Application of Losing Partial Capacity Lithium Batteries of Parallel Operation in Energy Storage System

doi:10.11930/j.issn.1004-9649.2013.8.59.4

Abstract

Abstract: Power lithium batteries, which are replaced from electric vehicle, can be called losing partial capacity lithium batteries and be used in energy storage system with restraining fluctuant power in distribution network after being screened and grouped, but their capacities and charge-discharge efficiency become lower because of internal resistance being larger. So a method of losing partial capacity lithium Batteries of parallel operation based on double loops of voltage and current is proposed according to internal resistance characteristic and external characteristic of power Li-battery of losing partial capacity. Charge-discharge efficiency of losing partial capacity lithium batteries can be improved and better accuracy of power tracking can be obtained in the case of restraining fluctuant power. The results of simulations and experiments demonstrate that charge-discharge efficiency of losing partial capacity lithium batteries of parallel operation and accuracy of restraining fluctuant power can be improved, and the feasibility of the proposed method are validated.

Key words: partial energy lost Li-battery, bi-direction DC/DC, power fluctuation, power tracking, energy storage

CLC Number:

TM911

LIN Shao-bo, HAN Min-xiao, SUN Hai, LUO Chao. Application of Losing Partial Capacity Lithium Batteries of Parallel Operation in Energy Storage System[J]. Electric Power, 2013, 46(8): 59-63.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.8.59.4

https://www.electricpower.com.cn/EN/Y2013/V46/I8/59

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