective layer 73 extends to the outer side of the second bus electrode 62, that is, the outer side of the third protective layer 73 covers the second bus electrode 62. The orthographic projection of the outer side of the fourth protective layer 74 completely covers the lower surface of the second bus electrode 62, and the outer side of the third protective layer 73 is flush with the outer side of the fourth protective layer 74. The orthographic projection of the inner side of the fourth protective layer 74 covers 150% of the width of the lower surface of the inner side of the third protective layer 73.

[0043] The electrochromic device with an edge protection structure in Example 2 differs from that in Example 1 in that, as... Figure 4 As shown, conductive adhesive 64 is provided on the top and bottom of the first bus electrode 61 and the second bus electrode 62, respectively.

[0044] The electrochromic device with an edge protection structure in Example 3 differs from that in Example 1 in that, as... Figure 5 As shown, the outer edge of the first protective layer 71 is integrated with the outer edge of the fourth protective layer 74, and the first protective layer 71 and the fourth protective layer 74 cover the side of the electrochromic device.

[0045] The electrochromic device with an edge protection structure in Example 4 differs from that in Example 1 in that, as... Figure 6As shown, the outer edge of the first protective layer 71 extends outward to form a first extension edge 75, and the outer edge of the fourth protective layer 74 extends outward to form a second extension edge 76. The first extension edge 75 is located above the second extension edge 76, and the first extension edge 75 and the second extension edge 76 are physically pressed together.

[0046] The electrochromic device with an edge protection structure in Example 5 differs from that in Example 4 in that, as... Figure 7 As shown, the inner edge of the first protective layer 71 located on the upper side of the electrochromic device is connected as one and covers the entire upper surface of the first base layer 1, and the inner edge of the fourth protective layer 74 located on the lower side of the electrochromic device is connected as one and covers the entire lower surface of the second base layer 5.

[0047] The electrochromic device with an edge protection structure in Example 6 differs from that in Example 1 in that, as... Figures 8-10 As shown, a fifth protective layer 77 is clamped between the side edges of the first base layer 1, the first conductive layer 2, and the electrochromic film layer 3 and the inner side edge of the first bus electrode 61. The outer side of the fifth protective layer 77 overlaps the lower surface of the first bus electrode 61 and is pressed by the first bus electrode 61. The inner side of the fifth protective layer 77 is stacked on the upper surface of the first base layer 1 and is pressed by the second protective layer 72. A sixth protective layer 78 is clamped between the side edges of the electrochromic film layer 3, the second conductive layer 4, and the second base layer 5 and the inner side edge of the second bus electrode 62. The outer side of the sixth protective layer 78 overlaps the upper surface of the second bus electrode 62 and is pressed by the second bus electrode 62. The inner side of the sixth protective layer 78 is stacked on the lower surface of the second base layer 5 and is pressed by the third protective layer 73.

[0048] The electrochromic device with an edge protection structure in Example 7 differs from that in Example 6 in that, as... Figure 11 As shown, the outer edge of the first protective layer 71 is integrated with the outer edge of the fourth protective layer 74, and the first protective layer 71 and the fourth protective layer 74 cover the side of the electrochromic device.

[0049] The electrochromic device with an edge protection structure in Example 8 differs from that in Example 6 in that, as... Figure 12 As shown, the outer edge of the first protective layer 71 extends outward to form a first extension edge 75, and the outer edge of the fourth protective layer 74 extends outward to form a second extension edge 76. The first extension edge 75 is located above the second extension edge 76, and the first extension edge 75 and the second extension edge 76 are physically pressed together.

[0050] The electrochromic device with an edge protection structure in Example 9 differs from that in Example 8 in that, as... Figure 13As shown, the inner edge of the first protective layer 71 located on the upper side of the electrochromic device is connected as one and covers the entire upper surface of the first base layer 1, and the inner edge of the fourth protective layer 74 located on the lower side of the electrochromic device is connected as one and covers the entire lower surface of the second base layer 5.

[0051] The electrochromic device with an edge protection structure in Example 10 differs from that in Example 1 in that, as... Figure 14 As shown, the orthographic projection of the outer side of the first protective layer 71 covers 0 of the width of the upper surface of the first bus electrode 61 (i.e., the orthographic projection of the outer side of the first protective layer 71 does not cover the upper surface of the first bus electrode 61), and the orthographic projection of the outer side of the fourth protective layer 74 covers 0 of the width of the lower surface of the second bus electrode 62 (i.e., the orthographic projection of the outer side of the fourth protective layer 74 does not cover the lower surface of the second bus electrode 62).

[0052] The electrochromic device with an edge protection structure in Example 11 differs from that in Example 1 in that, as Figure 15 As shown, the orthographic projection of the outer side of the first protective layer 71 covers 50% of the width of the upper surface of the first bus electrode 61, and the orthographic projection of the outer side of the fourth protective layer 74 covers 50% of the width of the lower surface of the second bus electrode 62.

[0053] The electrochromic device with an edge protection structure in Example 12 differs from that in Example 1 in that, as Figure 16 As shown, the orthographic projection of the outer side of the first protective layer 71 covers 100% of the width of the upper surface of the first bus electrode 61 (i.e., the outer side of the first protective layer 71 is flush with the outer side of the first bus electrode 61), and the orthographic projection of the outer side of the fourth protective layer 74 covers 100% of the width of the lower surface of the second bus electrode 62 (i.e., the outer side of the second bus electrode 62 is flush with the outer side of the fourth protective layer 74).

[0054] The electrochromic device with an edge protection structure in Example 13 differs from that in Example 1 in that, as Figure 17 As shown, the orthographic projection of the inner side of the first protective layer 71 does not completely cover the upper surface of the inner side of the second protective layer 72, and the orthographic projection of the inner side of the fourth protective layer 74 does not completely cover the lower surface of the inner side of the third protective layer 73.

[0055] The electrochromic device with an edge protection structure in Example 14 differs from that in Example 1 in that, as... Figure 18As shown, the orthographic projection of the inner side of the first protective layer 71 covers 100% of the width of the upper surface of the inner side of the second protective layer 72 (i.e., the inner side of the first protective layer 71 is flush with the inner side of the second protective layer 72), and the orthographic projection of the inner side of the fourth protective layer 74 covers 100% of the width of the lower surface of the inner side of the third protective layer 73 (i.e., the inner side of the third protective layer 73 is flush with the inner side of the fourth protective layer 74).

[0056] In the above embodiments, the first substrate layer 1 and the second substrate layer 5 are both made of polyethylene terephthalate (PET) film; the first conductive layer 2 and the second conductive layer 4 are both made of indium tin oxide (ITO); the electrochromic film layer 3 has a three-layer structure, consisting of a charge storage layer (IS), an electrolyte layer (EL), and an electrochromic material layer (EC) from top to bottom; the lead electrode 63 is made of materials including but not limited to copper, FPC, platinum, gold, and silver; the first bus electrode 61 and the second bus electrode 62 are made of materials including but not limited to copper foil, platinum, gold, and silver; the first protective layer 71 and the fourth protective layer 74 are both waterproof adhesive layers and waterproof tape. The layers are either waterproof adhesive layers or waterproof membrane layers. The waterproof adhesive layer is formed by applying liquid or paste-like waterproof coating and then curing it to form a film. The waterproof tape layer is a solid tape with one side stickiness and in the form of a strip. The waterproof membrane layer is a roll of solid film with both sides stickiness. The second protective layer 72, the third protective layer 73, the fifth protective layer 77, and the sixth protective layer 78 are all insulating film layers. Specifically, the second protective layer 72, the third protective layer 73, the fifth protective layer 77, and the sixth protective layer 78 can be made of insulating films such as polyethylene terephthalate film (PET), polyimide film (PI), polypropylene film (PP), and polytetrafluoroethylene film (PTFE).

Claims

1. An electrochromic device with an edge protection structure, comprising, from top to bottom, a first substrate layer, a first conductive layer, an electrochromic film layer, a second conductive layer, and a second substrate layer, wherein a first bus electrode and a second bus electrode are respectively disposed on the upper and lower sides of the edge of the electrochromic device, characterized in that, The electrochromic device has a first protective film and a second protective film on its upper and lower edges, respectively. The outer side of the first protective film is attached to the upper surface of the first bus electrode and the inner side is attached to the upper surface of the first substrate layer. The outer side of the second protective film is attached to the lower surface of the second bus electrode and the inner side is attached to the lower surface of the second substrate layer.

2. The electrochromic device with an edge protection structure according to claim 1, characterized in that, Both the first protective film and the second protective film are insulating films, which are polyethylene terephthalate films, polyimide films, polypropylene films, or polytetrafluoroethylene films.

3. The electrochromic device with an edge protection structure according to claim 1, characterized in that, The first protective film includes a first protective layer and a second protective layer. The first protective layer is stacked on the upper surface of the second protective layer. The outer side of the second protective layer is attached to the upper surface of the first bus electrode, and the inner side is attached to the upper surface of the first base layer. The second protective film includes a third protective layer and a fourth protective layer. The third protective layer is stacked on the upper surface of the fourth protective layer. The outer side of the third protective layer is attached to the lower surface of the second bus electrode, and the inner side is attached to the lower surface of the second base layer.

4. The electrochromic device with an edge protection structure according to claim 3, characterized in that, The orthographic projection of the outer side of the first protective layer covers 0-300% of the width of the upper surface of the first bus electrode; the orthographic projection of the inner side of the first protective layer covers 5-150% of the width of the upper surface of the inner side of the second protective layer; the orthographic projection of the outer side of the fourth protective layer covers 0-300% of the width of the lower surface of the second bus electrode; and the orthographic projection of the inner side of the fourth protective layer covers 5-150% of the width of the lower surface of the inner side of the third protective layer.

5. The electrochromic device with an edge protection structure according to claim 3, characterized in that, The outer edge of the first protective layer is integrated with the outer edge of the fourth protective layer, and the first and fourth protective layers cover the sides of the electrochromic device.

6. The electrochromic device with an edge protection structure according to claim 3, characterized in that, The outer edge of the first protective layer extends outward to form a first extension edge, and the outer edge of the fourth protective layer extends outward to form a second extension edge. The first extension edge is located above the second extension edge, and the first extension edge and the second extension edge are physically pressed together.

7. The electrochromic device with an edge protection structure according to claim 6, characterized in that, The inner edge of the first protective layer located on the upper side of the electrochromic device is connected as one and covers the entire upper surface of the first substrate layer, and the inner edge of the fourth protective layer located on the lower side of the electrochromic device is connected as one and covers the entire lower surface of the second substrate layer.

8. The electrochromic device with an edge protection structure according to claim 3, characterized in that, Conductive adhesive is provided on the top and / or bottom of the first bus electrode and the second bus electrode, respectively.

9. The electrochromic device with an edge protection structure according to claim 3, characterized in that, The first protective layer and the fourth protective layer are respectively one of a waterproof adhesive layer, a waterproof tape layer, and a waterproof film layer; the second protective layer and the third protective layer are respectively an insulating film layer, wherein the insulating film layer is a polyethylene terephthalate film, a polyimide film, a polypropylene film, or a polytetrafluoroethylene film.

10. An electrochromic device with an edge protection structure according to any one of claims 1-9, characterized in that, The upper edge of the second conductive layer is provided with a plurality of first grooves at intervals, and the lower edge of the first conductive layer is provided with a plurality of second grooves at intervals. The first grooves and the second grooves are arranged to overlap along the edge of the electrochromic device. A portion of the first bus electrode is embedded in at least one first groove and electrically connected to the second conductive layer, and a portion of the second bus electrode is embedded in at least one second groove and electrically connected to the first conductive layer.

11. The electrochromic device with an edge protection structure according to claim 10, characterized in that, A notch is provided between the first and second adjacent grooves on the left and right sides. The upper and lower sides of the notch are covered by a first insulating layer and a second insulating layer, respectively. The two sides of the first insulating layer are respectively laid on the surfaces of the first base layer and the second conductive layer, and the two sides of the second insulating layer are respectively laid on the surfaces of the first conductive layer and the second base layer.

12. The electrochromic device with an edge protection structure according to claim 10, characterized in that, A fifth protective layer is clamped between the side edges of the first substrate layer, the first conductive layer, and the electrochromic film layer and the inner side edge of the first bus electrode. The outer side of the fifth protective layer overlaps the lower surface of the first bus electrode and is pressed by the first bus electrode. The inner side of the fifth protective layer is stacked on the upper surface of the first substrate layer and is pressed by the first protective film. A sixth protective layer is clamped between the side edges of the electrochromic film layer, the second conductive layer, and the second substrate layer and the inner side edge of the second bus electrode. The outer side of the sixth protective layer overlaps the upper surface of the second bus electrode and is pressed by the second bus electrode. The inner side of the sixth protective layer is stacked on the lower surface of the second substrate layer and is pressed by the second protective film.

13. The electrochromic device with an edge protection structure according to claim 12, characterized in that, The fifth protective layer and the sixth protective layer are respectively one of a waterproof adhesive layer, a waterproof tape layer, a waterproof film layer and an insulating film layer, and the insulating film layer is a polyethylene terephthalate film, a polyimide film, a polypropylene film or a polytetrafluoroethylene film.

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