A moving coil type direct drive gravity energy storage device

Abstract

The utility model discloses a kind of moving-coil direct-drive gravity energy storage devices, belong to gravity energy storage technical field, comprising: direct-drive conveying system, energy storage unit and host computer;Direct-drive conveying system includes alternating current network, energy storage converter, direct-drive motor unit and several primary 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 performs 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 coil 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 conversion between 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 moved 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-coil direct-drive gravity energy storage device that can achieve the simultaneous independent control and operation of multiple movers through a moving-coil 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 coil 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-coil direct-drive gravity energy storage device includes:

[0008] Direct-drive conveying system, energy storage unit, and host computer;

[0009] The direct-drive transmission system includes an AC power grid, an energy storage converter, a direct-drive motor unit, and several primary 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 via a sliding contact DC bus of a sliding contact line structure.

[0010] The direct drive motor unit includes a secondary magnetic rail assembly, and a plurality of the primary moving parts are mounted on the secondary magnetic rail assembly, with DC bus insulated mounting on the secondary magnetic rail assembly;

[0011] The primary moving carrier is equipped with a current collector and an inverter driver;

[0012] 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 primary moving vehicle, or to transfer the energy storage blocks on the primary 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.

[0013] The energy storage blocks are transported to several primary moving parts by a transfer mechanism. The direct drive motor unit drives the primary moving parts and causes the energy storage blocks to move longitudinally, thereby realizing the conversion of energy from the energy storage blocks.

[0014] According to this solution, at least the following technical effects are achieved:

[0015] This moving-coil 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.

[0016] After several primary moving parts of this moving-coil direct-drive gravity energy storage device draw power from the DC bus through the current collector, the inverter driver starts. Upon receiving relevant instructions from the host computer, each of the primary moving parts can independently control the operation of multiple primary moving parts with the help of its own sensing system and inverter driver. This enables a single direct-drive motor unit to simultaneously drive the movement of multiple primary moving parts for charging and power generation, greatly improving 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, improving the overall operating efficiency and flexibility of the device.

[0017] Compared to traditional energy storage blocks, this moving-coil direct-drive gravity energy storage device eliminates unnecessary intermediate moving mechanisms. The moving-coil direct-drive method makes the combination layout of the direct-drive transmission system and energy storage unit 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.

[0018] As a further embodiment of this utility model: the secondary magnetic track assembly includes a charging and power generation secondary magnetic track and a return secondary magnetic track. The top and bottom of the charging and power generation secondary magnetic track and the return secondary magnetic track are respectively provided with a connection module, and a number of primary moving vehicles are respectively arranged on the charging and power generation secondary magnetic track and the return secondary magnetic track.

[0019] The secondary magnetic track assembly includes charging and power generation secondary magnetic tracks and a return secondary magnetic track. Connecting modules are installed at the top and bottom of these tracks. Several primary motion carriers are respectively mounted on the charging and power generation secondary magnetic tracks and the return secondary magnetic track. The charging and power generation secondary magnetic tracks provide a stable traveling wave magnetic field to the primary motion carriers, enabling them to generate a controllable traveling wave electromagnetic force, driving them to move along the traveling wave direction. Therefore, when the primary motion carrier carries the energy storage block and moves longitudinally upwards, the electrical energy consumed by the primary motion carrier is converted into the mechanical energy of the primary motion carrier and the energy storage block, until it reaches the designated drop and stops. All electrical energy is then converted back into the primary motion carrier's energy. The potential energy and kinetic energy of the device and energy storage block are 0. When the primary mover carrying the energy storage block descends vertically, the primary mover will generate electromagnetic induction with the charging and generating secondary magnetic rails, producing an induced current. This induced current is converted into direct current by the inverter driver inside the primary mover and fed to the DC bus. The DC current on the straight bus is then converted in the reverse direction by the energy storage converter to complete the grid feeding and achieve the effect of power generation. That is, the mechanical energy shared by the primary mover and energy storage block is converted into electrical energy on the AC grid. This process continues until the device descends to the designated drop and stops, at which point all the mechanical energy shared by the primary mover and energy storage block is converted into electrical energy, and the single power generation operation ends.

[0020] During energy storage, the primary moving vehicle efficiently converts electrical energy into mechanical energy of the primary moving vehicle and the energy storage block, reducing energy loss during the conversion process. Compared to some traditional energy storage methods, this method of converting electrical energy into gravitational potential energy is more direct and improves energy storage efficiency. During power generation, the primary moving vehicle generates an induced current through electromagnetic induction with the charging and generating secondary magnetic rails. The induced current is converted into direct current by the inverter driver inside the primary moving vehicle and fed to the DC bus. The DC current on the straight bus is then converted in reverse by the energy storage converter to complete the grid feeding and achieve the effect of power generation. This device realizes bidirectional conversion of electrical and mechanical energy, which can store excess electrical energy and release the stored energy during peak electricity demand, playing a role in regulating the supply and demand balance of the power grid and improving the stability and reliability of the power grid.

[0021] In addition, the docking module and the return secondary magnetic track are responsible for providing the driving force required for the periodic cyclical motion of the primary moving vehicle, which is used to realize the horizontal docking of the primary moving vehicle between the charging and power generation secondary magnetic track and the return secondary magnetic track, so that the entire gravity energy storage device can form a continuous working cycle. After the primary moving vehicle completes one charging and power generation process on the charging and power generation secondary magnetic track, it can quickly transfer to the return secondary magnetic track through the docking module 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.

[0022] As a further embodiment of this utility model: the charging and generating secondary magnetic track includes a mounting frame, a magnet 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 secondary magnetic track.

[0023] The charging and generating secondary magnetic rails include a mounting frame with several magnets on the top. Moving guides are provided on both sides of the mounting frame along the length of the charging and generating secondary magnetic rails. Several magnets are evenly distributed on one or both sides of the charging and generating secondary magnetic rails. The moving guides are used to provide the primary moving vehicle with the degrees of freedom required for movement in the traveling wave direction, ensuring that the primary moving vehicle can only move along the guide rail direction, and ensuring the stroke accuracy and controllability of the primary moving vehicle.

[0024] As a further embodiment of this utility model: the primary mover carrier also includes a mounting base, a mover coil group, and several sensors. The current collector is electrically connected to the DC bus sliding contact and to the wires of the inverter driver, and the several sensors are electrically connected to the inverter driver.

[0025] Since the primary mover carrier also includes a mounting base, a mover coil assembly, and several sensors, the current collector is electrically connected to the DC bus sliding contact and to the inverter driver's wires, and the sensors are electrically connected to the inverter driver. The primary mover carrier generates traveling wave motion by the traveling wave electromagnetic component force generated between the energized mover coil assembly and the secondary magnetic track. The inverter driver has bidirectional current inversion and signal receiving, transmitting, and processing functions. It can automatically adjust parameters such as inverter direction, voltage, and frequency after receiving and analyzing the information, ultimately ensuring that the primary mover carrier is in a completely controlled motion state. Furthermore, the sensors... The device is electrically connected to the inverter driver via wires. Sensors can accurately measure the current position, speed, acceleration, and other information of the primary mover, allowing the inverter driver to make corresponding judgments based on instructions. This enables precise control of the primary mover's motion state and allows for precise driving and positioning of the primary mover according to actual needs, ensuring that the primary mover accurately reaches the designated drop point and improving the accuracy of energy conversion. Simultaneously, the current collector can bidirectionally transmit electrical energy from the DC bus and the inverter driver. By installing the current collector on the primary mover, the primary mover can achieve sliding contact current collection or reverse power feeding.

[0026] As a further embodiment of this utility model: a walking limit mechanism is provided at the bottom of the primary moving part carrier and corresponding to the moving part guide member, and the walking limit mechanism is rolled and fitted inside the moving part guide member.

[0027] By setting a travel limit mechanism at the bottom of the primary mover carrier and corresponding to the mover movement guide, the travel limit mechanism is rolled and fitted inside the mover movement guide, so that the primary mover carrier only leaves the traveling wave movement degree of freedom, while the other degrees of freedom are reliably constrained, ensuring that the trajectory of the primary mover carrier is more accurate, and improving the working efficiency and performance of the entire energy storage system.

[0028] As a further embodiment of this utility model, the primary moving vehicle also includes a wireless transmitting and receiving module, which is connected to the host computer via signal transmission.

[0029] Since the primary mover also includes a wireless transmitter and receiver module, which is connected to the host computer, information or instructions can be transmitted between the two. This allows the primary mover's status information to be effectively transmitted to the host computer via the wireless transmitter and receiver module. The host computer then analyzes and processes the received information to automatically adjust parameters such as inverter direction, voltage, and frequency, ultimately ensuring that the primary mover is in a fully controlled motion state.

[0030] As a further improvement of this utility model, a signal repeater is also provided on the direct drive motor unit.

[0031] Since the direct drive motor unit is also equipped with a signal repeater, it can effectively improve the stability of receiving and sending control signals of multiple primary moving vehicles in the direct drive motor unit. During the operation of the direct drive motor system, the control signals of the primary moving vehicles may be interrupted due to distance, obstacles, etc. The signal repeater can receive and resend the control signals to ensure that the primary moving vehicles can continuously and stably receive signals, thereby ensuring their normal operation.

[0032] As a further embodiment of this utility model: the connection module includes a horizontal motion component and a secondary magnetic track in the connection area. The charging and power generation secondary magnetic track and the return secondary magnetic track are connected through the horizontal motion component, and the secondary magnetic track in the connection area is connected to the charging and power generation secondary magnetic track.

[0033] The docking module includes a horizontal motion component and a docking area secondary magnetic track. The charging / generating secondary magnetic track and the return secondary magnetic track are connected through the horizontal motion component. The docking area secondary magnetic track is connected to the charging / generating secondary magnetic track. The horizontal motion component enables the primary mover to dock horizontally between the charging / generating secondary magnetic track and the return secondary magnetic track. Furthermore, the docking area secondary magnetic track can participate in the charging and generating of the energy storage block. The length of the docking area secondary magnetic track is greater than the length of the primary mover to avoid horizontal docking motion interference and ensure the docking module can successfully complete the docking operation. Additionally, the return secondary magnetic track provides the electromagnetic component force in the traveling wave direction required for the primary mover's return and provides track constraints, enabling the primary mover to operate stably along a predetermined track during the return journey, ensuring the accuracy and controllability of its motion. Attached Figure Description

[0034] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0035] Figure 1 This is a schematic diagram of a moving-coil direct-drive gravity energy storage device.

[0036] Figure 2 A schematic diagram of the direct-drive delivery system of a moving-coil direct-drive gravity energy storage device;

[0037] Figure 3 A schematic diagram of the direct drive motor unit structure of a moving-coil direct drive gravity energy storage device;

[0038] Figure 4 A schematic diagram of the secondary magnetic track structure for charging and generating electricity in a moving-coil direct-drive gravity energy storage device.

[0039] Figure 5 A schematic diagram of the primary mover carrier structure of a moving-coil direct-drive gravity energy storage device;

[0040] Figure 6 This is a schematic diagram showing the position and time of each primary moving vehicle in the power generation mode of a moving coil direct-drive gravity energy storage device.

[0041] Figure label:

[0042] 1. Direct-drive transmission system; 11. AC power grid; 12. Energy storage converter; 13. Direct-drive motor unit; 131. Charging and generating secondary magnetic track; 1311. Mounting bracket; 1312. Magnet; 1313. Mover movement guide; 132. Return secondary magnetic track; 133. Connection module; 1331. Horizontal motion assembly; 1332. Connection area secondary magnetic track; 14. Primary mover carrier; 141. Current collector; 142. Inverter driver; 143. Mounting base; 144. Mover coil assembly; 145. Sensor; 146. Travel limit mechanism; 2. Energy storage unit; 21. Bottom storage area; 22. Top storage area; 23. Transfer mechanism; 24. Energy storage block. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] like Figure 1-5 The present invention, as shown in this embodiment, discloses a moving-coil direct-drive gravity energy storage device, comprising: a direct-drive transmission system 1, an energy storage unit 2, and a host computer; the direct-drive transmission system 1 includes an AC power grid 11, an energy storage converter 12, a direct-drive motor unit 13, and several primary 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 sliding contact DC bus; the direct-drive motor unit 13 includes a secondary magnetic track assembly, and several primary moving parts 14 are mounted on the secondary magnetic track assembly, with the DC bus insulated and mounted on the secondary magnetic track assembly; each primary moving part 14 is respectively equipped with a current collector 141 and an inverter driver 14. 2; The energy storage unit 2 includes several bottom storage areas 21, several top storage areas 22, and a transfer mechanism 23. Several energy storage blocks 24 are arranged in the several bottom storage areas 21 and several top storage areas 22. The transfer mechanism 23 is used to transfer the energy storage blocks 24 in the storage areas to the primary moving carrier 14, or to transfer the energy storage blocks 24 on the primary moving carrier 14 to the top storage area 21 or the bottom storage area 22, so as to preserve the current potential energy of the energy storage blocks 24. The energy storage blocks 24 are respectively transported to the several primary moving carriers 14 through the transfer mechanism 23. The direct drive motor unit 13 drives the several primary moving carriers 14 and drives the several energy storage blocks 24 to move longitudinally, thereby realizing the energy conversion of the energy storage blocks 24.

[0050] Specifically, this moving-coil 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 from the AC grid 11 is converted into the potential energy of the energy storage block 24 via 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.

[0051] After the primary moving parts 14 of this moving-coil direct-drive gravity energy storage device draw power from the DC bus through the current collector 141, the inverter driver 142 starts. After receiving relevant instructions from the host computer, each of the primary moving parts 14 can independently control the operation of the multiple primary moving parts 14 with the help of its own sensing system and inverter driver 142. This realizes the charging and power generation function of a single direct-drive motor unit 13 driving multiple primary moving parts 14 at the same time, which greatly improves the space efficiency ratio of gravity energy storage. This allows the system to store and convert more energy in a limited unit space and time. Furthermore, the multiple 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, which improves the overall operating efficiency and flexibility of the device.

[0052] Compared to traditional energy storage blocks, this moving-coil direct-drive gravity energy storage device eliminates unnecessary intermediate moving mechanisms. The moving-coil 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.

[0053] like Figure 3 As shown, the secondary magnetic track assembly includes a charging and power generation secondary magnetic track 131 and a return secondary magnetic track 132. The top and bottom of the charging and power generation secondary magnetic track 131 and the return secondary magnetic track 132 are respectively provided with a connection module 133, and a number of primary moving vehicles 14 are respectively arranged on the charging and power generation secondary magnetic track 131 and the return secondary magnetic track 132.

[0054] Specifically, the secondary magnetic track assembly includes a charging / generating secondary magnetic track 131 and a return secondary magnetic track 132. Connecting modules 133 are respectively installed at the top and bottom of the charging / generating secondary magnetic track 131 and the return secondary magnetic track 132. Several primary motion carriers 14 are respectively installed on the charging / generating secondary magnetic track 131 and the return secondary magnetic track 132. The charging / generating secondary magnetic track 131 provides a stable traveling wave magnetic field to the primary motion carriers 14, enabling the energized primary motion carriers 14 to generate a controllable traveling wave electromagnetic force, driving the primary motion carriers 14 to move along the traveling wave direction. Therefore, when the primary motion carriers 14 carry the energy storage block 24 and move vertically upwards, the electrical energy consumed by the primary motion carriers 14 is converted into the mechanical energy of the primary motion carriers 14 and the energy storage block 24, until they are lifted to the designated drop and stop, at which point all electrical energy is used. The potential energy of the primary moving vehicle 14 and the energy storage block 24 is converted into kinetic energy, which is 0. When the primary moving vehicle 14 carries the energy storage block 24 vertically downward, the primary moving vehicle 14 will generate electromagnetic induction with the charging and generating secondary magnetic rail 131 and generate an induced current. This induced current can be converted into DC current through the inverter driver 142 inside the primary moving vehicle 14 and fed to the DC bus. The DC current on the straight bus is then converted in reverse through the energy storage converter 12 to complete the grid feeding of electrical energy and achieve the effect of power generation. That is, the mechanical energy shared by the primary moving vehicle 14 and the energy storage block 24 is converted into electrical energy on the AC grid 11. The power generation work is completed until the vehicle descends to the designated drop and stops. All the mechanical energy shared by the primary moving vehicle 14 and the energy storage block 24 is converted into electrical energy, and the single power generation work ends.

[0055] During energy storage, the primary mover carrier 14 efficiently converts electrical energy into mechanical energy of itself and the energy storage block 24, reducing energy loss during the conversion process. Compared to some traditional energy storage methods, this method of converting electrical energy into gravitational potential energy is more direct and improves energy storage efficiency. During power generation, the primary mover carrier 14 generates an induced current through electromagnetic induction with the charging and generating secondary magnetic rail 131. The induced current is converted into direct current by the inverter driver 142 inside the primary mover carrier 14 and fed to the DC bus. The DC current on the straight bus is then converted in reverse by the energy storage converter 12 to complete the grid feeding and achieve the effect of power generation. This device realizes bidirectional conversion between electrical and mechanical energy, which can store excess electrical energy and release the stored energy during peak electricity demand, playing a role in regulating the grid supply and demand balance and improving the stability and reliability of the grid.

[0056] like Figure 4 As shown, the charging and generating secondary magnetic track 131 includes a mounting frame 1311, a plurality of magnets 1312 are provided on the top of the mounting frame 1311, and moving guide members 1313 are provided on both sides of the mounting frame 1311 and along the length of the charging and generating secondary magnetic track 131.

[0057] Specifically, the charging and generating secondary magnetic track 131 includes a mounting frame 1311, with several magnets 1312 on the top of the mounting frame 1311, and moving guide members 1313 on both sides of the mounting frame 1311 along the length of the charging and generating secondary magnetic track 131. The several magnets 1312 are evenly arranged on one or both sides of the charging and generating secondary magnetic track 131. The moving guide member 1313 is used to provide the primary moving carrier 14 with the degree of freedom required for the movement in the traveling wave direction, ensuring that the primary moving carrier 14 can only move along the guide rail direction, and ensuring the stroke accuracy and controllability of the primary moving carrier 14.

[0058] like Figure 5 As shown, the primary mover carrier 14 also includes a mounting base 143, a mover coil group 144, and several sensors 145. The current collector 141 is electrically connected to the DC bus sliding contact and to the wires of the inverter driver 142, and the several sensors 145 are electrically connected to the inverter driver 142.

[0059] Specifically, the primary mover carrier 14 also includes a mounting base 143, a mover coil assembly 144, and several sensors 145. The current receiver 141 is electrically connected to the DC bus sliding contact and to the inverter driver 142 via wires. The sensors 145 are electrically connected to the inverter driver 142. The primary mover carrier 14 generates traveling wave motion by relying on the traveling wave electromagnetic component force generated between the energized mover coil assembly 144 and the secondary magnetic track. The inverter driver 142 has bidirectional current inversion and signal reception, transmission, and processing functions. It can automatically adjust parameters such as inverter direction, voltage, and frequency after receiving and analyzing the information, ultimately ensuring that the primary mover carrier 14 is in a completely controlled motion state. Sensor 145 is electrically connected to inverter driver 142 via wires. Sensor 145 can accurately measure the current position, speed, acceleration and other information of primary mover 14, so that inverter driver 142 can make corresponding judgments according to instructions, realizing precise control of the motion state of primary mover 14. It can also accurately drive and position primary mover 14 according to actual needs, ensuring that primary mover 14 accurately reaches the designated drop point and improves the accuracy of energy conversion. At the same time, current collector 141 can transmit electrical energy from DC bus and inverter driver 142 in both directions. Through current collector 141 installed on primary mover 14, primary mover 14 can realize sliding contact current collection or reverse power feeding.

[0060] Furthermore, a travel limiting mechanism 146 is provided at the bottom of the primary moving vehicle 14 and corresponding to the moving vehicle moving guide 1313. The travel limiting mechanism 146 is rolled and fitted inside the moving vehicle moving guide 1313.

[0061] Specifically, by providing a travel limiting mechanism 146 at the bottom of the primary mover carrier 14 and corresponding to the mover movement guide 1313, the travel limiting mechanism 146 is rolled within the mover movement guide 1313, so that the primary mover carrier 14 only leaves the traveling wave movement degree of freedom, while the other degrees of freedom are reliably constrained, ensuring that the trajectory of the primary mover carrier 14 is more accurate, and improving the working efficiency and performance of the entire energy storage system.

[0062] Furthermore, the primary moving vehicle 14 also includes a wireless transmitting and receiving module, which is connected to the host computer via signal transmission.

[0063] Specifically, since the primary mover 14 also includes a wireless transmitting and receiving module, which is connected to the host computer, information or instructions can be transmitted between the wireless transmitting and receiving module and the host computer. The status information of the primary mover 14 can be effectively transmitted to the host computer through the wireless transmitting and receiving module. The received information is analyzed and processed to automatically adjust parameters such as inverter direction, voltage, and frequency, so that the primary mover 14 is in a completely controlled motion state.

[0064] Furthermore, a signal repeater is also provided on the direct drive motor unit 13.

[0065] Specifically, since a signal repeater is also provided on the direct drive motor unit 13, the stability of receiving and transmitting control signals of multiple primary moving vehicles 14 in the direct drive motor unit 13 can be effectively improved. During the operation of the direct drive motor system, the control signals of the primary moving vehicles 14 may be interrupted due to distance, obstacles, etc. The signal repeater can receive and resend the control signals to ensure that the primary moving vehicles can continuously and stably receive signals, thereby ensuring their normal operation.

[0066] like Figure 3 As shown, the connection module 133 includes a horizontal motion component 1331 and a secondary magnetic track 1332 in the connection area. The charging and power generation secondary magnetic track 131 and the return secondary magnetic track 132 are connected through the horizontal motion component 1331, and the secondary magnetic track 1332 in the connection area is connected to the charging and power generation secondary magnetic track 131.

[0067] Specifically, since the connection module 133 includes a horizontal motion component 1331 and a connection area secondary magnetic track 1332, the charging and power generation secondary magnetic track 131 and the return secondary magnetic track 132 are connected through the horizontal motion component 1331, and the connection area secondary magnetic track 1332 is connected to the charging and power generation secondary magnetic track 131. The horizontal motion component 1331 realizes the horizontal connection of the primary moving vehicle 14 between the charging and power generation secondary magnetic track 131 and the return secondary magnetic track 132, and the connection area secondary magnetic track 1332 can participate in the charging and power generation of the energy storage block 24. The length of the secondary magnetic track 1332 in the docking area is greater than the length of the primary moving vehicle 14, which avoids horizontal docking motion interference of the primary moving vehicle 14 and ensures that the docking module 133 can successfully complete the docking work. In addition, the return secondary magnetic track 132 is used to provide the electromagnetic component force in the traveling wave direction required by the primary moving vehicle 14 during the return and to provide track constraints, so that the secondary primary moving vehicle 14 can run stably along the predetermined track during the return process, ensuring the accuracy and controllability of its motion.

[0068] According to embodiments of the present invention, such as Figure 6 As 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 primary mover is simplified as follows: the top storage area and the bottom storage area are N layers, the connection time of the primary mover is t1, the positioning time of the primary mover of the adjacent layer is t2, then the positioning time of the primary mover of the Xth layer is (N-X+1)×2, the loading and unloading time of the energy storage block is t3, the power generation running time of the loaded primary mover is t4, and the return time of the unloaded primary mover is t5.

[0069] The cycle time of the primary moving vehicle at level X is simplified and broken down into the following steps:

[0070] 1. Connection, time t1;

[0071] 2 in place: (N-X+1)×2;

[0072] 3. Loading time: t3;

[0073] 4. Power generation operation: Time taken t4;

[0074] 5. Material unloading: Time taken t3;

[0075] 6. Positioned at the return transfer area, time x×t2;

[0076] 7. Return trip connection: Time taken t1;

[0077] 8. Return motion of unloaded mover: t5;

[0078] Adding up the times of each of the above steps, we can obtain the motion period T of the primary moving vehicle:

[0079] T=2×(t1+t3)+(N+1)×t2+t4+t5;

[0080] Let the cycle time of material transport be t, and the total number of primary moving vehicles required be M, then:

[0081] M = rounddown(T / t), where t can be adjusted according to actual needs.

[0082] Therefore, according to Figure 6 As shown, the linear representation is as follows: continuous lines represent the primary mover carrier in the charging and generating secondary magnetic track area, and dashed lines represent the primary mover carrier in the return secondary magnetic track and the secondary magnetic track area of ​​the docking zone. 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 the generating 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 primary mover carrier, the charging and generating power of each set of direct drive motor units can always remain consistent in the charging and generating states, without being affected by the loading and unloading of materials, thus effectively eliminating energy fluctuations.

[0083] During energy storage and power generation, by rationally adjusting the cycle time of each segment of the primary moving carrier 14, it is ensured that N-1 energy storage blocks 24 can operate simultaneously at any given time. This avoids power fluctuations caused by the loading and unloading actions of a single energy storage block 24, ensuring consistent and stable charging and power generation power, and effectively eliminating energy fluctuations. During the energy storage stage, stable charging power ensures the efficient operation of the energy storage process and avoids energy loss due to power instability. During 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.

[0084] 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.

[0085] 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. The primary moving carrier 14 draws power from the DC bus through the current collector 141 and starts the inverter driver 142. It receives instructions from the host computer and independently controls the operation of the primary moving carrier 14. The transfer mechanism 23 of the energy storage unit 2 is started, and the transfer mechanism 23 transports the energy storage block 24 into several primary moving carriers 14. The direct drive motor unit 13 drives several primary moving carriers 14 and drives the energy storage block 25 to move longitudinally, realizing the control of simultaneously driving several primary moving carriers 14 to store energy vertically upward and generate electricity vertically downward.

[0086] Furthermore, when the primary moving vehicle 14, carrying the energy storage block 24, ascends longitudinally via the power supply from the DC bus, the electrical energy consumed by the primary moving vehicle 14 is converted into the mechanical energy of the primary moving vehicle 14 and the energy storage block 24, until it is raised to the designated drop and stops. At this point, all the electrical energy is converted into the potential energy of the primary moving vehicle 14 and the energy storage block 24, and the kinetic energy is 0, thus realizing the longitudinal upward energy storage of the primary moving vehicle 14 and the energy storage block 24. When the primary moving vehicle 14, carrying the energy storage block 24, descends longitudinally, the primary moving vehicle 14 will interact with the charging and power generation... The secondary magnetic track 131 generates electromagnetic induction and produces an induced current. This induced current is converted into direct current by the inverter driver 142 inside the primary mover 14 and fed to the DC bus. The DC current on the straight bus is then converted in reverse by the energy storage converter 12 to complete the grid feeding and achieve the effect of power generation. This enables the primary mover 14 and energy storage block 24 to generate power downwards. Subsequently, the connection module 133 and the return secondary magnetic track 13 drive the primary mover 14 back to the initial position, ready for the next cycle.

[0087] Specifically, this moving-coil direct-drive gravity energy storage device uses a sliding contact line structure on a DC bus to allow the current collector 141 and inverter driver 142 mounted on the primary moving vehicle 14 to draw power from the DC bus via sliding contacts. This allows the primary moving vehicle 14, carrying the energy storage block 24, to move longitudinally upwards via the power supply from the DC bus, efficiently converting electrical energy into mechanical energy of the primary moving vehicle 14 and the energy storage block 24, and ultimately into potential energy. The entire process involves relatively few energy conversion stages, reducing energy loss during conversion and improving energy storage efficiency. Energy efficiency: When the primary mover carrier 14 carries the energy storage block 24 vertically downward, the primary mover carrier 14 and the charging and generating secondary magnetic rail 131 generate electromagnetic induction and generate an induced current. The induced current is converted into DC current by the inverter driver 142 inside the primary mover carrier 14 and fed to the DC bus. The DC current on the straight bus is then converted in reverse by the energy storage converter 12 to complete the grid feeding of electrical energy and achieve the effect of power generation. The stored potential energy is efficiently converted back into electrical energy, realizing the recycling of energy.

[0088] 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-coil direct-drive gravity energy storage device, characterized in that, include: Direct-drive conveying system, energy storage unit, and host computer; The direct-drive transmission system includes an AC power grid, an energy storage converter, a direct-drive motor unit, and several primary 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 via a sliding contact DC bus of a sliding contact line structure. The direct drive motor unit includes a secondary magnetic rail assembly, and a plurality of the primary moving parts are mounted on the secondary magnetic rail assembly, with DC bus insulated mounting on the secondary magnetic rail assembly; The primary moving carrier is equipped with a current collector and an inverter driver; 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 primary moving vehicle, or to transfer the energy storage blocks on the primary 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 primary moving parts by a transfer mechanism. The direct drive motor unit drives the primary 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-coil direct-drive gravity energy storage device according to claim 1, characterized in that, The secondary magnetic track assembly includes a charging and power generation secondary magnetic track and a return secondary magnetic track. The top and bottom of the charging and power generation secondary magnetic track and the return secondary magnetic track are respectively provided with a connection module, and several primary moving vehicles are respectively arranged on the charging and power generation secondary magnetic track and the return secondary magnetic track.

3. The moving-coil direct-drive gravity energy storage device according to claim 2, characterized in that, The charging and generating secondary magnetic track includes a mounting frame, with several magnets on the top of the mounting frame, and moving guides on both sides of the mounting frame along the length of the charging and generating secondary magnetic track.

4. The moving-coil direct-drive gravity energy storage device according to claim 3, characterized in that, The primary mover carrier also includes a mounting base, a mover coil assembly, and several sensors. The current collector is electrically connected to the DC bus via a sliding contact and to the inverter driver, respectively. The sensors are electrically connected to the inverter driver.

5. The moving-coil direct-drive gravity energy storage device according to claim 4, characterized in that, The primary moving part carrier is provided with a walking limit mechanism at its bottom, corresponding to the moving part guide, and the walking limit mechanism is rolled and fitted inside the moving part guide.

6. The moving-coil direct-drive gravity energy storage device according to claim 5, characterized in that, The primary moving vehicle also includes a wireless transmitting and receiving module, which is connected to the host computer via signal transmission.

7. The moving-coil direct-drive gravity energy storage device according to claim 6, characterized in that, The direct drive motor unit is also equipped with a signal repeater.

8. The moving-coil direct-drive gravity energy storage device according to claim 7, characterized in that, The connection module includes a horizontal motion component and a secondary magnetic track in the connection area. The charging and power generation secondary magnetic track and the return secondary magnetic track are connected through the horizontal motion component, and the secondary magnetic track in the connection area is connected to the charging and power generation secondary magnetic track.

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