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1. (WO2016055658) STATE OF CHARGE MANAGEMENT IN BATTERY SYSTEMS

Pub. No.:    WO/2016/055658    International Application No.:    PCT/EP2015/073518
Publication Date: Fri Apr 15 01:59:59 CEST 2016 International Filing Date: Tue Oct 13 01:59:59 CEST 2015
IPC: H02J 3/38
H02J 7/34
H02J 3/32
Applicants: ABB SCHWEIZ AG
Inventors: OUDALOV, Alexandre
POLAND, Jan
FERREAU, Joachim
JOHANSSON, Nicklas
TENGNER, Tomas
Title: STATE OF CHARGE MANAGEMENT IN BATTERY SYSTEMS
Abstract:
10 CH-14112-WO-PCT ABSTRACT The present invention is concerned with strategies to manage the State of Charge (SoC) of a battery which is used to limit ramp rates of a renewable power plant. The proposed 5 management system relies on a SoC target that is defined by the energy to be absorbed or provided, either in a worst case or most likely (statistical, forecast) scenario. It facilitates smaller dimensioning of the Battery Energy Storage System (BESS), while still guaranteeing the required level of availability. The SoC management likewise reduces the energy throughput, and thus both improves system efficiencies through reduced losses and extends 10 the lifetime of the battery through reduced cycle degradation. Both aspects contribute to lowering costs of the BESS. Integration of relevant environmental conditions and / or available short term predictions further improves the resulting economies. The SoC management system is conceptually simple and can easily be implemented even on a cheap controller hardware with little computational power.15 Fig.2