Intelligent photovoltaic curtain wall with color-changing function

Abstract

The application relates to a smart photovoltaic curtain wall with a color-changing function, comprising a photovoltaic power generation assembly, an electrochromic glass assembly and an electric controller; the photovoltaic power generation assembly comprises a semiconductor plate and a current detector; the electrochromic glass assembly comprises an electrochromic glass plate; the electric controller is used for controlling the voltage applied to the electrochromic glass plate according to the current detected by the current detector; when the change value of the current of the first wire is within the current preset value, or when the change value of the current of the first wire exceeds the current preset value and does not last for a first preset time, the voltage applied to the electrochromic glass plate is not changed. The smart photovoltaic curtain wall can reduce the transparency change frequency of the color-changing glass, prolong the service life of the electrochromic glass and improve the human eye visual comfort of indoor light.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic curtain walls, and more specifically to an intelligent photovoltaic curtain wall with color-changing function. Background Technology

[0002] With the increasing demand for energy-efficient and intelligent buildings, smart photovoltaic (PV) curtain walls, as a new type of building envelope, have gradually attracted widespread attention. They not only convert solar energy into electricity, providing clean energy for buildings, but also possess a variety of innovative functions. For example, smart PV curtain walls with color-changing capabilities integrate color-changing glass technology into traditional PV curtain walls, achieving an organic combination of power generation and shading functions, providing a more effective solution for building energy conservation and indoor environment optimization.

[0003] Photovoltaic modules in photovoltaic (PV) curtain walls utilize transparent or opaque semiconductor materials such as crystalline silicon, cadmium telluride, copper indium gallium selenide (CIGS), and gallium arsenide (GaAs) with high photoelectric conversion efficiency. These modules can stably convert solar energy into electrical energy under varying lighting conditions. The layout of PV modules can be optimized based on building design and sunlight direction. Different numbers and specifications of PV modules can be installed in different orientations of the curtain wall to fully utilize sunlight from all directions.

[0004] Photovoltaic curtain walls can be combined with electrochromic glass. Under the influence of an electric field, the optical properties of electrochromic glass can undergo reversible changes, switching between different transparent states. By adjusting the electric field of the electrochromic glass, its transmittance can be reduced when sunlight is strong, effectively blocking excessive sunlight from entering the room, thus serving as shading and regulating indoor temperature; conversely, when the light intensity is low, the transmittance of the electrochromic glass increases, ensuring sufficient natural light indoors.

[0005] In existing smart photovoltaic curtain walls with color-changing functions, the photovoltaic function and the color-changing glass function of some curtain walls are controlled separately and independently, and the transparency of the color-changing glass cannot be intelligently adjusted. Some curtain walls can adjust the transparency of the color-changing glass according to the intensity of photovoltaic current, but in weather conditions with rapid changes in sunshine and overcast skies, the photovoltaic current changes rapidly, which can easily lead to frequent changes in the transparency of the color-changing glass, affecting the lifespan of the color-changing glass, especially electrochromic glass, and affecting the visual comfort of the human eye when light enters the room. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a smart photovoltaic curtain wall with color-changing function. This smart photovoltaic curtain wall can reduce the frequency of changes in the transparency of the color-changing glass, improve the lifespan of the electrochromic glass, and improve the visual comfort of indoor lighting.

[0007] To achieve the objectives of this invention, a smart photovoltaic curtain wall with color-changing function is provided, comprising a photovoltaic power generation module, an electrochromic glass module, and an electronic controller; the photovoltaic power generation module includes a battery, a semiconductor board, a first wire, and a current detector, the semiconductor board facing outdoors to receive solar radiation, the first wire connecting the battery and the semiconductor board, and the current detector for detecting the current in the first wire; the electrochromic glass module includes an electrochromic glass plate facing the semiconductor board, the electrochromic glass plate not obstructing the semiconductor board, and the electrochromic glass plate being responsive to voltage applied to it. The voltage changes and switches between different levels of transparency; the controller controls the voltage applied to the first electrochromic glass plate according to the current of the first wire detected by the current detector: when the change value of the current of the first wire exceeds the current preset value and exceeds the current preset value for a first preset time, the controller controls the voltage applied to the electrochromic glass plate to change, thereby changing the transparency of the electrochromic glass plate; when the change value of the current of the first wire is within the current preset value, or when the change value of the current of the first wire exceeds the current preset value but does not last for the first preset time, the controller controls the voltage applied to the electrochromic glass plate to remain unchanged.

[0008] In some embodiments of the present invention, the electronic controller is further configured to adjust the preset current value and the first preset time according to the outdoor temperature and the transparency of the electrochromic glass plate.

[0009] In some embodiments of the present invention, when the outdoor temperature is greater than a first preset temperature value and the electrochromic glass plate is in a state of low transparency, the preset current value and / or the first preset time are increased.

[0010] In some embodiments of the present invention, when the outdoor temperature is greater than a first preset temperature value and the electrochromic glass plate is in a state of high transparency, the preset current value and / or the first preset time are reduced.

[0011] In some embodiments of the present invention, when the outdoor temperature is at a first preset temperature value and a second preset temperature value, the current preset value is a default current value, and the first preset time is a default time; the second preset temperature value is less than the first preset temperature value.

[0012] In some embodiments of the present invention, when the outdoor temperature is less than a second preset temperature value and the electrochromic glass plate is in a state of high transparency, the preset current value and / or the preset time are increased.

[0013] In some embodiments of the present invention, when the outdoor temperature is less than a second preset temperature value and the electrochromic glass plate is in a state of low transparency, the preset current value and / or the preset time are reduced.

[0014] In some embodiments of the present invention, the outdoor temperature is measured by an outdoor temperature detector that is separated from the photovoltaic power generation module and the electrochromic glass module; or, the outdoor temperature is obtained from a remote server.

[0015] In some embodiments of the present invention, the electronic controller is further configured to determine the current preset value and the adjustment range of the first preset time based on the change trend of the outdoor temperature and the change trend of the current within a second preset time period.

[0016] In some embodiments of the present invention, when the trend of change of outdoor temperature and the trend of change of current are highly similar, the adjustment range of the current preset value and the first preset time is a first amplitude value.

[0017] In some embodiments of the present invention, when the trend of change of outdoor temperature and the trend of change of current are not very similar, the adjustment range of the current preset value and the first preset time is a second amplitude value, which is smaller than the first amplitude value.

[0018] In some embodiments of the present invention, the second preset time is greater than the first preset time.

[0019] In some embodiments of the present invention, the electrochromic glass plate is divided into a first state, a second state, and a third state according to the degree of transparency from transparent to opaque; after the electrochromic glass assembly is started, the electronic controller is used to determine, based on the average current value of the first wire during a third preset time period, whether the average current value is in a first interval, a second interval, or a third interval where the current value gradually increases, and accordingly apply a first voltage, a second voltage, or a third voltage to the first electrochromic glass plate so that the electrochromic glass plate is in the first state, the second state, or the third state.

[0020] In some embodiments of the present invention, the third preset time is less than the first preset time.

[0021] In some embodiments of the invention, the voltage applied to the electrochromic glass plate is provided by the battery or by the power grid.

[0022] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0023] The intelligent photovoltaic curtain wall with color-changing function provided by this invention can control the voltage applied to the first electrochromic glass plate according to the current of the photovoltaic power generation module. Specifically, when the change value of the current exceeds the current preset value and exceeds the current preset value for a first preset time, the voltage applied to the electrochromic glass plate is controlled to change, thereby changing the transparency of the electrochromic glass plate; when the change value of the current exceeds the current preset value and exceeds the current preset value for a first preset time, the voltage applied to the electrochromic glass plate is controlled to change, thereby changing the transparency of the electrochromic glass plate; when the change value of the current of the first wire is within the current preset value, or when the change value of the current of the first wire exceeds the current preset value but does not last for the first preset time, the voltage applied to the electrochromic glass plate remains unchanged. By limiting the frequent color changes of the electrochromic glass plate through the amplitude and duration of current changes, it is beneficial to improve the lifespan of the electrochromic glass and improve the visual comfort of indoor lighting. Attached Figure Description

[0024] Figure 1 This is a control flowchart of an embodiment of the intelligent photovoltaic curtain wall with color-changing function of the present invention.

[0025] Figure 2 This is a structural schematic diagram of an embodiment of the intelligent photovoltaic curtain wall with color-changing function of the present invention.

[0026] Figure 3 This is a schematic diagram of another embodiment of the intelligent photovoltaic curtain wall with color-changing function of the present invention.

[0027] In the diagram, 11-battery, 12-semiconductor board, 13-first wire, 14-current detector, 21-electrochromic glass plate, 30-electronic controller, 40-outdoor temperature detector.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0029] like Figures 1 to 3 As shown, the present invention provides a smart photovoltaic curtain wall with color-changing function. This smart photovoltaic curtain wall can be used on the surface of buildings. It can not only realize photovoltaic power generation, but also use the electrical energy for the electrical load inside the building, and also for powering the electrochromic glass. It uses clean energy, which is safe and environmentally friendly. This smart photovoltaic curtain wall can also be used to block sunlight and regulate indoor natural light.

[0030] Specifically, the smart photovoltaic curtain wall includes photovoltaic power generation modules, electrochromic glass modules, and an electronic controller 30. The photovoltaic power generation modules are used to generate electricity using solar energy, the electrochromic glass modules are used to regulate indoor light, and the electronic controller 30 is used to control the operating status of the electrochromic glass modules based on the power generation parameters of the photovoltaic power generation modules.

[0031] The photovoltaic power generation module includes a battery 11, a semiconductor plate 12, a first wire 13, and a current detector 14. The semiconductor plate 12 faces outdoors to receive solar radiation. The semiconductor plate 12 exhibits a photoelectric effect, generating holes and electrons under solar radiation, thereby producing current. The first wire 13 connects the battery 11 and the semiconductor plate 12, transmitting current to the battery 11 for energy storage. The battery 11 stores electrical energy, facilitating the processing and application of surplus photovoltaic power. The current detector 14 detects the current in the first wire 13. The output current of the semiconductor plate 12 is closely related to the light intensity; the stronger the light, the more electron-hole pairs are excited in the semiconductor plate 12, resulting in a larger current. By detecting the current in real time, the current light intensity can be reflected.

[0032] The electrochromic glass assembly includes an electrochromic glass plate 21 facing the same direction as the semiconductor plate 12, such that the light intensity received by the semiconductor plate 12 is comparable to the light intensity faced by the electrochromic glass assembly. The electrochromic glass plate 21 does not obstruct the semiconductor plate 12; that is, the color change of the electrochromic glass plate 21 does not affect the power generation of the semiconductor plate 12. The electrochromic glass plate 21 can switch between different levels of transparency according to changes in the voltage applied to it. The electrochromic glass plate 21 can be made of materials such as PDLC and EC. By using multiple materials or multilayer materials, various levels of transparency can be achieved. These commonly used electrochromic materials have a limited lifespan. After excessive use, irreversible changes in molecular orientation or isomerization occur, leading to the loss of electrochromic function.

[0033] The arrangement of photovoltaic power generation modules and electrochromic glass modules can be as follows: Figure 2 As shown, the semiconductor plate 12 and the electrochromic glass module of the photovoltaic power generation module are arranged side by side on the surface facing the light. The photovoltaic power generation module and the electrochromic glass module do not overlap, and the color change of the electrochromic glass module does not affect the power generation of the photovoltaic power generation module. Alternatively, as shown... Figure 3As shown, the semiconductor plate 12 and the electrochromic glass module of the photovoltaic power generation module are arranged overlapping in the direction of light illumination. The semiconductor plate 12 covers the outside of the electrochromic glass module. The semiconductor plate 12 can be made of transparent semiconductor material and does not affect light transmission. There is a gap between the semiconductor plate 12 and the electrochromic glass module. This gap can prevent the heat generated by the semiconductor plate 12 from being conducted to the electrochromic glass module. This gap can have a ventilation function to facilitate heat dissipation of the semiconductor plate 12 of the photovoltaic power generation module. At the same time, this gap also facilitates the later replacement and maintenance of the semiconductor plate 12 and the electrochromic glass module.

[0034] The electronic controller 30 is used to control the voltage applied to the first electrochromic glass plate 21 based on the current of the first wire 13 detected by the current detector 14.

[0035] Specifically, such as Figure 1 As shown, when the change in current of the first wire 13 exceeds the preset current value and remains above the preset current value for a first preset time, it indicates that the light intensity is continuously increasing or decreasing. At this time, the voltage applied to the electrochromic glass plate 21 is controlled to change the transparency of the electrochromic glass plate 21. When the current of the first wire 13 increases beyond the preset current value and remains above the preset current value for a first preset time, it indicates that the light intensity is indeed increasing, and the current change is not due to occasional cloud cover or other reasons. At this time, the voltage on the electrochromic glass plate 21 can be adjusted to make the electrochromic glass plate 21 more opaque, better blocking sunlight as the light intensity changes. Conversely, when the current of the first wire 13 decreases beyond the preset current value and remains below the preset current value for a first preset time, it indicates that the light intensity is indeed decreasing. At this time, the voltage on the electrochromic glass plate 21 can be adjusted to make the electrochromic glass plate 21 more transparent, better providing natural light to the room.

[0036] When the change in current of the first wire 13 is within the preset current value, it indicates that the change in light intensity is not significant. Or when the change in current of the first wire 13 exceeds the preset current value but does not last for the first preset time, it indicates that the change in light intensity may be due to occasional cloud cover. In this case, the voltage applied to the electrochromic glass plate 21 is kept constant, so that the electrochromic glass plate 21 does not change color frequently, thereby improving the lifespan of the electrochromic glass plate 21 and reducing unnatural changes in indoor light, thus improving visual comfort.

[0037] In some examples, the controller 30 is also used to adjust a preset current value and a first preset time based on the outdoor temperature and the transparency of the electrochromic glass panel 21. The transparency of the electrochromic glass panel 21 is related to the voltage applied to it, and the transparency can be determined using the voltage applied to it. That is, adjusting the preset current value and the first preset time based on the outdoor temperature and the transparency of the electrochromic glass panel 21 can be achieved by adjusting the preset current value and the first preset time based on the outdoor temperature and the voltage applied to it.

[0038] In some examples, when the outdoor temperature is higher than a first preset temperature value and the electrochromic glass panel 21 is in a low transparency state, the preset current value and / or the first preset time are increased. At this time, the outdoor temperature is high and the sunlight is usually strong. In this temperature range, the indoor light adjustment is mainly for cooling. Even when the outdoor light intensity is occasionally reduced due to temporary cloud cover or other reasons, the outdoor temperature is still high. Therefore, increasing the preset value or duration of the current change allows the electrochromic glass panel 21 to remain in a low transparency state for a longer period of time, which is beneficial for reducing the indoor temperature and also reduces the color-changing frequency of the electrochromic glass panel 21.

[0039] In some examples, when the outdoor temperature is higher than a first preset temperature value and the electrochromic glass panel 21 is in a high transparency state, the preset current value and / or the first preset time are reduced. At this time, the outdoor temperature is high, and the sunlight is usually strong. In this temperature range, indoor lighting adjustment is mainly aimed at cooling. When the outdoor light intensity does not increase much due to temporary cloud cover or other reasons, the outdoor temperature is still high. Therefore, reducing the preset value or duration of the current change allows the electrochromic glass panel 21 to quickly change to a lower transparency state, which helps to reduce the indoor temperature and improve indoor comfort.

[0040] In some examples, when the outdoor temperature is between a first preset temperature value and a second preset temperature value, the current preset value is the default current value, the first preset time is the default time, and the second preset temperature value is less than the first preset temperature value. When the outdoor temperature is between the first and second preset temperature values, it is a relatively comfortable temperature, and the current preset value and the first preset time do not need to be adjusted, simplifying the control logic.

[0041] In some examples, when the outdoor temperature is lower than the second preset temperature value and the electrochromic glass panel 21 is in a high transparency state, the preset current value and / or the preset time are increased. At this time, the outdoor temperature is low and the light is usually weak. In this temperature range, the indoor light adjustment is mainly for the purpose of keeping warm. When the outdoor light intensity occasionally increases due to cloud changes or other reasons, the outdoor temperature is still low. Therefore, increasing the preset value or duration of the current change allows the electrochromic glass panel 21 to maintain a high transparency state for a longer period of time, which is beneficial to increasing the indoor temperature and also reduces the color-changing frequency of the electrochromic glass panel 21.

[0042] In some examples, when the outdoor temperature is lower than a second preset temperature value and the electrochromic glass panel 21 is in a low transparency state, the preset current value and / or preset time are reduced. At this time, the outdoor temperature is low, and the light is usually weak. In this temperature range, indoor lighting adjustment is mainly for the purpose of keeping warm. When the outdoor light intensity occasionally increases due to cloud changes or other reasons, the outdoor temperature is still low. Therefore, reducing the preset value or duration of the current change allows the electrochromic glass panel 21 to quickly switch to a higher transparency state, which helps to increase the indoor temperature and improve indoor comfort.

[0043] In some examples, such as Figure 2 As shown in Figure 3, the outdoor temperature is measured by an outdoor temperature detector 40. The outdoor temperature detector 40 is separated from both the photovoltaic power generation module and the electrochromic glass module to avoid factors such as heat generated by the photovoltaic power generation module and the electrochromic glass module affecting the detection accuracy of the outdoor temperature detector 40. In other examples, the outdoor temperature is obtained from a remote server. The server can provide weather parameters; for example, the controller 30 can obtain outdoor temperature information from the remote server via a wireless network. This outdoor temperature information can be the average outdoor temperature within a reasonable area.

[0044] In some examples, the controller 30 is also used to determine the adjustment range of the preset current value and the first preset time based on the changing trends of the outdoor temperature and the current over a second preset time period. The adjustment range of the preset current value and the first preset time refers to the numerical increase or decrease of the preset current value and the first preset time.

[0045] In some examples, when the trends of outdoor temperature change and current change are highly similar, the adjustment range of the current preset value and the first preset time is a first amplitude value, which is a relatively large value. For example, within the second preset time, if the outdoor temperature generally increases over time and the current also generally increases over time, or if the outdoor temperature generally decreases over time and the current also generally decreases over time, it indicates a strong positive correlation between the increase in outdoor temperature and the increase in light intensity. In this case, adjusting the transparency of the electrochromic glass plate 21 according to the temperature will be more effective in regulating the indoor temperature, and therefore a larger adjustment range can be used.

[0046] In some examples, when the trends of outdoor temperature and current change are not very similar, the adjustment range of the current preset value and the first preset time is a second amplitude value, which is smaller than the first amplitude value. For example, within the second preset time, if the outdoor temperature generally increases over time while the current generally decreases or remains constant, or vice versa, it indicates that the outdoor temperature is not significantly correlated with light intensity. In this case, the effect of adjusting the transparency of the electrochromic glass plate 21 to regulate the indoor temperature is relatively weakened, so a smaller adjustment range can be used.

[0047] In some examples, the second preset time is longer than the first preset time, which allows for observation of the changing trends of outdoor temperature and current over a longer period of time, reducing the frequency of adjustment and simplifying control.

[0048] In some examples, the electrochromic glass panel 21 is divided into three states according to its transparency, ranging from transparent to opaque: a first state, a second state, and a third state. After the electrochromic glass module is started, the controller 30 determines whether the average current value of the first wire 13 falls within a first, second, or third interval where the current value gradually increases, based on the average current value of the first wire 13 over a third preset time period. The controller then applies a first, second, or third voltage to the first electrochromic glass panel 21 accordingly, so that the electrochromic glass panel 21 is in the first, second, or third state, thereby achieving multiple transparency levels corresponding to various light intensities. The third preset time period can be the photovoltaic current value before, during, or after the electrochromic glass module is started. The voltage values ​​of the first voltage, the second voltage, or the third voltage can be gradually increased or decreased, and the minimum value among the three can be 0. The voltage values ​​of the first voltage, the second voltage, or the third voltage are related to the specific material of the electrochromic glass plate 21 and the electrochromic principle. For example, for an electrochromic glass plate 21 that is transparent when energized and fogged when de-energized, the first voltage, the second voltage, or the third voltage can be gradually decreased; for an electrochromic glass plate 21 that is fogged when energized and transparent when de-energized, the first voltage, the second voltage, or the third voltage can be gradually increased.

[0049] In some examples, the third preset time is shorter than the first preset time, which helps the transparency state of the electrochromic glass panel 21 to better match the light intensity when the current electrochromic glass component is started, and also avoids the delay in the color change of the electrochromic glass panel 21.

[0050] In some examples, the voltage on the electrochromic glass panel 21 is supplied by the battery 11, realizing the rational utilization of photovoltaic energy. In other examples, the voltage on the electrochromic glass panel 21 is supplied by the power grid. In still other examples, the voltage on the electrochromic glass panel 21 is switched to be supplied by the power grid when the battery 11 is insufficient.

[0051] In some examples, the electrochromic glass component is controlled to turn off when the current drops to a preset minimum value, and to turn on when the current rises to the preset minimum value, thus realizing the on / off operation of the electrochromic glass component. When the current is below the preset minimum value, such as at night when the outdoor light intensity is low, the electrochromic glass component does not need to adjust the light, and the electrochromic glass component does not need to be powered, saving energy.

[0052] Finally, it should be emphasized that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smart photovoltaic curtain wall with color-changing function, characterized in that... The system includes a photovoltaic power generation module, an electrochromic glass module, and an electronic controller. The photovoltaic power generation module includes a battery, a semiconductor plate, a first wire, and a current detector. The semiconductor plate faces outdoors to receive solar radiation. The first wire connects the battery and the semiconductor plate. The current detector is used to detect the current in the first wire. The electrochromic glass module includes an electrochromic glass plate facing the same direction as the semiconductor plate. The electrochromic glass plate does not obstruct the semiconductor plate. The electrochromic glass plate can switch between different levels of transparency depending on the voltage applied to it. The electronic controller is used to control the voltage applied to the first electrochromic glass plate based on the current in the first wire detected by the current detector. When the change in current of the first wire exceeds the current preset value and continues to exceed the current preset value for a first preset time, the voltage applied to the electrochromic glass plate is controlled to change, thereby causing the transparency of the electrochromic glass plate to change. When the change in current of the first wire is within the preset current value, or when the change in current of the first wire exceeds the preset current value but does not last for a first preset time, the voltage applied to the electrochromic glass plate is kept constant.

2. The intelligent photovoltaic curtain wall with color-changing function according to claim 1, characterized in that... The electronic controller is also used to adjust the preset current value and the first preset time according to the outdoor temperature and the transparency of the electrochromic glass panel: When the outdoor temperature is greater than the first preset temperature value and the electrochromic glass plate is in a state of low transparency, the preset current value and / or the first preset time are increased. When the outdoor temperature is greater than the first preset temperature value and the electrochromic glass plate is in a state of high transparency, the preset current value and / or the first preset time are reduced.

3. A smart photovoltaic curtain wall with color-changing function according to claim 2, characterized in that... When the outdoor temperature is between the first preset temperature value and the second preset temperature value, the current preset value is the default current value, and the first preset time is the default time. The second preset temperature value is less than the first preset temperature value.

4. A smart photovoltaic curtain wall with color-changing function according to claim 3, characterized in that... When the outdoor temperature is lower than the second preset temperature value and the electrochromic glass plate is in a state of high transparency, increase the preset current value and / or increase the preset time. When the outdoor temperature is lower than the second preset temperature value and the electrochromic glass plate is in a state of low transparency, the preset current value and / or the preset time are reduced.

5. A smart photovoltaic curtain wall with color-changing function according to claim 2, characterized in that... The outdoor temperature is measured by an outdoor temperature detector that is separated from the photovoltaic power generation module and the electrochromic glass module; or, the outdoor temperature is obtained from a remote server.

6. A smart photovoltaic curtain wall with color-changing function according to claim 2, characterized in that... The electronic controller is also used to determine the adjustment range of the preset current value and the first preset time based on the changing trend of the outdoor temperature and the changing trend of the current within a second preset time period: When the trend of outdoor temperature change and the trend of current change are highly similar, the adjustment range of the current preset value and the first preset time is the first amplitude value; When the trend of outdoor temperature change and the trend of current change are not very similar, the adjustment range of the current preset value and the first preset time is the second amplitude value, which is smaller than the first amplitude value.

7. A smart photovoltaic curtain wall with color-changing function according to claim 6, characterized in that... The second preset time is greater than the first preset time.

8. A smart photovoltaic curtain wall with color-changing function according to any one of claims 1 to 7, characterized in that... The electrochromic glass plate is divided into three states according to its transparency, ranging from transparent to opaque: a first state, a second state, and a third state. After the electrochromic glass assembly is started, the electronic controller is used to determine, based on the average current value of the first wire over a third preset time period, whether the average current value is in a first interval, a second interval, or a third interval where the current value gradually increases, and accordingly apply a first voltage, a second voltage, or a third voltage to the first electrochromic glass plate so that the electrochromic glass plate is in a first state, a second state, or a third state.

9. A smart photovoltaic curtain wall with color-changing function according to claim 8, characterized in that... The third preset time is less than the first preset time.

10. A smart photovoltaic curtain wall with color-changing function according to any one of claims 1 to 7, characterized in that... The voltage applied to the electrochromic glass plate is provided by the battery or by the power grid.

Images