Kinetic Energy Storage

Technology

KEST has developed a unique superflywheel-based energy storage system with wide range of industrial applications including electrical grids and infrastructure. Our energy storage system survives unlimited number of high-power 100% SOC discharge cycles without degradation or loss in capacity, while being completely eco-friendly and operationally safe.

Накопитель Кинетической Энергии — Супермаховик — KEST — Superflywheel — Kinetic Energy Storage

Superflywheel

The two key elements of Flywheel energy storage (FES) are superflywheel and powerful electric motor/generator
  • At the core of FES lies superflywheel –  a next-generation flywheel made of a solid core (hub) and multiple layers of high-strength steel ribbon wound around it

  • A single FES unit may contain one or multiple superflywheels to adjust energy capacity depending on the application

  • Unique properties of the superflywheel make our storage unit completely operationally safe

 
 

Advantages

Higher Power

Higher total power(up to 1000 kW) and power density (kW/kg) 

Superfast charge and discharge

Full discharge or charge in less than 30 seconds

Unlimited number of cycles

Unlimited number of 100% DOD cycles without degradation 

Longer Service Life

Long  service life of 25 years

Lower Cost

One of the lowest costs ($/kW) among any energy storage technology 

Eco friendly and sustainable

Manufactured using non-toxic and environmentally friendly materials, easily recyclable once the service life is over

Complete operational safety

Explosion-and bursting proof

Immediate switch from charging to discharging

Switch in less than 30 milliseconds

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Technical information

  • Energy capacity – 5 kWh

  • Power – 100-1000 kW

  • Voltage – 380V (AC) 400-1000V (DC)

  • Energy efficiency – 80-95%

  • Weight – 800 kg

  • Size – 1200mm Х 600mm Х 600mm

 

Operating principles

FES captures and stores electrical energy by converting it into kinetic energy of the spinning flywheel
  • To capture the energy electric motor spins up the flywheel (transforming electrical energy into kinetic energy of the rotating flywheel) 

  • To store the energy electric motor is disengaged and superflywheel spins freely inside the chamber with low pressure

  • To release the energy electric motor switches to a generator mode and uses the kinetic energy of superflywheel’s rotation to spin the rotor and generate electrical energy

Принципы работы Накопителя кинетической энергии KEST — Kinetic Energy Storage Operating principles

Project status

  • Three generations of working prototypes produced and refined

  • FES performance, efficiency, and safety even under the most extreme conditions  confirmed by multiple tests

  • Necessary design and technical documentation for mass production developed

  • Production of a FES unit for piloting and field testing launched

 

Patents and scientific publications

Russia

Superflywheel kinetic energy storage

Patent

RU144074U1

Russia

Superflywheel based regenerative braking system for electric rolling stock

Patent

RU132405U1

Russia

Superflywheel kinetic energy storage

Patent

RU133233U1

Russia

Distributed Power System

Patent

WO 2020/005096 Al

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Nurbei Gulia

Alexander Lavrentiev

About "superflywheel" patent that has "amazed" the experts

© НиТ. Cтатьи, 12/13/1997

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Nurbei Gulia

Supeflywheel - present and future

http://lit.lib.ru, 12/26/2020

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Nurbei Gulia

Illustrations for "Encyclopedia of Gulia"

http://lit.lib.ru, 12/04/2011

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Nurbei Gulia

Alexander Lavrentiev

Energy capacity and power

http://lit.lib.ru, 06/29/2020

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Nurbei Gulia

Mass electric car - another " idea fix"

http://lit.lib.ru, 10/08/2018

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"Incredible mechanisms"

The superflywheel of Nurbei Gulia – mechanical energy storage. Part 1

Incredible mechanisms, 03/06/2019