Gravity energy storage system

Abstract

The present application relates to the field of gravity energy storage technology, specifically, to a gravity energy storage system, including a building module, and an energy conversion module and a weight transmission module both installed on the building module, the weight transmission module including a flexible transmission component and a weight string unit, the weight string unit including a plurality of weight blocks, each of which is fixed to the flexible transmission component, and each of which is distributed in the extension direction of the flexible transmission component, the energy conversion module and the flexible transmission component are in transmission cooperation, the energy conversion module is used to drive the weight string unit to move from bottom to top to achieve energy storage, and the weight string unit is used to move from top to bottom under the action of gravity and thereby drive the flexible transmission component to move to achieve energy release. The purpose of this application is to provide a gravity energy storage system in response to at least one technical problem involved in the background technology.

Description

Technical Field

[0001] The present application relates to the field of gravity energy storage technology, and in particular to a gravity energy storage system. Background Art

[0002] With the continuous development and improvement of my country's power grid, the country's power generation capacity is increasing rapidly. However, power consumption varies over time and space, with peak and trough periods. Most power generation methods are difficult to regulate, and clean energy generation methods are susceptible to external factors. This leads to a difficult-to-solve mismatch between generated power and consumed power. The problem of accommodating excess power generation has become a key challenge in the construction of new power systems. The application of gravity energy storage technology to renewable energy generation will help improve the power system's ability to absorb renewable energy and play a vital role in the stable operation of the power grid. Gravity energy storage is a method of storing energy using gravitational potential energy. The basic principle is to raise gravity power generation blocks to a high altitude to store energy. When the energy is needed, these blocks are lowered to drive a generator to generate electricity. However, existing gravity energy storage systems suffer from significant energy losses in non-energy conversion stages, reducing the effective conversion efficiency between gravitational potential energy and electrical energy. Summary of the Invention

[0003] The purpose of this application is to provide a gravity energy storage system to address at least one technical problem involved in the background technology.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] The present application provides a gravity energy storage system, comprising a building module, and an energy conversion module and a weight transmission module both installed on the building module.

[0006] The weight transmission module includes a flexible transmission component and a weight string unit, the weight string unit includes a plurality of weight blocks, each of the weight blocks is fixed to the flexible transmission component, and each of the weight blocks is distributed in the extension direction of the flexible transmission component.

[0007] The building module includes a building body, and an upper storage unit and a lower storage unit both installed on the building body, wherein the upper storage unit and the lower storage unit are both used to store the heavy object string unit.

[0008] The energy conversion module cooperates with the flexible transmission component in transmission. The energy conversion module is used to drive the heavy object string unit to move from the lower storage unit to the upper storage unit to achieve energy storage. The heavy object string unit is used to move from the upper storage unit to the lower storage unit under the action of gravity and then drive the flexible transmission component to move to achieve energy release.

[0009] Optionally, the length direction of the upper storage unit and the length direction of the lower storage unit are both parallel to the first direction, so that the weight blocks in the weight string unit located in the upper storage unit are distributed in the first direction, and the weight blocks in the weight string unit located in the lower storage unit are distributed in the first direction, and the first direction is arranged horizontally. The beneficial effect of this technical solution is that by making the length direction of the upper storage unit and the length direction of the lower storage unit parallel to the first direction, the weight blocks in the weight string unit can be arranged and stored in a horizontal direction. During the energy conversion process, the weight blocks originally located in the same upper storage unit or the same lower storage unit move a similar distance in the vertical direction during storage, and their contribution to energy conversion is also similar. Compared with arranging the weight blocks in a non-horizontal direction during storage, the weight conversion capacity is stronger.

[0010] Optionally, the upper storage unit includes an upper front guide wheel group and an upper rear end guide wheel group arranged in the first direction, and the lower storage unit includes a lower front guide wheel group and a lower rear end guide wheel group arranged in the first direction. In the first direction, the upper front guide wheel group and the lower front guide wheel group are both arranged close to one end of the building body, and the upper rear end guide wheel group and the lower rear end guide wheel group are both arranged close to the other end of the building body, and the flexible transmission component is sequentially transmitted with the upper front guide wheel group, the upper rear end guide wheel group, the lower rear end guide wheel group and the lower front guide wheel group.

[0011] The beneficial effect of this technical solution is that: in this way, a certain guide wheel group can be made into an active wheel group, and the energy conversion module drives the guide wheel group serving as the active wheel group, and then drives the flexible transmission component, so as to move the heavy object string unit on the flexible transmission component from the lower storage unit to the upper storage unit to realize the purpose of energy storage; at the same time, in the energy release stage, the heavy object string unit can also drive the guide wheel group serving as the active wheel group under the action of gravity, and then drive the energy conversion module to operate and realize energy release.

[0012] Optionally, the flexible transmission assembly includes two flexible transmission members arranged in the second direction, the weight block is a cylinder axially arranged parallel to the second direction, the two axial ends of the weight block are connected to the two flexible transmission members one by one, and the two flexible transmission members are sequentially transmitted with the upper front end guide wheel group, the upper rear end guide wheel group, the lower rear end guide wheel group and the lower front end guide wheel group, the second direction is parallel to the horizontal direction, and the second direction is perpendicular to the first direction.

[0013] The beneficial effect of this technical solution is that the movement of the weight block by two flexible transmission members can provide stable support for the weight block, thereby improving the safety and reliability of the gravity energy storage system. At the same time, since the weight block is a cylinder, and the two axial ends of the weight block are connected to the two flexible transmission members one by one, the center of gravity of the weight block overlaps with the flexible transmission members, thereby reducing the swing of the weight block due to inertia during the starting and stopping process, thereby improving the stability and safety of the gravity energy storage system. At the same time, the cylindrical weight block has better passability, making it less likely for the weight block to interfere with the surrounding environment.

[0014] Optionally, the upper storage unit and the lower storage unit can be detachably mounted on the building body, each weight block can be detachably mounted on the flexible transmission assembly, and the flexible transmission assembly can be detachably mounted on the lower front guide wheel group and the lower rear end guide wheel group.

[0015] The beneficial effect of this technical solution is that: in this way, the number of upper storage units and the number of lower storage units can be expanded or reduced as needed, and the flexible transmission components of appropriate length and the number of weight blocks installed on the flexible transmission components can be replaced as needed.

[0016] Optionally, the building module includes a plurality of upper storage units arranged in a vertical direction and a plurality of lower storage units arranged in a vertical direction, each of the upper storage units is located above each of the lower storage units, each of the weight blocks in the weight string unit is used to be distributed in each of the upper storage units so that each of the weight blocks is distributed in a comb-teeth shape, and each of the weight blocks in the weight string unit is used to be distributed in each of the lower storage units so that each of the weight blocks is distributed in a comb-teeth shape.

[0017] The beneficial effect of this technical solution is that by setting up multiple upper storage units and multiple lower storage units, more space for accommodating heavy object string units can be provided on the building module, thereby improving the energy storage capacity of the gravity energy storage system.

[0018] Optionally, a transition zone is provided between the upper storage unit at the bottom layer and the lower storage unit at the top layer, and the length of the weight string unit is greater than the sum of the lengths of the upper storage units, so that a portion of the weight string unit is located in the transition zone after energy storage is completed;

[0019] The length of the weight string unit is greater than the sum of the lengths of each of the lower storage units, so that a portion of the weight string unit is located in the transition zone after energy release is completed; or, the weight string unit is used to be arranged below the transition zone after energy release is completed.

[0020] The beneficial effects of this technical solution are: on the one hand, the transition zone can be used to store heavy blocks, thereby improving the energy storage capacity of the gravity energy storage system; on the other hand, the heavy blocks located in the transition zone are not supported by the upper storage unit, and are more likely to be displaced under the action of gravity, thereby enabling the heavy string unit to enter the energy release stage more smoothly.

[0021] Optionally, the energy conversion module includes a generator, a speed-increasing gearbox, a controllable clutch, a constant speed mechanism, a constant speed motor and a transmission unit. The generator, the speed-increasing gearbox, the controllable clutch, the constant speed mechanism and the transmission unit are sequentially connected in transmission connection, the constant speed motor is connected in transmission connection with the constant speed mechanism, and the transmission unit is coordinated in transmission with the flexible transmission assembly.

[0022] The beneficial effects of this technical solution are: the constant speed mechanism controls the speed of the flexible transmission component through the constant speed motor to ensure stable output during power generation, and the speed-increasing gearbox increases the speed of the flexible transmission component to the rated range of the generator, thereby improving power generation efficiency.

[0023] Optionally, the energy conversion module includes two controllable clutches, the energy conversion module also includes a clutch linkage mechanism and an energy storage motor, the transmission unit includes a gearbox, the gearbox is connected to the constant speed mechanism through one controllable clutch, the gearbox is connected to the energy storage motor through another controllable clutch, and the clutch linkage mechanism is connected to the two controllable clutches.

[0024] The beneficial effects of this technical solution are: the constant speed mechanism controls the speed of the flexible transmission component through the constant speed motor to ensure stable output during power generation, and the speed-increasing gearbox increases the speed of the flexible transmission component to the rated range of the generator, thereby improving power generation efficiency.

[0025] Optionally, the gravity energy storage system provided in the present application further includes a tensioning module, the tensioning module including a bracket, and a tensioning slider, a tensioning rope, a tensioning guide wheel group, a first tensioning wheel, a second tensioning wheel, a slider guide rail and a tensioning counterweight, all of which are mounted on the bracket.

[0026] The slider guide rail is arranged horizontally, the tensioning slider is slidably matched with the slider guide rail, the tensioning guide wheel group is fixed to the tensioning slider, the flexible transmission component is matched with the tensioning guide wheel group, the first tensioning wheel is fixed to the tensioning slider, the second tensioning wheel is fixed to the bracket, the tensioning slider, the first tensioning wheel and the second tensioning wheel are arranged in sequence in the length direction of the slider guide rail,

[0027] One end of the tensioning rope is fixed to the bracket, and the other end of the tensioning rope is passed around the first tensioning wheel and the second tensioning wheel and is fixedly connected to the tensioning counterweight.

[0028] The beneficial effect of this technical solution is that it keeps the flexible transmission component in a tensioned state at all times, making it less likely for the flexible transmission component to slip off the guide wheel groups, thereby improving the safety and reliability of the gravity energy storage system provided by this application. The tensioning counterweight sags under the action of gravity, the tensioning rope changes direction through the second tensioning wheel, and the gravity of the tensioning counterweight acts on the tensioning slider and the tensioning guide wheel group to tension the flexible transmission component.

[0029] The technical solution provided by this application can achieve at least one of the following beneficial effects:

[0030] In the gravity energy storage system provided by the present application, each weight block in the weight string unit is fixed on the flexible transmission component, and does not need to be separated from the flexible transmission component during the storage and movement of the weight string unit. Therefore, there is no need to set up a separate transport device to transport each weight block from the storage location to the flexible transmission component so that the flexible transmission component can load the weight blocks, or to unload the weight blocks on the flexible transmission component and move them to the storage location of the weight blocks, thereby reducing or completely avoiding the energy consumed in transporting the weight blocks between the storage location and the flexible transmission component, thereby improving the effective conversion efficiency between gravitational potential energy and electrical energy.

[0031] The additional technical features and advantages of this application will be more clearly explained in the following description, or can be understood through the specific practice of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] To more clearly illustrate the technical solutions of the specific embodiments of this application, the following briefly introduces the drawings required for describing the specific embodiments. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0033] Figure 1 A partial three-dimensional structural diagram of an embodiment of a gravity energy storage system provided in an embodiment of the present application;

[0034] Figure 2 This is a partial front view structural diagram of an embodiment of the gravity energy storage system provided in the present application. In this state, the gravity energy storage system has not yet generated electricity and the storage capacity is 100%;

[0035] Figure 3 This is a partial front view structural diagram of an embodiment of the gravity energy storage system provided in the embodiment of the present application. In this state, the power generation capacity of the gravity energy storage system is 60% and the storage capacity is 40%;

[0036] Figure 4This is a partial front view structural diagram of an embodiment of the gravity energy storage system provided in the embodiment of the present application. In this state, the power generation capacity of the gravity energy storage system is 100% and no energy has been stored;

[0037] Figure 5 A partial front view structural diagram of another embodiment of the gravity energy storage system provided in an embodiment of the present application. In this state, the power generation capacity of the gravity energy storage system is 100% and no energy has been stored;

[0038] Figure 6 A partial right-side cross-sectional structural diagram of an implementation scheme of a gravity energy storage system provided in an embodiment of the present application;

[0039] Figure 7 A schematic structural diagram of an implementation scheme of a tensioning module provided in an embodiment of the present application;

[0040] Figure 8 A partial structural diagram of an embodiment of the energy conversion module provided in the present application;

[0041] Figure 9 A partial structural diagram of an embodiment of the energy conversion module provided in the present application;

[0042] Figure 10 A partial structural diagram of another embodiment of the energy conversion module provided in the examples of the present application;

[0043] Figure 11 A partial structural diagram of another embodiment of the energy conversion module provided in the examples of the present application.

[0044] Reference numerals:

[0045] 01. Upper rear end guide wheel assembly; 02. Flexible transmission assembly;

[0046] 03. Upper front guide wheel set; 04. Heavy object block;

[0047] 06. Building module; 07. Lower rear end guide wheel assembly;

[0048] 08. Lower front guide wheel set; 09. Constant speed motor;

[0049] 10. Small transmission wheel; 11. Large transmission wheel;

[0050] 12. Generator; 13. Energy storage motor;

[0051] 14. Speed ​​increasing gearbox; 15. Constant speed mechanism;

[0052] 16. Gear box; 17. U-shaped connector;

[0053] 18. Controllable clutch; 19. First tensioner;

[0054] 20. Tensioning slider; 21. Tensioning counterweight;

[0055] 22. Bracket; 23. Tension rope;

[0056] 24. Tensioning guide wheel assembly; 25. Slider guide rail;

[0057] 26. Tensioning module; 27. Building body;

[0058] 28. Energy conversion module; 29. ​​Vertical shaft;

[0059] 30. Weight string unit; 31. Auxiliary tensioning guide wheel set;

[0060] 32. Upper storage unit; 33. Lower storage unit;

[0061] 34. Cylinder; 35. Flexible transmission part;

[0062] 36. Roller; 37. Upper transmission member guide track;

[0063] 38. Lower transmission guide rail; 39. Upper weight guide rail;

[0064] 40. Lower weight guide track; 41. Driving wheel set;

[0065] 42. Second tensioner. DETAILED DESCRIPTION

[0066] The following will clearly and completely describe the technical solution of this application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0067] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0068] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0069] like Figures 1 to 11 As shown, in the existing gravity system, the heavy blocks and the carrying device that carries the heavy blocks up and down are usually set separately, and the heavy blocks are transported between the heavy block storage device and the heavy block carrying device through a special carrying device for carrying the heavy blocks to realize the conversion between electrical energy and gravitational potential energy. In the process of the carrying device carrying the heavy blocks, the carrying device consumes a certain amount of energy, and the position of the heavy blocks often has a certain height change, which causes a large amount of energy to be lost in the transportation link of the heavy blocks, reducing the effective conversion efficiency between gravitational potential energy and electrical energy.

[0070] The present application provides a gravity energy storage system, comprising a building module 06, and an energy conversion module 28 and a weight transmission module both mounted on the building module 06.

[0071] The weight transmission module includes a flexible transmission component 02 and a weight string unit 30. The weight string unit 30 includes a plurality of weight blocks 04. Each weight block 04 is fixed to the flexible transmission component 02, and each weight block 04 is distributed in the extension direction of the flexible transmission component 02.

[0072] The building module 06 includes a building body 27, and an upper storage unit 32 and a lower storage unit 33 both installed on the building body 27. The upper storage unit 32 and the lower storage unit 33 are both used to store the heavy object string unit 30.

[0073] The energy conversion module 28 is coordinated with the flexible transmission component 02 for transmission. The energy conversion module 28 is used to drive the weight string unit 30 to move from the lower storage unit 33 to the upper storage unit 32 to realize energy storage. The weight string unit 30 is used to move from the upper storage unit 32 to the lower storage unit 33 under the action of gravity and thereby drive the flexible transmission component 02 to move to realize energy release.

[0074] It can be understood that the upper storage unit 32 is located above the lower storage unit 33 .

[0075] Specifically, after the energy storage stage is completed, at least part of the weight string unit 30 is located in the upper storage unit 32, and after the energy release stage is completed, at least part of the weight string unit 30 is located in the lower storage unit 33; the weight string unit 30 fixed to the flexible transmission component 02 is stored through the upper storage unit 32 and the lower storage unit 33, and reciprocates between the upper storage unit 32 and the lower storage unit 33 for storage to achieve energy storage and energy release.

[0076] In the gravity energy storage system provided by the present application, each weight block 04 in the weight string unit 30 is fixed on the flexible transmission component 02, and does not need to be separated from the flexible transmission component 02 during the storage and movement of the weight string unit 30. Therefore, there is no need to provide an additional transport device to transport each weight block 04 from the storage location to the flexible transmission component 02 so that the flexible transmission component 02 can load the weight block 04, or to unload the weight block 04 on the flexible transmission component 02 and move it to the storage location of the weight block 04, thereby reducing or completely avoiding the energy consumed in transporting the weight block 04 between the storage location and the flexible transmission component 02, thereby improving the effective conversion efficiency between gravitational potential energy and electrical energy; moreover, the weight string unit 30 and the flexible transmission component 02 move and stop synchronously. When the weight string unit 30 is in a stationary state, energy will not be wasted because the flexible transmission component 02 is still in motion, further improving the effective conversion efficiency between gravitational potential energy and electrical energy.

[0077] Optionally, the length direction of the upper storage unit 32 and the length direction of the lower storage unit 33 are both parallel to the first direction, so that the weight blocks 04 in the weight string unit 30 located in the upper storage unit 32 are distributed in the first direction, and the weight blocks 04 in the weight string unit 30 located in the lower storage unit 33 are distributed in the first direction, and the first direction is arranged horizontally. By making the length direction of the upper storage unit 32 and the length direction of the lower storage unit 33 both parallel to the first direction, the weight blocks 04 in the weight string unit 30 can be arranged and stored in a horizontal direction. During the energy conversion process, the weight blocks 04 originally located in the same upper storage unit 32 or the same lower storage unit 33 move similar distances in the vertical direction during storage, and their contributions to energy conversion are also similar. Compared with arranging the weight blocks 04 in a non-horizontal direction during storage, the weight conversion capacity is stronger. Of course, the distribution direction of each of the weight blocks 04 located in the upper storage unit 32 and / or the lower storage unit 33 in the weight string unit 30 may also be tilted relative to the horizontal plane.

[0078] Optionally, the upper storage unit 32 includes an upper front end guide wheel group 03 and an upper rear end guide wheel group 01 arranged in the first direction, and the lower storage unit 33 includes a lower front end guide wheel group 08 and a lower rear end guide wheel group 07 arranged in the first direction. In the first direction, the upper front end guide wheel group 03 and the lower front end guide wheel group 08 are both arranged close to one end of the building body 27, and the upper rear end guide wheel group 01 and the lower rear end guide wheel group 07 are both arranged close to the other end of the building body 27. The flexible transmission component 02 is sequentially transmitted and cooperated with the upper front end guide wheel group 03, the upper rear end guide wheel group 01, the lower rear end guide wheel group 07 and the lower front end guide wheel group 08. In this way, a certain guide wheel group can be made into the driving wheel group 41, and the energy conversion module 28 drives the guide wheel group serving as the driving wheel group 41, and then drives the flexible transmission component 02, so as to move the heavy object string unit 30 on the flexible transmission component 02 from the lower storage unit 33 to the upper storage unit 32 to realize the purpose of energy storage; at the same time, in the energy release stage, the heavy object string unit 30 can also drive the guide wheel group serving as the driving wheel group 41 under the action of gravity, and then drive the energy conversion module 28 to operate to realize energy release.

[0079] Optionally, the flexible transmission assembly 02 includes two flexible transmission members 35 arranged in the second direction, the weight block 04 is a cylinder axially arranged parallel to the second direction, and the two axial ends of the weight block 04 are connected to the two flexible transmission members 35 one by one, and the two flexible transmission members 35 are sequentially transmitted with the upper front end guide wheel group 03, the upper rear end guide wheel group 01, the lower rear end guide wheel group 07 and the lower front end guide wheel group 08, and the second direction is parallel to the horizontal direction, and the second direction is perpendicular to the first direction.

[0080] The movement of the weight block 04 by the two flexible transmission members 35 can provide stable support for the weight block 04, thereby improving the safety and reliability of the gravity energy storage system. At the same time, since the weight block 04 is a cylinder, and the two ends of the weight block 04 on the axial direction are connected to the two flexible transmission members 35 in a one-to-one manner, the center of gravity of the weight block 04 overlaps with the flexible transmission members 35, thereby reducing the swing of the weight block 04 due to inertia during the start and stop process, thereby improving the stability and safety of the gravity energy storage system. At the same time, the cylindrical weight block 04 has better passability, making it difficult for the weight block 04 to interfere with the surrounding environment. It can be understood that each of the above-mentioned guide wheel groups includes two guide wheels, which are connected by a connecting shaft, which is arranged parallel to the second direction. The two guide wheels are in one-to-one correspondence with the two flexible transmission members 35 for transmission, and the weight block 04 can pass between the two guide wheels when moving. Driving the weight block 04 to move by two flexible transmission members 35 can provide stable support for the weight block 04, thereby improving the safety and reliability of the gravity energy storage system. At the same time, since the weight block 04 is a cylinder, and the two axial ends of the weight block 04 are connected to the two flexible transmission members 35 one by one, the center of gravity of the weight block 04 overlaps with the flexible transmission members 35, thereby reducing the swing of the weight block 04 due to inertia during the starting and stopping process, thereby improving the stability and safety of the gravity energy storage system. At the same time, the cylindrical weight block 04 has better passability, making it difficult for the weight block 04 to interfere with the surrounding environment. The flexible transmission member 35 is preferably a ring chain. Accordingly, each guide wheel is a sprocket. The flexible transmission member 35 can also be a belt, steel belt or steel cable, etc. The corresponding guide wheel group can be a pulley. In addition to being guided by the guide wheel group, it can also be guided by a chute. The flexible transmission member 35 can also be non-ring-shaped, that is, a chain structure, belt, steel belt or steel cable that is not connected in the first place. In this case, the flexible transmission member 35 must retain sufficient length on both sides of the weight string unit 30 to allow the weight string unit 30 to smoothly enter the upper storage unit 32 and the lower storage unit 33. Of course, the flexible transmission assembly 02 can also include only one flexible transmission member 35; the weight block 04 can also be a cube, or the weight block 04 can be suspended below the flexible transmission assembly 02 through a connecting member.

[0081] like Figure 6As shown, in the embodiment of the present application, preferably, the upper storage unit 32 includes two upper weight guide rails 39 extending in the first direction, and the two upper weight guide rails 39 are arranged in the second direction. The weight string unit 30 also includes a plurality of rollers 36, and each weight block 04 is equipped with rollers 36 at both axial ends. When the weight block 04 is located in the upper storage unit 32, the rollers 36 at both ends of the weight block 04 are supported by the two upper weight guide rails 39 one by one, thereby reducing the load imposed on the flexible transmission component 02 by the weight block 04, reducing The risk of breakage of the low-flexible transmission member 35 is reduced, thereby improving safety and reliability; the lower storage unit 33 includes two lower-level weight guide rails 40 extending in the first direction, and the two lower-level weight guide rails 40 are arranged in the second direction. When the weight block 04 is located in the lower storage unit 33, the rollers 36 at both ends of the weight block 04 are supported by the two lower-level weight guide rails 40 one by one, thereby reducing the load given to the flexible transmission component 02 by the weight block 04, reducing the risk of breakage of the flexible transmission member 35, and improving safety and reliability. Furthermore, the upper storage unit 32 includes two upper transmission member guide rails 37 extending in the first direction, the two upper transmission member guide rails 37 are arranged in the second direction, the two upper weight guide rails 39 are located on the inner side of the two upper transmission member guide rails 37, and the parts of the two flexible transmission members 35 located in the upper storage unit 32 are supported by the two upper transmission member guide rails 37 in a one-to-one correspondence. In this way, the weight of the flexible transmission member 35 itself and the load applied to the flexible transmission member 35 by the weight block 04 in the upper storage unit 32 are borne by the corresponding upper transmission member guide rails 37, further reducing the risk of breakage of the flexible transmission member 35. Risk; The lower storage unit 33 includes two lower transmission member guide rails 38 extending in the first direction, the two lower transmission member guide rails 38 are arranged in the second direction, and the two lower weight guide rails 40 are located on the inner side of the two lower transmission member guide rails 38. The parts of the two flexible transmission members 35 located in the lower storage unit 33 are supported by the two lower transmission member guide rails 38 one by one. In this way, the weight of the flexible transmission member 35 itself and the load applied to the flexible transmission member 35 by the weight block 04 in the lower storage unit 33 are borne by the corresponding lower transmission member guide rails 38, further reducing the risk of the flexible transmission member 35 breaking.

[0082] Optionally, the upper storage units 32 and the lower storage units 33 are both detachably mounted on the building body 27, and each weight block 04 is detachably mounted on the flexible transmission assembly 02, which is detachably mounted on the lower front guide wheel assembly 08 and the lower rear guide wheel assembly 07. In this way, the number of upper storage units 32 and lower storage units 33 can be expanded or reduced as needed, and the number of flexible transmission assemblies 02 of appropriate lengths and the weight blocks 04 mounted thereon can be replaced as needed. Preferably, the overall height of the building body module can also be expanded, thereby increasing the capacity for storing the weight string units 30 and improving the energy storage capacity of the gravity energy storage system.

[0083] Optionally, the building module 06 includes a plurality of upper storage units 32 arranged in a vertical direction and a plurality of lower storage units 33 arranged in a vertical direction, each of the upper storage units 32 is located above each of the lower storage units 33, and each of the weight blocks 04 in the weight string unit 30 is used to be distributed in each of the upper storage units 32 so that each of the weight blocks 04 is distributed in a comb-like shape, and each of the weight blocks 04 in the weight string unit 30 is used to be distributed in each of the lower storage units 33 so that each of the weight blocks 04 is distributed in a comb-like shape. By providing a plurality of upper storage units 32 and a plurality of lower storage units 33, more space for accommodating the weight string unit 30 can be provided on the building module 06 to improve the energy storage capacity of the gravity energy storage system. In the embodiment of the present application, the number of upper storage units 32 and the number of lower storage units 33 are both at least two. Preferably, the number of the upper storage units 32 and the number of the lower storage units 33 may both be 2 to 6, for example, 3, 4 or 5. Figure 2 The embodiment shows that each of the weight blocks 04 is distributed in a comb-like shape. The flexible transmission component 02 uses two ring chains. The top of the flexible transmission component 02 cooperates with the energy conversion module 28, and the bottom of the flexible transmission component 02 cooperates with the tensioning module 26. The weight string unit 30 starts from the upper front guide wheel group 03 in the top storage unit 32 and extends in the first direction to the upper rear guide wheel group 01 in the top storage unit 32, and 2, the upper rear end guide wheel group 01 turns downward, cooperates with the upper rear end guide wheel group 01 of the next layer, and then turns again, so that the weight string unit 30 extends from the upper storage unit 32 of this layer to the upper front end guide wheel group 03 of this layer and bends downward again, the weight string unit 30 cooperates with the upper front end guide wheel group 03 of the next layer, and then turns again to enter the corresponding upper storage unit 32, and so on. The weight string unit 30 continues to bend so that the weight blocks 04 are evenly distributed in each upper storage unit 32. Figure 4 and Figure 5Two other embodiments are shown in which the weight blocks 04 are distributed in a comb-shaped manner, wherein at least part of the weight blocks 04 in the weight string unit 30 are distributed in each lower storage unit 33; it can be understood that when Figure 5 After all the weight blocks 04 in the weight string unit 30 shown have moved upwards to complete energy storage, the weight blocks 04 in the weight string unit 30 are completely located above the transition zone described below.

[0084] Optionally, a transition zone is formed between the upper storage unit 32 at the bottom and the lower storage unit 33 at the top, and the length of the weight string unit 30 is greater than the sum of the lengths of the upper storage units 32, so that a portion of the weight string unit 30 is located in the transition zone after energy storage is completed; that is, after energy storage is completed (e.g. Figure 2 (As shown in the figure), the weight string unit 30 fills all the upper storage units 32. At this time, a portion of the weight string unit 30 still cannot enter the upper storage unit 32. On the one hand, this allows the transition area to be used to store the weight blocks 04, thereby improving the energy storage capacity of the gravity energy storage system. On the other hand, the weight blocks 04 located in the transition area are not supported by the upper storage units 32, making them more likely to move under the action of gravity, thereby allowing the weight string unit 30 to enter the energy release stage more smoothly.

[0085] The present application also includes at least the following two embodiments: In the first embodiment, the length of the weight string unit 30 is greater than the sum of the lengths of the lower storage units 33, so that after the energy release is completed, a portion of the weight string unit 30 is located in the transition zone; that is, after the energy release is completed, the weight string unit 30 fills all the lower storage units 33, at which point a portion of the weight string unit 30 still cannot enter the lower storage units 33. In this way, the transition zone can be used to store the weight blocks 04, thereby improving the energy storage capacity of the gravity energy storage system.

[0086] In the first embodiment, the weight string unit 30 is used to be arranged below the transition zone after completing energy release. That is, after completing energy release, the weight string unit 30 all enters each lower storage unit 33 below the transition zone.

[0087] Compared with the first embodiment, more electric energy can be stored after further completing the energy storage stage on the basis of the second embodiment; compared with the second embodiment, less electric energy is consumed after further completing the energy storage stage on the basis of the first embodiment.

[0088] In the embodiment of the present application, the length of the upper storage unit 32 is preferably the distance between the upper front guide wheel assembly 03 and the upper rear guide wheel assembly 01. The length of the lower storage unit 33 is the distance between the lower front guide wheel assembly 08 and the lower rear guide wheel assembly 07. The length of the upper storage unit 32 is preferably equal to the length of the lower storage unit 33. Alternatively, when the upper front guide wheel assembly 03 in the top upper storage unit 32 serves as the driving wheel assembly 41, and the lower front guide wheel assembly 08 in the bottom lower storage unit 33 is also used for the tensioning module 26, the length of the upper storage unit 32 in the top layer is equal to the length of the lower storage unit 33 in the bottom layer, and the length of the upper storage unit 32 in the top layer is greater than the length of the other upper storage units 32, while the length of the lower storage unit 33 in the bottom layer is greater than the length of the other lower storage units 33.

[0089] like Figure 8 and Figure 9 As shown, optionally, the energy conversion module 28 includes a generator 12, a speed-increasing gearbox 14, a controllable clutch 18, a constant speed mechanism 15, a constant speed motor 09, and a transmission unit. The generator 12, the speed-increasing gearbox 14, the controllable clutch 18, the constant speed mechanism 15, and the transmission unit are sequentially connected in a transmission manner. The constant speed motor 09 is connected in a transmission manner to the constant speed mechanism 15, and the transmission unit is in transmission cooperation with the flexible transmission assembly 02. The constant speed mechanism 15 controls the speed of the flexible transmission assembly 02 through the constant speed motor 09 to ensure stable output during power generation. The speed-increasing gearbox 14 increases the speed of the flexible transmission assembly 02 to the rated range of the generator 12 to improve power generation efficiency.

[0090] Preferably, the transmission unit provided in the present application includes a gearbox 16, a small transmission wheel 10 and a large transmission wheel 11. The constant speed mechanism 15, the gearbox 16, the small transmission wheel 10 and the large transmission wheel 11 are sequentially transmitted and matched, and the large transmission wheel 11 is used to cooperate with a guide wheel group to realize power transmission. In the energy release stage: the flexible transmission component 02 moves downward under the action of the gravitational potential energy of the weight block 04, driving a guide wheel group serving as the active wheel group 41. The flexible transmission component 02 transmits power to the large transmission wheel 11 through the transmission shaft, and then transmits it to the small transmission wheel 10 that cooperates with it, so as to achieve the purpose of increasing speed and reducing torque. After that, the power is transmitted to the gearbox 16 through the shaft, and the gearbox 16 transmits power to the constant speed mechanism 15. At this time, the controllable clutch 18 connecting the constant speed mechanism 15 and the speed-increasing gearbox 14 is closed, and the constant speed mechanism 15 transmits power to the speed-increasing gearbox 14 through the controllable clutch 18. Finally, the speed of the transmission shaft is increased to the rated speed range of the generator 12 through the speed-increasing gearbox 14, completing the energy conversion process of gravitational potential energy and electrical energy. In the energy storage stage: the controllable clutch 18 connecting the constant speed mechanism 15 and the speed-increasing gearbox 14 is disconnected, and the constant speed motor 09, which serves as the energy storage motor, transmits power to the gearbox 16 through the constant speed mechanism 15, and then transmits power to the guide wheel group serving as the driving wheel group 41 through the small transmission wheel 10 and the large transmission wheel 11 that cooperate with each other, so that the driving wheel group 41 rotates in the opposite direction, driving the weight block 04 to rise, completing the energy conversion process between electrical energy and gravitational potential energy.

[0091] like Figure 10 and Figure 11 As shown, optionally, the energy conversion module 28 includes two controllable clutches 18, the energy conversion module 28 also includes a clutch linkage mechanism and an energy storage motor 13, the transmission unit includes a gearbox 16, the gearbox 16 is connected to the constant speed mechanism 15 through one controllable clutch 18, the gearbox 16 is connected to the energy storage motor 13 through another controllable clutch 18, and the clutch linkage mechanism is connected to the two controllable clutches 18. The constant speed mechanism 15 controls the speed of the flexible transmission component 02 through the constant speed motor 09 to ensure stable output during power generation. The speed-increasing gearbox 14 increases the speed of the flexible transmission component 02 to the rated range of the generator 12 to improve power generation efficiency. In the embodiment of the present application, preferably, the clutch linkage mechanism preferably includes a cylinder 34 fixed to the building body 27 and a U-shaped connector 17 fixed to the cylinder 34. The two ends of the U-shaped connector 17 are respectively connected to the two controllable clutches 18. The cylinder 34 controls the two controllable clutches 18 by driving the U-shaped connector 17.

[0092] Preferably, the transmission unit provided by the present application includes a small transmission wheel 10 and a large transmission wheel 11. The constant speed mechanism 15, the gearbox 16, the small transmission wheel 10 and the large transmission wheel 11 are sequentially driven and matched. The large transmission wheel 11 is used to cooperate with a guide wheel group to achieve power transmission. In the energy release stage: the flexible transmission component 02 moves downward under the action of the gravitational potential energy of the weight block 04, driving a guide wheel group as a driving wheel group 41. The driving wheel group 41 transmits power to the large transmission wheel 11 through the transmission shaft, and then transmits it to the small transmission wheel 10 that cooperates with it, achieving the purpose of increasing speed and reducing torque. After that, the power is transmitted to the gearbox 16 through the shaft. The clutch linkage mechanism is in the power generation position. The controllable clutch 18 connected to the constant speed mechanism 15 is closed. The gearbox 16 transmits power to the constant speed mechanism 15 through the controllable clutch 18. The speed of the constant speed mechanism 15 is controlled by the constant speed motor 09. Finally, the transmission shaft speed is increased to the rated speed range of the generator 12 through the speed-increasing gearbox 14, completing the energy conversion process of gravitational potential energy and electrical energy. During the energy storage phase, the clutch linkage mechanism is in the energy storage position, the controllable clutch 18 connected to the energy storage motor 13 is closed, and the energy storage motor 13 transmits power to the gearbox 16 through the controllable clutch 18. The power is then transmitted to the guide wheel group of the driving wheel group 41 through the small transmission wheel 10 and the large transmission wheel 11 that cooperate with each other, causing the driving wheel group 41 to rotate in the opposite direction, driving the weight block 04 to rise, completing the energy conversion process from electrical energy to gravitational potential energy. The clutch linkage mechanism can control the controllable clutch 18 to switch between the power generation and energy storage positions. During power generation, the controllable clutch 18 connected to the constant speed mechanism 15 is closed, and the controllable clutch 18 connected to the energy storage motor 13 is disconnected; during energy storage, the controllable clutch 18 connected to the constant speed mechanism 15 is disconnected, and the controllable clutch 18 connected to the energy storage motor 13 is closed.

[0093] like Figure 7 As shown, optionally, the gravity energy storage system provided in the present application further includes a tensioning module 26, the tensioning module 26 including a bracket 22, and a tensioning slider 20, a tensioning rope 23, a tensioning guide wheel group 24, a first tensioning wheel 19, a second tensioning wheel 42, a slider guide rail 25 and a tensioning counterweight 21, all of which are mounted on the bracket 22.

[0094] The slider guide rail 25 is arranged horizontally, the tensioning slider 20 is slidably matched with the slider guide rail 25, the tensioning guide wheel group 24 is fixed to the tensioning slider 20, the flexible transmission component 02 is matched with the tensioning guide wheel group 24, the first tensioning wheel 19 is fixed to the tensioning slider 20, and the second tensioning wheel 42 is fixed to the bracket 22. The tensioning slider 20, the first tensioning wheel 19 and the second tensioning wheel 42 are arranged in sequence in the length direction of the slider guide rail 25.

[0095] One end of the tensioning rope 23 is fixed to the bracket 22 , and the other end of the tensioning rope 23 passes through the first tensioning wheel 19 and the second tensioning wheel 42 and is fixedly connected to the tensioning weight 21 .

[0096] This ensures that the flexible transmission component 02 is always in a tensioned state, making it difficult for the flexible transmission component 02 to slip off the guide wheel groups, thereby improving the safety and reliability of the gravity energy storage system provided by this application. The tensioning counterweight 21 sags under the action of gravity, and the tensioning rope 23 changes direction through the second tensioning wheel 42, and the gravity of the tensioning counterweight 21 acts on the tensioning slider 20 and the tensioning guide wheel group 24, thereby tensioning the flexible transmission component 02.

[0097] Preferably, the lower front guide wheel group 08 in the lower storage unit 33 on the ground floor is the tensioning guide wheel group 24, which is indirectly mounted on the building body 27 via the bracket 22. An auxiliary tensioning guide wheel group 31 is also preferably fixed to the bracket 22. The tensioning rope 23 is preferably a steel wire rope. Preferably, the building body 27 includes a storage structure and a shaft 29 arranged in a first direction, the upper storage unit and the lower storage unit are installed in the storage structure, and the shaft 29 is arranged near each front guide wheel group in the first direction. The tensioning module 26 and the energy conversion module 28 are preferably both arranged in the shaft 29. The building module 06 can be an above-ground building or an underground building.

[0098] The gravity energy storage system provided by the present application can also achieve at least the following technical effects: through the fixed connection design between the flexible transmission component 02 and the weight block 04, the energy loss in the non-energy conversion link is reduced, and the conversion efficiency between gravitational potential energy and electrical energy is improved. The clutch linkage mechanism realizes the rapid switching between power generation and energy storage mode, meets the real-time peak regulation needs of the power grid, and the system response is flexible. The building module 06 adopts a modular multi-layer upper storage unit 32 and a multi-layer lower storage unit 33 design. By increasing the number of floors or raising the height of the building body 27, the energy storage capacity can be linearly expanded to the gigawatt-hour (GWh) level to meet the needs of power grids of different sizes. The charging and discharging time control strategy is optimized, and energy storage is used during off-peak electricity price periods and power generation during peak periods to reduce electricity costs. The constant speed mechanism 15 and the speed-increasing gearbox 14 are coordinated and controlled to ensure stable power output (fluctuation rate <5%) and reduce the pressure on power grid regulation. An anti-fall structure, a constant speed mechanism 15 (with brakes) and an accelerating mechanism are provided to prevent the weight from getting out of control; Control safety: The automation system monitors key components (such as chain status and anti-fall structure) in real time through multiple interlocking logics and sensors to ensure operational reliability.

[0099] The gravity energy storage system provided by the present application is used to achieve the following functions: a layered expandable storage structure: the overall structure is divided into upper storage units 32, lower storage units 33 and other areas, the flexible transmission component 02 meanders through the above areas via the guide wheel group at each corner, and a certain section of the ring chain is mounted with multiple weight blocks 04 to form a weight string unit 30. Not only can the upper storage units 32 and lower storage units 33 be expanded in multiple layers, but the height of the building body 27 can also be expanded to increase the power generation capacity. The energy storage capacity is highly expandable and the power generation efficiency is relatively high. When the weight block 04 string unit descends to the lower storage unit 33 due to gravitational potential energy, it can generate electricity. The motor reverses to lift the weight string unit 30 of the lower storage unit 33 to the upper storage unit 32 to complete the gravity energy storage.

[0100] The weight block 04 is fixed to the flexible transmission assembly 02 to form a weight string unit 30 comprising multiple weight blocks 04 arranged in a continuous pattern. This reduces energy loss in the non-convertible links of the weight block 04 and improves the overall efficiency of the system. Furthermore, rollers 36 are installed on both sides of the weight block 04, which roll in conjunction with the weight guide track to significantly reduce frictional resistance, improve mechanical efficiency, and reduce energy consumption.

[0101] The clutch linkage mechanism efficiently switches between power generation and energy storage modes via a controllable clutch 18 and clutch linkage. During power generation, the constant-speed mechanism 15 works in conjunction with the generator 12, using gravity to drive the sprocket (driving wheel assembly 41) and generate electricity. During energy storage, the energy storage motor 13 reverses the sprocket, lifting the weight 04 and storing potential energy. The constant-speed mechanism 15 (with brake) and speed-increasing mechanism prevent the weight from losing control. An automated system also ensures operational reliability through multiple interlocking logic and sensors that monitor key components (such as chain status) in real time.

[0102] Diverse adaptability of transmission mechanism: The core transmission can adopt a sprocket mechanism, and is compatible with a combination of slides, pulleys and belts, steel belts and cables, or alternative solutions such as gears, ratchets and gear belts to meet the needs of different scenarios.

[0103] Energy transmission path optimization: Building module 06 serves as the core channel for power generation and energy storage. Combined with the winding flexible transmission component 02 path design, it optimizes the conversion efficiency of gravitational potential energy and electrical energy, reducing losses during energy transmission.

[0104] Coordinated control of constant speed and speed increase: The constant speed mechanism 15 controls the speed of the guide wheel group serving as the driving wheel group 41 through the motor to ensure stable output during power generation; the speed increase gearbox 14 increases the speed of the guide wheel group serving as the driving wheel group 41 to the rated range of the generator 12, thereby improving power generation efficiency.

[0105] Continuous operation and high adaptability: The reciprocating motion of the weight block 04 on the flexible transmission component 02 supports uninterrupted charging and discharging, is suitable for distributed energy systems, and can match the peak and valley regulation needs of the power grid, enhancing the stability of the power system.

[0106] The tensioner system (including the first and second tensioners) is equipped with adjustable counterweights. By adding or removing these counterweights, the chain or belt tension is dynamically adjusted, ensuring the transmission system is always optimally tensioned. This adaptive mechanism adapts to temperature changes, load fluctuations, and other operating conditions, reducing the risk of loosening or overloading the flexible transmission assembly, thereby extending equipment life.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. Gravity energy storage system, characterized in that, It includes a building module, and an energy conversion module and a heavy object transmission module both installed on the building module. The weight transmission module includes a flexible transmission component and a weight string unit, the weight string unit includes a plurality of weight blocks, each of the weight blocks is fixed to the flexible transmission component, and each of the weight blocks is distributed in the extension direction of the flexible transmission component, the flexible transmission component includes two flexible transmission components arranged in a second direction, the weight block is a cylinder arranged axially parallel to the second direction, the two ends of the weight block in the axial direction are connected to the two flexible transmission components in a one-to-one correspondence, and the center of gravity of the weight block overlaps with the flexible transmission component, The building module includes a building body, and an upper storage unit and a lower storage unit both installed on the building body, wherein the upper storage unit and the lower storage unit are both used to store the heavy object string unit. The building module includes a plurality of upper storage units arranged in a vertical direction, and the weight blocks in the heavy object string unit are used to be distributed in the upper storage units so that the weight blocks are distributed in a comb-tooth shape. The energy conversion module is in transmission cooperation with the flexible transmission component. The energy conversion module is used to drive the weight string unit to move from the lower storage unit to the upper storage unit to achieve energy storage. The weight string unit is used to move from the upper storage unit to the lower storage unit under the action of gravity and then drive the flexible transmission component to move to achieve energy release. There is a transition zone between the upper storage unit at the bottom layer and the lower storage unit at the top layer, and the length of the heavy object string unit is greater than the sum of the lengths of each of the upper storage units, so that after energy storage is completed, the heavy object string unit fills all the upper storage units and a part of the heavy object string unit is located in the transition zone.

2. The gravity energy storage system according to claim 1, characterized in that: The length direction of the upper storage unit and the length direction of the lower storage unit are both parallel to the first direction, so that the weight blocks in the weight string unit located in the upper storage unit are distributed in the first direction, and the weight blocks in the weight string unit located in the lower storage unit are distributed in the first direction, and the first direction is horizontally set.

3. The gravity energy storage system according to claim 2, characterized in that: The upper storage unit includes an upper front guide wheel group and an upper rear end guide wheel group arranged in the first direction, and the lower storage unit includes a lower front guide wheel group and a lower rear end guide wheel group arranged in the first direction. In the first direction, the upper front guide wheel group and the lower front guide wheel group are both arranged close to one end of the building body, and the upper rear end guide wheel group and the lower rear end guide wheel group are both arranged close to the other end of the building body. The flexible transmission component is sequentially transmitted with the upper front guide wheel group, the upper rear end guide wheel group, the lower rear end guide wheel group and the lower front guide wheel group.

4. The gravity energy storage system according to claim 3, characterized in that: The two flexible transmission members are sequentially coupled with the upper front guide wheel group, the upper rear guide wheel group, the lower rear guide wheel group and the lower front guide wheel group, and the second direction is parallel to the horizontal direction, and the second direction is perpendicular to the first direction.

5. The gravity energy storage system according to claim 3, characterized in that: The upper storage unit and the lower storage unit can be detachably mounted on the building body, each weight block can be detachably mounted on the flexible transmission assembly, and the flexible transmission assembly can be detachably mounted on the lower front guide wheel group and the lower rear end guide wheel group.

6. The gravity energy storage system according to claim 2, characterized in that: The building module includes a plurality of lower storage units arranged in a vertical direction, each upper storage unit is located above each lower storage unit, and each weight block in the weight string unit is used to be distributed in each lower storage unit so that each weight block is distributed in a comb-teeth shape.

7. The gravity energy storage system according to claim 6, characterized in that: The length of the weight string unit is greater than the sum of the lengths of each of the lower storage units, so that a portion of the weight string unit is located in the transition zone after energy release is completed; or, the weight string unit is used to be arranged below the transition zone after energy release is completed.

8. The gravity energy storage system according to any one of claims 1 to 7, characterized in that: The energy conversion module includes a generator, a speed-increasing gearbox, a controllable clutch, a constant speed mechanism, a constant speed motor and a transmission unit. The generator, the speed-increasing gearbox, the controllable clutch, the constant speed mechanism and the transmission unit are sequentially connected in transmission connection. The constant speed motor is connected in transmission connection with the constant speed mechanism, and the transmission unit is matched in transmission with the flexible transmission assembly.

9. The gravity energy storage system according to claim 8, characterized in that: The energy conversion module includes two controllable clutches, and the energy conversion module also includes a clutch linkage mechanism and an energy storage motor. The transmission unit includes a gearbox, and the gearbox is connected to the constant speed mechanism through one controllable clutch, and the gearbox is connected to the energy storage motor through another controllable clutch. The clutch linkage mechanism is connected to the two controllable clutches.

10. The gravity energy storage system according to any one of claims 1 to 7, characterized in that: The system further comprises a tensioning module, the tensioning module comprising a bracket, and a tensioning slider, a tensioning rope, a tensioning guide wheel group, a first tensioning wheel, a second tensioning wheel, a slider guide rail and a tensioning counterweight, all of which are mounted on the bracket. The slider guide rail is arranged horizontally, the tensioning slider is slidably matched with the slider guide rail, the tensioning guide wheel group is fixed to the tensioning slider, the flexible transmission component is matched with the tensioning guide wheel group, the first tensioning wheel is fixed to the tensioning slider, the second tensioning wheel is fixed to the bracket, the tensioning slider, the first tensioning wheel and the second tensioning wheel are arranged in sequence in the length direction of the slider guide rail, One end of the tensioning rope is fixed to the bracket, and the other end of the tensioning rope is passed around the first tensioning wheel and the second tensioning wheel and is fixedly connected to the tensioning counterweight.

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