BIPV curtain system and control method thereof

Abstract

The invention provides a BIPV curtain system and a control method thereof, and relates to the technical field of photovoltaic power generation, the BIPV curtain system comprises a curtain body, a driving adjusting device, a power management module and a control module; the curtain body comprises shading strips and light-transmitting strips which are alternately arranged, and the shading strips are composed of flexible semitransparent photovoltaic cells; the drive adjusting device is arranged in the upper beam assembly and connected with the curtain body. The power management module is integrated in the upper beam assembly and is electrically connected with the flexible semitransparent photovoltaic cell; the control module is electrically connected with the drive adjusting device and the power management module. The environment data is obtained through the control module, the driving adjusting device is controlled to adjust the curtain body displacement according to the environment data, the power management module is controlled to adjust electric energy use and storage, and the indoor lighting comfort and the photovoltaic power generation efficiency are dynamically balanced.

Description

Technical Field

[0001] This application relates to the field of photovoltaic power generation technology, and in particular to a BIPV curtain system and its control method. Background Technology

[0002] Building Integrated Photovoltaics (BIPV) is a technology that integrates solar power generation products into buildings. BIPV directly integrates photovoltaic modules into building materials, such as glass curtain walls and roof tiles, making them both power generation devices and part of the building structure, combining functions such as power generation, light transmission, heat insulation, and waterproofing.

[0003] In related technologies, most photovoltaic curtains or photovoltaic window products use rigid silicon-based or single-layer thin-film photovoltaic materials, which often suffer from problems such as heavy weight, insufficient light transmission, and appearance that clashes with the interior environment, making it difficult to widely apply in residential and office buildings. Meanwhile, traditional photovoltaic windows are usually fixed components with non-adjustable light transmittance and shading rates, failing to meet the lighting comfort needs of users at different times and under different lighting conditions. While some new semi-transparent photovoltaic windows achieve a certain degree of compatibility between light transmission and power generation, they still have shortcomings in dynamically balancing indoor lighting comfort and photovoltaic power generation efficiency. Summary of the Invention

[0004] This application provides a BIPV curtain system and its control method for dynamically adjusting indoor light transmittance and photovoltaic power generation efficiency, and intelligently balancing indoor lighting comfort and photovoltaic power generation efficiency.

[0005] According to a first aspect of this application, a BIPV curtain system is provided, comprising: Curtain, drive adjustment device, power management module and control module; The curtain consists of alternating woven light-blocking and light-transmitting strips. The light-blocking strips are composed of flexible semi-transparent photovoltaic cells to absorb visible light and some near-infrared light to achieve photoelectric conversion. The drive adjustment device is located inside the upper beam assembly and connected to the curtain. The drive adjustment device responds to the control command of the control module to drive the curtain so as to dynamically adjust the indoor light transmittance and photovoltaic power generation efficiency by adjusting the degree of overlap or interlacing of the shading strips and the light transmittance strips. The power management module is integrated into the upper beam assembly and is electrically connected to the flexible semi-transparent photovoltaic cell. It is used to collect, convert, store and manage the electrical energy generated by the flexible semi-transparent photovoltaic cell. The control module is electrically connected to the drive adjustment device and the power management module respectively. It is used to acquire environmental parameters and, based on the environmental parameters, control the drive adjustment device to adjust the curtain displacement and control the power management module to adjust the use and storage of electrical energy, so as to dynamically balance the indoor lighting comfort and photovoltaic power generation efficiency.

[0006] Optionally, the band gap of the semi-transparent photovoltaic cell ranges from 1.40 eV to 2.5 eV; the transmittance of the semi-transparent photovoltaic cell can be adjusted from 10% to 70%.

[0007] Optionally, the semi-transparent photovoltaic cells can be arranged in a series-parallel combination structure; The photovoltaic cells in each shading strip are connected in series to form an intra-strip series unit. The intra-strip series units of multiple shading strips are connected in parallel to form a parallel branch. Each shading strip or every 2 to 3 photovoltaic cells is equipped with a bypass diode. Parallel branches are equipped with independent power conversion channels or time-division scanning power conversion units.

[0008] Optionally, the drive adjustment device includes a reel, a drive component, and a displacement detection component; The reel has a tubular structure and is covered with a low-friction adhesive layer to avoid damaging the semi-transparent photovoltaic cells during winding. The driving component is a DC tubular motor or a stepper motor, which is used to drive the roller to rotate so as to move the curtain body to adjust the degree of overlap or interlacing of the light-blocking strips and the light-transmitting strips; The displacement detection component is a Hall encoder, which works with the drive unit to monitor the relative displacement of the curtain in real time and feeds the displacement data back to the control module.

[0009] Optionally, the power management module includes a power conversion unit, an energy storage unit, and a safety protection unit; The power conversion unit is a step-up / step-down converter used to adapt to the voltage output of semi-transparent photovoltaic cells; The energy storage unit is a supercapacitor or a lithium iron phosphate battery pack, used to power the electrical components of the protection system; The safety protection unit includes a resettable fuse, surge protector, and reverse connection protection to prevent damage from overcurrent, lightning strikes, and reverse wiring.

[0010] Optionally, the control module is also connected to an environmental sensing submodule; The environmental sensing submodule includes an outdoor light sensor, an indoor light sensor, a temperature sensor, and a human body sensor.

[0011] Optionally, the environmental sensing submodule includes an outdoor light sensor, an indoor light sensor, a temperature sensor, and a human body sensor, including: The outdoor light sensor is a silicon photodetector or a miniature radiometer, used to collect outdoor light intensity. Indoor light sensors are used to collect indoor light intensity. Temperature sensors are used to collect indoor and outdoor ambient temperatures.

[0012] Optionally, the control module can also acquire environmental parameters uploaded by the environmental sensing submodule and determine the current operating priority mode based on the environmental parameters. The priority modes include energy-saving priority mode, production capacity priority mode, anti-glare mode, and comfortable lighting mode.

[0013] According to a second aspect of this application, a control method for a BIPV curtain system is provided, comprising: Acquire outdoor light intensity, indoor illuminance, and ambient temperature data, analyze the data based on preset comfort thresholds, and determine the current priority mode of the BIPV curtain system; According to the priority mode, the control drive adjustment device drives the front and rear layers of fabric of the curtain to produce relative displacement. By adjusting the overlap area of ​​the blackout strip and the light-transmitting strip, the overall light transmittance of the BIPV curtain system is dynamically controlled. Based on the wavelength distribution characteristics of outdoor sunlight, the power management module selectively activates semi-transparent photovoltaic cell sub-arrays with different bandgap ranges to optimize the synergistic matching of spectral absorption efficiency and light transmission effect. Based on the light transmittance adjustment results and the power generation status of the semi-transparent photovoltaic cells, the control strategy corresponding to the priority mode is executed to dynamically balance indoor lighting comfort and photovoltaic power generation efficiency.

[0014] Optionally, when an overcurrent, curtain jamming, or abnormal component overheating is detected during the curtain winding process, a safety mode is immediately triggered. The drive adjustment device is controlled to stop the motor and the curtain is retracted to a preset safe position via reverse drive. At the same time, the power management module is controlled to cut off unnecessary power supply circuits to prevent mechanical damage and electrical faults from escalating.

[0015] This application provides a BIPV curtain system and its control method. Through this application, the BIPV curtain system features a curtain body with alternating woven blackout and light-transmitting strips, and includes a drive adjustment device integrated within the upper beam assembly that responds to control commands to drive the curtain body to adjust the overlap and interlacing of the blackout and light-transmitting strips; a power management module integrated within the upper beam assembly that can collect, convert, store, and manage photovoltaic power output; and a control module that acquires environmental parameters and accordingly controls the drive adjustment device to adjust the curtain body displacement and controls the power management module to regulate power management. Therefore, it can solve related technical problems. Traditional curtains can only adjust the amount of light they pass through, lacking energy utilization capabilities. Photovoltaic curtains are mostly fixed and cannot flexibly adjust light transmittance and power generation efficiency. They also lack integrated power management and intelligent balance control based on environmental parameters, making it difficult to balance indoor lighting comfort and photovoltaic power generation efficiency. This results in insufficient energy utilization and low applicability. The solution aims to achieve dynamic adjustment of indoor light transmittance and photovoltaic power generation efficiency, intelligent balance between indoor lighting comfort and photovoltaic power generation efficiency, and effective management of photovoltaic power. It combines the functions of lighting, shading, power generation, and power management, thereby improving the building's energy utilization efficiency and the applicability of BIPV curtain systems.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of a BIPV curtain system provided in an embodiment of this application; Figure 2 This is a left view of a BIPV curtain system provided in an embodiment of this application; Figure 3 This is a right view of a BIPV curtain system provided in an embodiment of this application; Figure 4 A flowchart illustrating a control method for a BIPV curtain system provided in an embodiment of this application; Figure 5 This is a flowchart illustrating another control method for a BIPV curtain system provided in an embodiment of this application. Detailed Implementation

[0019] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0020] The following description, with reference to the accompanying drawings, illustrates an embodiment of a BIPV curtain system and its control method.

[0021] Figure 1 This is a front view of a BIPV curtain system provided in an embodiment of this application. Figure 2 This is a left view of a BIPV curtain system provided in an embodiment of this application. Figure 3 A right view of a BIPV curtain system provided in an embodiment of this application, as shown below. Figure 1 , Figure 2 , Figure 3 As shown, the BIPV curtain system includes: 1. Curtain body; 2. Drive adjustment device; 3. Power management module; and 4. Control module; The curtain 1 includes alternating woven light-blocking strips 5 and light-transmitting strips 6. The light-blocking strips 5 are composed of flexible semi-transparent photovoltaic cells to absorb visible light and some near-infrared light to achieve photoelectric conversion. The drive adjustment device 2 is installed inside the upper beam assembly 7 and connected to the curtain 1. The drive adjustment device 2 drives the curtain 1 in response to the control command of the control module 4 so as to dynamically adjust the indoor light transmittance and photovoltaic power generation efficiency by adjusting the degree of overlap or interlacing of the shading strip 5 and the light transmittance strip 6. The power management module 3 is integrated into the upper beam assembly 7 and is electrically connected to the flexible semi-transparent photovoltaic cell. It is used to collect, convert, store and manage the electrical energy generated by the flexible semi-transparent photovoltaic cell. The control module 4 is electrically connected to the drive adjustment device 2 and the power management module 3 respectively. It is used to acquire environmental parameters and, based on the environmental parameters, control the drive adjustment device 2 to adjust the displacement of the curtain 1 and control the power management module 3 to adjust the use and storage of electrical energy, so as to dynamically balance the indoor lighting comfort and photovoltaic power generation efficiency.

[0022] In this embodiment, the BIPV curtain system specifically includes several core components: curtain body 1, drive adjustment device 2, power management module 3, and control module 4. The curtain body 1 employs an alternating woven structure, composed of blackout strips 5 and light-transmitting strips 6. The blackout strips 5 are not traditional blackout fabrics but are made of flexible semi-transparent photovoltaic cells. These flexible semi-transparent photovoltaic cells have the ability to absorb visible light and some near-infrared light, converting the absorbed light energy into electrical energy, thus achieving photoelectric conversion and providing the energy foundation for the BIPV curtain system. The drive adjustment device 2 is not independently installed but is installed inside a dedicated upper beam assembly 7 and connected to the curtain body 1. When it receives a control command from the control module 4, the drive adjustment device 2 starts and drives the curtain body 1. Its core function is to flexibly adjust the indoor light transmittance by changing the overlap or staggered state between the blackout strips 5 and the light-transmitting strips 6. Simultaneously, due to the photovoltaic properties of the blackout strips 5, this adjustment also affects the photovoltaic power generation efficiency, achieving dynamic adjustment of both. The power management module 3 is also integrated into the upper beam assembly. Within component 7, and electrically connected to the flexible semi-transparent photovoltaic cells constituting the shading strip 5, it primarily undertakes the function of power management. Specifically, it collects the electrical energy generated by the flexible semi-transparent photovoltaic cells, converts the electrical energy into voltage or current forms that meet usage requirements, stores temporarily unused electrical energy for later use, and outputs the processed electrical energy to components that require power, ensuring the effective utilization of electrical energy. The control module 4 serves as the control core of the BIPV curtain system, and is electrically connected to the drive adjustment device 2 and the power management module 3. It can acquire environmental parameters such as outdoor light intensity, indoor illuminance, and ambient temperature in real time. Based on these acquired environmental parameters, it makes judgments and decisions. On the one hand, it sends instructions to the drive adjustment device 2 to control its adjustment of the displacement of the curtain 1. On the other hand, it sends instructions to the power management module 3 to adjust the priority of power use and storage strategy, ultimately achieving a dynamic balance between indoor lighting comfort and photovoltaic power generation efficiency.

[0023] This application solves the problem that traditional curtains can only adjust light but have no energy utilization function through the coordinated work of various components. It also overcomes the defect that the light transmittance and power generation efficiency of photovoltaic components in related technologies cannot be adjusted, and realizes the integration of lighting, power generation and power management, effectively improving the building's energy utilization efficiency and indoor living comfort.

[0024] In the embodiments of this application, the band gap of the semi-transparent photovoltaic cell ranges from 1.40 electron volts to 2.5 electron volts; the transmittance of the semi-transparent photovoltaic cell can be adjusted within the range of 10% to 70%.

[0025] In this embodiment, in the BIPV curtain system, the flexible semi-transparent photovoltaic cells constituting the light-blocking strips 5 of the curtain body 1 optionally possess specific bandgap ranges and transmittance adjustment characteristics. Specifically, the bandgap range of the semi-transparent photovoltaic cells is set to 1.40 eV to 2.5 eV. As a core parameter of photovoltaic materials, the bandgap directly determines their absorption capacity of the solar spectrum. This bandgap range can precisely cover visible light (wavelength 400-760nm corresponding to a bandgap of 1.63-3.10 eV) and part of the near-infrared light (wavelength 760-1100nm corresponding to a bandgap of 1.13-1.63 eV). This ensures that the curtain's light transmission function is not sacrificed due to excessive absorption of visible light caused by an excessively small bandgap, nor is the photoelectric conversion efficiency reduced due to an excessively large bandgap that only absorbs a small number of high-energy photons. This ensures that basic light transmission performance is maintained while achieving photoelectric conversion. Meanwhile, the transmittance of this semi-transparent photovoltaic cell can be adjusted within the range of 10% to 70%. This adjustability allows it to adapt to the needs of different scenarios. For example, at noon under strong direct sunlight, the transmittance can be lowered to 10%-30% to reduce indoor glare and solar radiation heat entry, while increasing the light density of the photovoltaic cell to improve power generation efficiency. On cloudy days or in office or residential scenarios that require sufficient natural light, the transmittance can be increased to 40%-70% to allow more natural light to enter the room, meeting lighting needs and reducing artificial lighting energy consumption. This solves the problems in related technologies where the fixed bandgap of photovoltaic cells makes it difficult to balance absorption spectrum and light transmission requirements, and the inability to adjust the transmittance to adapt to different lighting scenarios. It achieves a flexible match between photoelectric conversion efficiency and light transmission requirements, further enhancing the adaptability and practical value of the BIPV curtain system in different environments.

[0026] In this embodiment, the semi-transparent photovoltaic cell adopts a series-parallel combined structure; The photovoltaic cells in each shading strip are connected in series to form an intra-strip series unit. The intra-strip series units of multiple shading strips are connected in parallel to form a parallel branch. Each shading strip or every 2 to 3 photovoltaic cells is equipped with a bypass diode. Parallel branches are equipped with independent power conversion channels or time-division scanning power conversion units.

[0027] In this embodiment, the semi-transparent photovoltaic cells constituting the shading strips can adopt a series-parallel combination structure to optimize power output and stability. Specifically, within each shading strip, several photovoltaic cells are connected in series to form an intra-strip series unit. This series connection ensures that the photovoltaic devices within a single shading strip output a basic voltage that meets the requirements of subsequent power processing, avoiding the inability to meet the input voltage requirements of the power management module due to the low output voltage of a single photovoltaic cell. Subsequently, the corresponding intra-strip series units of multiple shading strips are connected in parallel to form parallel branches. The parallel design can, while maintaining the overall output voltage stability, superimpose the output current of each intra-strip series unit, thereby improving the overall power output of the semi-transparent photovoltaic cells and adapting to the power supply requirements of the BIPV curtain system. Meanwhile, to address the impact of localized shading on photovoltaic power generation, bypass diodes are configured for each shading strip or every 2 to 3 photovoltaic cells. When a shading strip or several photovoltaic cells experience a decrease in power generation efficiency or stop generating electricity due to localized shading, the corresponding bypass diodes will automatically conduct, allowing the current to bypass the failed or inefficient photovoltaic devices. This prevents them from becoming energy-consuming loads and generating hot spot effects (hot spot effects can cause excessively high local temperatures in photovoltaic devices, damaging the device structure and shortening its lifespan), thus ensuring the stable operation of the entire semi-transparent photovoltaic cell array. Furthermore, for the formed parallel branches, independent power conversion channels or time-division scanning power conversion units are configured. Independent power conversion channels can accurately convert power according to the actual power output characteristics of each parallel branch, avoiding the impact of power output differences between branches on the overall conversion efficiency. Time-division scanning power conversion units process the power of each parallel branch in a time-division manner, simplifying the hardware structure while ensuring conversion accuracy. Both configurations can efficiently adapt to the power output characteristics of parallel branches, ensuring that the power generated by the semi-transparent photovoltaic cells can be effectively converted into a usable form for the BIPV curtain system. This solves the problems of unstable power generation, easily damaged components, and low power utilization efficiency caused by unreasonable structural design of photovoltaic cell arrays (such as susceptibility to shading in simple series connection, hot spots due to lack of bypass protection, and lack of targeted power conversion) in related technologies. It effectively improves the power generation stability, service life, and power conversion efficiency of semi-transparent photovoltaic cells, providing a reliable guarantee for the energy supply of the BIPV curtain system.

[0028] In this embodiment, the drive adjustment device 2 includes a roller, a drive component, and a displacement detection component; The reel has a tubular structure and is covered with a low-friction adhesive layer to avoid damaging the semi-transparent photovoltaic cells during winding. The driving component is a DC tubular motor or a stepper motor, which is used to drive the roller to rotate so as to move the curtain body to adjust the degree of overlap or interlacing of the light-blocking strips and the light-transmitting strips; The displacement detection component is a Hall encoder, which works with the drive unit to monitor the relative displacement of the curtain in real time and feeds the displacement data back to the control module 4.

[0029] In this embodiment, the drive adjustment device 2 can be composed of a roller, a drive component, and a displacement detection component to achieve stable drive and precise displacement control of the curtain 1. The roller adopts a tubular structure, which provides support for the curtain winding while effectively fitting the internal installation space of the upper beam assembly 7. The outer surface of the roller is covered with a low-friction coating layer, which is often made of flexible, low-friction materials such as TPU or silicone. This significantly reduces friction between the roller and the light-shielding strip 5 of the curtain 1 during winding or unfolding, preventing scratches on the surface of the semi-transparent photovoltaic cells and damage to the internal structure caused by mechanical contact friction, thereby protecting the photoelectric conversion performance and lifespan of the photovoltaic cells. The drive component is specifically a DC tubular motor or a stepper motor. DC tubular motors are characterized by their small size, stable output torque, and low operating noise, making them suitable for smoothly driving the curtain to complete winding and unfolding actions in everyday scenarios. Stepper motors have high-precision speed control capabilities and can be adjusted according to actual needs. The requirement is to achieve fine displacement adjustment of the curtain. Both types of motors can drive the roller to rotate around its own axis through output torque. When the roller rotates, it synchronously pulls the curtain 1 to move, thereby changing the overlapping area or interlacing state of the light-blocking strip 5 and the light-transmitting strip 6, achieving dynamic adjustment of indoor light transmittance and photovoltaic power generation efficiency. The displacement detection component is a Hall encoder, which calculates the actual displacement of the curtain 1 by sensing the rotation angle of the output shaft of the drive component. It has the advantages of rapid response and high measurement accuracy. During the operation of the drive component, the Hall encoder will convert the monitored displacement data into electrical signals in real time and feed them back to the control module 4, so that the control module 4 can accurately grasp the current position of the curtain 1, avoid poor strip adjustment effect due to displacement control deviation, and ensure more precise balance control between indoor lighting comfort and photovoltaic power generation efficiency.

[0030] This configuration solves the problems of easy friction damage to photovoltaic cells, insufficient driving accuracy, and inability to monitor displacement status in real time in related technologies. It not only protects the integrity of the semi-transparent photovoltaic cells, but also realizes precise driving and displacement feedback of the curtain, improves the reliability and control accuracy of the drive adjustment device 2, and provides a guarantee for the stable operation of the BIPV curtain system.

[0031] In this embodiment, the power management module 3 includes a power conversion unit, an energy storage unit, and a safety protection unit; The power conversion unit is a step-up / step-down converter used to adapt to the voltage output of semi-transparent photovoltaic cells; The energy storage unit is a supercapacitor or a lithium iron phosphate battery pack, used to ensure power supply for electrical components of the BIPV curtain system; The safety protection unit includes a resettable fuse, surge protector, and reverse connection protection to prevent damage from overcurrent, lightning strikes, and reverse wiring.

[0032] In this embodiment, the power management module 3 of the BIPV curtain system specifically consists of a power conversion unit, an energy storage unit, and a safety protection unit. These units work together to achieve efficient management and safety protection of the power generated by the flexible semi-transparent photovoltaic cells. The power conversion unit employs a buck-boost converter. Since the output voltage of the semi-transparent photovoltaic cells fluctuates with environmental factors such as outdoor light intensity and temperature, the buck-boost converter can flexibly adjust the input and output voltages. It can boost the voltage when the photovoltaic cell output voltage is lower than the requirements of the BIPV curtain system, and buck the voltage when the output voltage is higher than the requirements, ensuring that the output voltage remains stable within the range suitable for the electrical components of the BIPV curtain system, avoiding the impact of voltage fluctuations on the normal operation of the components. The energy storage unit uses supercapacitors or lithium iron phosphate battery packs. Supercapacitors have the characteristics of fast charging and discharging speed and long cycle life, which can quickly store excess energy generated by the photovoltaic cells under short-term strong light, and can also quickly discharge in weak light or no light, providing instantaneous power support for the electrical components of the BIPV curtain system. Lithium iron phosphate batteries... The lithium battery pack boasts a higher energy storage capacity, suitable for long-term energy storage, ensuring a stable power supply for the BIPV curtain system in continuous low-light environments. Both can be flexibly selected according to actual usage scenarios, ensuring uninterrupted power supply to the electrical components of the BIPV curtain system. The safety protection unit includes a resettable fuse, surge protectors, and reverse connection protection components. The resettable fuse automatically melts in the event of an overcurrent, cutting off the circuit and preventing damage to components due to overcurrent. It automatically restores conduction after the fault is cleared, eliminating the need for frequent replacements. Surge protectors absorb instantaneous high voltage and large current generated by lightning strikes or grid fluctuations, preventing surge damage to circuit components. Reverse connection protection components prevent short circuits or component burnout caused by reversed polarity during wiring, comprehensively protecting the power management module and the entire BIPV curtain system's circuit safety. This achieves stable conversion, reliable storage, and safety protection of photovoltaic energy, ensuring a continuous and stable power supply for the BIPV curtain system while reducing the risk of circuit failures, thus improving the overall reliability and practicality of the BIPV curtain system.

[0033] In this embodiment of the application, the control module 4 is also connected to an environmental sensing submodule; The environmental sensing submodule includes an outdoor light sensor, an indoor light sensor, a temperature sensor, and a human body sensor.

[0034] In this embodiment, the control module 4 is also connected to an additional environmental sensing submodule. This environmental sensing submodule is the core component for the control module 4 to acquire information about the external and indoor environments. Specifically, it includes four types of functional sensors: outdoor light sensor, indoor light sensor, temperature sensor, and human body sensor. The outdoor light sensor is mainly used to collect real-time solar irradiance data of the outdoor environment. For example, it can accurately detect light intensity data under different lighting scenarios, such as strong sunlight at noon on a sunny day, weak sunlight on a cloudy day, or oblique sunlight in the morning or evening. This provides a basis for the control module 4 to judge the outdoor light energy resources and determine the potential for photovoltaic power generation. The indoor light sensor focuses on the actual light intensity of the indoor environment. It can capture the changes in illuminance in different areas of the room in real time, avoiding the problem of excessive indoor lighting causing glare or insufficient indoor lighting affecting visual comfort due to adjusting the curtains solely based on outdoor light data. The temperature sensor can simultaneously collect indoor and outdoor ambient temperatures. For example, when the outdoor temperature is too high in summer, it can help judge the degree of impact of solar radiation heat on the room. When the outdoor temperature is low in winter, it can also provide data support for using natural light to increase the indoor temperature. The human body sensor can detect whether there is human activity indoors. If it detects that no one has stayed indoors for a long time, it can report this information to the control module 4 so that the control module 4 can adjust the curtain state to a mode that is more conducive to photovoltaic power generation and reduce unnecessary light consumption. The various environmental parameters collected by these sensors are transmitted to the control module 4 in real time, providing comprehensive and accurate decision-making data support for the control module 4 to subsequently and precisely control the drive adjustment device 2 to adjust the curtain displacement and control the power management module 3 to regulate power use and storage. This solves the problem in related technologies where the lack of multi-dimensional environmental data acquisition capabilities in BIPV curtain systems makes it difficult for the control module to accurately judge environmental needs and adjust strategies without specificity. It allows the BIPV curtain system to perceive environmental changes more comprehensively and make control decisions more in line with actual usage needs, further improving the intelligence and adaptability of the BIPV curtain system.

[0035] In this embodiment, the environmental sensing submodule includes an outdoor light sensor, an indoor light sensor, a temperature sensor, and a human body sensor, comprising: The outdoor light sensor is a silicon photodetector or a miniature radiometer, used to collect outdoor light intensity. Indoor light sensors are used to collect indoor light intensity. Temperature sensors are used to collect indoor and outdoor ambient temperatures.

[0036] In this embodiment, the environmental sensing submodule includes an outdoor light sensor, an indoor light sensor, and a temperature sensor, each with specific data acquisition functions to adapt to the needs of the BIPV curtain system. Specifically, the outdoor light sensor employs a silicon photodetector or a miniature radiometer. The silicon photodetector, with its high sensitivity to visible light and some near-infrared light, can quickly respond to changes in outdoor light intensity, and its spectral response range matches the absorption spectrum of the semi-transparent photovoltaic cell, accurately reflecting the available light energy of the photovoltaic cell. The miniature radiometer directly measures the solar irradiance per unit area, providing more intuitive quantitative data for the control module to determine the photovoltaic power generation potential. Both sensors can stably collect outdoor light intensity, serving as an important basis for subsequent curtain adjustments. The indoor light sensor is primarily responsible for collecting the actual indoor light intensity, capturing in real time the differences in illuminance caused by factors such as curtain obstruction and changes in outdoor light intensity in different indoor areas. This avoids relying solely on outdoor light data to adjust the curtain, which could lead to excessively strong indoor lighting causing glare, or insufficient lighting affecting daily activities. Temperature sensors focus on collecting indoor and outdoor ambient temperatures. They can monitor outdoor temperature changes in real time, helping to determine the impact of solar radiation on indoor comfort in different seasons. They can also track indoor temperature fluctuations, providing data support for the control module to balance shading and heat insulation with lighting needs, and reduce energy consumption of temperature control equipment such as air conditioners. The environmental data collected by the three types of sensors is transmitted to the control module in real time, ensuring that the control module's decisions are more aligned with actual usage scenarios. This solves the problem in related technologies where environmental sensor modules collect only a single type of data and lack sufficient accuracy, making it difficult to accurately match the lighting and temperature data requirements of BIPV curtain systems. This allows BIPV curtain systems to perceive environmental changes more comprehensively and accurately, providing a reliable data foundation for curtain adjustment and power management, and further improving the rationality and practicality of BIPV curtain system control.

[0037] In this embodiment, the control module 4 also acquires environmental parameters uploaded by the environmental sensing submodule and determines the current operating priority mode based on the environmental parameters. The priority modes include energy-saving priority mode, production capacity priority mode, anti-glare mode, and comfortable lighting mode.

[0038] In this embodiment, the control module 4 acquires various environmental parameters uploaded by the environmental sensing submodule in real time. These parameters specifically include outdoor light intensity collected by the outdoor light sensor, indoor light intensity collected by the indoor light sensor, indoor and outdoor ambient temperature collected by the temperature sensor, and indoor occupant activity data collected by the human body sensor. The control module 4 comprehensively analyzes and judges these parameters to determine the priority mode that the BIPV curtain system should currently operate in. The priority modes include energy-saving priority mode, production capacity priority mode, anti-glare mode, and comfortable lighting mode. When the control module 4 detects that the outdoor temperature is high and the indoor solar radiation heat input needs to be reduced to lower the air conditioning load, it will determine to enter the energy-saving priority mode. At this time, it will control the drive adjustment device 2 to adjust the curtain 1, increasing the overlap between the shading strips 5 and the light-transmitting strips 6 to reduce solar radiation entering the room. At the same time, it will control the power management module 3 to prioritize power supply to the electrical components of the BIPV curtain system itself, reducing dependence on external power. When it detects that the outdoor light intensity is high and the temperature of the semi-transparent photovoltaic cells is within the suitable power generation range, it will determine to enter the power generation priority mode, further increasing the overlap area of ​​the shading strips 5 through the drive adjustment device 2. The system enhances the light density of photovoltaic cells while optimizing power conversion and storage strategies, prioritizing energy storage or output. When excessive indoor illuminance or direct sunlight posing a glare risk is detected, the system enters anti-glare mode, adjusting the curtain 1 to a suitable overlap of the shading strips 5 to reduce direct light and suppress glare. Conversely, when insufficient indoor illuminance or human presence is detected by the human body sensor, the system enters comfortable lighting mode, reducing the overlap of the shading strips 5 and increasing the light-transmitting area of ​​the light-transmitting strips 6 to ensure sufficient and comfortable natural lighting while maintaining basic photovoltaic power generation. By implementing priority operating modes based on environmental parameters and executing corresponding control strategies, the system adapts to different scenarios' energy-saving, power generation, anti-glare, and comfortable lighting needs, allowing the BIPV curtain system to dynamically switch operating modes according to the actual environment, further enhancing its intelligence and scenario adaptability.

[0039] Accordingly, embodiments of this application provide a control method for a BIPV curtain system, such as... Figure 4 As shown, the method includes: Step 401: Obtain outdoor light intensity, indoor illuminance and ambient temperature data, analyze the data based on preset comfort thresholds, and determine the current priority mode of the BIPV curtain system.

[0040] In some embodiments, outdoor light intensity data is first collected using an outdoor light sensor configured in the BIPV curtain system, indoor illuminance data is obtained using an indoor light sensor, and ambient temperature data is collected using a temperature sensor. Then, a preset comfort threshold is invoked from the BIPV curtain system. This threshold can be set based on common building indoor comfort standards, such as an indoor illuminance comfort threshold of 300-500 lx, an ambient temperature comfort threshold of 22-26℃, and outdoor light intensity corresponding to different scenario thresholds (e.g., strong light > 800 W / m², medium light 300-800 W / m²). Next, the collected outdoor light intensity, indoor illuminance, and ambient temperature data are compared with the preset comfort thresholds: if the indoor illuminance > 500 lx, ambient temperature > 26℃, and outdoor light intensity > 800 W / m², it is determined that the comfort thresholds are exceeded, and the priority mode is set to anti-glare mode; if the indoor illuminance is 300-500 lx and the ambient temperature is 22-26℃, it meets the comfort thresholds, and the mode is set to comfortable lighting mode. By combining key environmental data with preset comfort thresholds, the priority mode is determined to better match actual comfort needs, avoiding blind adjustments and improving the accuracy of BIPV curtain system control.

[0041] Step 402: According to the priority mode, the control drive adjustment device drives the front and rear layers of fabric of the curtain to produce relative displacement. By adjusting the overlap area of ​​the blackout strip and the light-transmitting strip, the overall light transmittance of the BIPV curtain system is dynamically controlled.

[0042] In some embodiments, based on a previously determined priority mode (such as anti-glare mode, comfortable lighting mode, energy-saving priority mode, etc.), the BIPV curtain system sends control commands to a drive adjustment device integrated in the upper beam assembly. This drive adjustment device includes a tubular roller and a DC tubular motor or stepper motor. After the motor starts, it drives the roller to rotate, thereby causing relative displacement between the front and rear layers of fabric in the curtain. For example, in anti-glare mode, the relative displacement between the two layers of fabric is increased, significantly increasing the overlap area between the blackout strips and the light-transmitting strips, reducing the overall light transmittance of the BIPV curtain system to weaken strong light; in comfortable lighting mode, the relative displacement between the two layers of fabric is reduced, decreasing the overlap area and increasing the light transmittance to ensure sufficient natural light; in energy-saving priority mode, the overlap area is adjusted as needed to balance shading and heat insulation with basic lighting. Through this dynamic adjustment of the overlap area, precise adaptation of the overall light transmittance of the BIPV curtain system is achieved. By adjusting the overlap area of ​​the shading strips and the light-transmitting strips, the light transmittance is adjusted to closely match the requirements of the priority mode, avoiding uncomfortable lighting, while also taking into account the photovoltaic utilization of the shading strips, thereby improving the practicality and indoor comfort of the BIPV curtain system.

[0043] Step 403: Based on the wavelength distribution characteristics of outdoor sunlight, the power management module is controlled to selectively activate semi-transparent photovoltaic cell sub-arrays with different bandgap ranges to optimize the synergistic matching of spectral absorption efficiency and light transmission effect.

[0044] In some embodiments, the BIPV curtain system first captures the wavelength distribution characteristics of outdoor light using a matching light wavelength detection component. For example, in midday light, the proportion of visible and near-infrared light in the 550-900nm range is high, while in early morning or evening light, the proportion of long-wavelength red light is higher. Then, a control signal is sent to the power management module integrated within the upper beam assembly. Since the bandgap range of the semi-transparent photovoltaic cell subarray covers 1.4-2.5eV, different bandgap values ​​absorb different wavelengths of light. The power management module selectively activates the corresponding bandgap subarray accordingly: if the proportion of near-infrared light is high, the subarray with a bandgap of 1.4-1.7eV is activated to efficiently absorb light energy in that band; if the proportion of visible light is high, the subarray with a bandgap of 1.8-2.5eV is activated, absorbing light energy while retaining more visible light for indoor lighting, thereby optimizing the synergistic matching of spectral absorption efficiency and light transmission effect. By selectively activating semi-transparent photovoltaic cell sub-arrays with different bandgap ranges through the control power management module, the synergistic matching of spectral absorption efficiency and light transmission effect is optimized to achieve precise adaptation of light energy absorption and light transmission requirements, avoid light energy waste, ensure indoor lighting, and improve the energy utilization efficiency and practicality of BIPV curtain system.

[0045] Step 404: Based on the light transmittance adjustment results and the power generation status of the semi-transparent photovoltaic cells, execute the control strategy corresponding to the priority mode to dynamically balance indoor lighting comfort and photovoltaic power generation efficiency.

[0046] In some embodiments, the BIPV curtain system first obtains the light transmittance adjustment result from step 402, and simultaneously monitors the power generation status of the semi-transparent photovoltaic cells through the power management module, including parameters such as instantaneous output power and voltage. Then, it executes the corresponding control strategy based on the determined priority mode. For example, in the comfortable lighting mode, if the indoor illuminance after light transmittance adjustment meets the preset comfort threshold (e.g., 300-500 lx) and the power generation status is stable, the current curtain position and power management method are maintained. If the illuminance is slightly low, the fine-tuning drive adjustment device reduces the overlapping area of ​​the shading strips to increase light transmittance, while ensuring that the power generation does not decrease significantly. In the capacity-priority mode, if the power generation status shows that the power does not meet expectations, without lowering the indoor illuminance below the comfort lower limit, the drive adjustment device is controlled to increase the overlapping area of ​​the shading strips to improve photovoltaic light reception. Simultaneously, the power management module optimizes energy storage, dynamically balancing indoor lighting comfort and photovoltaic power generation efficiency. This achieves dynamic control based on actual adjustment results and power generation status, avoiding imbalance problems caused by a single strategy and improving the overall adaptability and efficiency of the BIPV curtain system.

[0047] This application provides another control method for a BIPV curtain system, such as... Figure 5 As shown, the method includes: Step 501: Obtain outdoor light intensity, indoor illuminance and ambient temperature data, analyze the data based on preset comfort thresholds, and determine the current priority mode of the BIPV curtain system.

[0048] Step 502: According to the priority mode, the control drive adjustment device drives the front and rear layers of fabric of the curtain to generate relative displacement. By adjusting the overlap area of ​​the blackout strip and the light-transmitting strip, the overall light transmittance of the BIPV curtain system is dynamically controlled.

[0049] Step 503: Based on the wavelength distribution characteristics of outdoor sunlight, the power management module is controlled to selectively activate semi-transparent photovoltaic cell sub-arrays with different bandgap ranges to optimize the synergistic matching of spectral absorption efficiency and light transmission effect.

[0050] Step 504: Based on the light transmittance adjustment results and the power generation status of the semi-transparent photovoltaic cells, execute the control strategy corresponding to the priority mode to dynamically balance indoor lighting comfort and photovoltaic power generation efficiency.

[0051] For a description of steps 501-504, please refer to the description of steps 401-404 in the above embodiment. This embodiment will not repeat the details further.

[0052] Step 505: When an overcurrent, curtain jamming, or component overheating is detected during the curtain winding process, the safety mode is immediately triggered. The drive adjustment device is controlled to stop the motor and the curtain is pulled back to the preset safe position through reverse drive. At the same time, the power management module is controlled to cut off unnecessary power supply circuits to prevent mechanical damage and electrical faults from escalating.

[0053] In some embodiments, the BIPV curtain system monitors the operation of the curtain winding process in real time. When it detects overcurrent (e.g., an overcurrent signal from the safety protection unit of the power management module), curtain jamming (e.g., the displacement detection component of the drive adjustment device detects abnormal stagnation of the curtain displacement), or component overheating (e.g., a temperature sensor reports that the temperature of components such as the motor and photovoltaic cells exceeds a safety threshold), it immediately triggers a safety mode. The BIPV curtain system first sends a command to the drive adjustment device to stop the motor from running to prevent the fault from worsening. Then, it reverses the drive motor to pull the curtain back to a preset safe position (e.g., a half-open state to avoid jamming risk). Simultaneously, it sends a signal to the power management module to cut off unnecessary power supply circuits (e.g., external outputs, non-safety control auxiliary circuits), retaining power only for safety control and monitoring circuits to prevent the expansion of mechanical damage (motor stalling, curtain breakage) and electrical faults (overcurrent burning circuits, overheating damaging components). This step enables rapid response to anomalies and the implementation of protective measures, effectively preventing the fault from escalating and ensuring the mechanical and electrical safety of the BIPV curtain system.

[0054] Based on the above-mentioned related information, Figure 4 , Figure 5 The embodiment illustrates a control method for a BIPV curtain system. Correspondingly, this embodiment also provides a computer program product storing a computer program, which, when executed by a processor, implements the aforementioned related functions. Figure 4 , Figure 5 This illustrates a control method for a BIPV curtain system.

[0055] Based on this understanding, the technical solution of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as CD-ROM, USB flash drive, mobile hard drive, etc.) and includes several instructions to cause a computer device (such as personal computer, server, or network device, etc.) to execute the methods of various implementation scenarios of this application.

[0056] Based on the above-mentioned related information, Figure 4 , Figure 5 The present invention discloses a control method for a BIPV curtain system. To achieve the above objectives, embodiments of this application also provide an electronic device, such as a personal computer or server. This device includes a storage medium and a processor; the storage medium stores a computer program; the processor executes the computer program to implement the aforementioned related functions. Figure 4 , Figure 5 This illustrates a control method for a BIPV curtain system.

[0057] In some embodiments, the aforementioned physical device may further include a user interface, a network interface, a camera, radio frequency (RF) circuitry, sensors, audio circuitry, a Wi-Fi module, etc. The user interface may include a display screen, an input unit such as a keyboard, etc., and optionally, a USB interface, a card reader interface, etc. In some embodiments, the network interface may include a standard wired interface, a wireless interface (such as a Wi-Fi interface), etc.

[0058] Those skilled in the art will understand that the physical device structure provided in this embodiment does not constitute a limitation on the physical device, and may include more or fewer components, or combine certain components, or have different component arrangements.

[0059] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the aforementioned physical device, supporting the operation of information processing programs and other software and / or programs. The network communication module is used to enable communication between the various components within the storage medium, as well as communication with other hardware and software in the information processing physical device.

[0060] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platform, or it can be implemented by hardware.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0062] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to these embodiments, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A BIPV curtain system, characterized in that, include: Curtain, drive adjustment device, power management module and control module; The curtain includes alternating light-blocking strips and light-transmitting strips. The light-blocking strips are composed of flexible semi-transparent photovoltaic cells to absorb visible light and some near-infrared light to achieve photoelectric conversion. The drive adjustment device is located inside the upper beam assembly and connected to the curtain. The drive adjustment device drives the curtain in response to the control command of the control module, so as to dynamically adjust the indoor light transmittance and photovoltaic power generation efficiency by adjusting the degree of overlap or interlacing of the light-blocking strips and the light-transmitting strips. The power management module is integrated into the upper beam assembly and is electrically connected to the flexible semi-transparent photovoltaic cell. It is used to collect, convert, store and manage the electrical energy generated by the flexible semi-transparent photovoltaic cell. The control module is electrically connected to the drive adjustment device and the power management module respectively, and is used to acquire environmental parameters. Based on the environmental parameters, the control module controls the drive adjustment device to adjust the curtain displacement and controls the power management module to adjust the use and storage of electrical energy, so as to dynamically balance indoor lighting comfort and photovoltaic power generation efficiency.

2. The BIPV curtain system according to claim 1, characterized in that, The band gap of the semi-transparent photovoltaic cell ranges from 1.40 electron volts to 2.5 electron volts; the transmittance of the semi-transparent photovoltaic cell can be adjusted within the range of 10% to 70%.

3. The BIPV curtain system according to claim 2, characterized in that, The semi-transparent photovoltaic cell adopts a series-parallel combined structure; The photovoltaic cells in each shading strip are connected in series to form an intra-strip series unit, and the intra-strip series units of multiple shading strips are connected in parallel to form a parallel branch. A bypass diode is configured for each shading strip or for every 2 to 3 photovoltaic cells. The parallel branch is configured with an independent power conversion channel or a time-division scanning power conversion unit.

4. The BIPV curtain system according to claim 1, characterized in that, The drive adjustment device includes a roller, a drive component, and a displacement detection component; The reel has a tubular structure and is covered with a low-friction adhesive layer to avoid damaging the semi-transparent photovoltaic cells during winding. The driving component is a DC tubular motor or a stepper motor, used to drive the roller to rotate so as to move the curtain body to adjust the degree of overlap or interlacing of the light-blocking strips and the light-transmitting strips; The displacement detection component is a Hall encoder, which works in conjunction with the drive component to monitor the relative displacement of the curtain in real time and feeds the displacement data back to the control module.

5. The BIPV curtain system according to claim 1, characterized in that, The power management module includes a power conversion unit, an energy storage unit, and a safety protection unit. The power conversion unit is a step-up / step-down converter used to adapt to the voltage output of semi-transparent photovoltaic cells; The energy storage unit is a supercapacitor or a lithium iron phosphate battery pack, used to ensure the power supply of the electrical components of the BIPV curtain system. The safety protection unit includes a resettable fuse, a surge protector, and a reverse connection protector to prevent damage from overcurrent, lightning strikes, and reverse wiring.

6. The BIPV curtain system according to claim 1, characterized in that, The control module is also connected to an environmental sensing submodule; The environmental sensing submodule includes an outdoor light sensor, an indoor light sensor, a temperature sensor, and a human body sensor.

7. The BIPV curtain system according to claim 6, characterized in that, The environmental sensing submodule includes an outdoor light sensor, an indoor light sensor, a temperature sensor, and a human body sensor, including: The outdoor light sensor is a silicon photodetector or a miniature radiometer, used to collect outdoor light intensity. The indoor light sensor is used to collect indoor light intensity; The temperature sensor is used to collect indoor and outdoor ambient temperatures.

8. The BIPV curtain system according to claim 7, characterized in that, The control module also acquires environmental parameters uploaded by the environmental sensing submodule and determines the current operating priority mode based on the environmental parameters. The priority modes include energy-saving priority mode, production capacity priority mode, anti-glare mode, and comfortable lighting mode.

9. A control method for a BIPV curtain system, characterized in that, The method is applied to the BIPV curtain system as described in any one of claims 1-8, comprising: Acquire outdoor light intensity, indoor illuminance, and ambient temperature data; analyze the data based on a preset comfort threshold; and determine the current priority mode of the BIPV curtain system. According to the priority mode, the drive adjustment device is controlled to drive the front and rear layers of fabric of the curtain to produce relative displacement. By adjusting the overlap area of ​​the blackout strip and the light-transmitting strip, the overall light transmittance of the BIPV curtain system is dynamically controlled. Based on the wavelength distribution characteristics of outdoor sunlight, the power management module is controlled to selectively activate semi-transparent photovoltaic cell sub-arrays with different bandgap ranges, thereby optimizing the synergistic matching of spectral absorption efficiency and light transmission effect. Based on the light transmittance adjustment results and the power generation status of the semi-transparent photovoltaic cells, a control strategy corresponding to the priority mode is executed to dynamically balance indoor lighting comfort and photovoltaic power generation efficiency.

10. The control method for the BIPV curtain system according to claim 9, characterized in that, Also includes: When an overcurrent, curtain jamming, or component overheating is detected during the curtain winding process, a safety mode is immediately triggered. The drive adjustment device is controlled to stop the motor and the curtain is retracted to a preset safe position via reverse drive. At the same time, the power management module is controlled to cut off unnecessary power supply circuits to prevent mechanical damage and electrical faults from escalating.

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