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1. (WO2018145399) METHOD FOR CALIBRATING STATE OF CHARGE OF ENERGY STORAGE SYSTEM AND DEVICE

Pub. No.:    WO/2018/145399    International Application No.:    PCT/CN2017/092324
Publication Date: Fri Aug 17 01:59:59 CEST 2018 International Filing Date: Mon Jul 10 01:59:59 CEST 2017
IPC: G01R 31/36
Applicants: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
宁德时代新能源科技股份有限公司
Inventors: BAO, Fang Bin
鲍芳斌
YUE, Hong Liang
岳洪亮
WEI, Zhi Li
魏志立
Title: METHOD FOR CALIBRATING STATE OF CHARGE OF ENERGY STORAGE SYSTEM AND DEVICE
Abstract:
A method for calibrating a state of charge of an energy storage system, the energy storage system comprising a plurality of machine cabinets which are connected in parallel and which accommodate battery cores. The method comprises: acquiring a charge and discharge capacity of a battery core of each machine cabinet, calculating a battery core charge and discharge coefficient corresponding to the battery core of each machine cabinet according to the charge and discharge capacity of the battery core of each machine cabinet, and according to the charge and discharge capacity and the battery core charge and discharge coefficient of the battery core of each machine cabinet, then calibrating a state of charge of the battery core of each machine cabinet to obtain a calibrated state of charge (S101); sending the calibrated state of charge of the battery core of each machine cabinet to a charge and discharge control device, the charge and discharge control device performing charge and discharge control on the battery core of each machine cabinet according to the calibrated state of charge of the battery core of each machine cabinet (S102). A battery core charge and discharge coefficient Kx is added during a process of the energy saving system performing state of charge (SOC) calculation to perform calibration, which may improve SOC consistency between machine cabinets which are connected in parallel in the system.