Flywheel battery

Abstract

The invention relates to a flywheel energy storage device, in particular to a flywheel battery with a rapid charging and discharging function. The flywheel battery comprises a flywheel device and a driving device which drives the flywheel to rotate. The flywheel device comprises a flywheel, a flywheel rotating shaft and magnetic suspension bearings at the two ends of the flywheel rotating shaft. The periphery of the flywheel device is provided with a vacuum enclosed hood which is in interference fit with the magnetic suspension bearings. The flywheel is made from a magnetic material or internal magnets are fixedly arranged on the flywheel. The driving device comprises a transmission shaft and a rotor. One end of the transmission shaft is fixedly connected with the rotor, and the other end of the transmission shaft is connected with a motor or an engine. The rotor is made from the magnetic material or external magnets are arranged on the rotor. A gap is reserved between the rotor of the driving device and the flywheel device. The axis of the rotor is parallel to or overlapped with that of the flywheel rotating shaft. The flywheel and the rotor drive each other through a magnetic force. By the flywheel battery, energy storage capacity can be improved and service life can be prolonged; and the flywheel battery is convenient to produce in batches, maintain and service.

Description

Technical field [0001] The invention relates to a flywheel energy storage device, in particular to a flywheel battery capable of rapid charging and discharging. Background technique [0002] At present, the more commonly used batteries in people's production and life are mostly chemical batteries, which convert electrical energy into chemical energy for storage, and then reduce chemical energy to electrical energy for output during use. Although the current chemical battery energy storage technology has been developed very mature, chemical battery energy storage technology has disadvantages such as low energy storage density, limited charge and discharge times, which leads to a short service life, serious environmental pollution, and high requirements for working temperature. . Flywheel energy storage, which uses physical methods to achieve energy storage, has received extensive attention from various countries in recent years as an emerging electrical energy storage method. [0...

AI Technical Summary

Problems solved by technology

However, in the air environment, the high-speed rotating flywheel will cause extremely high wind resistance loss, which greatly consumes the energy generated when the flywheel rotates, and the energy storage capacity of the battery is small, and the charging and discharging speed is slow.

[0005] 2) It is not feasible to use mechanical bearings in flywheel batteries

There is mechanical friction in mechanical bearings. When the flywheel rotates at high speed due to mechanical friction, it will not always maintain high-speed rotation, and due to mechanical friction, a large amount of heat will be generated on the bearing, resulting in energy loss, and it is impossible to achieve long-term effective storage of kinetic energy.

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