Compact flywheel energy storage battery

Abstract

The invention discloses a compact flywheel energy storage battery, and belongs to the technical field of electric energy storage. The battery comprises: an energy storage flywheel which is formed by stacking at least one hollow flywheel disc on a flywheel rotating shaft; an upper end cover and a lower end cover which are respectively arranged on the upper side and the lower side of the energy storage flywheel; a machine shell which is fixed between the upper end cover and the lower end cover, wherein the machine shell, the upper end cover and the lower end cover form a vacuum cavity; a high-speed motor which is arranged between the upper end cover and the energy storage flywheel or between the energy storage flywheel and the lower end cover; and a mechanical bearing and a permanent magnet bearing. The high-speed motor is fixed on the stepped rotating shaft and is provided with an annular water channel. The axial length of the flywheel energy storage battery is reduced, the structure is compact, simple and reliable, and the material consumption is reduced. In the same vacuum cavity, more hollow flywheel discs can be stacked to form a flywheel energy storage battery with larger capacity; and different flywheel energy storage batteries can form a flywheel energy storage battery pack with larger capacity and larger power through flanges arranged on the upper end cover and the lower end cover.

Description

technical field [0001] The invention belongs to the technical field of electric energy storage, and more specifically relates to a compact flywheel energy storage battery. Background technique [0002] With the continuous development and development of new energy technologies, energy storage technology has received extensive attention. Among the existing energy storage technologies, the flywheel energy storage device has the advantages of good dynamic performance and no secondary pollution, which has attracted more and more attention. The flywheel energy storage device includes the flywheel rotor, generator, permanent magnetic bearing, mechanical bearing and motor casing. In the limited space of the vacuum machine cavity, how to improve the heat dissipation efficiency and how to choose the structure and installation method of each component make the vacuum machine The full and reasonable use of cavity space has become a concern of the public. [0003] In addition, after th...

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Problems solved by technology

[0003]In addition, after the design of the flywheel energy storage device is completed, its energy storage capacity and motor power can only change within a small range, and cannot be applied to larger capacity and more In the case of high power, a larger volume of flywheel energy storage battery is required, which will cause problems such as increased floor space and difficult handling

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