An electrochromic device

Abstract

The utility model discloses an electrochromic device, this electrochromic device includes first base layer, first conductive layer, electrochromic film layer, second conductive layer and second base layer, the upside of the edge of electrochromic device is equipped with first accommodating cavity, the first conductive glue solidification forms the first bus electrode in the first accommodating cavity filling, the side of first bus electrode and the side of first conductive layer contact, the downside of the edge of electrochromic device is equipped with second accommodating cavity, the second conductive glue solidification forms the second bus electrode in the second accommodating cavity filling, the side of second bus electrode and the side of second conductive layer contact. The utility model not only has saved the erasing step of time -consuming and easily leading to interlayer separation in traditional craft, has improved production efficiency significantly, and through the direct contact of conductive glue and corresponding conductive layer side realizes the stable and reliable electrical connection, effectively simplifies the device structure, improves the integrity and reliability of device overall structure.

Description

Technical Field

[0001] This utility model belongs to the field of electrochromic technology, and specifically relates to an electrochromic device. Background Technology

[0002] Electrochromic technology works by using an applied voltage to cause ions in the electrolyte layer to enter or leave the electrochromic material, resulting in oxidation or reduction reactions that cause the smart glass to switch between a transparent and dark state.

[0003] The structure of an electrochromic device consists of two transparent conductive layers, an electrochromic layer (EC layer), an electrolyte layer (EL layer), and a charge storage layer (IS layer). The three layers of material, namely the charge storage layer, the electrolyte layer, and the electrochromic layer, are sandwiched between the two transparent conductive layers. There is an interface between these three layers, and they are arranged in the order of charge storage layer, electrolyte layer, and electrochromic layer in space.

[0004] The structure of existing electrochromic devices is typically as follows: Figure 1 The cross-sectional view is shown. Figure 1 In the diagram, 1 represents the first substrate layer, 2 the first conductive layer, 3 the electrochromic film layer, 4 the second conductive layer, 5 the second substrate layer, 6 the first busbar, and 7 the second busbar. At least two exposed transparent conductive substrate portions are provided at the edge of the film to accommodate conductive materials. Different voltages are input to an external circuit via these conductive materials to adjust the color or transmittance. Specifically, a typical method involves a wiping process to remove one edge of the first substrate layer, the first conductive layer, and the electrochromic film layer to expose the second conductive layer, and then another wiping process to expose the first conductive layer. Copper foil or other conductive materials are then attached to the surfaces of the second and first conductive layers to form the first and second busbars, respectively. The first and second busbars constitute the bus electrode, with the first busbar electrically connected to the second conductive layer and the second busbar electrically connected to the first conductive layer. Because a wiping process is required to expose the clean surfaces of the first and second conductive layers, it is time-consuming and prone to causing layer separation. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an electrochromic device that addresses the shortcomings of the existing technology. This device not only eliminates the time-consuming and layer-separation-prone erasing step in traditional processes, significantly improving production efficiency, but also achieves a stable and reliable electrical connection through direct contact between the conductive adhesive and the side of the corresponding conductive layer. This effectively simplifies the device structure and enhances the integrity and reliability of the overall device structure.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an electrochromic device, which includes a first substrate layer, a first conductive layer, an electrochromic film layer, a second conductive layer, and a second substrate 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. A first receiving cavity is formed on the upper side of the edge of the electrochromic device, and the first receiving cavity is disposed through the thickness direction of the first substrate layer and the first conductive layer. The first bus electrode is disposed in the first receiving cavity, and the side of the first bus electrode is in contact with the side of the first conductive layer. A second receiving cavity is formed on the lower side of the edge of the electrochromic device, and the second receiving cavity is disposed through the thickness direction of the second substrate layer and the second conductive layer. The second receiving cavity is disposed in the second receiving cavity, and the side of the second bus electrode is in contact with the side of the second conductive layer.

[0007] Preferably, the first receiving cavity is filled with a first conductive adhesive, and the conductive adhesive layer formed after the first conductive adhesive cures is the first bus electrode. The second receiving cavity is filled with a second conductive adhesive, and the conductive adhesive layer formed after the second conductive adhesive cures is the second bus electrode. This design further simplifies the manufacturing process, eliminating the need for separate fabrication and installation of physical electrodes. The first and second bus electrodes are formed in one step through adhesive injection and curing, which not only further improves production efficiency but also effectively avoids poor contact or misalignment that may result from the introduction of independent electrode components.

[0008] As a further preferred embodiment, both the first conductive adhesive and the second conductive adhesive are silver paste, tin paste, or copper paste. In practical applications, other conductive adhesives with a certain degree of fluidity can also be used.

[0009] Preferably, the first receiving cavity includes a first channel disposed along one side of the electrochromic device, and the second receiving cavity includes a second channel disposed along the other side of the electrochromic device. The design of the first and second channels simplifies the grooving process and ensures that the conductive adhesive can form a continuous and stable bus electrode, thereby improving the reliability of the electrical connection.

[0010] As a further preferred embodiment, the electrochromic device has a first channel on its upper side, which extends through the thickness direction of the first substrate layer and the first conductive layer. The orthographic projection of the first channel on the horizontal plane is spaced inside the orthographic projection of the second channel on the horizontal plane. The electrochromic device also has a second channel on its lower side, which extends through the thickness direction of the second substrate layer and the second conductive layer. The orthographic projection of the second channel on the horizontal plane is spaced inside the orthographic projection of the first channel on the horizontal plane. By providing the first and second channels, physical isolation is achieved, preventing the first conductive adhesive from penetrating the electrochromic film layer and contacting the second conductive layer to form a short circuit, and also preventing the second conductive adhesive from penetrating the electrochromic film layer and contacting the first conductive layer to form a short circuit, thereby improving the reliability and yield of the electrochromic device.

[0011] Preferably, the first receiving cavity includes a plurality of first slots spaced apart along the edge of the electrochromic device, the first slots penetrating the thickness direction of the first substrate layer and the first conductive layer. The second receiving cavity includes a plurality of second slots spaced apart along the edge of the electrochromic device, the second slots penetrating the thickness direction of the second substrate layer and the second conductive layer. The plurality of first slots and the plurality of second slots are arranged alternately along the edge of the electrochromic device. In the above scheme, the distance between the first bus electrode and the second bus electrode, which serve as positive and negative electrodes, is shorter, reducing the internal resistance and driving voltage of the device, thereby helping to accelerate the electrochromic response speed and improve the color uniformity.

[0012] As a further preferred embodiment, the electrochromic device has a plurality of first annular channels on its upper side, each first annular channel penetrating the thickness direction of the first substrate layer and the first conductive layer. A first annular channel is spaced at the periphery of the orthographic projection of each first slot on the horizontal plane. The electrochromic device has a plurality of second annular channels on its lower side, each second annular channel penetrating the thickness direction of the second substrate layer and the second conductive layer. A second annular channel is spaced at the periphery of the orthographic projection of each second slot on the horizontal plane. The function of the first and second annular channels is to form physical isolation, preventing the first conductive adhesive filled in the first slot from penetrating the electrochromic film layer and contacting the second conductive layer to form a short circuit, and preventing the second conductive adhesive filled in the second slot from penetrating the electrochromic film layer and contacting the first conductive layer to form a short circuit, thereby improving the reliability and yield of the electrochromic device.

[0013] Compared with the prior art, the present invention has the following advantages: By setting a first receiving cavity and a second receiving cavity on the upper and lower sides of the edge of the electrochromic device to accommodate the first bus electrode and the second bus electrode, the present invention not only eliminates the time-consuming and layer-separation-prone erasing step in the traditional process, but also significantly improves production efficiency. At the same time, the direct contact between the side of the first bus electrode and the side of the first conductive layer, and the direct contact between the side of the second bus electrode and the side of the second conductive layer, achieves a stable and reliable electrical connection, effectively simplifying the device structure and improving the integrity and reliability of the overall device structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an existing electrochromic device; Figure 2 This is a top view of the electrochromic device in Example 1; Figure 3 for Figure 2 AA section diagram; Figure 4 This is a top view of the electrochromic device in Example 2; Figure 5 for Figure 4 Middle BB section view; Figure 6 This is a top view of the electrochromic device in Example 3; Figure 7 for Figure 6 C-section view; Figure 8 for Figure 6 Cross-sectional view of DD; Figure 9 This is a top view of the electrochromic device in Example 4; Figure 10 for Figure 9 EE cross-section diagram; Figure 11 for Figure 9 Middle FF cross section; Figures 1-11 The specific reference numerals in the attached figures are as follows: 1-First substrate layer, 2-First conductive layer, 3-Electrochromic film layer, 4-Second conductive layer, 5-Second substrate layer, 6-First bus electrode, 7-Second bus electrode, 81-First channel, 82-Second channel, 83-First trench, 84-Second trench, 85-First slot, 86-Second slot, 87-First annular channel, 88-Second annular channel. Detailed Implementation

[0015] 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.

[0016] The electrochromic device of Example 1, such as Figures 2-3 As shown, the device comprises, from top to bottom, 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. A first bus electrode 6 and a second bus electrode 7 are respectively disposed on the upper and lower sides of the edge of the electrochromic device. A first receiving cavity is formed on the upper side of the edge of the electrochromic device, penetrating the thickness direction of the first base layer 1 and the first conductive layer 2. The first receiving cavity includes a first channel 81 disposed along one side of the electrochromic device, and the first channel 81 is filled with a first conductive adhesive. The conductive adhesive layer formed after the first conductive adhesive cures is the first bus electrode 6. The side of the first bus electrode 6 contacts the side of the first conductive layer 2. A second receiving cavity is formed on the lower side of the edge of the electrochromic device. The second receiving cavity is disposed through the thickness direction of the second base layer 5 and the second conductive layer 4. The second receiving cavity includes a second channel 82 disposed along the other side of the electrochromic device. The second channel 82 is filled with a second conductive adhesive. The conductive adhesive layer formed after the second conductive adhesive is cured is the second bus electrode 7. The side of the second bus electrode 7 contacts the side of the second conductive layer 4. The first bus electrode 6 and the second bus electrode 7 are electrically connected to an external power supply through lead-out electrodes (not shown in the figure). In Embodiment 1, both the first conductive adhesive and the second conductive adhesive can be silver paste, tin paste, or copper paste.

[0017] The electrochromic device of Example 2 differs from that of Example 1 in that, in Example 2, as... Figures 4-5 As shown, the electrochromic device has a first channel 83 on its upper side, which extends through the thickness direction of the first substrate layer 1 and the first conductive layer 2. The orthographic projection of the first channel 83 on the horizontal plane is spaced inside the orthographic projection of the second channel 82 on the horizontal plane. The electrochromic device has a second channel 84 on its lower side, which extends through the thickness direction of the second substrate layer 5 and the second conductive layer 4. The orthographic projection of the second channel 84 on the horizontal plane is spaced inside the orthographic projection of the first channel 81 on the horizontal plane.

[0018] The electrochromic device of Example 3 differs from that of Example 1 in that, in Example 3, as... Figures 6-8As shown, the first receiving cavity includes a plurality of first slots 85 spaced apart along the edge of the electrochromic device. The first slots 85 are disposed through the thickness direction of the first substrate layer 1 and the first conductive layer 2. The second receiving cavity includes a plurality of second slots 86 spaced apart along the edge of the electrochromic device. The second slots 86 are disposed through the thickness direction of the second substrate layer 5 and the second conductive layer 4. The plurality of first slots 85 and the plurality of second slots 86 are arranged alternately along the edge of the electrochromic device.

[0019] The electrochromic device of Example 4 differs from that of Example 3 in that, in Example 4, as... Figures 9-11 As shown, the electrochromic device has a plurality of first annular channels 87 on its upper side. Each first annular channel 87 is arranged through the thickness direction of the first substrate layer 1 and the first conductive layer 2. Each first slot 85 is provided with a first annular channel 87 at intervals around its orthographic projection on the horizontal plane. The electrochromic device has a plurality of second annular channels 88 on its lower side. Each second annular channel 88 is arranged through the thickness direction of the second substrate layer 5 and the second conductive layer 4. Each second slot 86 is provided with a second annular channel 88 at intervals around its orthographic projection on the horizontal plane.

Claims

1. An electrochromic device, 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, A first receiving cavity is formed on the upper side of the edge of the electrochromic device. The first receiving cavity is disposed through the thickness direction of the first substrate layer and the first conductive layer. A first bus electrode is disposed in the first receiving cavity, and the side of the first bus electrode is in contact with the side of the first conductive layer. A second receiving cavity is formed on the lower side of the edge of the electrochromic device. The second receiving cavity is disposed through the thickness direction of the second substrate layer and the second conductive layer. A second bus electrode is disposed in the second receiving cavity, and the side of the second bus electrode is in contact with the side of the second conductive layer.

2. The electrochromic device according to claim 1, characterized in that, The first cavity is filled with a first conductive adhesive, and the conductive adhesive layer formed after the first conductive adhesive cures is the first bus electrode. The second cavity is filled with a second conductive adhesive, and the conductive adhesive layer formed after the second conductive adhesive cures is the second bus electrode.

3. The electrochromic device according to claim 2, characterized in that, Both the first conductive adhesive and the second conductive adhesive are silver paste, tin paste or copper paste.

4. An electrochromic device according to any one of claims 1-3, characterized in that, The first receiving cavity includes a first channel disposed along one side of the electrochromic device, and the second receiving cavity includes a second channel disposed along the other side of the electrochromic device.

5. The electrochromic device according to claim 4, characterized in that, The electrochromic device has a first channel on its upper side, which extends through the thickness direction of the first substrate layer and the first conductive layer. The orthographic projection of the first channel on the horizontal plane is spaced inside the orthographic projection of the second channel on the horizontal plane. The electrochromic device has a second channel on its lower side, which extends through the thickness direction of the second substrate layer and the second conductive layer. The orthographic projection of the second channel on the horizontal plane is spaced inside the orthographic projection of the first channel on the horizontal plane.

6. An electrochromic device according to any one of claims 1-3, characterized in that, The first receiving cavity includes a plurality of first slots spaced apart along the edge of the electrochromic device, the first slots penetrating the thickness direction of the first substrate layer and the first conductive layer. The second receiving cavity includes a plurality of second slots spaced apart along the edge of the electrochromic device, the second slots penetrating the thickness direction of the second substrate layer and the second conductive layer. The plurality of first slots and the plurality of second slots are alternately arranged along the edge of the electrochromic device.

7. The electrochromic device according to claim 6, characterized in that, The electrochromic device has a plurality of first annular channels on its upper side, each of which penetrates the thickness direction of the first substrate layer and the first conductive layer. Each first slot is provided with a first annular channel at intervals around its orthographic projection on the horizontal plane. The electrochromic device has a plurality of second annular channels on its lower side, each of which penetrates the thickness direction of the second substrate layer and the second conductive layer. Each second slot is provided with a second annular channel at intervals around its orthographic projection on the horizontal plane.

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