PRODUCT
FLYWHEEL ENERGY STORAGE
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Energy storage: When the energy storage flywheel is charged, electrical energy is input from the outside through power electronic devices. The bidirectional motor operates as an electric motor during energy storage, generating a rotating magnetic field through the energized coil and acting on the rotor to form a magnetic electric force rotating torque, driving the flywheel to accelerate and rotate, and storing kinetic energy in the flywheel.
Release energy: When the energy storage flywheel outputs electrical energy to the outside, the bidirectional motor operates as a generator, converting the kinetic energy of the flywheel rotor into electrical energy in the stator winding, and then converting the electrical energy into the frequency and voltage required by the load through a power electronic conversion device. The flywheel rotor slows down during the process of releasing energy.
Energy storage and release are achieved through the acceleration and deceleration of the flywheel rotor.
PRODUCT FEATURES
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Green and environmentally friendly
No explosion or fire hazards throughout the entire lifecycle, no production of toxic or harmful substances, and no pollution to the environment
High rate charging and discharging capability
Up to 4C~60C magnification or higher
Ultra high reliability
Long term frequent deep charging and discharging operation can also ensure ultra-high reliability, with an average time between failures far greater than that of chemical batteries
Wide working temperature range
Not sensitive to working environment temperature, with strong adaptability to environmental temperature
Modular design
Adopting modular design, with simple interfaces and flexible layout
Long lifespan>30 years
Up to 10 million deep cycle charging and discharging capabilities, energy storage is not affected by the number of discharges, and the operating life can reach more than 30 years
High conversion efficiency, low loss, low maintenance
Conversion efficiency>95%, minimal mechanical losses in magnetic levitation bearings and vacuum environments, low maintenance requirements
Highly recyclable residual value
Retired flywheel batteries can be directly recycled, with high residual value and low secondary recycling costs
Millisecond level response
Delay in charging and discharging switching of energy storage system
Less than 100 milliseconds
No special fire protection and temperature control system required
No fire protection and temperature control system equipment and maintenance work
MAIN PRODUCTS PROMOTED IN THE RAIL INDUSTRY
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| Project | Product Parameters |
| Standards | GB/T 36287-2018 Urban Rail Transit Train Regenerative Braking Energy Ground Utilization System |
| Participated in track projects | Qingdao Metro Line 1, Qingdao Metro Line 2, Qingdao Metro Line 6, Guangzhou Metro Line 18 |
| Model | 1MW/40MJ |
| Unit capacity (KW/set) | 1000 |
| Number of units with 3000kW RESS | 3 |
| Equipment size（mm） | W3200*D1000*H2200 |
| Equipment weight（kg） | 3600kg |
| Thermal load of 3000kW RESS（KW） | 66 |
| Minimum/maximum speed【rpm】 | 6500/13000 |
| Rotor material | High strength alloy |
| Cooling method | Forced air cooling of water chiller |
| Methods for releasing excess energy | Resistance |
| Required preventive maintenance | Inspect vacuum pumps, water-cooled unit fans, pipelines, inverter cabinets, etc. every 6 months |
| Required spare parts | Fuses, auxiliary bearings, O-rings, dust-proof cotton, etc |
| Equipment life | 30years |
| Response time | 8ms |
YANSHEN PRODUCT MODEL
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| Model configuration |
1MW/40MJ |
300kW/100MJ |
1MW/650MJ |
| Peak power speed |
13000rpm |
15000rpm |
13000rpm |
| Rated voltage |
1500VDC |
1000VDC |
1000VDC |
| Application scenarios | Rail Transit |
Wind power/grid frequency regulation/UPS |
Wind power/grid frequency regulation |
| Electrical machinery | Permanent magnet synchronization | Permanent magnet synchronization |
Permanent magnet synchronization |
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Flywheel energy storage density(Wh/kg ) |
9.3 |
19.8 |
23.8 |
| Depth Of Discharge |
75% |
75% |
75% |
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Energy conversion efficiency(%) |
>88% |
>88% |
>85% |
| BEARING TYPE | Permanent magnet biased hybrid electromagnetic bearing | Permanent magnet biased hybrid electromagnetic bearing | Permanent magnet biased hybrid electromagnetic bearing |
| Running state | Vacuum | Vacuum | Vacuum |
| Product self loss |
<3‰ rated power |
<3‰ rated power |
<3‰ rated power |
| Cooling method | water-cooling | water-cooling | water-cooling |
| Rotor form | Metal | Metal+composite material | Metal |
| Suitable for environmental humidity |
≤95% |
≤95% |
≤95% |
| Suitable for ambient temperature |
-40~45℃ |
-40~45℃ |
-40~45℃ |
| Number of cycles |
1000million times |
1000万次 |
1000million times |
APPLICABLE SCENARIOS
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Flywheel energy storage is suitable for high-power, fast response, and high-frequency scenarios, with typical markets including rail transit, power grid frequency regulation, and UPS market. In the future, there will also be emerging markets such as charging piles and construction machinery.
Rail Transit
At present, the electric energy recovered by subway trains entering the station is consumed through resistance heat dissipation, which leads to resource waste and impacts on the power grid. Flywheel energy storage will recover electrical energy when the train enters the station and release it when the train exits, playing a role in energy conservation and grid friendliness.
Power Grid Frequency Regulation
Flywheel energy storage has the characteristics of high power, fast response speed, and strong cycling ability. It can quickly and effectively compensate for active/reactive power with changes in the power grid, smooth out fluctuating loads, buffer power generation output transients, support grid frequency and voltage, and has good application prospects.
Energy storage electric vehicle charging station
Using magnetic levitation energy storage flywheels as energy storage devices, fully utilizing the typical operating characteristics of slow charging and fast discharging of energy storage flywheels, namely low-power charging and high-power output, can not only meet the requirements of fast charging for electric vehicles, but also avoid the constraints of grid capacity expansion. At the same time, due to the high power density, small size, flexible layout, green and pollution-free nature of energy storage flywheels, they can be placed underground, eliminating the impact of building charging stations on the city's appearance and reducing the pressure of urban construction work.
UPS Market
Mainly used in scenarios with uninterruptible power supply requirements, such as data centers, communication base stations, etc., utilizing its advantages of fast response speed, high instantaneous power, small footprint, and long service life.
