Flywheel Charging Buffer for Fast EV Charging in Limited Space

The patent replaces the conventional electrical energy storage system with a mechanical kinetic energy storage system using a flywheel. The flywheel stores energy mechanically through rotational motion, eliminating the need for large high-voltage power receiving facilities while maintaining quick charging capability. The rotary electric machine converts electrical energy to mechanical energy to spin the flywheel, which then releases kinetic energy to charge the vehicle battery rapidly.

The patent changes the energy storage parameter from electrical energy (in batteries) to kinetic energy (in rotating flywheel). This parameter change allows for more compact energy storage since kinetic energy density in a rotating mass can be higher than chemical energy density in batteries of comparable size, thereby reducing facility size while maintaining or improving charging speed.

The patent replaces expensive high-voltage power receiving infrastructure with a mechanical flywheel-based kinetic energy storage system. This substitution uses conventional voltage levels combined with a flywheel energy buffer, dramatically reducing facility cost while maintaining high charging speed through the rapid energy release capability of the spinning flywheel.

The patent employs a flywheel system that uses conventional, inexpensive electrical components at standard voltages rather than expensive high-voltage equipment. The kinetic energy storage in the flywheel acts as a temporary buffer that can be rapidly charged from the grid and discharged to the vehicle, providing quick charging service without requiring costly high-voltage receiving facilities.

The patent substitutes electrical energy storage (batteries) with mechanical kinetic energy storage (flywheel). The rotating flywheel can store significant kinetic energy in a compact form factor, providing high energy storage capacity without the large physical space required by battery systems of equivalent capacity. This mechanical approach enables dense energy storage that fits in limited spaces.

The patent changes the energy storage mode from chemical (batteries) to mechanical kinetic energy (flywheel rotation). This parameter change fundamentally alters the space-to-energy ratio, as kinetic energy can be stored at much higher densities in rotating mass compared to chemical energy in batteries, thereby reducing the required installation area while maintaining or increasing storage capacity.