Gravity energy storage system

Abstract

The invention relates to the technical field of gravity energy storage, in particular to a gravity energy storage system which comprises a building module, an energy conversion module and a weight transmission part module, the energy conversion module and the weight transmission part module are both installed on the building module, the weight transmission part module comprises a flexible transmission assembly and a weight string unit, and the weight string unit comprises a plurality of weight blocks. The weight blocks are fixed to the flexible transmission assembly and distributed in the extending direction of the flexible transmission assembly, the energy conversion module is in transmission fit with the flexible transmission assembly, and the energy conversion module is used for driving the weight string unit to move from bottom to top so as to achieve energy storage. And the weight string unit is used for moving from top to bottom under the action of gravity so as to drive the flexible transmission assembly to move to realize energy release. The invention aims to provide a gravity energy storage system aiming at at least one technical problem related in the background technology.

Description

Technical Field

[0001] This application relates to the technical field of gravity energy storage, and more specifically, to a gravity energy storage system. Background Art

[0002] With the continuous development and improvement of China's power grid, China's power generation has been increasing day by day. However, there are differences in power consumption in terms of time and space, with peak and off-peak periods of power consumption. Moreover, most power generation methods are difficult to adjust power, and combined with clean energy power generation methods that are vulnerable to external factors, it is difficult to solve the contradiction between power generation power and power consumption power. The problem of accommodating excess power generation has become one of the key challenges faced in the construction of a new power system. The application of gravity energy storage technology to new energy power generation is conducive to improving the power system's ability to accommodate renewable resource power generation and plays an important role in the stable operation of the power grid. Gravity energy storage is a method of storing energy using gravitational potential energy. Its basic principle is to store energy by lifting gravity power generation blocks to high places. When energy needs to be released, these gravity power generation blocks are then allowed to descend to drive a generator to generate electricity. However, in existing gravity energy storage systems, there is a large amount of energy loss in non-energy conversion links, 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 for at least one technical problem involved in the background art.

[0004] To achieve the above purpose, this application adopts the following technical solutions: This application provides a gravity energy storage system, including a building module, and an energy conversion module and a heavy object transmission part module both installed on the building module. The heavy object transmission part module includes a flexible transmission assembly and a heavy object string unit. The heavy object string unit includes a plurality of heavy object blocks, and each heavy object block is fixed to the flexible transmission assembly, and each heavy object block is distributed in the extending direction of the flexible transmission assembly. The building module includes a building body, and an upper storage unit and a lower storage unit both installed on the building body. The upper storage unit and the lower storage unit are both used to store the heavy object string unit. The energy conversion module is in transmission cooperation with the flexible transmission assembly. 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, and 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 assembly to move to achieve energy release.

[0005] Optionally, the length directions of the upper storage unit and the lower storage unit are both parallel to the first direction, so that the heavy object blocks in the upper storage unit of the heavy object string unit are distributed in the first direction, and the heavy object blocks in the lower storage unit of the heavy object string unit are distributed in the first direction. The first direction is horizontally arranged. The beneficial effect of this technical solution is that by making the length directions of the upper storage unit and the lower storage unit both parallel to the first direction, the heavy object blocks in the heavy object string unit can be arranged and stored in the horizontal direction. During the energy conversion process, the vertical movement distances of the heavy object blocks originally in the same upper storage unit or the same lower storage unit during storage are similar, and their contributions to energy conversion are also similar. Compared with arranging the heavy object blocks in a non-horizontal direction during storage, it has a stronger energy conversion ability.

[0006] Optionally, the upper storage unit includes an upper front end 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 end guide wheel group and a lower rear end guide wheel group arranged in the first direction. In the first direction, both the upper front end guide wheel group and the lower front end guide wheel group are arranged near one end of the building body, and both the upper rear end guide wheel group and the lower rear end guide wheel group are arranged near the other end of the building body. The flexible transmission assembly is in transmission cooperation 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 in sequence.

[0007] The beneficial effect of this technical solution is that in this way, a certain guide wheel group can be used as the driving wheel group. The energy conversion module drives the guide wheel group used as the driving wheel group, and then drives the flexible transmission assembly, so as to achieve the purpose of moving the heavy object string unit on the flexible transmission assembly from the lower storage unit to the upper storage unit for energy storage; at the same time, during the energy release stage, the heavy object string unit can also drive the guide wheel group used as the driving wheel group under the action of gravity, and then drive the energy conversion module to operate to release energy.

[0008] Optionally, the flexible transmission assembly includes two flexible transmission members arranged in the second direction. The heavy object block is a cylinder with its axis parallel to the second direction. The two ends of the heavy object block in the axial direction are respectively connected to the two flexible transmission members. The two flexible transmission members are in transmission cooperation 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 in sequence. The second direction is parallel to the horizontal direction and perpendicular to the first direction.

[0009] The beneficial effects of this technical solution are as follows: Driving the heavy object block to move through two flexible transmission components can provide stable support for the heavy object block, improving the safety and reliability of the gravity energy storage system. At the same time, since the heavy object block is a cylinder, and the two ends of the heavy object block in the axial direction are respectively connected to the two flexible transmission components, the center of gravity of the heavy object block overlaps with the flexible transmission components, thereby reducing the swing generated by the inertia effect during the start and stop processes of the heavy object block, improving the stability and safety of the gravity energy storage system. At the same time, the cylindrical heavy object block has better passability, making it not easy to interfere with the surrounding environment.

[0010] Optionally, the upper storage unit and the lower storage unit are both detachably installed on the building body, each heavy object block is detachably installed on the flexible transmission assembly, and the flexible transmission assembly is detachably installed on the lower front guide wheel set and the lower rear guide wheel set.

[0011] The beneficial effects of this technical solution are as follows: 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 assembly with a suitable length and the number of heavy object blocks installed on the flexible transmission assembly can be replaced as needed.

[0012] Optionally, the building module includes a plurality of upper storage units arranged vertically and a plurality of lower storage units arranged vertically. Each upper storage unit is located above each lower storage unit. Each heavy object block in the heavy object string unit is used to be distributed in each upper storage unit so that each heavy object block is distributed in a comb-like shape, and each heavy object block in the heavy object string unit is used to be distributed in each lower storage unit so that each heavy object block is distributed in a comb-like shape.

[0013] The beneficial effects of this technical solution are as follows: By providing a plurality of upper storage units and a plurality of lower storage units, more space for accommodating the heavy object string unit can be provided on the building module to improve the energy storage capacity of the gravity energy storage system.

[0014] Optionally, there is a transition area between the lowermost upper storage unit and the uppermost lower storage unit. The length of the heavy object string unit is greater than the sum of the lengths of each upper storage unit, so that a part of the heavy object string unit is located in the transition area after energy storage; The length of the heavy object string unit is greater than the sum of the lengths of each lower storage unit, so that a part of the heavy object string unit is located in the transition area after energy release; or, the heavy object string unit is used to be arranged below the transition area after energy release.

[0015] The beneficial effects of this technical solution are as follows: on the one hand, the transition area can be used to store heavy blocks, improving the energy storage capacity of the gravity energy storage system; on the other hand, the heavy blocks located in the transition area are not supported by the upper storage unit, and are more likely to displace under the action of gravity, thus enabling the heavy weight string unit to enter the energy release stage more smoothly.

[0016] 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. The constant speed motor is connected to the constant speed mechanism in transmission, and the transmission unit is in transmission cooperation with the flexible transmission assembly.

[0017] The beneficial effects of this technical solution are as follows: the constant speed mechanism controls the speed of the flexible transmission assembly through the constant speed motor to ensure stable output during power generation, and the speed increasing gearbox increases the speed of the flexible transmission assembly to the rated range of the generator, improving the power generation efficiency.

[0018] Optionally, the energy conversion module includes two controllable clutches. The energy conversion module further includes a clutch linkage mechanism and a storage motor. The transmission unit includes a gearbox. The gearbox is connected to the constant speed mechanism in transmission through one controllable clutch, and the gearbox is connected to the storage motor in transmission through another controllable clutch. The clutch linkage mechanism is connected to the two controllable clutches.

[0019] The beneficial effects of this technical solution are as follows: the constant speed mechanism controls the speed of the flexible transmission assembly through the constant speed motor to ensure stable output during power generation, and the speed increasing gearbox increases the speed of the flexible transmission assembly to the rated range of the generator, improving the power generation efficiency.

[0020] Optionally, the gravity energy storage system provided by the present application further includes a tensioning module. The tensioning module includes a bracket, and a tensioning slider, a tensioning rope, a tensioning guide pulley group, a first tensioning wheel, a second tensioning wheel, a slider guide rail, and a tensioning counterweight, all of which are installed on the bracket. The slider guide rail is horizontally arranged. The tensioning slider is slidably matched with the slider guide rail. The tensioning guide pulley group is fixed to the tensioning slider. The flexible transmission assembly is matched with the tensioning guide pulley 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 bypasses the first tensioning wheel and the second tensioning wheel and is fixedly connected to the tensioning counterweight.

[0021] The beneficial effects of this technical solution are as follows: This keeps the flexible transmission component always in a tensioned state, making it difficult for the flexible transmission component to slip off each guide wheel group, improving the safety and reliability of the gravity energy storage system provided by this application. The tension weight droops under the action of gravity. The tension rope changes direction through the second tension pulley, and the gravity of the tension weight acts on the tension slider and the tension guide wheel group, thereby tensioning the flexible transmission component.

[0022] The technical solution provided by this application can achieve at least one of the following beneficial effects: In the gravity energy storage system provided by this application, each heavy object block in the heavy object string unit is fixed on the flexible transmission component. During the storage and movement of the heavy object string unit, it is not necessary to separate from the flexible transmission component. Therefore, there is no need to separately set up a handling device to transport each heavy object block from the storage place to the flexible transmission component for the flexible transmission component to load the heavy object block, or to unload the heavy object block on the flexible transmission component and move it to the storage place of the heavy object block. As a result, the energy consumed in transporting the heavy object block between the storage place and the flexible transmission component is reduced or completely avoided, thereby improving the effective conversion efficiency between gravitational potential energy and electrical energy.

[0023] The additional technical features and their advantages of this application will be more clearly described in the following description content, or can be understood through the specific practice of this application. Description of the Drawings

[0024] In order to more clearly illustrate the technical solution of the specific implementation manner of this application, the drawings required for use in the description of the specific implementation manner will be briefly introduced below. Obviously, the drawings in the following description are some implementation manners of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 Partial three-dimensional structure schematic diagram of an implementation manner of the gravity energy storage system provided by an embodiment of this application; Figure 2 Partial front view structure schematic diagram of an implementation manner of the gravity energy storage system provided by an embodiment of this application. In this state, the gravity energy storage system has not generated electricity and the energy storage capacity is 100%; Figure 3 Partial front view structure schematic diagram of an implementation manner of the gravity energy storage system provided by an embodiment of this application. In this state, the power generation amount of the gravity energy storage system is 60% and the energy storage capacity is 40%; Figure 4 Partial front view structure schematic diagram of an implementation manner of the gravity energy storage system provided by an embodiment of this application. In this state, the power generation amount of the gravity energy storage system is 100% and it has not been energy-stored yet; Figure 5Partial front view structural schematic diagram of another implementation of the gravity energy storage system provided by the embodiments of the present application. In this state, the power generation of the gravity energy storage system is 100%, and it has not been stored yet; Figure 6 Partial right view cross-sectional structural schematic diagram of an implementation of the gravity energy storage system provided by the embodiments of the present application; Figure 7 Structural schematic diagram of an implementation of the tensioning module provided by the embodiments of the present application; Figure 8 Partial structural schematic diagram of an implementation of the energy conversion module provided by the embodiments of the present application; Figure 9 Partial structural schematic diagram of an implementation of the energy conversion module provided by the embodiments of the present application; Figure 10 Partial structural schematic diagram of another implementation of the energy conversion module provided by the embodiments of the present application; Figure 11 Partial structural schematic diagram of another implementation of the energy conversion module provided by the embodiments of the present application.

[0026] Reference numerals: 01, upper rear end guide wheel set; 02, flexible transmission assembly; 03, upper front end guide wheel set; 04, heavy object block; 06, building module; 07, lower rear end guide wheel set; 08, lower front end guide wheel set; 09, constant speed motor; 10, small transmission wheel; 11, large transmission wheel; 12, generator; 13, energy storage motor; 14, speed increasing gearbox; 15, constant speed mechanism; 16, gearbox; 17, U-shaped connecting piece; 18, controllable clutch; 19, first tensioning wheel; 20, tensioning slider; 21, tensioning counterweight; 22, bracket; 23, tensioning rope; 24, tensioning guide wheel set; 25, slider guide rail; 26, tensioning module; 27, building body; 28, energy conversion module; 29, shaft; 30, heavy object string unit; 31, auxiliary tensioning guide wheel set; 32, upper storage unit; 33, lower storage unit; 34, cylinder; 35, flexible transmission part; 36, roller; 37, upper transmission part guide track; 38. Lower transmission part guiding track; 39. Upper heavy object guiding track; 40. Lower heavy object guiding track; 41. Driving wheel set; 42. Second tensioning wheel. Detailed implementation manner

[0027] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0030] As Figures 1 to 11 shown, in the existing gravity system, usually the heavy object block and the carrying device for moving the heavy object block up and down are separately arranged, and a special carrying device for carrying the heavy object block is used to carry the heavy object block between the heavy object block storage device and the heavy object block carrying device to achieve the conversion between electric energy and gravitational potential energy. During the process of the carrying device carrying the heavy object block, the carrying device consumes a certain amount of energy, and the position of the heavy object block also often has a certain height change, thereby causing a large amount of energy loss in the handling link of the heavy object block and reducing the effective conversion efficiency between gravitational potential energy and electric energy.

[0031] The present application provides a gravity energy storage system, including a building module 06, and an energy conversion module 28 and a heavy object transmission part module both installed on the building module 06. The heavy object transmission module includes a flexible transmission assembly 02 and a heavy object string unit 30. The heavy object string unit 30 includes a plurality of heavy object blocks 04. Each of the heavy object blocks 04 is fixed to the flexible transmission assembly 02, and the heavy object blocks 04 are distributed in the extending direction of the flexible transmission assembly 02. 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 for storing the heavy object string unit 30. The energy conversion module 28 is in transmission cooperation with the flexible transmission assembly 02. The energy conversion module 28 is used to drive the heavy object string unit 30 to move from the lower storage unit 33 to the upper storage unit 32 to achieve energy storage. The heavy object 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 then drive the flexible transmission assembly 02 to move to achieve energy release.

[0032] It can be understood that the upper storage unit 32 is located above the lower storage unit 33.

[0033] Specifically, after the energy storage stage is completed, at least part of the heavy object string unit 30 is located in the upper storage unit 32. After the energy release stage is completed, at least part of the heavy object string unit 30 is located in the lower storage unit 33. The heavy object string unit 30 fixed to the flexible transmission assembly 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.

[0034] In the gravity energy storage system provided by the present application, each heavy object block 04 in the heavy object string unit 30 is fixed on the flexible transmission assembly 02, and there is no need to separate from the flexible transmission assembly 02 during the storage and movement of the heavy object string unit 30. Therefore, there is no need to separately provide a handling device to transport each heavy object block 04 from the storage place to the flexible transmission assembly 02 for the flexible transmission assembly 02 to load the heavy object block 04, or unload the heavy object block 04 on the flexible transmission assembly 02 and move it to the storage place of the heavy object block 04. Thus, the energy consumed in transporting the heavy object block 04 between the storage place and the flexible transmission assembly 02 is reduced or completely avoided, and the effective conversion efficiency between gravitational potential energy and electric energy is improved. Moreover, the heavy object string unit 30 moves and stops synchronously with the flexible transmission assembly 02. When the heavy object string unit 30 is in a stationary state, no energy is wasted because the flexible transmission assembly 02 is still in a moving state, further improving the effective conversion efficiency between gravitational potential energy and electric energy.

[0035] Optionally, the length directions of both the upper storage unit 32 and the lower storage unit 33 are parallel to the first direction, so that the heavy object blocks 04 located in the upper storage unit 32 in the heavy object string unit 30 are distributed in the first direction, and the heavy object blocks 04 located in the lower storage unit 33 in the heavy object string unit 30 are distributed in the first direction. The first direction is horizontally arranged. By making the length directions of both the upper storage unit 32 and the lower storage unit 33 parallel to the first direction, the heavy object blocks 04 in the heavy object string unit 30 can be arranged and stored in the horizontal direction. During the energy conversion process, the moving distances of the heavy object blocks 04 originally located in the same upper storage unit 32 or the same lower storage unit 33 in the vertical direction are similar, and their contributions to the energy conversion are also similar. Compared with arranging the heavy object blocks 04 in a non-horizontal direction during storage, it has a stronger energy conversion ability. Of course, the distribution directions of the heavy object blocks 04 located in the upper storage unit 32 and / or the lower storage unit 33 in the heavy object string unit 30 can also be inclined relative to the horizontal plane.

[0036] Optionally, the upper storage unit 32 includes an upper front end guide wheel set 03 and an upper rear end guide wheel set 01 arranged in the first direction, and the lower storage unit 33 includes a lower front end guide wheel set 08 and a lower rear end guide wheel set 07 arranged in the first direction. In the first direction, both the upper front end guide wheel set 03 and the lower front end guide wheel set 08 are arranged near one end of the building body 27, and both the upper rear end guide wheel set 01 and the lower rear end guide wheel set 07 are arranged near the other end of the building body 27. The flexible transmission component 02 is in transmission cooperation with the upper front end guide wheel set 03, the upper rear end guide wheel set 01, the lower rear end guide wheel set 07, and the lower front end guide wheel set 08 in sequence. In this way, a certain guide wheel set can be used as the driving wheel set 41. The energy conversion module 28 drives the guide wheel set used as the driving wheel set 41, and then drives the flexible transmission component 02, so as to achieve the purpose of moving the heavy object string unit 30 on the flexible transmission component 02 from the lower storage unit 33 to the upper storage unit 32 for energy storage; at the same time, during the energy release stage, the heavy object string unit 30 can also drive the guide wheel set used as the driving wheel set 41 under the action of gravity, and then drive the energy conversion module 28 to operate to release energy.

[0037] Optionally, the flexible transmission assembly 02 includes two flexible transmission members 35 arranged in the second direction. The heavy object block 04 is a cylinder with its axis parallel to the second direction. The two ends of the heavy object block 04 in the axial direction are respectively connected to the two flexible transmission members 35. The two flexible transmission members 35 are respectively in transmission cooperation with the upper front guide wheel set 03, the upper rear guide wheel set 01, the lower rear guide wheel set 07 and the lower front guide wheel set 08. The second direction is parallel to the horizontal direction and perpendicular to the first direction.

[0038] Driving the heavy object block 04 to move through the two flexible transmission members 35 can provide stable support for the heavy object block 04, improving the safety and reliability of the gravity energy storage system. At the same time, since the heavy object block 04 is a cylinder and the two ends of the heavy object block 04 in the axial direction are respectively connected to the two flexible transmission members 35, the center of gravity of the heavy object block 04 overlaps with the flexible transmission members 35, thereby reducing the swing generated by the inertia during the start and stop processes of the heavy object block 04, improving the stability and safety of the gravity energy storage system. At the same time, the cylindrical heavy object block 04 has better passability, making it not easy to interfere with the surrounding environment. It can be understood that each of the above-mentioned guide wheel sets includes two guide wheels, which are connected by a connecting shaft. The connecting shaft is arranged parallel to the second direction, and the two guide wheels are respectively in transmission cooperation with the two flexible transmission members 35. The heavy object block 04 can pass between the two guide wheels when moving. Driving the heavy object block 04 to move through the two flexible transmission members 35 can provide stable support for the heavy object block 04, improving the safety and reliability of the gravity energy storage system. At the same time, since the heavy object block 04 is a cylinder and the two ends of the heavy object block 04 in the axial direction are respectively connected to the two flexible transmission members 35, the center of gravity of the heavy object block 04 overlaps with the flexible transmission members 35, thereby reducing the swing generated by the inertia during the start and stop processes of the heavy object block 04, improving the stability and safety of the gravity energy storage system. At the same time, the cylindrical heavy object block 04 has better passability, making it not easy to interfere with the surrounding environment. The flexible transmission member 35 is preferably a ring chain. Correspondingly, each guide wheel is a sprocket. The flexible transmission member 35 can also be a belt, a steel belt or a steel cable, etc. Correspondingly, the guide wheel set can be a pulley. In addition to guiding through the guide wheel set, it can also be guided through a chute. The flexible transmission member 35 can also be non-circular, that is, a chain structure, a belt, a steel belt or a steel cable that is not connected end to end. At this time, sufficient lengths need to be reserved on both sides of the heavy object string unit 30 for the flexible transmission member 35 to enable the heavy object 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 heavy object block 04 can also be a cube, or the heavy object block 04 can be suspended below the flexible transmission assembly 02 through a connecting piece.

[0039] As Figure 6 shown, in the embodiment of the present application, preferably, the upper storage unit 32 includes two upper heavy object guiding rails 39 extending in the first direction, and the two upper heavy object guiding rails 39 are arranged in the second direction. The heavy object string unit 30 further includes a plurality of rollers 36. Rollers 36 are installed at both axial ends of each heavy object block 04. When the heavy object block 04 is located in the upper storage unit 32, the rollers 36 at both ends of the heavy object block 04 are respectively carried by the two upper heavy object guiding rails 39, thereby reducing the load applied by the heavy object block 04 to the flexible transmission assembly 02, reducing the risk of breakage of the flexible transmission member 35, and improving safety and reliability; the lower storage unit 33 includes two lower heavy object guiding rails 40 extending in the first direction, and the two lower heavy object guiding rails 40 are arranged in the second direction. When the heavy object block 04 is located in the lower storage unit 33, the rollers 36 at both ends of the heavy object block 04 are respectively carried by the two lower heavy object guiding rails 40, thereby reducing the load applied by the heavy object block 04 to the flexible transmission assembly 02, reducing the risk of breakage of the flexible transmission member 35, and improving safety and reliability. Further, the upper storage unit 32 includes two upper transmission member guiding rails 37 extending in the first direction, and the two upper transmission member guiding rails 37 are arranged in the second direction. The two upper heavy object guiding rails 39 are located inside the two upper transmission member guiding rails 37. The portions of the two flexible transmission members 35 located in the upper storage unit 32 are respectively carried by the two upper transmission member guiding rails 37. In this way, the self-weight of the flexible transmission member 35 and the load applied by the heavy object block 04 on the flexible transmission member 35 in the upper storage unit 32 are borne by the corresponding upper transmission member guiding rails 37, further reducing the risk of breakage of the flexible transmission member 35; the lower storage unit 33 includes two lower transmission member guiding rails 38 extending in the first direction, and the two lower transmission member guiding rails 38 are arranged in the second direction. The two lower heavy object guiding rails 40 are located inside the two lower transmission member guiding rails 38. The portions of the two flexible transmission members 35 located in the lower storage unit 33 are respectively carried by the two lower transmission member guiding rails 38. In this way, the self-weight of the flexible transmission member 35 and the load applied by the heavy object block 04 on the flexible transmission member 35 in the lower storage unit 33 are borne by the corresponding lower transmission member guiding rails 38, further reducing the risk of breakage of the flexible transmission member 35.

[0040] Optionally, the upper storage unit 32 and the lower storage unit 33 are both detachably mounted on the building body 27, each of the heavy blocks 04 is detachably mounted on the flexible transmission assembly 02, and the flexible transmission assembly 02 is detachably mounted on the lower front guide wheel set 08 and the lower rear guide wheel set 07. In this way, the number of upper storage units 32 and the number of lower storage units 33 can be expanded or reduced as needed, and the flexible transmission assembly 02 with a suitable length and the number of heavy blocks 04 mounted on the flexible transmission assembly 02 can be replaced as needed. Preferably, the total height of the building body module can also be expanded, thereby improving the ability to store the heavy object string unit 30 and enhancing the energy storage capacity of the gravity energy storage system.

[0041] Optionally, the building module 06 includes a plurality of upper storage units 32 arranged vertically and a plurality of lower storage units 33 arranged vertically. Each of the upper storage units 32 is located above each of the lower storage units 33. Each of the heavy blocks 04 in the heavy object string unit 30 is used to be distributed in each of the upper storage units 32 so that each of the heavy blocks 04 is distributed in a comb-like shape. Each of the heavy blocks 04 in the heavy object string unit 30 is used to be distributed in each of the lower storage units 33 so that each of the heavy 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 heavy object string unit 30 can be provided on the building module 06 to enhance the energy storage capacity of the gravity energy storage system. In the embodiments 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 upper storage units 32 and the number of lower storage units 33 can both be 2 to 6. For example, they can both be 3, 4, or 5. Figure 2 An embodiment showing the comb-like distribution of each of the heavy blocks 04 is illustrated. The flexible transmission assembly 02 adopts two endless chains. The top end of the flexible transmission assembly 02 cooperates with the energy conversion module 28, and the bottom end of the flexible transmission assembly 02 cooperates with the tensioning module 26. The heavy object string unit 30 starts from the upper front guide wheel set 03 in the topmost upper storage unit 32 and extends in the first direction to the upper rear guide wheel set 01 in the topmost upper storage unit 32. And it turns downward at the upper rear guide wheel set 01 in the topmost upper storage unit 32, cooperates with the upper rear guide wheel set 01 of the next layer and then turns again, so that the heavy object string unit 30 extends in the upper storage unit 32 of this layer to the upper front guide wheel set 03 of this layer and bends downward again. After the heavy object string unit 30 cooperates with the upper front guide wheel set 03 of the next lower layer and turns again, it enters the corresponding upper storage unit 32, and so on. The heavy object string unit 30 keeps bending so that each upper storage unit 32 is distributed with heavy blocks 04. Figure 4 and Figure 5Shows another two implementation manners in which each of the heavy object blocks 04 is distributed in a comb-like shape. Among them, at least some of the heavy object blocks 04 in the heavy object string unit 30 are distributed in each lower storage unit 33; it can be understood that when Figure 5 After all the heavy object blocks 04 in the shown heavy object string unit 30 are lifted up to complete energy storage, all the heavy object blocks 04 in the heavy object string unit 30 are completely above the transition zone described below.

[0042] Optionally, a transition zone is provided between the uppermost upper storage unit 32 and the lowermost lower storage unit 33. The length of the heavy object string unit 30 is greater than the sum of the lengths of each of the upper storage units 32, so that after energy storage is completed, a part of the heavy object string unit 30 is located in the transition zone; that is to say, after energy storage is completed (as Figure 2 shown), the heavy object string unit 30 fills all the upper storage units 32. At this time, a part of the heavy object string unit 30 still fails to enter the upper storage unit 32. On the one hand, this can utilize the transition zone to store the heavy object blocks 04 and improve the energy storage capacity of the gravity energy storage system. On the other hand, each of the heavy object blocks 04 located in the transition zone is not supported by the upper storage unit 32 and is more likely to generate displacement under the action of gravity, thereby enabling the heavy object string unit 30 to enter the energy release stage more smoothly.

[0043] The embodiments of the present application further include at least the following two implementation manners: In the first implementation manner, the length of the heavy object string unit 30 is greater than the sum of the lengths of each of the lower storage units 33, so that after energy release is completed, a part of the heavy object string unit 30 is located in the transition zone; that is to say, after energy release is completed, the heavy object string unit 30 fills all the lower storage units 33. At this time, a part of the heavy object string unit 30 still fails to enter the lower storage unit 33. In this way, the transition zone can be utilized to store the heavy object blocks 04 and improve the energy storage capacity of the gravity energy storage system.

[0044] In the first implementation manner, the heavy object string unit 30 is configured to be disposed below the transition zone after energy release is completed. That is to say, after energy release is completed, the entire heavy object string unit 30 enters the lower storage units 33 below the transition zone.

[0045] Compared with the first implementation manner, more electric energy can be stored after the energy storage stage is further completed in the second implementation manner; compared with the second implementation manner, less electric energy is consumed in the first implementation manner when the energy storage stage is further completed.

[0046] In the embodiment of the present application, preferably, the length of the upper storage unit 32 is the distance between the upper front guide wheel group 03 and the upper rear guide wheel group 01. The length of the lower storage unit 33 is the distance between the lower front guide wheel group 08 and the lower rear guide wheel group 07. The length of the upper storage unit 32 is preferably equal to the length of the lower storage unit 33; or, when the upper front guide wheel group 03 in the upper storage unit 32 at the top layer is used as the driving wheel group 41, and the lower front guide wheel group 08 in the lower storage unit 33 at the bottom layer is also used for the tensioning module 26, the length of the upper storage unit 32 at the top layer is equal to the length of the lower storage unit 33 at the bottom layer, and the length of the upper storage unit 32 at the top layer is greater than the length of other upper storage units 32, and the length of the lower storage unit 33 at the bottom layer is greater than the length of other lower storage units 33.

[0047] 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, wherein 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 transmission, the constant speed motor 09 is connected in transmission with the constant speed mechanism 15, and the transmission unit is matched in transmission with the flexible transmission component 02. 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, and 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.

[0048] Preferably, the transmission unit provided in the present application includes a gear box 16, a small transmission wheel 10 and a large transmission wheel 11, and the constant speed mechanism 15, the gear box 16, the small transmission wheel 10 and the large transmission wheel 11 are sequentially transmitted and cooperated, 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 as a driving 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 gear box 16 through the shaft, and the gear box 16 transmits the power to the constant speed mechanism 15. At this time, the controllable clutch 18 connecting the constant speed mechanism 15 and the speed-increasing gear box 14 is closed, and the constant speed mechanism 15 transmits power to the speed-increasing gear box 14 through the controllable clutch 18. Finally, the transmission shaft speed is increased to the rated speed range of the generator 12 through the speed-increasing gear box 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, as an energy storage motor, transmits power to the gearbox 16 through the constant speed mechanism 15, and then transmits power to the guide wheel group 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 of electrical energy and gravitational potential energy.

[0049] 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 gear box 16, the gear box 16 is connected to the constant speed mechanism 15 through one controllable clutch 18, the gear box 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, and the speed increase gearbox 14 increases the speed of the flexible transmission component 02 to the rated range of the generator 12 to improve the 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, and the two ends of the U-shaped connector 17 are respectively connected to the two controllable clutches 18, and the cylinder 34 controls the two controllable clutches 18 by driving the U-shaped connector 17.

[0050] Preferably, the drive unit provided in the present application further includes a small drive wheel 10 and a large drive wheel 11. The constant speed mechanism 15, the gearbox 16, the small drive wheel 10, and the large drive wheel 11 are sequentially drivingly engaged. The large drive wheel 11 is used to cooperate with a guide wheel set to achieve power transmission. During the energy release stage: The flexible transmission assembly 02 moves downward under the action of the gravitational potential energy of the heavy object block 04, driving a guide wheel set as the driving wheel set 41. The driving wheel set 41 transmits power to the large drive wheel 11 through the transmission shaft first, and then to the small drive wheel 10 that cooperates with it, achieving the purpose of increasing speed and reducing torque. Then, the power is transmitted to the gearbox 16 through the shaft. The clutch linkage mechanism is in the power generation position, and 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 rotational 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 from gravitational potential energy to electrical energy. During the energy storage stage: The clutch linkage mechanism is in the energy storage position, and the controllable clutch 18 connected to the energy storage motor 13 is closed. The energy storage motor 13 transmits power to the gearbox 16 through the controllable clutch 18, and then transmits the power to the guide wheel set of the driving wheel set 41 through the cooperating small drive wheel 10 and large drive wheel 11, causing the driving wheel set 41 to rotate in the reverse direction, driving the heavy object block 04 to rise, and completing the energy conversion process from electrical energy to gravitational potential energy. The clutch linkage mechanism can control the switching of the controllable clutch 18 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.

[0051] As Figure 7 shown, optionally, the gravity energy storage system provided in the present application further includes a tensioning module 26. The tensioning module 26 includes a bracket 22, and a tensioning slider 20, a tensioning rope 23, a tensioning guide wheel set 24, a first tensioning wheel 19, a second tensioning wheel 42, a slider guide rail 25, and a tensioning counterweight 21 that are all installed on the bracket 22. The slider guide rail 25 is horizontally arranged. The tensioning slider 20 is slidably engaged with the slider guide rail 25. The tensioning guide wheel set 24 is fixed to the tensioning slider 20. The flexible transmission assembly 02 cooperates with the tensioning guide wheel set 24. The first tensioning wheel 19 is fixed to the tensioning slider 20. 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 sequentially arranged in the length direction of the slider guide rail 25. One end of the tensioning rope 23 is fixed to the bracket 22, and the other end of the tensioning rope 23 bypasses the first tensioning wheel 19 and the second tensioning wheel 42 and is fixedly connected to the tensioning counterweight 21.

[0052] This keeps the flexible transmission assembly 02 always in a tensioned state, making it difficult for the flexible transmission assembly 02 to slip off from each guide wheel group, improving the safety and reliability of the gravity energy storage system provided by the present application. The tensioning counterweight 21 sags under the action of gravity. 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 assembly 02.

[0053] Preferably, the lower front guide wheel group 08 in the lower storage unit 33 at the bottom layer is the tensioning guide wheel group 24, and this front guide wheel group is indirectly installed on the building body 27 through the bracket 22. An auxiliary tensioning guide wheel group 31 is also preferably fixed on 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 the first direction. The upper storage unit and the lower storage unit are installed in the storage structure. In the first direction, the shaft 29 is arranged close to each front guide wheel group. The tensioning module 26 and the energy conversion module 28 are both preferably arranged in the shaft 29. The building module 06 can be a ground building or an underground building.

[0054] The gravity energy storage system provided by the present application can at least achieve the following technical effects: Through the fixed connection design between the flexible transmission assembly 02 and the heavy object block 04, the energy loss in non-energy conversion links is reduced, and the conversion efficiency between gravitational potential energy and electrical energy is improved. The clutch linkage mechanism realizes the rapid switching between the power generation and energy storage modes, meets the real-time peak shaving requirements of the power grid, and the system responds flexibly. The building module 06 adopts a modular multi-layer upper storage unit 32 and multi-layer lower storage unit 33 design. By increasing the number of layers or the height of the building body 27, the energy storage capacity can be linearly extended to the gigawatt-hour (GWh) level to adapt to the needs of power grids of different scales. The charging and discharging time control strategy is optimized, and energy storage is carried out during the low electricity price period and power generation is carried out during the peak period, reducing the electricity consumption cost. The constant speed mechanism 15 and the speed increasing gearbox 14 cooperate to control, ensuring stable power generation output (volatility < 5%), and reducing the power grid regulation pressure. Anti-falling structures, constant speed mechanisms 15 (with brakes) and speed increasing mechanisms are set up to prevent the heavy object from getting out of control; control safety: The automation system monitors key components (such as the chain state and anti-falling structure) in real time through multiple interlock logics and sensors to ensure the reliability of operation.

[0055] The gravity energy storage system provided by this application is used to achieve the following functions: Hierarchical scalable storage structure: The overall structure is divided into areas such as the upper storage unit 32 and the lower storage unit 33. The flexible transmission component 02 winds through the above-mentioned areas via the guide wheel groups at each corner, and a section of the endless chain hangs multiple weight blocks 04 to form a weight string unit 30. Not only can the upper storage unit 32 and the lower storage unit 33 be expanded in multiple layers, but the height of the building body 27 can also be expanded to increase the power generation amount. The energy storage capacity has strong scalability and relatively high power generation efficiency. When the weight block 04 string unit descends to the lower storage unit 33 due to gravitational potential energy, power can be generated, and the motor can reverse to lift the weight block 04 string unit 30 in the lower storage unit 33 to the upper storage unit 32 to complete gravity energy storage.

[0056] The weight block 04 is fixed to the flexible transmission component 02 to form a weight string unit 30 including multiple continuously arranged weight blocks 04, which can reduce the energy loss of the weight block 04 in non-convertible links and improve the overall efficiency of the system. At the same time, rollers 36 are installed on both sides of the weight block 04 and rollingly cooperate with the weight guide rail, which can significantly reduce the frictional resistance, improve the mechanical efficiency and reduce the energy consumption.

[0057] Efficient switching mode of the clutch linkage mechanism: The switching between the power generation mode and the energy storage mode is realized through the controllable clutch 18 and the clutch linkage mechanism. During power generation, the constant speed mechanism 15 is linked with the generator 12, and the gravitational potential energy drives the sprocket (the driving wheel group 41) to rotate and generate electricity; during energy storage, the energy storage motor 13 drives the sprocket in the reverse direction to lift the weight block 04 to store potential energy. The design of the constant speed mechanism 15 (with a brake) and the speed increasing mechanism, etc., prevents the weight from getting out of control; an automation system is also set up to ensure the operation reliability by monitoring key components (such as the chain state) in real time through multiple interlock logics and sensors.

[0058] Diverse adaptation ability of the transmission mechanism: The core transmission can adopt a sprocket mechanism, and at the same time be compatible with alternative solutions such as chutes, pulleys and belts, steel belts and steel cables, or gears, ratchets and gear belts to meet the requirements of different scenarios.

[0059] Optimization of the energy transmission path: The building module 06 serves as the core channel for power generation and energy storage. Combining with the path design of the winding flexible transmission component 02, the conversion efficiency of gravitational potential energy and electrical energy is optimized, and the loss during the energy transmission process is reduced.

[0060] Coordinated control of constant speed and speed increase: The constant speed mechanism 15 controls the rotation 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 increasing gearbox 14 increases the rotation speed of the guide wheel group serving as the driving wheel group 41 to the rated range of the generator 12 to improve the power generation efficiency.

[0061] Continuous operation and high adaptability: The reciprocating motion of the heavy weight block 04 on the flexible transmission component 02 supports uninterrupted charging and discharging, is applicable to distributed energy systems, and can match the peak-valley regulation requirements of the power grid to enhance the stability of the power system.

[0062] The tensioning gear train (including the first tensioning wheel and the second tensioning wheel) is configured with adjustable counterweights. By increasing or decreasing the counterweights, the tension of the chain or belt can be dynamically adjusted to ensure that the transmission system is always in the best tension state. The adaptive mechanism can cope with working conditions such as temperature changes and load fluctuations, reduce the risk of slack or overload of the flexible transmission component 02, and extend the service life of the equipment.

[0063] 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gravity energy storage system, characterized in that, Comprising a building module, as well as an energy conversion module and a heavy object transmission component module both installed on the building module, The heavy object transmission component module includes a flexible transmission assembly and a heavy object string unit. The heavy object string unit includes a plurality of heavy object blocks, and each of the heavy object blocks is fixed to the flexible transmission assembly, and each of the heavy object blocks is distributed in the extending direction of the flexible transmission assembly. The building module includes a building body, as well as an upper storage unit and a lower storage unit both installed on the building body. The upper storage unit and the lower storage unit are both used for storing the heavy object string unit. The energy conversion module is in transmission cooperation with the flexible transmission assembly. 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, and 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 assembly to move to achieve energy release.

2. The gravity energy storage system according to claim 1, wherein 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 each of the heavy object blocks located in the upper storage unit in the heavy object string unit is distributed in the first direction, and each of the heavy object blocks located in the lower storage unit in the heavy object string unit is distributed in the first direction. The first direction is horizontally arranged.

3. The gravity energy storage system according to claim 2, characterized in that, The upper storage unit includes an upper front guiding wheel group and an upper rear guiding wheel group arranged in the first direction. The lower storage unit includes a lower front guiding wheel group and a lower rear guiding wheel group arranged in the first direction. In the first direction, both the upper front guiding wheel group and the lower front guiding wheel group are arranged near one end of the building body, and both the upper rear guiding wheel group and the lower rear guiding wheel group are arranged near the other end of the building body. The flexible transmission assembly is in transmission cooperation with the upper front guiding wheel group, the upper rear guiding wheel group, the lower rear guiding wheel group and the lower front guiding wheel group in sequence.

4. The gravity energy storage system according to claim 3, wherein, The flexible transmission assembly includes two flexible transmission members arranged in the second direction. The heavy object block is a cylinder with an axial direction parallel to the second direction. The two ends of the heavy object block in the axial direction are respectively connected to the two flexible transmission members. The two flexible transmission members are in transmission cooperation with the upper front guiding wheel group, the upper rear guiding wheel group, the lower rear guiding wheel group and the lower front guiding wheel group in sequence. 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 are both detachably installed on the building body, each of the heavy object blocks is detachably installed on the flexible transmission assembly, and the flexible transmission assembly is detachably installed on the lower front guiding wheel group and the lower rear guiding wheel group.

6. The gravity energy storage system according to claim 2, wherein The building module includes a plurality of upper storage units arranged vertically and a plurality of lower storage units arranged vertically. Each of the upper storage units is located above each of the lower storage units. Each of the heavy object blocks in the heavy object string unit is used to be distributed in each of the upper storage units so that the heavy object blocks are distributed in a comb-like shape, and each of the heavy object blocks in the heavy object string unit is used to be distributed in each of the lower storage units so that the heavy object blocks are distributed in a comb-like shape.

7. The gravity energy storage system according to claim 6, wherein, Between the lowermost upper storage unit and the uppermost lower storage unit is a transition area. 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 a part of the heavy object string unit is located in the transition area after energy storage is completed; The length of the heavy object string unit is greater than the sum of the lengths of each of the lower storage units, so that a part of the heavy object string unit is located in the transition area after energy release is completed; or, the heavy object string unit is used to be arranged below the transition area 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. The constant speed motor is connected in transmission with the constant speed mechanism, and the transmission unit is in transmission cooperation with the flexible transmission assembly.

9. The gravity energy storage system according to claim 8, wherein, The energy conversion module includes two of the controllable clutches. The energy conversion module further includes a clutch linkage mechanism and a storage motor. The transmission unit includes a gearbox. The gearbox is connected in transmission with the constant speed mechanism through one of the controllable clutches, and the gearbox is connected in transmission with the storage motor through the other 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, It further includes a tensioning module. The tensioning module includes a bracket, and a tensioning slider, a tensioning rope, a tensioning guide wheel set, a first tensioning wheel, a second tensioning wheel, a slider guide rail, and a tensioning counterweight, all of which are installed 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 set is fixed to the tensioning slider. The flexible transmission assembly is matched with the tensioning guide wheel set. 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 bypasses the first tensioning wheel and the second tensioning wheel and is fixedly connected to the tensioning counterweight.

Images