Continuous operation gravity energy storage device coupled with magnetic field force and operation method of continuous operation gravity energy storage device

Abstract

The invention discloses a continuous operation gravity energy storage device coupled with magnetic field force and an operation method.The device comprises a top storage platform, a ground platform, an energy storage box, a steel cable, a continuously variable transmission, a controller and an electromagnetic system, the top storage platform is arranged above the ground platform, and the energy storage box is vertically hung below the continuously variable transmission through the steel cable; an energy storage weight can be loaded in the box, the electromagnets and the permanent magnets at the top of the energy storage box keep homopolar repulsion, and the electromagnets and the permanent magnets at the bottom of the energy storage box form heteropolar attraction; the controller accurately controls the magnetic field acting force in the lifting process of the energy storage box by adjusting the current intensity of the electromagnet and the rotating speed of the continuously variable transmission, kinetic energy sudden change in the acceleration / deceleration stage of the energy storage weight is dynamically compensated through the magnetic field force, and two sets are arranged to achieve continuous power generation. Through cooperative control of electromagnetic force and mechanical transmission, the rapid response capability of the system to power grid demand fluctuation is remarkably enhanced, meanwhile, the mechanical loss of equipment is reduced, and the application scene of the gravity energy storage technology is expanded.

Description

Technical Field

[0001] The present invention belongs to the technical field of long-duration energy storage, and particularly relates to a continuously operating gravity energy storage device coupled with magnetic force and an operating method thereof. Background Art

[0002] In the process of the global energy accelerating towards cleaner and lower-carbon transformation, the problem of grid stability brought about by the large-scale grid connection of renewable energy is becoming increasingly prominent. The intermittent and fluctuating characteristics of new energy sources such as wind power and photovoltaic power make the power system face a severe challenge of real-time balance between supply and demand, and the gradual withdrawal of traditional thermal power units further weakens the flexible regulation ability of the grid. Against this background, energy storage technology has become a key hub for solving the problem of new energy consumption and building a new power system. Its core value lies in realizing the space-time translation and flexible scheduling of energy, providing diversified services such as frequency regulation and peak shaving and valley filling for the grid, and ensuring a smooth transition of the energy transformation. Among many energy storage technology routes, gravity energy storage stands out with its inherent safety and environmental friendliness. Different from lithium-ion batteries that rely on chemical reactions, gravity energy storage, as a mechanical energy storage method, fundamentally avoids the risks of thermal runaway, resource constraints, and retirement and recycling problems of battery systems. In addition, its energy storage medium can use cheap materials such as waste slag and concrete blocks, which not only realizes resource recycling but also greatly reduces the carbon emissions throughout the life cycle. In terms of system design, gravity energy storage shows significant scalability. It can rely on abandoned mines to build underground vertical energy storage systems or can be flexibly deployed on the ground through modular concrete block stacking, breaking through the strict dependence of pumped-storage energy storage on geographical conditions. In terms of grid service capabilities, gravity energy storage has a second-level response speed and high cycle efficiency, and can accurately participate in grid frequency regulation. With the integration and innovation of digital control technology, intelligent gravity energy storage systems are continuously improving their energy conversion efficiency and economy by real-time optimizing charge and discharge strategies.

[0003] A typical gravity energy storage device relies on the vertical lifting of heavy objects (such as concrete blocks and water heavy objects) to store and release energy. However, during the acceleration and deceleration of the heavy object, the change in its speed will cause a large fluctuation in the output power of the gravity energy storage body, thus generating different degrees of grid connection power impact on the grid-connected system and affecting the power quality of the discharge process. In addition, its energy release power is limited by the movement speed of the heavy object at the beginning and end, and it is difficult to quickly respond to power demand fluctuations. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a long-duration energy storage device that uses magnetic force to assist a typical single-object gravity energy storage and an operating method thereof, which is used to improve the quality of the electric energy released by the energy storage system during the acceleration and deceleration stages of the movement of the energy storage heavy object.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a continuously operating gravity energy storage device coupled with magnetic field force, including a continuously variable transmission, a controller, energy storage heavy objects, a top storage platform, a steel cable, an energy storage box, a ground platform, a generator and a motor. The top storage platform is located above the ground platform, and the energy storage heavy objects are arranged on the top storage platform. There is a space in the energy storage box for accommodating the energy storage heavy objects; the steel cable is arranged vertically, and the generator and the motor are connected to the upper end of the steel cable through a continuously variable transmission. The lower end of the steel cable is connected to the energy storage box. The top surface and the bottom surface of the energy storage box are respectively provided with a first permanent magnet and a second permanent magnet. A first electromagnet with the same pole as the first permanent magnet is arranged directly above the first permanent magnet, and a second electromagnet with the opposite pole to the second permanent magnet is arranged directly below the second permanent magnet; the control signal output end of the controller is connected to the control signal input end of the continuously variable transmission; two sets of steel cables and energy storage boxes are provided.

[0006] Furthermore, it further includes an energy storage device top plate and an energy storage device bottom plate. The energy storage device top plate is located directly above the energy storage device bottom plate. The second electromagnet is arranged on the upper surface of the energy storage device bottom plate, and the electromagnet is arranged on the lower surface of the energy storage device top plate. The continuously variable transmission, the generator and the motor are arranged on the energy storage device top plate.

[0007] Furthermore, rollers are arranged at the bottom of the energy storage heavy objects, and tracks adapted to the rollers are arranged at the bottom of the energy storage box. Both sides of the energy storage box are import and export.

[0008] Furthermore, the first electromagnet and the second electromagnet are electromagnet structures arranged in a Halbach array on the surface, and the magnetic field intensities of the first electromagnet and the second electromagnet can be controlled in real time by the controller. The first permanent magnet and the second permanent magnet are magnet structures with strong magnetic field intensities formed by embedding permanent magnets in a Halbach array on the surface.

[0009] Furthermore, a transmission chain formed by a steel cable winch, a clutch device, a small gear and a large gear along the transmission direction is also provided. The steel cable is connected to the continuously variable transmission through the transmission chain; the number of teeth of the large gear is more than that of the small gear, and the control signal output end of the controller is connected to the control signal input end of the clutch device.

[0010] Furthermore, an internal energy storage system is provided to supply electric energy to the motor, the first electromagnet and the second electromagnet. The electric energy input end of the internal energy storage system is connected to the electric energy output end of a renewable energy power generation or a traditional power plant.

[0011] The present invention also provides an operation method for the above continuously operating gravity energy storage device coupled with magnetic field force, including the following steps: During the acceleration process in the energy release stage, first, the first electromagnet is energized. The repulsive force between the like-pole magnetic fields of the first electromagnet and the first permanent magnet increases the traction force applied to the cable during the acceleration stage, rapidly boosting the output power of the energy to the set value. The controller controls the magnetic force of the first electromagnet in real time to keep the output power of the energy constant. The controller controls the output speed of the continuously variable transmission in real time so that the generator generates electricity at a constant speed. During the uniform-speed process in the energy release stage, the current of the first electromagnet is cut off, and the generator generates electricity at a constant speed. During the deceleration process in the energy release stage, the second electromagnet is energized. The attractive force between the opposite-pole magnetic fields of the second permanent magnet and the second electromagnet increases the traction force applied to the cable during the deceleration stage, and the controller controls the magnetic force of the second electromagnet in real time to keep the output power of the energy constant. The controller controls the output speed of the continuously variable transmission to make the generator generate electricity at a constant speed. Finally, when the speed of the energy storage weight drops to 0, the current of the second electromagnet is cut off, and the energy release stage ends. During the energy storage stage, the currents of the first electromagnet and the second electromagnet are cut off. The motor is driven by renewable energy power generation or the surplus power of traditional energy to transport several energy storage weights to the top storage platform, completing the conversion of electrical energy into gravitational potential energy. The two groups of energy storage boxes store and release energy alternately. When one group releases energy, the motor drives the other group of energy storage boxes upward to prepare for the next energy release stage.

[0012] Furthermore, the controller controls the continuously variable transmission. Under the control of the continuously variable transmission, the generator always maintains the same speed.

[0013] Furthermore, the cable winches all transmit power to the small gears through the clutch device. The small gears transmit power to the large gears, and the large gears transmit power to the generator through the continuously variable transmission.

[0014] Furthermore, the internal energy storage system is stored with energy through renewable energy power generation or the surplus power of traditional energy.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: By means of the adjustable magnetic field force received by the energy storage weight during the acceleration and deceleration stages of energy release, the quality of the electrical energy released by the gravitational internal energy storage system during the acceleration and deceleration stages of the movement of the energy storage weight is improved, and the ability of the gravitational energy storage device to quickly respond to power demand fluctuations is enhanced. The structure and principle of the energy storage device described in this application are simple, the cost is low, the site selection is flexible, the application scenarios are wide, and it is easy to implement in engineering.

[0016] In the energy release stage, the traction force of the steel cable is dynamically adjusted through the repulsion of the same poles or attraction of the opposite poles between the electromagnet and the permanent magnet, so as to realize the active control of the acceleration and deceleration process of the energy storage weight. By adjusting the electromagnetic field strength in real time, the energy output power can quickly reach and stabilize at the target value. The linkage design of the continuously variable transmission and the generator enables the generator to maintain a constant speed in different stages of the movement of the weight, ensuring the stability of the frequency and voltage of the power output, directly meeting the power grid or industrial power demand. The two groups of energy storage boxes achieve nearly continuous power output by alternately releasing and storing energy, reducing the intermittent energy loss of traditional gravity internal energy storage systems; the energy storage stage adopts a standardized path of electric drive to lift heavy objects, and the energy release stage uses magnetic assisted traction to enhance the efficiency of gravitational potential energy release, forming a low-loss closed-loop energy cycle.

[0017] The controller combines electromagnetic field strength regulation with mechanical speed control to dynamically offset load fluctuations and external interference, allowing the output power to remain highly stable throughout the entire movement of the heavy object, avoiding impact on the power grid; the electromagnetic system adopts a redundant design and independent power supply architecture, which can maintain basic functions even when local components fail, ensuring that the system continues to operate in emergency situations.

[0018] The energy storage stage is compatible with renewable energy and traditional surplus power input, and cooperates with the instantaneous energy supply of the internal energy storage system. The energy release stage can flexibly respond to the grid frequency regulation, peak regulation or emergency backup power needs, and realize the "source-grid-load" multi-scenario coordination; the phase difference working mode of the dual energy storage boxes gives the system the ability to quickly switch the charging and discharging state, and can respond to the sudden power fluctuation needs of the power system within seconds. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic axonometric diagram of a gravity energy storage device coupled with magnetic energy storage provided by the present invention.

[0020] Figure 2 A front view schematic diagram of a gravity energy storage device coupled with magnetic energy storage provided by the present invention.

[0021] Figure 3 A schematic top view of a gravity energy storage device coupled with magnetic energy storage provided by the present invention.

[0022] Figure 4 A schematic side view of a gravity energy storage device coupled with magnetic energy storage provided by the present invention.

[0023] Figure 5 Schematic diagram of the forces acting on the energy storage object.

[0024] In the attached drawings, 1 - continuously variable transmission, 2 - controller, 3 - energy storage device top plate, 4 - energy storage weight, 5 - top storage platform, 6 - steel cable, 601 - first steel cable, 602 - second steel cable, 7 - energy storage box, 701 - first energy storage box, 702 - second energy storage box, 8 - generator, 9 - ground platform, 10 - energy storage device bottom plate, 11 - roller, 12 - internal energy storage system, 13 - clutch device, 131 - first clutch device, 132 - second clutch device, 14 - large gear, 15 - small gear, 16 - steel cable winch, 17 - first electromagnet, 18 - second electromagnet, 19 - first permanent magnet, 20 - second permanent magnet. Detailed implementation manners

[0025] The implementation manners of the present invention will be described in detail below with reference to the attached drawings and embodiments.

[0026] Due to the certain physical inertia of the energy storage medium in the gravity energy storage technology, during the process from the stationary state to the uniform motion state and from the uniform motion state back to the stationary state, both the acceleration and deceleration processes need to be experienced. During the process of the gravity block descending to release energy, when the gravity block descends from position 1 to position 2, the output work of the gravity energy storage body W dis can be expressed as: (1) Then, during the process of the gravity block descending from position 1 to position 2, the output power of the gravity energy storage body P dis can be expressed as: (2) The two terms on the right side of equation (2) respectively represent the work power of gravity and the kinetic energy power. If the acceleration a of the energy storage block during this process is introduced, equation (2) can be further expressed as: (3) It should be noted that a in equation (3) is a scalar in the present invention, representing the magnitude of the acceleration of the gravity block. According to the above analysis, referring to Figure 5 , during the process of storing or releasing energy, the storage or output power of the gravity energy storage body can be expressed as the product of the traction force F d and the speed v , that is: (4) During the process of releasing energy, the traction force F d is expressed as: (5) During the process of storing energy, the traction force F d is expressed as: (6) During the acceleration and deceleration of the gravity block, the change in its speed will cause large fluctuations in the storage and output power of the gravity energy storage body, resulting in grid-connected power shocks of varying degrees in the grid-connected system and affecting the power quality of the charging and discharging process. To alleviate the above problems, the present invention proposes to additionally apply a magnetic force to the gravity energy storage body. According to Coulomb's law of magnetic charges, the magnetic force F mag between permanent magnets r is inversely proportional to the square of the distance (7) In formula (7), q m1 and q m2 are the point magnetic charges on the surfaces of magnet 1 and magnet 2 respectively, with the unit of Wb; K is the proportionality coefficient; r is the distance between the two permanent magnets, with the unit of m.

[0027] By reasonably arranging the positions of the four magnets, the energy storage block can be subjected to an adjustable magnetic force during the acceleration and deceleration stages of releasing energy. By introducing the assistance of magnetic force, during the acceleration stage of the energy release process, through the repulsive force of the like-pole magnetic fields of the first electromagnet 17 and the first permanent magnet 19, the traction force applied to the steel cable can be increased when the moving speed of the energy storage heavy object is small, so as to quickly increase the output power of the internal energy storage system, and the traction force is reduced while the speed increases F d , so as to achieve the relative stability of the output power during the acceleration stage; during the deceleration stage of the energy release process, the traction force applied to the steel cable during the deceleration stage is increased through the attractive force of the opposite-pole magnetic fields of the second permanent magnet 20 and the second electromagnet 18 F d , and this traction force increases as the speed decreases, so that the output power of the energy slowly drops to zero; in addition, the auxiliary permanent magnets can be added to the sides and around the energy storage block to reduce the movement yaw friction.

[0028] Refer to Figure 1 and Figure 2, the present invention can provide a continuously operating gravity energy storage device coupled with magnetic field force, including a stepless speed variator 1, a controller 2, an energy storage device top plate 3, energy storage weights 4, a top storage platform 5, a steel cable 6, an energy storage box 7, a generator 8, a motor, a ground platform 9, an energy storage device bottom plate 10, rollers 11 installed at the bottom of the energy storage weights, an internal energy storage system 12, a clutch device 13, a large gear 14, a small gear 15, a steel cable winch 16, a first electromagnet 17 on the lower surface of the top storage platform, a first permanent magnet 19 on the upper surface of the energy storage box, a second permanent magnet 20 on the lower surface of the energy storage box, and a second electromagnet 18 on the upper surface of the energy storage device bottom plate 10. The steel cable 6 is arranged vertically. The upper end of the steel cable 6 is connected to the stepless speed variator 1. The stepless speed variator 1 uses a transmission belt and a driving and driven wheel with variable working diameters to cooperate to transmit power, and can realize continuous change of the transmission ratio. The lower end of the steel cable 6 is connected to the energy storage box 7; the steel cable 6 is used to tow the energy storage box 7 to move up and down; the energy storage weights 4 are symmetrically arranged on the top storage platform 5 with respect to the steel cable 6. The first electromagnet 17 is arranged directly above the second electromagnet 18. The first electromagnet 17 is connected to the energy storage device top plate 3, and the second electromagnet 18 is arranged on the energy storage device bottom plate 10; a first permanent magnet 19 is arranged on the upper surface of the energy storage box 7, and a second permanent magnet 20 is arranged on the lower surface of the energy storage box 7. The first permanent magnet 19 faces the first electromagnet 17 directly above, and the second permanent magnet 20 faces the second electromagnet 18 directly below. The internal energy storage system 12, the clutch device 13, the large gear 14, the small gear 15, and the steel cable winch 16 are arranged on the energy storage device top plate 3. The control signal output end of the controller 2 is connected to the control signal input end of the stepless speed variator 1, the control signal input end of the internal energy storage system 12, and the control signal input ends of the first clutch device 131 and the second clutch device 132; the electric energy input end of the internal energy storage system 12 is connected to the electric energy output end of a renewable energy power generation or a traditional power plant, and the electric energy output end of the internal energy storage system 12 is connected to the electric energy input end of the generator 8.

[0029] As an optimized implementation manner, the generator 8 and the motor use the same device, including two working conditions, namely the generator and the motor. It acts as a generator in the power generation working condition and as a motor when driving other mechanisms.

[0030] The driving end of the stepless speed variator 1 is connected to the shaft of the large gear 14, and the driven end of the stepless speed variator 1 is connected to the generator 8. The stepless speed variator 1 is used to transmit the power transferred from the energy storage weights to the steel cable 6 to the generator 8 and make it reach the corresponding speed. During the energy release process, the energy storage weights first accelerate, then move at a constant speed, and finally decelerate. The stepless speed variator 1, under the control of the controller 2, keeps the rotor of the generator 8 at a constant speed all the time.

[0031] Refer to Figure 2 and Figure 3, there are two sets of the energy storage boxes 7 and steel cables in this application, namely the first steel cable 601 and the second steel cable 602, the first energy storage box 701 and the second energy storage box 702. The upper ends of the first steel cable 601 and the second steel cable 602 are each connected to a steel cable winch 16. Each steel cable winch 16 transmits power to the pinion 15 through the first clutch device 131 and the second clutch device 132. The pinion 15 transmits power to the large gear 14. The large gear 14 finally transmits the power to the generator 8 through the continuously variable transmission 1. The lower ends of the first steel cable 601 and the second steel cable 602 are respectively connected to the first energy storage box 701 and the second energy storage box 702. The first permanent magnets 19 are arranged at the tops of the first energy storage box 701 and the second energy storage box 702, and the second permanent magnets 20 are arranged at the bottoms of the first energy storage box 701 and the second energy storage box 702. After the internal energy storage system 12 stores energy, it provides the electric energy required to operate the first electromagnet 17 and the second electromagnet 18, as well as the energy required to lift the empty first energy storage box 701 and the second energy storage box 702.

[0032] During the energy release process, the continuously variable transmission 1 is used to transmit the power of the energy storage heavy object transmitted to the large gear 14 to the generator 8 and make it reach the corresponding speed. The input shaft of the continuously variable transmission 1 is connected to the large gear 14, and the output shaft of the continuously variable transmission 1 is connected to the generator 8. The number of teeth of the large gear 14 is more than that of the pinion 15 to suppress the speed fluctuation of the input shaft of the continuously variable transmission. After the internal energy storage system 12 stores energy, it provides the electric energy required to operate the first electromagnet 17 and the second electromagnet 18, as well as the energy required to lift the empty first energy storage box 701 and the second energy storage box 702. The control signal output end of the controller 2 is connected to the control signal input end of the continuously variable transmission 1, the control signal input end of the internal energy storage system 12, and the control signal input ends of the first clutch device 131 and the second clutch device 132. During the energy release process, the energy storage heavy object 4 first accelerates, then moves at a constant speed, and finally decelerates. By the controller 2, the intensity of the current output by the internal energy storage system 12 to the first electromagnet 17 and the second electromagnet 18 is controlled in real time, and the magnitude of the magnetic force received by the first energy storage box 701 and the second energy storage box 702 is adjusted, so as to maintain the constant output power of the energy storage device. At the same time, by the controller 2, the transmission ratio of the continuously variable transmission 1 is controlled in real time, and the generator 8 can always maintain the same speed. The controller 2 is used to control the magnetic field intensity of the first electromagnet 17 and the second electromagnet 18, as well as the output speed of the continuously variable transmission 1, in real time.

[0033] The top plate 3 of the energy storage device is a plate - shaped structure with a relatively large length and width, used to place the first electromagnet 17; the bottom plate 10 of the energy storage device is a plate - shaped structure with a relatively large length and width, used to place the second electromagnet 18; the energy storage heavy object 4 is the main energy storage carrier of the energy storage device; the top storage platform 5 is used to place the energy storage heavy object 4 with gravitational potential energy; the energy storage box 7 for storing the energy storage heavy object is used to carry the energy storage heavy object 4 for downward or upward movement.

[0034] The rollers 11 installed at the bottom of the energy storage heavy object are for facilitating the loading or unloading of the energy storage heavy object 4 into or out of the energy storage box 7, and for facilitating its movement on the storage platform 5 and the ground platform 9.

[0035] The first electromagnet 17 and the second electromagnet 18 are electromagnet structures arranged in a Halbach array on the surface, and the magnetic field intensities of the first electromagnet 17 and the second electromagnet 18 can be controlled in real - time by the controller 2. The first permanent magnet 19 and the second permanent magnet 20 are magnet structures with strong magnetic field intensities formed by embedding permanent magnets in a Halbach array on the surface. The first electromagnet 17 and the first permanent magnet 19 are like - pole magnets, and the second permanent magnet 20 and the second electromagnet 18 are unlike - pole magnets.

[0036] The present invention also provides an operation method for the above - mentioned continuously - operating gravity energy storage device with coupled magnetic field forces, including the following steps: Release the gravitational potential energy stored in the energy storage box 701. During the acceleration process in the energy - releasing stage, first, energize the first electromagnet 17, and then, through the repulsive force of the like - pole magnetic fields between the first electromagnet 17 and the first permanent magnet 19, increase the traction force applied to the steel cable in the acceleration stage, so as to rapidly increase the output power of the energy to a certain value. Then, the controller 2 controls the magnetic force magnitude of the first electromagnet 17 in real - time to keep the output power of the energy unchanged. At the same time, the controller 2 controls the output speed of the continuously - variable transmission 1 in real - time, so that the generator 8 generates electricity at a constant speed. During the uniform - speed process in the energy - releasing stage, cut off the current of the first electromagnet 17, and the generator 8 generates electricity at a constant speed. During the deceleration process in the energy - releasing stage, energize the second electromagnet 18, and then, through the attractive force of the unlike - pole magnetic fields between the second permanent magnet 20 and the second electromagnet 18, increase the traction force applied to the steel cable in the deceleration stage, and the controller 2 controls the magnetic force magnitude of the second electromagnet 18 in real - time to keep the output power of the energy unchanged. The controller 2 controls the output speed of the continuously - variable transmission 1 in real - time, so that the generator 8 generates electricity at a constant speed. Finally, when the speed of the energy storage heavy object drops to 0, cut off the current of the second electromagnet 18, and the energy - releasing stage of the first energy storage box 701 ends.

[0037] At the moment when the first energy storage box 701 finishes carrying the energy storage heavy object 4 and moving downward to do work, the controller 2 controls to disconnect the first clutch device 131, and at the same time controls the second clutch device 132 to connect the cable winch, and the second energy storage box 702 moves downward to do work. At the same time, the internal energy storage system 12 drives the empty first energy storage box 701 to move upward, and completes the loading of the energy storage heavy object 4 at the top into the first energy storage box 701. By repeating this process, continuous discharge of the gravity energy storage device is achieved.

[0038] During the energy storage stage, the current of the first electromagnet 17 and the second electromagnet 18 is disconnected, and the internal energy storage system 12 is energized through renewable energy power generation or surplus power of traditional energy, and the motor is driven to transport a number of energy storage heavy objects to the top storage platform 5, completing the conversion of electrical energy into gravitational potential energy.

[0039] Although the present invention has been described in detail with general descriptions and specific embodiments above, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A continuously operating gravity energy storage device coupled with magnetic field force, characterized in that, It includes a continuously variable transmission (1), a controller (2), a storage weight (4), a top storage platform (5), a steel cable (6), a storage box (7), a ground platform (9), a generator (8) and a motor. The top storage platform (5) is located above the ground platform (9). The storage weight (4) is arranged on the top storage platform (5). There is a space in the storage box (7) for accommodating the storage weight (4). The steel cable (6) is arranged vertically. The generator (8) and the motor are connected to the upper end of the steel cable (6) through the continuously variable transmission (1). The lower end of the steel cable (6) is connected to the storage box (7). A first permanent magnet (19) and a second permanent magnet (20) are respectively arranged on the top surface and the bottom surface of the storage box (7). A first electromagnet (17) with the same pole as the first permanent magnet (19) is arranged directly above the first permanent magnet (19). A second electromagnet (18) with the opposite pole to the second permanent magnet (20) is arranged directly below the second permanent magnet (20). The control signal output end of the controller (2) is connected to the control signal input end of the continuously variable transmission (1). There are two sets of the steel cable (6) and the storage box (7).

2. The continuous operation gravity energy storage device coupling magnetic field force according to claim 1, wherein It also includes a storage device top plate (3) and a storage device bottom plate (10). The storage device top plate (3) is located directly above the storage device bottom plate (10). The second electromagnet (18) is arranged on the upper surface of the storage device bottom plate (10). The electromagnet is arranged on the lower surface of the storage device top plate (3). The continuously variable transmission (1), the generator (8) and the motor are arranged on the storage device top plate (3).

3. A continuous operation gravity energy storage device coupling magnetic field force according to claim 1, characterized in that, Rollers (11) are arranged at the bottom of the storage weight (4). Tracks adapted to the rollers (11) are arranged at the bottom of the storage box (7). There are inlets and outlets on both sides of the storage box (7).

4. A continuous operation gravity energy storage device coupling magnetic field force according to claim 1, characterized in that, The first electromagnet (17) and the second electromagnet (18) are electromagnet structures arranged in a Halbach array on the surface, and the magnetic field intensities of the first electromagnet (17) and the second electromagnet (18) can be controlled in real time by the controller (2). The first permanent magnet (19) and the second permanent magnet (20) are magnet structures with strong magnetic field intensities formed by embedding permanent magnets in a Halbach array on the surface.

5. A continuously operating gravity energy storage device coupled with magnetic field force according to claim 1, characterized in that, A transmission chain formed by a steel cable winch (16), a clutch device (13), a small gear (15) and a large gear (14) along the transmission direction is also arranged. The steel cable (6) is connected to the continuously variable transmission (1) through the transmission chain. The number of teeth of the large gear (14) is more than that of the small gear (15). The control signal output end of the controller (2) is connected to the control signal input end of the clutch device (13).

6. A continuous operation gravity energy storage device coupling magnetic field force according to claim 1, characterized in that, An internal energy storage system (12) is provided to supply electrical energy to the motor, the first electromagnet (17) and the second electromagnet (18). The electrical energy input end of the internal energy storage system (12) is connected to the electrical energy output end of a renewable energy power generation or a traditional power plant.

7. The operating method of a continuously operating gravity energy storage device coupling magnetic field force according to any one of claims 1-6, characterized in that, It includes the following steps: During the acceleration process in the energy release stage, first, the first electromagnet (17) is energized. The repulsive force between the like-pole magnetic fields of the first electromagnet (17) and the first permanent magnet (19) increases the traction force applied to the cable in the acceleration stage, enabling the output power of the energy to quickly increase to the set value. The controller (2) controls the magnetic force of the first electromagnet (17) in real time to keep the output power of the energy constant; the controller (2) controls the output speed of the continuously variable transmission (1) in real time, enabling the generator (8) to generate electricity at a constant speed; during the uniform speed process in the energy release stage, the current of the first electromagnet (17) is disconnected, and the generator (8) generates electricity at a constant speed; during the deceleration process in the energy release stage, the second electromagnet (18) is energized. The attractive force between the opposite-pole magnetic fields of the second permanent magnet (20) and the second electromagnet (18) increases the traction force applied to the cable in the deceleration stage, and the controller (2) controls the magnetic force of the second electromagnet (18) in real time to keep the output power of the energy constant; The controller (2) controls the output speed of the continuously variable transmission (1) in real time, enabling the generator (8) to generate electricity at a constant speed. Finally, when the speed of the energy storage weight drops to 0, the current of the second electromagnet (18) is disconnected, and the energy release stage ends; In the energy storage stage, the currents of the first electromagnet (17) and the second electromagnet (18) are disconnected. The motor is driven by renewable energy power generation or the excess power of traditional energy to transport several energy storage weights (4) to the top storage platform (5), completing the conversion of electrical energy into gravitational potential energy; The two groups of energy storage boxes (7) store and release energy alternately. When one group releases energy, the motor drives the other group of energy storage boxes (7) to move upward, preparing to enter the next energy release stage.

8. The operating method according to claim 7, characterized in that, The controller (2) controls the continuously variable transmission (1). Under the control of the continuously variable transmission (1), the generator (8) always maintains the same speed.

9. The operating method according to claim 7, characterized in that, The cable winch (16) transmits power to the pinion (15) through the clutch device (13). The pinion (15) transmits power to the large gear (14), and the large gear (14) transmits power to the generator (8) through the continuously variable transmission (1).

10. The operating method according to claim 7, characterized in that, The internal energy storage system (12) is charged with renewable energy power generation or the excess power of traditional energy.

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