CN115912667B - Modularized magnetic suspension flywheel battery energy storage system and control method thereof - Google Patents
Modularized magnetic suspension flywheel battery energy storage system and control method thereof Download PDFInfo
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- CN115912667B CN115912667B CN202310219419.5A CN202310219419A CN115912667B CN 115912667 B CN115912667 B CN 115912667B CN 202310219419 A CN202310219419 A CN 202310219419A CN 115912667 B CN115912667 B CN 115912667B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
The invention discloses a modularized magnetic suspension flywheel battery energy storage system and a control method thereof, wherein the modularized magnetic suspension flywheel battery energy storage system comprises a flywheel mechanism, a rotor supporting mechanism, a flywheel motor and a controller, the rotor supporting mechanism is arranged on the flywheel mechanism, the rotor supporting mechanism is used for carrying out axial mixed supporting on a flywheel rotor in the flywheel mechanism, the flywheel motor is arranged at the bottom of the flywheel mechanism through bolts, the flywheel motor is used for driving the flywheel rotor in the flywheel mechanism to rotate, the controller is arranged on the flywheel mechanism, and the controller controls the operation of the flywheel mechanism through the rotor supporting mechanism.
Description
Technical Field
The invention belongs to the technical field of flywheel battery energy storage, and particularly relates to a modularized magnetic suspension flywheel battery energy storage system and a control method thereof.
Background
The flywheel battery energy storage is a novel efficient mechanical energy storage technology capable of converting electric energy into rotational kinetic energy of a flywheel and storing the rotational kinetic energy, the flywheel battery energy storage system mainly comprises a flywheel rotor, a flywheel bearing system, a flywheel motor and a control system, in order to reduce friction loss of the flywheel battery energy storage system rotor and improve efficiency and reliability of the flywheel battery energy storage system, a flywheel battery energy storage system product on the market at present mainly adopts a supporting mode that a radial electromagnetic bearing is coupled with a traditional mechanical bearing, the radial electromagnetic bearing mainly provides radial constraint on the circumferential direction for the rotor and ensures stability of the rotor in a high-speed operation process, a rotating shaft of the flywheel motor is generally designed coaxially with the flywheel rotor, two or more radial electromagnetic bearings are arranged at the upper end and the lower end of the flywheel rotor, and meanwhile, the size of an air gap between the electromagnetic bearing and the rotating shaft is required to be reduced as much as possible, along with the development of the flywheel battery energy storage technology towards the directions of high rotating speed, high rotating inertia and stable and controllable dynamic operation, the existing flywheel battery energy storage system has the following defects:
1. the existing flywheel battery energy storage system is insufficient in stability and reliability in the circumferential direction, so that the situation of unstable stress of a flywheel rotor occurs in the running process, and the problems of failure of the magnetic suspension bearing and failure of the whole flywheel battery energy storage system occur;
2. in the existing flywheel battery energy storage system, a rotating shaft of a flywheel motor is generally designed coaxially with a flywheel rotor, so that the flywheel motor in the flywheel battery energy storage system does not have a modularized function in structure, and the flywheel battery energy storage system cannot be assembled and disassembled in a modularized mode;
in order to solve the problems of the flywheel battery energy storage system, a modularized magnetic levitation flywheel battery energy storage system and a control method thereof are provided.
Disclosure of Invention
The invention aims to provide a modularized magnetic suspension flywheel battery energy storage system and a control method thereof, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a modularization magnetic suspension flywheel battery energy storage system, includes flywheel mechanism, rotor supporting mechanism, flywheel motor and controller, rotor supporting mechanism installs flywheel mechanism is last, rotor supporting mechanism is used for right flywheel rotor in the flywheel mechanism carries out axial hybrid support, flywheel motor passes through the bolt to be installed flywheel mechanism's bottom, flywheel motor is used for the drive flywheel rotor in the flywheel mechanism rotates, the controller is installed flywheel mechanism is last, the controller passes through rotor supporting mechanism control flywheel mechanism's operation.
Preferably, the flywheel mechanism comprises a flywheel rotor, a flywheel housing, an upper end cover and a lower end cover, wherein a rotor accommodating cavity is formed among the flywheel housing, the upper end cover and the lower end cover, and the flywheel rotor is arranged in the rotor accommodating cavity.
Preferably, the flywheel housing, the upper end cover and the lower end cover are connected through bolts, the joint of the flywheel housing, the upper end cover and the lower end cover is sealed, and the rotor accommodating cavity is a sealed cavity.
Preferably, the rotor supporting mechanism comprises an upper bearing, a lower bearing and a magnetic suspension module;
the upper bearing is installed on the upper end cover, the upper bearing is connected with the flywheel rotor through a rotating shaft, the lower bearing is installed on the lower end cover, and the lower bearing is connected with the flywheel rotor through the rotating shaft of the flywheel motor.
Preferably, the flywheel motor is a permanent magnet synchronous motor, and a rotating shaft of the flywheel motor is connected with a rotating shaft of the flywheel rotor through a spline.
Preferably, the number of the magnetic suspension modules is several, and the magnetic suspension modules are arranged on the upper end cover in a circular array;
the magnetic suspension module is installed on the upper end cover through an installation seat, and the installation seat is connected with the upper end cover through a bolt.
Preferably, the positions of the upper end cover and the lower end cover, which correspond to the upper bearing and the lower bearing, are respectively provided with a pressure sensor, and the pressure sensors are used for monitoring the axial pressure of the upper bearing and the lower bearing under the axial electromagnetic tension of the magnetic suspension module in the running process of the flywheel rotor in real time.
Preferably, the controller is mounted on the upper end cover through bolts, and the magnetic suspension module and the pressure sensor are both connected with the controller.
Preferably, a supporting base is arranged at the bottom of the flywheel mechanism.
A control method of a modularized magnetic suspension flywheel battery energy storage system comprises the following steps:
a: before the flywheel mechanism works, air in a rotor cavity formed among the flywheel shell, the upper end cover and the lower end cover is pumped by a vacuum pump, so that the rotor cavity is in a vacuum state;
b: when the flywheel mechanism works, one group of the magnetic levitation modules are electrified, the rest magnetic levitation modules are standby, the electrified current of the magnetic levitation modules is regulated by the controller, so that the magnetic levitation modules generate electromagnetic pulling force corresponding to the gravity of the flywheel rotor, the flywheel rotor is in a levitation state in the rotor accommodating cavity, and when the electrified magnetic levitation modules fail, the controller automatically switches to the standby magnetic levitation modules, and normal conversion operation of the flywheel rotor is realized;
c: in a charging mode, the flywheel motor drives the flywheel rotor to rotate, and when the rotating speed of the flywheel rotor reaches the rated rotating speed, the flywheel rotor continuously rotates at a constant rotating speed in a vacuum environment of the rotor accommodating cavity;
d: in the running process of the flywheel rotor, the pressure sensor can monitor the axial pressure of the upper bearing and the lower bearing under the axial electromagnetic tension of the magnetic suspension module in the running process of the flywheel rotor in real time, pressure data monitored in real time by the pressure sensor are transmitted to the controller, the controller adjusts the electromagnetic tension of the magnetic suspension module to the flywheel rotor by adjusting the power-on current of the magnetic suspension module, and then the controller performs closed-loop control on the flywheel mechanism through the rotor supporting mechanism.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is provided with the pressure sensor and the plurality of magnetic suspension modules, the pressure sensor can monitor the axial pressure of the upper bearing and the lower bearing under the axial electromagnetic tension of the magnetic suspension module in the running process of the flywheel rotor in real time, and transmits the pressure data monitored by the pressure sensor to the controller in real time, and the controller adjusts the electromagnetic tension of the magnetic suspension module to the flywheel rotor by adjusting the power-on current of the magnetic suspension module, so that the magnetic tension of the magnetic suspension module is always equal to the self gravity of the flywheel rotor, the problem that the stress of the flywheel rotor is unstable in the running process is solved, and the running reliability and stability of the flywheel battery energy storage system are ensured;
2. the axial magnetic pulling force of the flywheel rotor is regulated through the magnetic suspension module, the axial load of the flywheel rotor on the upper bearing and the lower bearing is controlled, the working loss of the flywheel rotor is reduced, the service lives of the upper bearing and the lower bearing are prolonged, and the running reliability and stability of the flywheel battery energy storage system are further improved;
3. according to the invention, the flywheel motor adopts a modularized structural design and is arranged on the flywheel mechanism through bolts, meanwhile, the rotating shaft of the flywheel motor is connected with the rotating shaft of the flywheel rotor through splines, the flywheel motor and the flywheel rotor are decoupled in structure, the flywheel motor with corresponding power can be selected according to application scenes of the flywheel battery under different power levels, the upper end cover, the rotating shaft of the flywheel motor and the rotating shaft of the flywheel rotor are decoupled, the radial size of the end part of the flywheel rotor is reduced, the internal integration level of the flywheel mechanism is improved, the modularized disassembly and assembly are realized on the basis of not influencing the functions of the flywheel rotor, and the operation stability of the flywheel battery energy storage system is improved;
4. the invention is provided with a plurality of magnetic levitation modules, one group of the magnetic levitation modules is electrified, the other magnetic levitation modules are standby, and the electrified current of the magnetic levitation modules is regulated by the controller, so that the magnetic levitation modules generate electromagnetic pulling force corresponding to the gravity of the flywheel rotor, the flywheel rotor is in a levitation state in the rotor accommodating cavity, when the electrified magnetic levitation modules fail, the controller automatically switches to the standby magnetic levitation modules, the normal conversion operation of the flywheel rotor is realized, and the reliability of the flywheel battery energy storage system is improved;
5. compared with the traditional radial-axial magnetic suspension bearing, the magnetic suspension module has low cost, the axial magnetic suspension module has improved bearing capacity for the upper bearing and the lower bearing, and has simple structure, small volume and high assembly integration level.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic perspective view of the present invention;
FIG. 4 is a schematic diagram of the front view structure of the present invention;
fig. 5 is a schematic top view of the present invention.
In the figure: 1. a flywheel mechanism; 101. a flywheel rotor; 102. flywheel housing; 103. an upper end cap; 104. a lower end cap; 105. a rotor cavity; 2. a rotor support mechanism; 201. an upper bearing; 202. a lower bearing; 203. a magnetic suspension module; 204. a mounting base; 3. a flywheel motor; 4. a controller; 5. a pressure sensor; 6. and a supporting base.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, the modular magnetic levitation flywheel battery energy storage system provided by the invention comprises a flywheel mechanism 1, a rotor supporting mechanism 2, a flywheel motor 3 and a controller 4, wherein a supporting base 6 is arranged at the bottom of the flywheel mechanism 1, the rotor supporting mechanism 2 is arranged on the flywheel mechanism 1, the flywheel mechanism 1 comprises a flywheel rotor 101, a flywheel housing 102, an upper end cover 103 and a lower end cover 104, a rotor accommodating cavity 105 is formed among the flywheel housing 102, the upper end cover 103 and the lower end cover 104, and the flywheel rotor 101 is arranged in the rotor accommodating cavity 105;
the rotor supporting mechanism 2 is used for carrying out axial mixing support on the flywheel rotor 101 in the flywheel mechanism 1, the rotor supporting mechanism 2 comprises an upper bearing 201, a lower bearing 202 and a magnetic suspension module 203, the upper bearing 201 is arranged on an upper end cover 103, the upper bearing 201 is connected with the flywheel rotor 101 through a rotating shaft, the lower bearing 202 is arranged on a lower end cover 104, the lower bearing 202 is connected with the flywheel rotor 101 through a rotating shaft of a flywheel motor 3, the magnetic suspension module 203 is provided with a plurality of magnetic suspension modules 203 which are arranged on the upper end cover 103 in a circular array, the magnetic suspension module 203 is arranged on the upper end cover 103 through a mounting seat 204, the mounting seat 204 is connected with the upper end cover 103 through bolts, pressure sensors 5 are arranged on the upper end cover 103 and the lower end cover 104 at positions corresponding to the upper bearing 201 and the lower bearing 202, the pressure sensor 5 is used for monitoring the axial pressure to the upper bearing 201 and the lower bearing 202 under the axial electromagnetic tension of the magnetic suspension module 203 in the running process of the flywheel rotor 101 in real time, the pressure sensor 5 and a plurality of magnetic suspension modules 203 are arranged in the invention, the pressure sensor 5 can monitor the axial pressure to the upper bearing 201 and the lower bearing 202 under the axial electromagnetic tension of the magnetic suspension module 203 in the running process of the flywheel rotor 101 in real time, the pressure data monitored by the pressure sensor 5 is transmitted to the controller 4, the controller 4 adjusts the electromagnetic tension of the magnetic suspension module 203 to the flywheel rotor 101 by adjusting the power-on current of the magnetic suspension module 203, ensures that the magnetic tension of the magnetic suspension module 203 is always equal to the self gravity of the flywheel rotor 101, solves the problem of unstable stress of the flywheel rotor 101 in the running process, the running reliability and stability of the flywheel battery energy storage system are ensured; meanwhile, the axial magnetic tension of the flywheel rotor 101 is regulated through the magnetic suspension module 203, the axial load of the flywheel rotor 101 to the upper bearing 201 and the lower bearing 202 is controlled, the working loss of the flywheel rotor 101 is reduced, the service lives of the upper bearing 201 and the lower bearing 202 are prolonged, the running reliability and stability of the flywheel battery energy storage system are further improved, compared with the traditional radial-axial magnetic suspension bearing, the magnetic suspension module 203 in the invention has low cost, the bearing capacity of the axial magnetic suspension module 203 to the upper bearing 201 and the lower bearing 202 is improved, and the magnetic suspension system has simple structure, small volume and high assembly integration level;
the flywheel motor 3 is arranged at the bottom of the flywheel mechanism 1 through bolts, the flywheel motor 3 is a permanent magnet synchronous motor, a rotating shaft of the flywheel motor 3 is connected with a rotating shaft of the flywheel rotor 101 through a spline, the flywheel motor 3 is used for driving the flywheel rotor 101 in the flywheel mechanism 1 to rotate, the controller 4 is arranged on the flywheel mechanism 1, the controller 4 controls the operation of the flywheel mechanism 1 through the rotor supporting mechanism 2, the controller 4 is arranged on the upper end cover 103 through bolts, and the magnetic suspension module 203 and the pressure sensor 5 are connected with the controller 4;
according to the invention, the flywheel motor 3 is in a modularized structural design and is arranged on the flywheel mechanism 1 through bolts, meanwhile, the rotating shaft of the flywheel motor 3 is connected with the rotating shaft of the flywheel rotor 101 through splines, the flywheel motor 3 and the flywheel rotor 101 are decoupled in structure, the flywheel motor 3 with corresponding power can be selected according to application scenes of different power levels of the flywheel battery, the upper end cover 103, the rotating shaft of the flywheel motor 3 and the rotating shaft of the flywheel rotor 101 are decoupled, the radial size of the end part of the flywheel rotor 101 is reduced, the internal integration level of the flywheel mechanism 1 is improved, modularized disassembly and assembly are realized on the basis that the function of the flywheel rotor 101 is not influenced, and the operation stability of the flywheel battery energy storage system is improved.
The invention provides a control method of a modularized magnetic suspension flywheel battery energy storage system, which comprises the following steps:
a: before the flywheel mechanism 1 works, air in a rotor cavity 105 formed among the flywheel housing 102, the upper end cover 103 and the lower end cover 104 is pumped by a vacuum pump, so that the rotor cavity 105 is in a vacuum state;
b: when the flywheel mechanism 1 works, one group of the magnetic levitation modules 203 is electrified, the rest magnetic levitation modules 203 are standby, and the electrified current of the magnetic levitation modules 203 is regulated by the controller 4, so that the magnetic levitation modules 203 generate electromagnetic pulling force corresponding to the gravity of the flywheel rotor 101, the flywheel rotor 101 is in a levitation state in the rotor accommodating cavity 105, and when the electrified magnetic levitation modules 203 are in failure, the controller 4 automatically switches to the standby magnetic levitation modules 203 to realize normal conversion operation of the flywheel rotor 101;
c: in the charging mode, the flywheel motor 3 drives the flywheel rotor 101 to rotate, and when the rotation speed of the flywheel rotor 101 reaches the rated rotation speed, the flywheel rotor 101 continuously rotates at a constant rotation speed in the vacuum environment of the rotor accommodating cavity 105;
d: in the running process of the flywheel rotor 101, the pressure sensor 5 monitors the axial pressure of the upper bearing 201 and the lower bearing 202 under the axial electromagnetic tension of the magnetic suspension module 203 in the running process of the flywheel rotor 101 in real time, and transmits the pressure data monitored by the pressure sensor 5 in real time to the controller 4, the controller 4 adjusts the electromagnetic tension of the magnetic suspension module 203 to the flywheel rotor 101 by adjusting the power-on current of the magnetic suspension module 203, and then the closed-loop control of the controller 4 to the flywheel mechanism 1 by the rotor supporting mechanism 2 is realized.
The invention is provided with a plurality of magnetic levitation modules 203, wherein one group of the magnetic levitation modules 203 is electrified, the other magnetic levitation modules 203 are standby, and the electrified current of the magnetic levitation modules 203 is regulated by the controller 4, so that the magnetic levitation modules 203 generate electromagnetic pulling force corresponding to the gravity of the flywheel rotor 101, the flywheel rotor 101 is in a levitation state in the rotor accommodating cavity 105, and when the electrified magnetic levitation modules 203 fail, the controller 4 automatically switches to the standby magnetic levitation modules 203, thereby realizing normal conversion operation of the flywheel rotor 101 and improving the reliability of the flywheel battery energy storage system.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The modularized magnetic suspension flywheel battery energy storage system is characterized by comprising a flywheel mechanism (1), a rotor supporting mechanism (2), a flywheel motor (3) and a controller (4), wherein the rotor supporting mechanism (2) is installed on the flywheel mechanism (1), the rotor supporting mechanism (2) is used for carrying out axial mixed supporting on a flywheel rotor (101) in the flywheel mechanism (1), the flywheel motor (3) is installed at the bottom of the flywheel mechanism (1) through bolts, the flywheel motor (3) is used for driving the flywheel rotor (101) in the flywheel mechanism (1) to rotate, the controller (4) is installed on the flywheel mechanism (1), and the controller (4) is used for controlling the operation of the flywheel mechanism (1) through the rotor supporting mechanism (2);
the flywheel mechanism (1) comprises a flywheel rotor (101), a flywheel housing (102), an upper end cover (103) and a lower end cover (104), wherein a rotor accommodating cavity (105) is formed among the flywheel housing (102), the upper end cover (103) and the lower end cover (104), and the flywheel rotor (101) is arranged in the rotor accommodating cavity (105);
the flywheel housing (102), the upper end cover (103) and the lower end cover (104) are connected through bolts, the joints of the flywheel housing (102), the upper end cover (103) and the lower end cover (104) are sealed, and the rotor accommodating cavity (105) is a sealed cavity;
the rotor supporting mechanism (2) comprises an upper bearing (201), a lower bearing (202) and a magnetic suspension module (203);
the upper bearing (201) is installed on the upper end cover (103), the upper bearing (201) is connected with the flywheel rotor (101) through a rotating shaft, the lower bearing (202) is installed on the lower end cover (104), and the lower bearing (202) is connected with the flywheel rotor (101) through the rotating shaft of the flywheel motor (3).
2. A modular magnetically levitated flywheel battery energy storage system as claimed in claim 1 wherein: the flywheel motor (3) is a permanent magnet synchronous motor, and a rotating shaft of the flywheel motor (3) is connected with a rotating shaft of the flywheel rotor (101) through a spline.
3. A modular magnetically levitated flywheel battery energy storage system as claimed in claim 1 wherein: the magnetic suspension modules (203) are arranged in a plurality, and the magnetic suspension modules (203) are arranged on the upper end cover (103) in a circular array;
the magnetic suspension module (203) is mounted on the upper end cover (103) through a mounting seat (204), and the mounting seat (204) is connected with the upper end cover (103) through bolts.
4. A modular magnetically levitated flywheel battery energy storage system as claimed in claim 3 wherein: the flywheel rotor comprises an upper end cover (103) and a lower end cover (104), wherein pressure sensors (5) are arranged at positions, corresponding to the upper bearing (201) and the lower bearing (202), on the upper end cover and the lower end cover, respectively, and the pressure sensors (5) are used for monitoring the axial pressure on the upper bearing (201) and the lower bearing (202) under the axial electromagnetic tension of the magnetic suspension module (203) in the running process of the flywheel rotor (101) in real time.
5. A modular magnetically levitated flywheel battery energy storage system as claimed in claim 4 wherein: the controller (4) is mounted on the upper end cover (103) through bolts, and the magnetic suspension module (203) and the pressure sensor (5) are connected with the controller (4).
6. A modular magnetically levitated flywheel battery energy storage system as claimed in claim 1 wherein: the bottom of the flywheel mechanism (1) is provided with a supporting base (6).
7. A method of controlling a modular magnetically levitated flywheel battery energy storage system as claimed in any one of claims 1 to 6 comprising the steps of:
a: before the flywheel mechanism (1) works, air in a rotor cavity (105) formed among the flywheel shell (102), the upper end cover (103) and the lower end cover (104) is pumped by a vacuum pump, so that the rotor cavity (105) is in a vacuum state;
b: when the flywheel mechanism (1) works, one group of the magnetic suspension modules (203) is electrified, the rest magnetic suspension modules (203) are standby, and the electrified current of the magnetic suspension modules (203) is regulated by the controller (4), so that the magnetic suspension modules (203) generate electromagnetic pulling force equivalent to the gravity of the flywheel rotor (101), the flywheel rotor (101) is in a suspension state in the rotor accommodating cavity (105), and when the electrified magnetic suspension modules (203) fail, the controller (4) automatically switches to the backup magnetic suspension modules (203) to realize normal conversion operation of the flywheel rotor (101);
c: in a charging mode, the flywheel motor (3) drives the flywheel rotor (101) to rotate, and when the rotating speed of the flywheel rotor (101) reaches a rated rotating speed, the flywheel rotor (101) continuously rotates at a constant rotating speed in a vacuum environment of the rotor accommodating cavity (105);
d: in the running process of the flywheel rotor (101), the pressure sensor (5) can monitor the axial pressure of the upper bearing (201) and the lower bearing (202) under the axial electromagnetic tension of the magnetic suspension module (203) in the running process of the flywheel rotor (101) in real time, and transmits the pressure data monitored by the pressure sensor (5) in real time to the controller (4), the controller (4) adjusts the electromagnetic tension of the magnetic suspension module (203) to the flywheel rotor (101) by adjusting the power-on current of the magnetic suspension module (203), and then the controller (4) performs closed-loop control on the flywheel mechanism (1) through the rotor supporting mechanism (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310219419.5A CN115912667B (en) | 2023-03-09 | 2023-03-09 | Modularized magnetic suspension flywheel battery energy storage system and control method thereof |
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| CN202310219419.5A CN115912667B (en) | 2023-03-09 | 2023-03-09 | Modularized magnetic suspension flywheel battery energy storage system and control method thereof |
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| CN115912667B true CN115912667B (en) | 2023-06-23 |
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