应用于压电能量源的高效同步电容开关能量收集芯片设计

doi:10.11930/j.issn.1004-9649.202009095

中国电力 ›› 2021, Vol. 54 ›› Issue (10): 125-133.DOI: 10.11930/j.issn.1004-9649.202009095

• 国家“十三五”智能电网重大专项专栏：（五）电力传感技术及应用专栏 • 上一篇下一篇

应用于压电能量源的高效同步电容开关能量收集芯片设计

范世全, 陈云翔, 谢鹰, 袁晨曦

西安交通大学微电子学院，陕西西安 710049

收稿日期:2020-09-09 修回日期:2021-08-31 出版日期:2021-10-05 发布日期:2021-10-16
作者简介:范世全(1980-),男,通信作者,博士,副教授,博士生导师,从事能量收集、电源管理等数模混合集成电路研究,E-mail:junjunfan@xjtu.edu.cn;陈云祥(1995-),男,硕士研究生,从事压电能量收集接口芯片电路研究,E-mail:yxchen@stu.xjtu.edu.cn
基金资助:
国家自然科学基金面上资助项目(面向超宽频段声场的高效率音频能量俘获芯片关键问题研究，62074124)；中央高校基本科研业务费专项资金资助项目(应用于超宽频段声场的高效率音频能量俘获芯片关键技术研究，xzy012020011)

Synchronized Switch Harvesting on Capacitor Integrated Circuit for Piezoelectric Energy Harvesting Application

FAN Shiquan, CHEN Yunxiang, XIE Ying, YUAN Chenxi

School of Microelectronics, Xi'an Jiaotong University, Xi'an 710049, China

Received:2020-09-09 Revised:2021-08-31 Online:2021-10-05 Published:2021-10-16
Supported by:
This work is supported by National Natural Science Foundation of China (Study on Key Issues of High Efficiency Acoustic Energy Harvesting IC for Ultra-Band Sound Field, No. 62074124) and Fundamental Research Funds for the Central Universities ( Study on Key Techniques of High Efficiency Acoustic Energy Harvesting IC for Ultra-Band Sound Field Application, No. xzy012020011).

摘要/Abstract

摘要： 针对压电能量源，提出了一种具有压电能量源极性判定的高效改进型单脉冲序列可配置能量收集接口电路芯片。该芯片通过采用同步电容开关接口电路，实现了在压电能量源内部电流源过零时的电荷再分享，将压电能量源内部电容上的电荷转移至外部电容，再通过开关控制，实现外部电容上的电荷翻转，最后将翻转后的电荷输送回压电能量源内部电容。该方法避免了压电能量源内部电容上存储的电荷被内部电流源过零后中和而造成的能量损失，实现了较高的能量俘获效率。通过采用0.18 μm标准CMOS工艺完成电路和版图设计，芯片版图有效面积仅需0.06 mm²。仿真结果显示：在压电能量源开路电压为2.8 V时，能够实现最高81.8%的电压翻转效率，与标准的全桥整流结构压电接口电路相比较，所提出的结构在能量俘获能力方面实现了最大8.1倍的提升。

关键词: 能量收集芯片, 压电能量收集, 同步电容开关, 有源整流器, 接口电路, 集成电路

Abstract: An improved efficient energy harvesting integrated circuit is proposed for piezoelectric energy sources. By using the synchronized switch harvesting on capacitor (SSHC) interface circuit, the charge re-sharing is realized when the internal current source of the piezoelectric energy source crosses zero. The charge on the internal capacitance of the piezoelectric energy sources is transferred to the external capacitor, and then the charge on the external capacitor is reversed through switch control, and finally the reversed charge is transferred back to the internal capacitor. This method avoids the energy loss caused by the charge stored on the internal capacitance of the piezoelectric energy source being neutralized after the internal current source crosses zero, which achieves higher energy harvesting efficiency. The designed SSHC circuit is fabricated with standard 0.18 μm CMOS process, with an active area of about 0.06 mm². The post-simulation results show that when the open-circuit voltage (OCV) of the piezoelectric energy sources is 2.8 V, the maximum voltage flip rate of 81.8% can be achieved. Compared with the standard full bridge rectifying structure, the proposed structure achieves the maximum 8.1X improvement in energy harvesting capability.

Key words: energy harvesting chip, piezoelectric energy harvesting, synchronized switch harvesting on capacitor, active rectifier, interface circuit, integrated circuit

范世全, 陈云翔, 谢鹰, 袁晨曦. 应用于压电能量源的高效同步电容开关能量收集芯片设计[J]. 中国电力, 2021, 54(10): 125-133.

FAN Shiquan, CHEN Yunxiang, XIE Ying, YUAN Chenxi. Synchronized Switch Harvesting on Capacitor Integrated Circuit for Piezoelectric Energy Harvesting Application[J]. Electric Power, 2021, 54(10): 125-133.

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应用于压电能量源的高效同步电容开关能量收集芯片设计

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