全球能源互联网2025，Vol.8Issue(3)：310-316,7.DOI:10.19705/j.cnki.issn2096-5125.2025.03.006
并联充电模块高精度自适应均流技术研究
High-precision Current Equalization Technology for Parallel Charging Module Auto-adapting to All Working Conditions
摘要
Abstract
The charging module of the emergency standby power supply for power plants and stations may experience uneven charging due to the degradation of its equivalence parameters,which will accelerate the aging of the power devices and the degradation of the maximum dischargable capacity of the batteries.In order to extend the working life of the charging module and provide high quality power supply for the battery,it is necessary to overcome the low-cost current equalization control technology of parallel charging module.This paper reveals the influence of circuit parameters and frequency increment on the current equalization effect of charging modules.propose an adaptive current equalization scheme for parallel modules,take the current deviation as observation and take the operating frequency as control,design the double-precision adaptive current equalization strategy and voltage selection circuit,give the working sequence of the double-precision adaptive control circuit when the battery is floating charging cycle,develop a prototype dual-precision adaptive current equalization charging module.The experimental results show that the parallel charging module based on double-precision adaptive current sharing technology has good robustness under all input and output conditions.The absolute current unbalance at 20%load(2A)and 50%load(5A)is less than 5%and 2.3%,respectively.关键词
并联充电模块/LLC变换器/均流电路/均流不平衡度Key words
parallel charging module/LLC converter/current equalization circuit/uneven degree of current equalization分类
信息技术与安全科学引用本文复制引用
李秉宇,杜旭浩,蔡子文,乔颖..并联充电模块高精度自适应均流技术研究[J].全球能源互联网,2025,8(3):310-316,7.基金项目
国家自然科学基金(52307199) （52307199）
国家电网有限公司科技项目(TSS2022-08). National Natural Science Foundation of China(52307199) （TSS2022-08）
Science and Technology Foundation of SGCC(TSS2022-08). （TSS2022-08）
