基于能量传递的锂电池组双向主动均衡控制

IF 4.3 3区 工程技术 Q2 ENERGY & FUELS
Minghui Ma, Zhoufeng Liu, Jiangtao Xi, Jiyue Wang, Tao Yu
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引用次数: 0

摘要

针对锂离子电池(LIB)使用过程中各电池能量不一致的问题,构建了一种基于能量传递的锂电池组双向主动均衡拓扑结构,并根据开路电压(OCV)和充电状态(SOC)的对应关系,提出了相邻 SOC 差和电压的双变量均衡控制策略。电感器和锂电池之间的能量传递通过主电路和副电路的组合来实现。在降压-升压均衡电路的基础上,调整脉宽调制(PWM)驱动信号占空比,以提高均衡速度和效率。采用无香精卡尔曼滤波器(UKF)算法估算 SOC,并对每块单体电池的 SOC 进行估算和排序。锂电池充放电和静态仿真测试结果表明,与传统的单向传递感应式能量均衡方法相比,每节电池的 SOC 差值控制在阈值 3% 以内,电压范围控制在 0.01 V 以内,均衡速度提高了 51%。测试结果与仿真结果的变化趋势呈现出良好的一致性,避免了电池组的过充电和过放电,减少了不一致性。该方法能很好地完成电池的能量平衡管理,效率较高,提高了电池的使用寿命。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Bidirectional Active Equalization Control of Lithium Battery Pack Based on Energy Transfer

Bidirectional Active Equalization Control of Lithium Battery Pack Based on Energy Transfer

Aiming at the energy inconsistency of each battery during the use of lithium-ion batteries (LIBs), a bidirectional active equalization topology of lithium battery packs based on energy transfer was constructed, and a bivariate equalization control strategy of adjacent SOC difference and voltage is proposed according to the corresponding relationship between open circuit voltage (OCV) and state of charge (SOC). The energy transfer between the inductor and the lithium battery is realized through the combination of the main circuit and the secondary circuit. Based on the Buck–Boost equalization circuit, the pulse width modulation (PWM) drive signal duty ratio is adjusted to improve the equalization speed and efficiency. The SOC is estimated by the unscented Kalman filter (UKF) algorithm, and the SOC of each single battery is estimated and sorted. The results of charge and discharge and static simulation and test of lithium battery show that the SOC difference between each cell is controlled within the threshold value of 3%, the voltage range is controlled within the range of 0.01 V, and the equalization speed is increased by 51% compared with the traditional unidirectional transfer of inductive energy balancing method. The change trend of the test results and the simulation results show a good consistency, avoiding the overcharge and overdischarge of the battery pack, and reducing the inconsistency. This method can complete the energy balance management of the battery well, the efficiency is relatively high, and the service life of the battery is improved.

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来源期刊
International Journal of Energy Research
International Journal of Energy Research 工程技术-核科学技术
CiteScore
9.80
自引率
8.70%
发文量
1170
审稿时长
3.1 months
期刊介绍: The International Journal of Energy Research (IJER) is dedicated to providing a multidisciplinary, unique platform for researchers, scientists, engineers, technology developers, planners, and policy makers to present their research results and findings in a compelling manner on novel energy systems and applications. IJER covers the entire spectrum of energy from production to conversion, conservation, management, systems, technologies, etc. We encourage papers submissions aiming at better efficiency, cost improvements, more effective resource use, improved design and analysis, reduced environmental impact, and hence leading to better sustainability. IJER is concerned with the development and exploitation of both advanced traditional and new energy sources, systems, technologies and applications. Interdisciplinary subjects in the area of novel energy systems and applications are also encouraged. High-quality research papers are solicited in, but are not limited to, the following areas with innovative and novel contents: -Biofuels and alternatives -Carbon capturing and storage technologies -Clean coal technologies -Energy conversion, conservation and management -Energy storage -Energy systems -Hybrid/combined/integrated energy systems for multi-generation -Hydrogen energy and fuel cells -Hydrogen production technologies -Micro- and nano-energy systems and technologies -Nuclear energy -Renewable energies (e.g. geothermal, solar, wind, hydro, tidal, wave, biomass) -Smart energy system
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