As an effective technique for enhancing integrating intermittent renewable energy into a power grid，battery energy storage has become one of the directions of preferred development for its unique performance.The characteristics，current application and to-be-solved key techniques of three advanced batteries（lithium，sodium sulfur and vanadium redox）are briefly described first.In particular，the construction of the battery energy storage system for renewable energy generation is analyzed，including the configuration mode，the battery system，the power condition system and system integration.In the end，the present application of the energy storage system in intermittent renewable energy generation is summed up and the problems in the construction and operation of the battery energy storage system are pointed out.