Structure self-adjusting type vehicle-mounted flywheel battery coping with multiple operation modes and operating method thereof

Patent metadata

Field	Value
Publication number	US-12062967-B2
Application number	US-202218007747-A
Country	US
Kind code	B2
Filing date	Jan 20, 2022
Priority date	Jan 4, 2022
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

A structure self-adjusting type vehicle-mounted magnetic suspension flywheel battery coping with multiple operation modes and an operating method thereof are provided. An ant-nest type channel is formed in a radiator of the flywheel battery along a circumferential direction, and a plurality of counterweight magnetic adsorption devices are symmetrically embedded in a flywheel lower sphere. When the flywheel battery operates in a charging mode, a standby mode or a discharging mode, the operation mode of the motor is flexibly changed according to different recovered energy levels or output energy levels, and the loss in the magnetic bearing system is reduced through matching of different types of magnetic bearings according to different disturbance levels. The low-loss, high-safety and stable operation of the vehicle-mounted magnetic suspension flywheel battery in various operation modes can be realized.

First claim

What is claimed is:

1. A structure self-adjusting type vehicle-mounted flywheel battery coping with multiple operation modes, comprising a vacuum housing, wherein a radiator, a flywheel axial magnetic bearing stator yoke, a flywheel, and a counterweight are sequentially arranged inside the vacuum housing from top to bottom;
an ant-nest type channel is formed in the radiator along a circumferential direction, a coolant is stored in the channel, an upper part of the channel is connected with a heat dissipation piece, and an end of the heat dissipation piece is arranged outside the vacuum housing;
a plurality of counterweight magnetic adsorption devices are symmetrically embedded in a lower sphere of the flywheel, each of the counterweight magnetic adsorption devices comprises a magnetic isolation sleeve, a permanent magnet, a spring and a resin cover, the magnetic isolation sleeve is embedded in the lower sphere of the flywheel, the permanent magnet is arranged inside the magnetic isolation sleeve, the spring is arranged at a lower end of the permanent magnet, and the magnetic isolation sleeve is sealed by the resin cover;
a counterweight axial passive magnetic bearing lower permanent magnet is mounted on an upper surface of a bottom cover of the vacuum housing, the counterweight axial passive magnetic bearing lower permanent magnet and a counterweight axial passive magnetic bearing upper permanent magnet are coaxial and are spaced apart from each other, and the counterweight axial passive magnetic bearing lower permanent magnet and the counterweight axial passive magnetic bearing upper permanent magnet constitute a counterweight axial passive magnetic bearing;
a flywheel motor stator core is coaxially arranged outside the radiator, a motor is arranged on the flywheel motor stator core, and a radial magnetic resistance magnetic bearing and a radial Lorentz force magnetic bearing are arranged inside the flywheel;
a flywheel axial Lorentz force magnetic bearing stator yoke is fixed on a central axis of the flywheel axial magnetic bearing stator yoke, a flywheel axial Lorentz force magnetic bearing control coil is wound on the flywheel axial Lorentz force magnetic bearing stator yoke, and the flywheel axial Lorentz force magnetic bearing control coil and an axial Lorentz force magnetic bearing permanent magnet constitute a flywheel axial Lorentz force magnetic bearing;
a flywheel axial passive magnetic bearing upper permanent magnet is embedded in a lower end of the flywheel axial magnetic bearing stator yoke, and the flywheel axial passive magnetic bearing upper permanent magnet and the flywheel axial passive magnetic bearing lower permanent magnet constitute a flywheel axial passive suction magnetic bearing; and
a flywheel axial Halbach axial passive magnetic bearing is mounted in a center of the bottom cover of the vacuum housing.

2. The structure self-adjusting type vehicle-mounted flywheel battery according to claim 1 , wherein the motor is a first flywheel motor and a second flywheel motor, and internal air gaps of the first flywheel motor and the second flywheel motor are cone-shaped; and the first flywheel motor and the second flywheel motor have an identical radial air gap length, and a rated power of the first flywheel motor is less than that of the second flywheel motor.

3. The structure self-adjusting type vehicle-mounted flywheel battery according to claim 2 , wherein a permanent magnet of the first flywheel motor and a coil of the second flywheel motor are axially coupled in an axial direction, and have a cone-shaped air gap in a radial direction.

4. An operating method of the structure self-adjusting type vehicle-mounted flywheel battery according to claim 3 , comprising:
drawing the counterweight to a bottom end of the flywheel by the counterweight magnetic adsorption device, so that a balanced state of the flywheel axial passive magnetic bearing and the flywheel axial Lorentz force magnetic bearing is broken, and the flywheel fall with the counterweight; at this moment the flywheel axial Halbach axial passive magnetic bearing operating to balance the flywheel battery in the axial direction; and
powering a control coil of the radial magnetic resistance magnetic bearing continuously, and not powering a control coil of the radial Lorentz force magnetic bearing.

5. An operating method of the structure self-adjusting type vehicle-mounted flywheel battery according to claim 2 , comprising:
powering a coil of the first flywheel motor and a coil of the first flywheel motor at the same time when a flywheel battery system starts, to obtain a maximum starting torque;
powering the coil of the first flywheel motor alone when a recovered energy power is less than the rated power of the first flywheel motor;
powering the coil of the second flywheel motor alone when the recovered energy power is greater than the rated power of the first flywheel motor and less than the rated power of the second flywheel motor;
powering the coil of the first flywheel motor and the coil of the second flywheel motor at the same time when the recovered energy power is greater than the rated power of the second flywheel motor;
powering a control coil of the radial magnetic resistance magnetic bearing continuously, and powering a control coil of the radial Lorentz force magnetic bearing intermittently according to a disturbance intensity; and
the flywheel axial passive suction magnetic bearing and the flywheel axial Lorentz force magnetic bearing operating in cooperation with each other.

6. The structure self-adjusting type vehicle-mounted flywheel battery according to claim 1 , wherein the motor is a first flywheel generator and a second flywheel generator, and internal air gaps of the first flywheel generator and the second flywheel generator are cone-shaped; and the first flywheel generator and the second flywheel generator have an identical radial air gap length, and an output voltage level of the first flywheel generator is lower than that of the second flywheel generator.

7. An operating method of the structure self-adjusting type vehicle-mounted flywheel battery according to claim 6 , comprising:
releasing the counterweight from a bottom end of the flywheel by the counterweight magnetic adsorption device, so that a balanced state of the flywheel Halbach axial passive magnetic bearing is broken, and the flywheel moves upward to restore an axial balance;
outputting energy of different voltage levels to a vehicle control circuit and a traction system by the first flywheel generator and the second flywheel generator respectively;
powering a control coil of the radial magnetic resistance magnetic bearing continuously, and powering a control coil of the radial Lorentz force magnetic bearing intermittently according to a disturbance intensity; and
the flywheel axial passive suction magnetic bearing and the flywheel axial Lorentz force magnetic bearing operating in cooperation with each other.

8. The structure self-adjusting type vehicle-mounted flywheel battery according to claim 1 , wherein an upper universal spherical bearing and a lower universal spherical bearing are radially arranged on the counterweight, a radial air gap exists between the upper universal spherical bearing and the counterweight, and a radial air gap exists between the lower universal spherical bearing and the counterweight.

9. The structure self-adjusting type vehicle-mounted flywheel battery according to claim 1 , wherein an upper cover of the vacuum housing is provided with a vacuum pumping pipeline and an air intake pipeline, and a solenoid valve is mounted at the air intake pipeline.

Assignees

• Univ Jiangsu

Inventors

• Zhang Weiyu
• Zhang Xiaoxiao
• Cui Junjie
• Gu Xiaowei
• Shan Long
• Yu Yanjun
• Diao Xiaoyan

Classifications

• F16F15/31

  characterised by means for varying the moment of inertia · CPC title

• H02K7/02

  Additional mass for increasing inertia, e.g. flywheels · CPC title

• H02K7/09

  with magnetic bearings · CPC title

• Y02E60/16

  Mechanical energy storage, e.g. flywheels or pressurised fluids · CPC title

• H02K7/025 Primary

  for power storage · CPC title