the paper introduces the energy storage principle, characteristics and existing problems of the chemical battery which is suitable for the new energy power generation: lead-acid batteries, lithium ion batteries, sodium sulfur battery, vanadium redox flow battery, and compares the technical characteristics 、economic characteristics and securities of all kinds of storage battery, and draws the conclusion that the vanadium redox flow battery is the best choice of the battery used in energy storage system on the basis of the analysis of the characteristics demand of the energy storage battery used in wind / photovoltaic power station.