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Energy Balance Control of Series-connected Lithium Batteries Based on SOC
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Chunyan MA1, Qinglong WANG1, Di ZHANG2, Chunjiang ZHANG2
Journal of Power Supply | 2024, 22(2) : 216 - 223
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Journal of Power Supply | 2024, 22(2): 216-223
• Battery and Energy Storage •
Energy Balance Control of Series-connected Lithium Batteries Based on SOC
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Chunyan MA1, Qinglong WANG1, Di ZHANG2, Chunjiang ZHANG2
Affiliations
  • 1 State Grid East Inner Mongolia Power Supply Service Supervision and Support Center Tongliao 028000 China
  • 2 School of Electrical Engineering Yanshan University Qinhuangdao 066000 China
Published: 2024-03-30 doi: 10.13234/j.issn.2095-2805.2024.2.216
Outline
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The state-of-charge (SOC) balance control of series-connected lithium batteries is of significance to the improvement of battery life. In this paper, a hybrid SOC equalization scheme based on active-passive equalization is proposed against the SOC discreteness of a lithium battery cell, in which the topology of the active equalizer is realized by a multi-winding flyback converter, and the passive equalizer consists of a resistor and a switch connected in parallel at both ends of the cell. The operating principle for the hybrid SOC equalizer is analyzed in detail, and the effect of SOC discreteness on equalization speed is discussed in terms of control strategy. The standard deviation representing the degree of discreteness and the coefficient representing the reasons of discreteness are introduced to realize the fast equalization of SOC under different discrete conditions. The topology of the proposed hybrid equalizer and the corresponding control scheme can optimize energy consumption and balancing speed, and experimental results verify the feasibility of theoretical analysis.

Lithium battery  /  energy balance  /  state-of-charge (SOC) discreteness  /  active equalization
Chunyan MA, Qinglong WANG, Di ZHANG, Chunjiang ZHANG. Energy Balance Control of Series-connected Lithium Batteries Based on SOC[J]. Journal of Power Supply, 2024 , 22 (2) : 216 -223 . DOI: 10.13234/j.issn.2095-2805.2024.2.216
Funding
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  • National Natural Science Foundation of China(51877187)
Appendix
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Year 2024 volume 22 Issue 2
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Article Info
doi: 10.13234/j.issn.2095-2805.2024.2.216
  • Receive Date：2021-06-21
  • Online Date：2025-07-21
  • Published：2024-03-30
Article Data
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History
  • Received：2021-06-21
  • Revised：2021-08-27
  • Accepted：2021-09-01
Funding
National Natural Science Foundation of China(51877187)
Affiliations
    1 State Grid East Inner Mongolia Power Supply Service Supervision and Support Center Tongliao 028000 China
    2 School of Electrical Engineering Yanshan University Qinhuangdao 066000 China
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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