The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2026
Filed:
Dec. 30, 2021
Zhejiang University, Zhejiang, CN;
Chushan Li, Zhejiang, CN;
Wuhua Li, Zhejiang, CN;
Shengdao Ren, Zhejiang, CN;
Chengmin Li, Zhejiang, CN;
Lin Zhu, Zhejiang, CN;
Jing Sheng, Zhejiang, CN;
Xiangning He, Zhejiang, CN;
ZHEJIANG UNIVERSITY, Hangzhou, CN;
Abstract
A switched-capacitor type modular direct-current power supply with a high step-down ratio includes an upper modular cascade circuit string and/or a lower modular cascade circuit string, a load, and an input source. The upper and lower modular cascade circuit strings respectively include i upper submodule circuits and j lower submodule circuits. All the submodule circuits are non-isolated three-port resonant switched-capacitor circuits including input and output capacitors connected in series. The power supply is formed, by modular cascades, into a high-step-down-ratio direct-current power supply having high voltage direct-current input and low voltage direct-current output. Combination modes of modules include cascading of upper module strings, cascading of lower module strings, and mixed cascading of the upper and lower module strings. Flexible expansion can be performed based on voltage and power class requirements, without involving any voltage or current measurement apparatus.