低轨卫星电源系统锂离子电池组主被动混合均衡拓扑
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作者单位:

1.国网南昌供电公司;2.浙江大学电气学院

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基金项目:

国家自然科学基金资助项目(61963030);江西省电力有限公司科技项目(5218A020003A)。


Li-ion battery pack active-passive hybrid equalization topology for Low-earth Orbit satellite power system
Author:
Affiliation:

1.State Grid Jiangxi Power Company;2.College of Electrical Engineering,Zhejiang University

Fund Project:

National Natural Science Foundation of China under Grant 61963030, Science Foundation of State Grid under Grant 5218A020003A

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    摘要:

    低轨卫星电源中锂离子电池均衡系统是保障电池单体一致性,充分利用电池组容量,提高电池可靠性和循环寿命的重要部分。被动均衡技术由于结构简单、控制容易等优点,在直流母线卫星电源系统中占绝对主要地位。但是,被动均衡有热设计复杂的缺点,而且往往仅在电池充电时均衡,会导致电池单体放电深度不能得到一致控制,从而影响电池组寿命。主动均衡技术具有较高的效率和均衡速度,而且可以采用智能化的控制方法,是锂离子电池均衡技术的主流发展方向。主动均衡技术往往需要大量的开关和储能器件、复杂的控制算法,存在体积大以及可靠性低的缺点。现有的大多数主动均衡技术还不能直接应用于直流母线卫星电源系统。本文根据低轨卫星电源储能蓄电池的工作特性,提出一种基于开关矩阵的主被动混合均衡拓扑,具有结构简单、控制容易、可靠性高的优点,并通过实验证明其可行性。

    Abstract:

    The lithium-ion battery equalization system in Low-earth orbit (LEO) satellite power supply is an important part to guarantee the consistency of battery cells, make full use of battery pack capacity, and improve battery reliability and cycle life. Passive equalization technology is dominant in DC bus satellite power supply systems due to its simple structure and easy control. However, passive equalization has the disadvantage of complex thermal design and often equalizes only when the battery is charging, which can lead to inconsistent control of the battery"s individual depth of discharge, thus affecting the battery pack life. Active equalization technology has higher efficiency and equalization speed, and can use digital control methods, which is the mainstream development direction of Li-ion battery equalization technology. Active equalization technology often requires a large number of switches and energy storage devices, complex control algorithms, and has the disadvantage of large size and low reliability. Most of the existing active equalization techniques cannot be directly applied to DC bus satellite power systems. In this paper, based on the operating characteristics of the low-orbit satellite power storage battery, an active-passive hybrid equalization topology based on the switching matrix were proposed, which has the advantages of simple structure, easy control and high reliability, and its feasibility has been proved through experiments.

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  • 收稿日期:2022-06-04
  • 最后修改日期:2022-08-17
  • 录用日期:2022-08-12
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