基于驻极体发电机与能量管理电路的自供电液晶智能窗
Self-Powered Liquid Crystal Smart Window Based on an Electret Nanogenerator and Energy Management Circuit
摘要: 针对微纳发电机驱动液晶智能窗时存在阻抗不匹配、能量传输效率低以及大面积负载驱动困难等问题，本文基于阻抗匹配原理，提出了一种由动态拓扑重构能量管理电路驱动的高面积比自供电液晶智能窗系统。该系统以驻极体发电机(Electret nanogenerator, ENG)为能量输入单元，以扭曲向列相(Twisted nematic, TN)液晶智能窗为调光负载，并通过由电容–二极管单开关组成的管理电路实现子电容单元连接状态的动态重构，从而匹配发电端与液晶窗负载之间的阻抗关系。实验结果表明，在1 Hz机械激励下，ENG的输出峰值功率达到357.98 μW；经由包含35个子电容单元的能量管理电路调制后，系统转移电荷量提高至4.51 μC。基于该阻抗匹配策略，仅采用有效面积为25 cm2的ENG，即可在4 s内驱动面积为1116 cm2的TN型液晶智能窗，驱动面积比达到1:45。同时，智能窗表现出良好的电光调制性能，其对比度为669:1，可见光调制率为40.09%，响应时间达到毫秒级，并在长期循环测试中保持稳定工作。本研究有效突破了自供电智能窗的面积限制，为零能耗绿色建筑的动态采光控制与隐私保护提供了可靠的工程方案。
Abstract: To address the impedance mismatch, low energy transfer efficiency, and difficulty in driving large-area loads encountered when micro/nano generators are used to power liquid crystal smart windows, this study proposes a high-area-ratio self-powered liquid crystal smart window system driven by a dynamically reconfigurable energy management circuit based on impedance matching. The system employs an electret nanogenerator (ENG) as the energy input unit and a twisted nematic (TN) liquid crystal smart window as the optical modulation load. A capacitor-diode-single-switch management circuit is introduced to dynamically reconfigure the connection states of the sub-capacitor units, thereby matching the impedance between the power generation unit and the liquid crystal window load. Experimental results show that, under 1 Hz mechanical excitation, the ENG achieves a peak output power of 357.98 μW. After modulation by the energy management circuit containing 35 sub-capacitor units, the transferred charge of the system increases to 4.51 μC. Based on this impedance matching strategy, an ENG with an effective area of only 25 cm2 can drive a TN liquid crystal smart window with an area of 1116 cm2 within 4 s, corresponding to a driving area ratio of 1:45. In addition, the smart window exhibits favorable electro-optical modulation performance, with a contrast ratio of 669:1, a visible-light modulation of 40.09%, a millisecond-level response time, and stable operation during long-term cycling tests. This study effectively overcomes the area limitation of self-powered smart windows and provides a viable engineering approach for dynamic daylight control and privacy protection in zero-energy green buildings.
文章引用：张烨. 基于驻极体发电机与能量管理电路的自供电液晶智能窗[J]. 电力与能源进展, 2026, 14(3): 190-203. https://doi.org/10.12677/aepe.2026.143020

参考文献

[1] Zhang, Z., Zhang, L., Zhou, Y., Cui, Y., Chen, Z., Liu, Y., et al. (2023) Thermochromic Energy Efficient Windows: Fundamentals, Recent Advances, and Perspectives. Chemical Reviews, 123, 7025-7080. [Google Scholar] [CrossRef] [PubMed]
[2] Souviron, J., van Moeseke, G. and Khan, A.Z. (2019) Analysing the Environmental Impact of Windows: A Review. Building and Environment, 161, 106268. [Google Scholar] [CrossRef] 
[3] Wang, X., Li, M., Wang, D., Zhang, H., Duan, R., Zhang, D., et al. (2020) Low-Cost, Robust Pressure-Responsive Smart Windows with Dynamic Switchable Transmittance. ACS Applied Materials & Interfaces, 12, 15695-15702. [Google Scholar] [CrossRef] [PubMed]
[4] Liu, Y., Wang, J., Wang, F., Cheng, Z., Fang, Y., Chang, Q., et al. (2021) Full-Frame and High-Contrast Smart Windows from Halide-Exchanged Perovskites. Nature Communications, 12, Article No. 3360. [Google Scholar] [CrossRef] [PubMed]
[5] Kim, C.W., Santoro, E.G., Pawar, A.U., Lee, D.K., Peña‐Rodriguez, O., Pal, U., et al. (2023) Swift Photochromic Smart Window Based on Plasmonic Yolk‐Shell Nanophosphors. Advanced Optical Materials, 11, Article 2202171. [Google Scholar] [CrossRef] 
[6] Li, J., Gu, P., Pan, H., Qiao, Z., Wang, J., Cao, Y., et al. (2023) A Facile Yet Versatile Strategy to Construct Liquid Hybrid Energy‐Saving Windows for Strong Solar Modulation. Advanced Science, 10, Article 2206044. [Google Scholar] [CrossRef] [PubMed]
[7] Wu, S., Cossio, G., Braun, B., Wu, F.C.M. and Yu, E.T. (2023) Smart Window Structures Based on Highly Conductive, Transparent Metal Nanomeshes and Thermochromic Perovskite Films. Advanced Optical Materials, 11, Article 2202409. [Google Scholar] [CrossRef] 
[8] Gao, G.H., Xue, S., Wang, H., Zhang, Z., Shen, J. and Wu, G. (2023) Medium-Scale Production of Gasochromic Windows by Sol-Gel. Journal of Sol-Gel Science and Technology, 106, 331-340. [Google Scholar] [CrossRef] 
[9] Kandpal, S., Ghosh, T., Rani, C., Bansal, L., Tanwar, M. and Kumar, R. (2023) Tungsten-Oxide/Polypyrrole Film for Hybrid Solid-State Electrochromic Smart Window. Journal of Applied Physics, 133, Article 023101. [Google Scholar] [CrossRef] 
[10] Zhang, H., Feng, J., Sun, F., Zhou, D., Cao, G., Wang, S., et al. (2023) Self‐Driven Ni‐Based Electrochromic Devices for Energy‐Efficient Smart Windows. Advanced Materials Technologies, 8, Article 2201688. [Google Scholar] [CrossRef] 
[11] Kim, H.N. and Yang, S. (2019) Responsive Smart Windows from Nanoparticle-Polymer Composites. Advanced Functional Materials, 30, Article 1902597. [Google Scholar] [CrossRef] 
[12] Zhou, L., Liu, D., Liu, L., He, L., Cao, X., Wang, J., et al. (2021) Recent Advances in Self-Powered Electrochemical Systems. Research, 2021, Article ID: 4673028. [Google Scholar] [CrossRef] [PubMed]
[13] Vidal, J.V., Rolo, P., Carneiro, P.M.R., Peres, I., Kholkin, A.L. and Soares dos Santos, M.P. (2022) Automated Electromagnetic Generator with Self-Adaptive Structure by Coil Switching. Applied Energy, 325, Article 119802. [Google Scholar] [CrossRef] 
[14] Fu, X., Pan, X., Liu, Y., Li, J., Zhang, Z., Liu, H., et al. (2023) Non‐Contact Triboelectric Nanogenerator. Advanced Functional Materials, 33, Article 2306749. [Google Scholar] [CrossRef] 
[15] Gao, X., Huang, M., Zou, G., Li, X. and Wang, Y. (2023) Self-Powered Vibration Sensor Based on the Coupling of Dual-Mode Triboelectric Nanogenerator and Non-Contact Electromagnetic Generator. Nano Energy, 111, Article 108356. [Google Scholar] [CrossRef] 
[16] Xu, Z., Tan, J., Chen, H., Di, K., Bao, K., Cheng, J., et al. (2023) Fatigue-Resistant High-Performance Dielectric Elastomer Generator in Alternating Current Method. Nano Energy, 109, Article 108314. [Google Scholar] [CrossRef] 
[17] Huang, J., Ren, Z., Zhang, Y., Fong, P.W., Chandran, H.T., Liang, Q., et al. (2022) Tandem Self‐Powered Flexible Electrochromic Energy Supplier for Sustainable All‐Day Operations. Advanced Energy Materials, 12, Article 2201042. [Google Scholar] [CrossRef] 
[18] Wang, J., Meng, C., Wang, C., Liu, C., Chang, Y., Li, C., et al. (2021) A Fully Self-Powered, Ultra-Stable Cholesteric Smart Window Triggered by Instantaneous Mechanical Stimuli. Nano Energy, 85, Article 105976. [Google Scholar] [CrossRef]