A moving magnet type direct drive gravity energy storage device

Abstract

The utility model discloses a kind of direct-drive gravity energy storage devices of moving magnet, belong to gravity energy storage technical field, comprising: direct-drive conveying system and energy storage unit;Direct-drive conveying system includes alternating current network, energy storage converter, direct-drive motor unit and several secondary mover carriers, energy storage converter one end is electrically connected with alternating current network, and the other end is electrically connected with direct-drive motor unit through direct current bus;The device is through direct-drive conveying system and energy storage unit and carries out efficient bidirectional conversion to electric energy and potential energy, realizes multiple movers simultaneous movement, improves the space efficiency ratio of gravity energy storage;And compared with traditional energy storage mode, remove the superfluous movement intermediate mechanism, reduce unnecessary parts and connection, effectively save installation space, reduce maintenance difficulty and cost, so that it can be applied in more extensive site conditions.

Description

Technical Field

[0001] This utility model relates to the field of gravity energy storage technology, specifically to a moving magnet direct-drive gravity energy storage device. Background Technology

[0002] Gravity energy storage is an energy storage technology based on physical and mechanical principles. Its core idea is to store electrical energy by lifting a heavy object and then releasing the energy to generate electricity as the object descends. This technology has received widespread attention in recent years, mainly due to its potential advantages in terms of the entire life cycle, long-term energy storage, safety, environmental friendliness, site selection, and economy.

[0003] Chinese patent CN118353175A discloses a gravity energy storage system with grid-like capabilities. It utilizes the weight and height difference of a heavy object to achieve the mutual conversion of potential energy and mechanical energy, enabling it to provide energy not only when grid demand is high but also to store energy when grid demand is low or nonexistent. However, the energy storage unit of this gravity energy storage system comprises several units consisting of heavy blocks, gravity turbines, electrically excited synchronous motors, and bidirectional converters. Its structure is complex, occupies a large area, and only one heavy block or object can be operated at a time during lifting and lowering, resulting in low energy storage and power generation efficiency, high maintenance requirements, and high costs.

[0004] Therefore, there is an urgent need for a moving magnet direct-drive gravity energy storage device that can achieve the simultaneous independent control and operation of multiple movers through the moving magnet direct drive method, so that a single linear motor direct-drive energy storage system can simultaneously transport multiple energy storage blocks. Utility Model Content

[0005] The purpose of this invention is to provide a moving magnetic direct-drive gravity energy storage device to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A moving-magnet direct-drive gravity energy storage device includes:

[0008] Direct-drive delivery system and energy storage unit;

[0009] The direct-drive transmission system includes an AC power grid, an energy storage converter, a direct-drive motor unit, and several secondary moving vehicles. One end of the energy storage converter is electrically connected to the AC power grid, and the other end is electrically connected to the direct-drive motor unit through a DC bus.

[0010] The direct drive motor unit includes several sets of inverter drivers, and each set of inverter drivers is respectively provided with several primary coil groups;

[0011] The energy storage unit includes several bottom storage areas, several top storage areas, and a transfer mechanism. Several energy storage blocks are arranged in the several bottom storage areas and several top storage areas. The transfer mechanism is used to transfer the energy storage blocks in the storage areas to the secondary moving vehicle, or to transfer the energy storage blocks on the secondary moving vehicle to the top storage area or the bottom storage area, so as to preserve the current potential energy of the energy storage blocks.

[0012] The energy storage blocks are transported to several secondary moving parts by a transfer mechanism. The direct drive motor unit drives the several secondary moving parts and causes the energy storage blocks to move longitudinally, thereby realizing the conversion of energy from the energy storage blocks.

[0013] The moving-magnetic direct-drive gravity energy storage device according to this scheme has at least the following technical advantages:

[0014] This moving-magnetic direct-drive gravity energy storage device achieves efficient bidirectional conversion between electrical energy and potential energy through a direct-drive transmission system and energy storage units. During energy storage, AC grid power is converted into the potential energy of the energy storage block via an energy storage converter and a direct-drive motor unit. During power generation, the potential energy is converted back into electrical energy and fed back to the grid, reducing energy loss in intermediate conversion stages. Furthermore, it can reduce or avoid speed limitations imposed by the charging and power generation mechanisms, greatly improving the charging and power generation power of a single energy storage block and meeting the needs for rapid, high-power energy storage and release.

[0015] This moving-magnetic direct-drive gravity energy storage device can achieve the simultaneous movement of multiple movers through several secondary mover carriers and corresponding primary coil groups, which greatly improves the spatial efficiency ratio of gravity energy storage. This allows the system to store and convert more energy within a limited unit space and time. Furthermore, several energy storage blocks can perform energy storage and power generation operations simultaneously or in batches. The system can be flexibly adjusted according to actual power consumption and energy storage needs, thus improving the overall operating efficiency and flexibility of the device.

[0016] Compared to traditional energy storage blocks' methods for suppressing charging and power generation fluctuations, this moving-magnet direct-drive gravity energy storage device eliminates unnecessary intermediate moving mechanisms. The moving-magnet direct-drive method allows for a more rational combination and layout of the direct-drive delivery system and energy storage unit, resulting in a simpler structure. It reduces unnecessary components and connections, effectively saving installation space and lowering maintenance difficulty and costs, enabling its application in a wider range of site conditions.

[0017] As a further embodiment of this utility model: the direct drive motor unit further includes a charging and generating primary winding track and a return primary winding track. The top and bottom of the charging and generating primary winding track and the return primary winding track are respectively provided with connecting modules, and several secondary moving parts are respectively arranged on the charging and generating primary winding track and the return primary winding track.

[0018] Since the direct-drive motor unit also includes charging and generating primary winding tracks and return primary winding tracks, connection modules are respectively installed at the top and bottom of the charging and generating primary winding tracks and the return primary winding tracks. Several secondary moving vehicles are respectively installed on the charging and generating primary winding tracks and the return primary winding tracks. The charging and generating primary winding tracks are used for the longitudinal transport of the secondary moving vehicles carrying energy storage blocks and are the main areas for charging and generating electricity. When the secondary moving vehicles carry energy storage blocks longitudinally upward, the secondary moving vehicles consume electrical energy from the AC grid and convert it into mechanical energy of the secondary moving vehicles and energy storage blocks until they are lifted to the designated drop and stop. At this time, all electrical energy is converted into mechanical energy of the secondary moving vehicles and energy storage blocks. The potential energy and kinetic energy are 0. When the secondary mover carrying the energy storage block descends longitudinally, the secondary mover will undergo electromagnetic induction with the primary winding track of the charging and generating circuit, and generate an induced current in the primary winding. This induced current can be converted into DC current through several sets of inverter drivers and fed to the DC bus. The DC current on the DC bus is then converted in reverse by the energy storage converter, thereby completing the grid feeding and achieving the power generation effect. This realizes the conversion of the mechanical energy shared by the secondary mover and the energy storage block into electrical energy on the AC grid, until the longitudinal descent reaches the designated drop and stops. At this point, all the mechanical energy shared by the secondary mover and the energy storage block is converted into electrical energy, completing a single power generation operation.

[0019] During energy storage, the direct-drive motor unit efficiently converts electrical energy into the potential energy of the secondary mover and energy storage block, reducing energy loss during the conversion process. Compared to some traditional energy storage methods, this direct conversion of electrical energy into gravitational potential energy is more direct and improves energy storage efficiency. During power generation, the secondary mover interacts with the primary winding rails of the charging and generating circuits via electromagnetic induction to generate an induced current. This induced current is then efficiently converted into AC power by the inverter driver and energy storage converter, ensuring efficient energy recovery and reuse. This device achieves bidirectional conversion between electrical and mechanical energy, storing excess electrical energy and releasing it during peak demand periods, thus regulating the power grid's supply and demand balance and improving grid stability and reliability.

[0020] In addition, the docking module and the return primary winding track are responsible for providing the driving force required for the periodic cyclical motion of the secondary mover vehicle, which is used to realize the horizontal docking of the secondary mover vehicle between the charging and generating primary winding track and the return primary winding track, so that the entire gravity energy storage device can form a continuous working cycle. After the secondary mover vehicle completes one charging and generating process on the charging and generating primary winding track, it can be quickly transferred to the return primary winding track through the docking module to return to the initial position, and then put into the next round of charging and generating operations, which greatly improves the working efficiency and energy conversion frequency of the energy storage device.

[0021] As a further embodiment of this utility model: the charging and generating primary winding track includes a mounting frame, a primary winding assembly is provided on the top of the mounting frame, and moving guides are provided on both sides of the mounting frame along the length of the charging and generating primary winding track.

[0022] As a further embodiment of this utility model: a plurality of sensors are provided between the mounting bracket and the primary coil group, and the plurality of sensors are electrically connected to the inverter driver respectively.

[0023] As a further embodiment of this utility model, the inverter driver includes several charging and generating inverter driving units and several return inverter driving units.

[0024] The charging and generating primary winding track includes a mounting frame, with a primary winding assembly mounted on top of the mounting frame. Moving element guides are installed on both sides of the mounting frame and along the length of the charging and generating primary winding track. Several sensors are installed between the mounting frame and the primary coil assembly, and these sensors are electrically connected to the inverter driver. Several primary winding assemblies are evenly fixed to the charging and generating primary winding track. After energization, a traveling wave electromagnetic force is generated between the charging and generating primary winding track and the secondary moving element, thereby driving and controlling the secondary moving element to generate traveling wave motion. The moving element guides provide the secondary moving element with the degrees of freedom required for traveling wave motion, ensuring that the secondary moving element can and can only move along the guide rail direction. Simultaneously, multiple sensors are installed at intervals between the primary winding assemblies on the charging and generating primary winding mounting frame. These sensors are electrically connected to the inverter driver wires. The inverter driver includes several charging and generating inverter drive units and several return inverter drive units. Through the sensors, the current position, speed, acceleration, and other information of the secondary moving vehicle can be accurately measured and transmitted to the inverter drive unit in real time. The inverter drive unit can then make corresponding judgments based on the instructions, realizing precise control of the motion state of the secondary moving vehicle. It can also accurately drive and position the secondary moving vehicle according to actual needs, ensuring that the secondary moving vehicle accurately reaches the designated drop point and improving the accuracy of energy conversion.

[0025] As a further embodiment of this utility model: the connection module includes a horizontal motion component and a primary winding track in the connection area. The primary winding track for charging and generating electricity and the primary winding track for returning electricity are connected through the horizontal motion component. The primary winding track in the connection area is connected to the primary winding track for charging and generating electricity.

[0026] As a further embodiment of this utility model: the charging and generating inverter drive unit and the return inverter drive unit are electrically connected to the charging and generating primary winding rail, the return primary winding rail and the connecting area primary winding rail, respectively.

[0027] The connection module includes a horizontal motion component and a primary winding track in the connection area. The primary winding tracks for charging and generating electricity and the primary winding track for returning are connected through the horizontal motion component. The primary winding track in the connection area is connected to the primary winding track for charging and generating electricity. The inverter drive unit for charging and generating electricity and the inverter drive unit for returning electricity are electrically connected to the primary winding tracks for charging and generating electricity, the primary winding track for returning electricity, and the primary winding track in the connection area, respectively. The horizontal motion component enables the secondary motor carrier to be horizontally connected between the primary winding tracks for charging and generating electricity and the primary winding track for returning electricity. The primary winding track in the connection area can also participate in the charging and generating electricity operation of the energy storage block. The length of the primary winding track in the docking area is greater than the length of the secondary mover vehicle to avoid horizontal docking motion interference of the secondary mover vehicle and ensure that the docking module can successfully complete the docking work. In addition, the primary winding track in the return trip is used to provide the electromagnetic component force in the traveling wave direction required by the secondary mover vehicle during the return trip and to provide track constraints, so that the secondary mover vehicle can run stably along the predetermined track during the return trip, ensuring the accuracy and controllability of its motion.

[0028] As a further embodiment of this utility model: the secondary mover carrier includes a mounting base, a secondary magnet, and a travel limiting mechanism. The top of the mounting base is provided with an energy storage block quick-installation mechanism, and the travel limiting mechanism is sleeved inside the mover movement guide.

[0029] The secondary mover carrier includes a mounting base, secondary magnets, and a travel limiting mechanism. The mounting base has a quick-release mechanism for the energy storage block on top, and the travel limiting mechanism is fitted inside the mover movement guide. The secondary magnets provide a stable traveling wave magnetic field to the secondary mover carrier. When the primary winding components on the charging / generating primary winding rail or the return primary winding rail are energized, the stable traveling wave magnetic field interacts with the energized primary winding rail, generating a controllable traveling wave electromagnetic force. This allows the direct-drive delivery system to precisely control the movement of the secondary mover carrier, including speed, acceleration, and direction, meeting the energy storage and power generation needs under different operating conditions. Furthermore, the stable traveling wave magnetic field helps improve the efficiency of electromagnetic force generation, making the conversion between electrical and mechanical energy more efficient. Simultaneously, the traveling wave electromagnetic force can directly drive the secondary mover carrier to move along the traveling wave direction, reducing energy loss during conversion and transfer, and improving the overall energy conversion efficiency of the gravity energy storage system. Attached Figure Description

[0030] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0031] Figure 1 This is a schematic diagram of a moving-magnet direct-drive gravity energy storage device.

[0032] Figure 2 A schematic diagram of the direct-drive delivery system of a moving-magnetic direct-drive gravity energy storage device;

[0033] Figure 3 A schematic diagram of the direct drive motor unit structure of a moving magnet type direct drive gravity energy storage device;

[0034] Figure 4 A schematic diagram of the primary winding track section for charging and generating electricity in a moving-magnetic direct-drive gravity energy storage device.

[0035] Figure 5 A schematic diagram of the secondary mover carrier structure of a moving-magnetic direct-drive gravity energy storage device;

[0036] Figure 6 This is a schematic diagram showing the position and time of each secondary moving vehicle in the power generation mode of a moving magnetic direct-drive gravity energy storage device.

[0037] Figure label:

[0038] 1. Direct-drive transmission system; 11. AC power grid; 12. Energy storage converter; 13. Direct-drive motor unit; 131. Inverter driver; 1311. Charging and generating inverter drive unit; 1312. Return inverter drive unit; 132. Charging and generating primary winding track; 1321. Mounting bracket; 1322. Mover movement guide; 1323. Sensor; 133. Return primary winding track; 134. Connection module; 1341. Horizontal motion component; 1342. Connection area primary winding track; 14. Secondary mover carrier; 141. Mounting base; 142. Secondary magnet; 143. Travel limit mechanism; 144. Energy storage block quick-installation mechanism; 15. Primary coil group; 2. Energy storage unit; 21. Bottom storage area; 22. Top storage area; 23. Transfer mechanism; 24. Energy storage block. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0042] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0045] like Figure 1-5The present invention, as shown in this embodiment, discloses a moving-magnetic direct-drive gravity energy storage device, comprising: a direct-drive conveying system 1 and an energy storage unit 2; the direct-drive conveying system 1 includes an AC power grid 11, an energy storage converter 12, a direct-drive motor unit 13, and several secondary moving parts 14; one end of the energy storage converter 12 is electrically connected to the AC power grid 11, and the other end is electrically connected to the direct-drive motor unit 13 via a DC bus; the direct-drive motor unit 13 includes several sets of inverter drivers 131, each set of inverter drivers 131 corresponding to several primary coil groups 15; the energy storage unit 2 includes several bottom storage areas 21 and several top storage areas. Zone 22 and transfer mechanism 23, several bottom storage zones 21 and several top storage zones 22 are provided with several energy storage blocks 24. The transfer mechanism 23 is used to transfer the energy storage blocks 24 in the storage zone to the secondary mover carrier 14, or to transfer the energy storage blocks 25 on the secondary mover carrier 14 to the top storage zone 21 or bottom storage zone 22, so as to preserve the current potential energy of the energy storage blocks 25. The energy storage blocks 25 are respectively transported to several secondary mover carriers 14 through the transfer mechanism 23. The direct drive motor unit 13 drives several secondary mover carriers 14 and drives several energy storage blocks 25 to move longitudinally, realizing the conversion of energy of the energy storage blocks 24.

[0046] Specifically, this moving-magnetic direct-drive gravity energy storage device achieves efficient bidirectional conversion between electrical energy and potential energy through the direct-drive transmission system 1 and the energy storage unit 2. During energy storage, the electrical energy of the AC grid 11 is converted into the potential energy of the energy storage block 24 through the energy storage converter 12 and the direct-drive motor unit 13. During power generation, the potential energy is converted back into electrical energy and fed back to the grid, reducing energy loss in the intermediate conversion process. Furthermore, it can reduce or avoid the limitation on the movement speed of the charging and generating mechanisms, which can greatly improve the charging and generating power of a single energy storage block 24 and meet the needs of rapid and high-power energy storage and release.

[0047] This moving-magnetic direct-drive gravity energy storage device can achieve the simultaneous movement of multiple movers through several secondary mover carriers 14 and corresponding primary coil groups 15, which greatly improves the space efficiency ratio of gravity energy storage. This allows the system to store and convert more energy within a limited unit space and time. Furthermore, several energy storage blocks 24 can perform energy storage and power generation operations simultaneously or in batches. The system can be flexibly adjusted according to actual power consumption and energy storage needs, thereby improving the overall operating efficiency and flexibility of the device.

[0048] Compared to traditional energy storage blocks, this moving-magnet direct-drive gravity energy storage device eliminates unnecessary intermediate moving mechanisms. The moving-magnet direct-drive method makes the combination layout of the direct-drive transmission system 1 and the energy storage unit 2 more reasonable, the structure is simpler, and unnecessary parts and connections are reduced, effectively saving installation space, reducing maintenance difficulty and cost, and enabling it to be applied in a wider range of site conditions.

[0049] Furthermore, such as Figure 3 As shown, the direct drive motor unit 13 also includes a charging and generating primary winding track 132 and a return primary winding track 133. The top and bottom of the charging and generating primary winding track 132 and the return primary winding track 133 are respectively provided with a connecting module 134, and a number of secondary motor carriers 14 are respectively arranged on the charging and generating primary winding track 132 and the return primary winding track 133.

[0050] Specifically, the direct-drive motor unit 13 also includes a charging and generating primary winding track 132 and a return primary winding track 133. Connecting modules 134 are respectively installed at the top and bottom of the charging and generating primary winding track 132 and the return primary winding track 133. Several secondary moving parts 14 are respectively installed on the charging and generating primary winding track 132 and the return primary winding track 133. The charging and generating primary winding track 132 is used for the longitudinal transport of the secondary moving parts 14 carrying the energy storage block 24 and is the main area for charging and generating electricity. When the secondary moving parts 14 carry the energy storage block 24 longitudinally upwards, the secondary moving parts 14 consume electrical energy from the AC power grid 11 and convert it into mechanical energy for the secondary moving parts 14 and the energy storage block 24 until they are lifted to the designated drop and stop, at which point all electrical energy has been converted. The potential energy of the secondary mover 14 and the energy storage block 24 is 0, and the kinetic energy is 0. When the secondary mover 14 carries the energy storage block 24 vertically downward, the secondary mover 14 will generate electromagnetic induction with the charging and generating primary winding track 132, and generate an induced current in the charging and generating primary winding. The induced current can be converted into DC power through several sets of inverter drivers 131 and fed to the DC bus. The DC power on the DC bus is then converted in reverse through the energy storage converter 12, thereby completing the grid feeding of electrical energy and achieving the power generation effect. The mechanical energy shared by the secondary mover 14 and the energy storage block 24 is converted into electrical energy on the AC grid 11. The vertical descent reaches the designated drop and stops. All the mechanical energy shared by the secondary mover 14 and the energy storage block 24 is converted into electrical energy, completing a single power generation operation.

[0051] During energy storage, the direct-drive motor unit 13 efficiently converts electrical energy into the potential energy of the secondary mover carrier 14 and the energy storage block 24, reducing energy loss during the conversion process. Compared with some traditional energy storage methods, this method of directly converting electrical energy into gravitational potential energy is more direct and improves energy storage efficiency. During power generation, the secondary mover carrier 14 generates an induced current through electromagnetic induction with the charging and generating primary winding rail 132. This induced current is then efficiently converted into AC power for grid feeding via the inverter driver 131 and the energy storage converter 12, ensuring efficient energy recovery and reuse. This device achieves bidirectional conversion between electrical and mechanical energy, storing excess electrical energy and releasing it during peak electricity demand, thus regulating the grid supply and demand balance and improving the stability and reliability of the grid.

[0052] In addition, the connection module 134 and the return primary winding track 133 are responsible for providing the driving force required for the periodic cyclical motion of the secondary mover vehicle 14, so as to realize the horizontal connection of the secondary mover vehicle 14 between the charging and power generation primary winding track 132 and the return primary winding track 133, so that the entire gravity energy storage device can form a continuous working cycle. After the secondary mover vehicle 14 completes one charging and power generation process on the charging and power generation primary winding track 132, it can quickly transfer to the return primary winding track 133 through the connection module 134 to return to the initial position, and then put into the next round of charging and power generation operation, which greatly improves the working efficiency and energy conversion frequency of the energy storage device.

[0053] Furthermore, such as Figure 3 and Figure 4 As shown, the charging and generating primary winding track 132 includes a mounting frame 1321. A primary winding assembly is provided on the top of the mounting frame 1321. Moving guides 1322 are provided on both sides of the mounting frame 1321 and along the length of the charging and generating primary winding track 132. Several sensors 1323 are provided between the mounting frame 1321 and the primary coil group 15. The sensors 1323 are electrically connected to the inverter driver 131. The inverter driver 131 includes several charging and generating inverter drive units 1311 and several return inverter drive units 1312.

[0054] Specifically, the charging and generating primary winding track 132 includes a mounting frame 1321. A primary winding assembly is mounted on the top of the mounting frame 1321. Moving element guides 1322 are provided on both sides of the mounting frame 1321 and along the length of the charging and generating primary winding track 132. Several sensors 1323 are positioned between the mounting frame 1321 and the primary coil assembly 15, and these sensors 1323 are electrically connected to the inverter driver 131. Several primary winding assemblies are evenly fixed to the charging and generating primary winding track 132. When energized, the charging and generating primary winding track 132 generates a traveling wave electromagnetic force with the secondary moving element carrier 14, thereby driving and controlling the secondary moving element carrier 14 to generate traveling wave motion. The moving element guides 1322 provide the secondary moving element carrier 14 with the degrees of freedom required for traveling wave motion, ensuring the secondary moving element... The carrier 14 can only move along the guide rail direction. Meanwhile, multiple sensors 1323 are installed at intervals between the primary winding components on the charging and generating primary winding mounting frame. The sensors 1323 are electrically connected to the inverter driver 131 via wires. The inverter driver 131 includes several charging and generating inverter drive units 1311 and several return inverter drive units 1312. The sensors 1323 can accurately measure the current position, speed, acceleration, and other information of the secondary carrier 14 and transmit it to the inverter drive unit in real time. The inverter drive unit can then make corresponding judgments based on the instructions, thereby achieving precise control of the motion state of the secondary carrier 14. It can also accurately drive and position the secondary carrier 14 according to actual needs, ensuring that the secondary carrier 14 accurately reaches the designated drop point and improving the accuracy of energy conversion.

[0055] Furthermore, such as Figure 3 As shown, the connection module 134 includes a horizontal motion component 1341 and a connection area primary winding track 1342. The charging and generating primary winding track 132 and the return primary winding track 133 are connected through the horizontal motion component 1341. The connection area primary winding track 1342 is connected to the charging and generating primary winding track 132. The charging and generating inverter drive unit 1311 and the return inverter drive unit 1312 are electrically connected to the charging and generating primary winding track 132, the return primary winding track 133 and the connection area primary winding track 1342, respectively.

[0056] Specifically, the connection module 134 includes a horizontal motion component 1341 and a connection area primary winding track 1342. The charging and power generation primary winding track 132 and the return primary winding track 133 are connected through the horizontal motion component 1341. The connection area primary winding track 1342 is connected to the charging and power generation primary winding track 132. The charging and power generation inverter drive unit 1311 and the return inverter drive unit 1312 are electrically connected to the charging and power generation primary winding track 132, the return primary winding track 133, and the connection area primary winding track 1342, respectively. The horizontal motion component 1341 enables the secondary motor carrier 14 to be horizontally connected between the charging and power generation primary winding track 132 and the return primary winding track 133. The connection area primary winding track 1342 can participate in the charging and power generation of the energy storage block 24. The length of the primary winding track 1342 in the docking area is greater than the length of the secondary mover carrier 14, which avoids horizontal docking motion interference of the secondary mover carrier 14 and ensures that the docking module 134 can successfully complete the docking work. In addition, the primary winding track 133 in the return trip is used to provide the electromagnetic component force in the traveling wave direction required by the secondary mover carrier 14 during the return trip and to provide track constraints, so that the secondary mover carrier 14 can run stably along the predetermined track during the return trip, ensuring the accuracy and controllability of its motion.

[0057] Furthermore, such as Figure 5 As shown, the secondary mover carrier 14 includes a mounting base 141, a secondary magnet 142, and a travel limiting mechanism 143. The top of the mounting base 141 is provided with an energy storage block quick-installation mechanism 144, and the travel limiting mechanism 143 is sleeved in the mover movement guide 1322.

[0058] Specifically, the secondary mover carrier 14 includes a mounting base 141, a secondary magnet 142, and a travel limiting mechanism 143. The mounting base 141 has a quick-release energy storage block mechanism 144 on its top, and the travel limiting mechanism 143 is fitted within the mover movement guide 1322. The secondary magnet 142 provides a stable traveling wave magnetic field to the secondary mover carrier 14. When the primary winding assembly on the charging / generating primary winding rail 132 or the return primary winding rail 133 is energized, the stable traveling wave magnetic field interacts with the energized primary winding rail, enabling... The generation of a controllable traveling wave electromagnetic force allows the direct-drive transmission system 1 to precisely control the movement of the secondary mover 14, including its speed, acceleration, and direction, to meet the energy storage and power generation requirements under different operating conditions. Furthermore, the stable traveling wave magnetic field helps to improve the generation efficiency of electromagnetic force, making the conversion between electrical energy and mechanical energy more efficient. At the same time, the traveling wave electromagnetic force can directly drive the secondary mover 14 to move along the traveling wave direction, reducing energy loss during conversion and transfer, and improving the energy conversion efficiency of the entire gravity energy storage system.

[0059] According to embodiments of the present invention, such as Figure 6As shown, the timing of the power generation state of several bottom storage areas and several top storage areas through the direct drive motor unit is the same as that of the energy storage state, only in reverse, so it will not be described again. To simplify the calculation and description, the running time of each segment of the secondary mover is simplified as follows: the top storage area and the bottom storage area are N layers, the secondary mover connection time is t1, the positioning time of the adjacent layer mover is t2, then the positioning time of the Xth layer mover is (N-X+1)×2, the loading and unloading time of the energy storage block is t3, the power generation operation time of the loaded secondary mover is t4, and the return time of the unloaded secondary mover is t5.

[0060] The cycle time of the Xth level moving vehicle can be simplified into the following steps:

[0061] 1. Connection, time t1;

[0062] 2 in place: (N-X+1)×2;

[0063] 3. Loading time: t3;

[0064] 4. Power generation operation: Time taken t4;

[0065] 5. Material unloading: Time taken t3;

[0066] 6. Positioned at the return transfer area, time x×t2;

[0067] 7. Return trip connection: Time taken t1;

[0068] 8. Return motion of unloaded mover: t5;

[0069] Adding up the durations of each of the above steps, we can obtain the motion period T of the secondary mover vehicle:

[0070] T=2×(t1+t3)+(N+1)×t2+t4+t5;

[0071] Let the cycle time of material transport be t, and the total number of secondary moving vehicles required be M, then:

[0072] M = rounddown(T / t), where t can be adjusted according to actual needs.

[0073] Therefore, according to Figure 6As shown, the linear representation is as follows: the continuous line represents the secondary mover carrier in the primary winding track area during charging and power generation, and the dashed line represents the secondary mover carrier in the primary winding track area during return and the primary winding track area during docking. Therefore, it can be clearly understood that, except for the first cycle interval, any longitudinal reference time line can be drawn. When the number of primary movers in each group of the direct drive motor unit is M, the reference time line can guarantee that a maximum of N-1 energy storage blocks are operating simultaneously. Moreover, the time for the movers to run in power generation mode is T, ensuring that the rhythm of the movers during operation remains consistent. That is, by adjusting the rhythm of each segment of the secondary mover carrier, the charging and power generation power of each set of direct drive motor units can always remain consistent in the charging and power generation state, without being affected by the loading and unloading of materials, which can effectively eliminate energy fluctuations.

[0074] During energy storage and power generation, by rationally adjusting the cycle time of each segment of the secondary moving carrier, N-1 energy storage blocks can be guaranteed to operate simultaneously at any given time. This avoids power fluctuations caused by the loading and unloading of individual energy storage blocks, ensuring consistent and stable charging and power generation power, and effectively eliminating energy fluctuations. In the energy storage stage, stable charging power ensures the efficient operation of the energy storage process and avoids energy loss due to power instability. In the power generation stage, stable power generation improves the quality of electrical energy, making the output electrical energy more in line with the requirements of the power grid, reducing damage to power equipment, and improving the reliability and safety of the entire power system.

[0075] Furthermore, with M primary movers operating simultaneously, the device operates at or near full load for most of the time, ensuring that energy storage blocks in the N-1 bottom or top storage areas are always running simultaneously. This avoids idleness and waste, and improves equipment utilization and overall system efficiency.

[0076] In use, the direct drive transmission system 1 is started, and electrical energy flows bidirectionally through the energy storage converter 12 between the AC grid 11 and the DC bus. Several sets of inverter drivers 131 of the direct drive motor unit 13 draw power from the DC bus and independently control several sets of primary coil groups 15. The transfer mechanism 23 of the energy storage unit 2 is started, and the transfer mechanism 23 transports the energy storage block 24 to the corresponding secondary mover carrier 14. The direct drive motor unit 13 drives several secondary mover carriers 14 and drives several energy storage blocks 24 to move longitudinally, realizing the control of the secondary mover carrier 14 to store energy in the vertical direction and generate electricity in the vertical direction.

[0077] In addition, several sets of inverter drivers 131 of the direct drive motor unit 13 control the corresponding primary coil groups 15 to be energized, so that the charging and generating primary winding track 132 generates traveling wave electromagnetic force, which drives the secondary mover carrier 14 equipped with energy storage block 24 to move longitudinally upward along the charging and generating primary winding track 132, converting electrical energy into mechanical energy of the secondary mover carrier 14 and energy storage block 24 until it reaches the designated drop point of the top storage area 22 and stops. At this time, the kinetic energy is 0 and all electrical energy is converted into potential energy, thereby realizing the longitudinal upward energy storage of the secondary mover carrier 14 and energy storage block 24; the transfer mechanism 2 connects the energy storage block 24 of the top storage area 22 with the secondary mover carrier on the charging and generating primary winding track 132. 14. The secondary mover carrier 14, carrying the energy storage block 24, descends longitudinally and undergoes electromagnetic induction with the charging and generating primary winding track 132. An induced current is generated in the charging and generating primary winding. The charging and generating inverter drive unit 1311 converts the induced current into DC power and feeds it to the DC bus. Then, it is converted into AC power and fed to the grid through the energy storage converter 12 until it descends to the designated drop point in the bottom storage area 21 and stops. All mechanical energy is converted into electrical energy, and the single power generation operation ends. This realizes the downward power generation of the secondary mover carrier 14 and the energy storage block 24. Subsequently, the docking module 134 and the return primary winding track 133 drive the secondary mover carrier 14 back to the initial position, ready for the next cycle.

[0078] During the longitudinal upward movement of the secondary mover carrier 14 carrying the energy storage block 24 for energy storage, the primary coil group 15 is energized to generate a traveling wave electromagnetic force, which drives the secondary mover carrier 14 carrying the energy storage block 24 to move longitudinally upward. This efficiently converts electrical energy into mechanical energy of the secondary mover carrier 14 and the energy storage block 24, and ultimately into potential energy. The entire process involves relatively few energy conversion steps, reducing energy loss during conversion and improving energy storage efficiency. During the longitudinal downward movement of the secondary mover carrier 14 for power generation, the secondary mover carrier 14 carries the energy storage block 24 and moves longitudinally downward. It generates an induced current through electromagnetic induction with the charging and generating primary winding track 132. This induced current is then converted into electrical energy by the charging and generating inverter drive unit 1311 and the energy storage converter 12, efficiently converting the stored potential energy back into electrical energy and realizing the recycling of energy.

[0079] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A moving-magnetic direct-drive gravity energy storage device, characterized in that, include: Direct-drive delivery system and energy storage unit; The direct-drive transmission system includes an AC power grid, an energy storage converter, a direct-drive motor unit, and several secondary moving vehicles. One end of the energy storage converter is electrically connected to the AC power grid, and the other end is electrically connected to the direct-drive motor unit through a DC bus. The direct drive motor unit includes several sets of inverter drivers, and each set of inverter drivers is respectively provided with several primary coil groups; The energy storage unit includes several bottom storage areas, several top storage areas, and a transfer mechanism. Several energy storage blocks are arranged in the several bottom storage areas and several top storage areas. The transfer mechanism is used to transfer the energy storage blocks in the storage areas to the secondary moving vehicle, or to transfer the energy storage blocks on the secondary moving vehicle to the top storage area or the bottom storage area, so as to preserve the current potential energy of the energy storage blocks. The energy storage blocks are transported to several secondary moving parts by a transfer mechanism. The direct drive motor unit drives the several secondary moving parts and causes the energy storage blocks to move longitudinally, thereby realizing the conversion of energy from the energy storage blocks.

2. The moving-magnet direct-drive gravity energy storage device according to claim 1, characterized in that, The direct drive motor unit also includes a charging and generating primary winding track and a return primary winding track. The top and bottom of the charging and generating primary winding track and the return primary winding track are respectively provided with a connecting module, and several secondary motor carriers are respectively arranged on the charging and generating primary winding track and the return primary winding track.

3. The moving-magnet direct-drive gravity energy storage device according to claim 2, characterized in that, The charging and generating primary winding track includes a mounting frame, a primary winding assembly is provided on the top of the mounting frame, and moving guides are provided on both sides of the mounting frame along the length of the charging and generating primary winding track.

4. The moving-magnet direct-drive gravity energy storage device according to claim 3, characterized in that, Several sensors are disposed between the mounting bracket and the primary coil group, and each of the sensors is electrically connected to the inverter driver.

5. The moving-magnet direct-drive gravity energy storage device according to claim 4, characterized in that, The inverter driver includes several charging and generating inverter driver units and several return inverter driver units.

6. The moving-magnet direct-drive gravity energy storage device according to claim 5, characterized in that, The connection module includes a horizontal motion component and a primary winding track in the connection area. The primary winding track for charging and generating electricity and the primary winding track for returning electricity are connected through the horizontal motion component. The primary winding track in the connection area is connected to the primary winding track for charging and generating electricity.

7. The moving-magnet direct-drive gravity energy storage device according to claim 6, characterized in that, The charging and generating inverter drive unit and the return inverter drive unit are electrically connected to the charging and generating primary winding rails, the return primary winding rails, and the connecting area primary winding rails, respectively.

8. The moving-magnet direct-drive gravity energy storage device according to claim 7, characterized in that, The secondary mover carrier includes a mounting base, a secondary magnet, and a travel limiting mechanism. The top of the mounting base is provided with an energy storage block quick-installation mechanism, and the travel limiting mechanism is sleeved inside the mover movement guide.

Images