Energy storage device

Abstract

The present invention provides an energy storage device, comprising: a weight assembly, including a weight body; a support assembly, arranged on a support base, the support assembly includes a lifting channel surrounded by a plurality of support columns, and the weight assembly can be arranged to move up and down in the lifting channel; an electric generator, arranged on the support assembly or on the support base, the electric generator is connected to the weight assembly to act as a motor to drive the weight assembly to move upward or to generate electricity as a generator during the downward movement of the weight assembly; the weight body and the support assembly are guided by a weight guide mechanism and a weight guide rail that cooperate with each other to guide the movement of the weight body, thereby solving the problem of shaking of the weight assembly due to vibration or external interference during the upward and downward movement of the weight assembly, and ensuring the position accuracy of the weight assembly. At the same time, the energy storage device of the present invention can be composed of multiple units in the form of a matrix, which is easy to modularly replicate, so as to flexibly set the energy storage capacity.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to an energy storage device. Background Art

[0002] With the introduction of the "30-60 Carbon Peak - Carbon Neutrality" strategy, renewable energy represented by thermal power generation will gradually be replaced by renewable energy represented by photovoltaic power generation and wind power generation. Renewable energy will be vigorously developed and is expected to become the main mode of power generation in the future.

[0003] In recent years, various energy storage technologies represented by pumped storage, new batteries, flywheels, compressed air, supercapacitors, etc. have received widespread attention. Among them, gravity energy storage solutions represented by pumped storage have the advantages of large capacity, low cost, and fast response speed, and are therefore widely used.

[0004] However, the construction of pumped storage power stations requires reliance on special geographical conditions. For example, the construction period required for building two reservoirs and dams is long, the initial investment is huge, and it can only be built in places with water sources. Its harsh site selection conditions restrict the development of large-scale energy storage.

[0005] In this regard, some people have proposed setting up a gravity energy storage device using a rope pulley group, wherein the gravity energy storage device includes a counterweight, a supporting device, an electric lifting device and a power generation device, wherein the counterweight is used to be lifted to a high altitude so as to convert the electrical energy into the increased gravitational potential energy of the counterweight; the supporting device includes a supporting column and a crossbeam mounted on the supporting column; the electric lifting device includes at least an electric motor, which drives the winding wheel to rotate to drive the wire body to pull the counterweight upward; the power generation device includes a generator, which is connected to the winding wheel via a transmission member to convert the gravitational potential energy of the counterweight into electrical energy when the counterweight descends.

[0006] However, the above-mentioned gravity energy storage device has the following disadvantages:

[0007] (1) The gravity energy storage device is prone to collide with the ground foundation when descending, thereby damaging the ground foundation.

[0008] (2) During the lifting process, heavy objects are easily shaken due to the influence of the external environment and system vibrations, causing collision and friction between the heavy objects and the supporting structure, and even causing the center of the supporting structure to shake, thus leading to safety accidents.

[0009] (3) Each heavy object energy storage unit is equipped with a motor and a transmission system on the top. This arrangement will inevitably lead to an increase in the load-bearing capacity of the supporting structure, an increase in the center of gravity, a complex structure, and a significant increase in the construction cost. The overall structure of the gravity energy storage device cannot be flexibly configured, and the energy storage capacity is easily limited. Summary of the invention

[0010] The main purpose of the present invention is to provide an energy storage device. On the first hand, the energy storage device of the present invention solves the problem of shaking of the weight assembly due to vibration or external interference during the up and down movement by setting a weight guide mechanism and a weight guide rail, thereby ensuring the position accuracy of the weight assembly during movement, preventing the weight body from shaking or vibrating, which causes the sling assembly to position inaccurately when grabbing and releasing the weight body, and increasing the stability and reliability of the energy storage device. On the second hand, the energy storage device of the present invention can be composed of multiple units in the form of a matrix, with a simple structure, easy modular replication, a wide range of applications, and can be flexibly composed of large units according to the size of the site. A large-scale gravity energy storage device is provided to facilitate flexible setting of the energy storage capacity of the energy storage device, and under the premise of low requirements on the geographical environment for construction, it realizes the wide application of large-scale energy storage in renewable energy power generation; on the third aspect, the energy storage device of the present invention is provided with a sling assembly to drive the weight assembly to move on the top of the support assembly, which is beneficial to the switching of the weight assembly between different energy storage units, thereby increasing the scalability and economy of the energy storage device and providing the possibility for flexible setting of the capacity of the energy storage device; on the fourth aspect, the energy storage device of the present invention is provided with a transmission assembly and a storage cloth mechanism to improve the movement accuracy of the sling assembly and provide the possibility for realizing the automation and unmanned operation of the weight assembly.

[0011] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an energy storage device, comprising: a weight assembly, comprising a weight body and a plurality of weight guide mechanisms arranged at intervals around the circumference of the weight body; a support assembly, arranged on a support base, the support assembly comprising a lifting channel surrounded by a plurality of support columns, the weight assembly being arranged to move up and down in the lifting channel, the support assembly comprising a plurality of weight guide rails located in the lifting channel and arranged at intervals around the circumference of the lifting channel; an electric generator, arranged on the support assembly or on the support base, the electric generator being connected to the weight assembly to act as a motor to drive the weight assembly to move upward or to act as a generator to generate electricity during the downward movement of the weight assembly; wherein the plurality of weight guide mechanisms are arranged one-to-one correspondingly to the plurality of weight guide rails to guide the movement of the weight body through the cooperation between the weight guide mechanisms and the weight guide rails.

[0012] Furthermore, the weight guide rail includes a first guide surface and two second guide surfaces respectively located on opposite sides of the first guide surface and connected to the first guide surface, each second guide surface is perpendicular to the first guide surface to jointly enclose a guide space with a rectangular cross-section; the weight guide mechanism includes a connecting frame and a plurality of rolling parts arranged on the connecting frame and located in the guide space, the plurality of rolling parts include a first rolling part and two second rolling parts respectively located on opposite sides of the first rolling part; the rotation axis of the first rolling part is parallel to the first guide surface and the outer peripheral surface of the first rolling part is in rolling contact with the first guide surface, and the rotation axis of each second rolling part is parallel to the corresponding second guide surface and the outer peripheral surface of each second rolling part is in rolling contact with the corresponding second guide surface.

[0013] Furthermore, the energy storage device includes a buffer assembly, which is arranged below the weight assembly to buffer the weight assembly moving close to the supporting base surface to avoid collision between the weight assembly and the supporting base surface.

[0014] Furthermore, the weight assembly also includes a tray disposed below the weight body and fixedly connected to the weight body, the tray being used to contact the buffer assembly when the weight assembly moves downward to approach the buffer assembly; and / or the buffer assembly includes a compression spring.

[0015] Furthermore, the support assembly also includes a weight support mechanism arranged at the upper end of the lifting channel, the weight support mechanism includes a support position for supporting the weight assembly when the weight assembly moves upward to the highest position and a avoidance position for avoiding the weight assembly when the weight assembly moves downward, and the weight support mechanism can be switchably arranged between the support position and the avoidance position.

[0016] Furthermore, the energy storage device includes a sling assembly, which is located on the support assembly and at least a portion of the sling assembly is movably arranged relative to the support assembly. The sling assembly is used to connect with the weight assembly to drive a portion of the sling assembly to move downward through the weight assembly or to drive the weight assembly to move upward through the sling assembly.

[0017] Furthermore, the sling assembly includes a sling, a sling rope and a pulley assembly. The sling is used to sling the heavy object assembly. The pulley assembly is movably arranged relative to the support assembly. The upper end of the sling rope is used to connect to the pulley assembly, and the lower end of the sling rope is used to connect to the sling.

[0018] Furthermore, the sling assembly includes: a connecting rod and a sling guide mechanism arranged on the outside of the connecting rod, and the two ends of the connecting rod are respectively connected to the sling and the sling rope; the support assembly includes a sling guide rail, and the sling guide rail is spaced apart from the sling assembly; the sling guide mechanism is arranged corresponding to the sling guide rail to guide the movement of the connecting rod through the cooperation between the sling guide rail and the sling guide mechanism.

[0019] Furthermore, the energy storage device includes a hanger assembly, which is arranged above the support assembly for installing the hanger assembly.

[0020] Furthermore, the support assembly includes multiple lifting channels, the energy storage device includes multiple weight assemblies, and the multiple weight assemblies are arranged in the multiple lifting channels one by one; the hanger assembly is movably arranged on the support assembly to drive the sling assembly to move above different weight assemblies to lift different weight assemblies.

[0021] Furthermore, the hanger assembly includes a hanger body and a horizontal driving component arranged on the hanger body, and the horizontal driving component is drivingly connected to the hanger body to drive the hanger body to move horizontally above the support assembly to above different weight assemblies.

[0022] Furthermore, a slider is provided below the hanger body, and a linear guide rail slidably connected to the slider is provided above the support assembly, so that the movement of the hanger body is guided by the slider and the linear guide rail.

[0023] Furthermore, the electric generator is arranged on the supporting base surface of the supporting assembly or on the supporting assembly, and the energy storage device includes a transmission assembly, which is located between the electric generator and the sling assembly to connect the two.

[0024] Furthermore, the transmission assembly includes a winch and a rope, a portion of the rope is wound around the winch, a free end of the rope is connected to the sling assembly, and the electric generator is drivingly connected to the winch to drive the winch to rotate.

[0025] Further, the transmission assembly includes at least one cloth storage mechanism, which includes: a cloth storage rack, which is arranged on the movement path of the rope; a plurality of rollers, which are arranged on the cloth storage rack at intervals along a first predetermined direction, and each roller is rotatably arranged to allow the rope to pass around; a buffer roller, which is located between any two adjacent rollers among the plurality of rollers, and the buffer roller is rotatable and reciprocatingly arranged on the cloth storage rack along a second predetermined direction to allow the rope to pass around; an actuator, which is connected to the buffer roller to drive the buffer roller to move in the second predetermined direction, so that when the hanger assembly moves with the hanger assembly, the actuator also drives the buffer roller to move, so that the rope is always in a straightened state; wherein the first predetermined direction and the second predetermined direction are perpendicular to each other.

[0026] Further, the transmission assembly includes at least one cloth storage mechanism, which includes: a cloth storage rack, which is arranged on the movement path of the rope; a plurality of rollers, which are arranged on the cloth storage rack at intervals along a first predetermined direction, and each roller is rotatably arranged to allow the rope to pass around; a plurality of buffer rollers, which are arranged on the cloth storage rack at intervals along the first predetermined direction, and each buffer roller is located between two adjacent rollers, and each buffer roller is rotatable and can be reciprocated along a second predetermined direction; a plurality of actuators, which are driven and connected to the plurality of buffer rollers in a one-to-one correspondence to drive the corresponding buffer rollers to move along the second predetermined direction, so that when the hanger assembly moves with the hanger assembly, the plurality of actuators also drive the plurality of buffer rollers to move respectively, so that the rope is always in a straightened state; wherein the first predetermined direction and the second predetermined direction are perpendicular to each other.

[0027] By applying the technical solution of the present invention, the energy storage device of the present invention comprises: a weight assembly; a support assembly, which is arranged on a support base, the support assembly comprises a lifting channel surrounded by a plurality of support columns, and the weight assembly is arranged to move up and down in the lifting channel; an electric generator, which is arranged on the support assembly or on the support base, and the electric generator is connected to the weight assembly to act as a motor to drive the weight assembly to move upward or to generate electricity as a generator during the downward movement of the weight assembly; wherein the weight assembly comprises a weight body and a plurality of weight guide mechanisms arranged at intervals around the circumference of the weight body, the support assembly comprises a plurality of weight guide rails located in the lifting channel and arranged at intervals around the circumference of the lifting channel, the plurality of weight guide mechanisms and the plurality of weight guide rails are arranged one by one, so as to guide the movement of the weight body through the cooperation between the weight guide mechanisms and the weight guide rails, avoid the shaking of the weight assembly due to vibration or external interference during the upward and downward movement, ensure the position accuracy of the weight assembly during the movement, prevent the problem of inaccurate positioning of the sling assembly when grabbing and releasing the weight body due to shaking or vibration of the weight body, and increase the stability and reliability of the energy storage device. In addition, the energy storage device of the present invention has low requirements on the natural geographical environment, does not need to rely on the regulation of mountains and water sources, and can be flexibly set in any open environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 A front view of a first embodiment of an energy storage device according to the present invention is shown;

[0030] Figure 2 A front view of a second embodiment of an energy storage device according to the present invention is shown;

[0031] Figure 3 A front view of an embodiment of a support assembly of an energy storage device according to the present invention is shown;

[0032] Figure 4 A front view of a first embodiment of a weight assembly of an energy storage device according to the present invention is shown;

[0033] Figure 5 A front view of a first embodiment of a spreader assembly of an energy storage device according to the present invention is shown;

[0034] Figure 6 A front view of a second embodiment of a weight assembly of an energy storage device according to the present invention is shown;

[0035] Figure 7 A side view of a second embodiment of a weight assembly of an energy storage device according to the present invention is shown;

[0036] Figure 8 A front view of a second embodiment of a spreader assembly of an energy storage device according to the present invention is shown;

[0037] Fig. 9 A schematic diagram showing the coordination of the weight guide rail and the weight guide mechanism of the energy storage device according to the present invention is shown;

[0038] Fig.10 Shows Fig. 9 The matching schematic diagram shown is a partial enlarged view at A;

[0039] Fig.11 A front view of an embodiment of a hanger assembly of an energy storage device according to the present invention is shown;

[0040] Fig.12 Shows Figure 1 The energy storage device shown is a front view without the weight assembly and the support assembly;

[0041] Fig.13 Shows Figure 2 The energy storage device shown is a front view without the weight assembly and the support assembly;

[0042] Fig.14 A front view of a first embodiment of a cloth storage mechanism of a transmission assembly of an energy storage device according to the present invention is shown;

[0043] Fig.15 A front view of a second embodiment of a cloth storage mechanism of a transmission assembly of an energy storage device according to the present invention is shown.

[0044] The above drawings include the following reference numerals:

[0045] 1. Weight assembly; 11. Weight body; 12. Tray; 13. Weight guide mechanism; 130. Connecting frame; 131. First rolling part; 132. Second rolling part; 14. Hanging frame;

[0046] 2. Support assembly; 20. Lifting channel; 21. Support column; 22. Crossbeam; 23. Reinforcement rib; 24. Pull rod; 25. Weight guide rail; 251. First guide surface; 252. Second guide surface; 26. Weight support mechanism; 27. Linear guide rail;

[0047] 3. Spreader assembly; 31. Spreader; 32. Spreader rope; 33. Pulley assembly; 331. Spreader movable pulley; 332. Spreader fixed pulley; 34. Connecting rod; 35. Spreader guide mechanism;

[0048] 4. Buffer component;

[0049] 5. Hanger assembly; 51. Hanger body; 52. Horizontal drive component; 53. Slider;

[0050] 6. Transmission assembly; 61. Twisted rope; 62. Speed ​​reducer; 63. Capstan; 64. First fixed pulley; 65. Cloth storage mechanism; 650. Cloth storage rack; 651. Over roller; 652. Buffer roller; 653. Actuator; 66. Second fixed pulley;

[0051] 7. Electric generator. DETAILED DESCRIPTION

[0052] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0053] like Figures 1 to 15 As shown, the present invention provides an energy storage device, including: a weight assembly 1, including a weight body 11 and a plurality of weight guide mechanisms 13 arranged at intervals around the circumference of the weight body 11; a support assembly 2, arranged on a support base, the support assembly 2 including a lifting channel 20 surrounded by a plurality of support columns 21, the weight assembly 1 can be arranged to move up and down in the lifting channel 20, the support assembly 2 including a plurality of weight guide rails 25 located in the lifting channel 20 and arranged at intervals around the circumference of the lifting channel 20; an electric generator 7, arranged on the support assembly 2 or on the support base, the electric generator 7 is connected to the weight assembly 1, so as to act as a motor to drive the weight assembly 1 to move upward or to act as a generator to generate electricity during the downward movement of the weight assembly 1; wherein the plurality of weight guide mechanisms 13 and the plurality of weight guide rails 25 are arranged one by one correspondingly, so as to guide the movement of the weight body 11 through the cooperation between the weight guide mechanisms 13 and the weight guide rails 25.

[0054] The energy storage device of the present invention comprises: a weight assembly 1; a support assembly 2, which is arranged on a support base, the support assembly 2 comprises a lifting channel 20 surrounded by a plurality of support columns 21, and the weight assembly 1 is arranged to be movable up and down in the lifting channel 20; an electric generator 7, which is arranged on the support assembly 2 or on the support base, and the electric generator 7 is connected to the weight assembly 1 to act as an electric motor to drive the weight assembly 1 to move upward or to act as a generator to generate electricity during the downward movement of the weight assembly 1; wherein the weight assembly 1 comprises a weight body 11 and a plurality of weight guide mechanisms 13 arranged at intervals around the circumference of the weight body 11, and the support assembly 2 comprises a plurality of weight guide mechanisms 13 arranged at intervals around the circumference of the weight body 11, and a plurality of weight guide mechanisms 13 are ... A plurality of weight guide rails 25 are arranged in intervals in the lifting passage 20 and around the circumference of the lifting passage 20, and a plurality of weight guide mechanisms 13 are arranged one-to-one with the plurality of weight guide rails 25, so as to guide the movement of the weight body 11 through the cooperation between the weight guide mechanism 13 and the weight guide rails 25, thereby avoiding the shaking of the weight assembly 1 due to vibration or external interference during the up and down movement, ensuring the position accuracy of the weight assembly 1 during the movement, and preventing the weight body 11 from shaking or vibrating, which may cause the sling assembly 3 to have inaccurate positioning when grasping and releasing the weight body 11, thereby increasing the stability and reliability of the energy storage device. In addition, the energy storage device of the present invention has low requirements for the natural geographical environment, does not need to rely on the regulation of mountains and water sources, and can be flexibly set in any open environment.

[0055] Specifically, in the support assembly 2, a plurality of support columns 21 are arranged at intervals around the weight assembly 1, and the lower end of each support column 21 is fixed on a support base surface (such as a foundation, which needs to be filled with concrete to ensure its stability). Two adjacent support columns 21 are connected by at least one horizontally arranged beam 22, and inclined reinforcement ribs 23 are arranged between the connected support columns 21 and the beams 22. Inclined pull rods 24 are also arranged at the diagonals of a rectangle jointly enclosed by two adjacent support columns 21 and two adjacent beams 22 among the multiple beams 22 located between the two adjacent support columns 21, so as to jointly form a stable support frame structure.

[0056] The weight guide rail 25 is connected to the cross beam 22 of the support assembly 2 so as to transmit the force of each weight guide mechanism 13 to each steel structure of the support assembly 2 through the cross beam 22, thereby ensuring the smooth operation of the weight body 11.

[0057] In at least one embodiment of the present invention, the number of weight guide rails 25 and weight guide mechanisms 13 are both four, and the four weight guide mechanisms 13 are respectively arranged on the four circumferential sides of the weight body 11 of the rectangular structure, and the four weight guide rails 25 are arranged one by one toward the four weight guide mechanisms 13, and each weight guide mechanism 13 is used to contact with the corresponding weight guide mechanism 13 to guide and limit it.

[0058] like Fig. 9 and Fig.10 As shown, the weight guide rail 25 is a "C"-shaped channel steel guide rail, and the weight guide rail 25 includes a first guide surface 251 and two second guide surfaces 252 respectively located on opposite sides of the first guide surface 251 and connected to the first guide surface 251. Each second guide surface 252 is perpendicular to the first guide surface 251 to jointly enclose a guide space with a rectangular cross-section. The opening of the guide space is set toward the weight body 11, and at least a part of the weight guide mechanism 13 is embedded in the guide space and contacts with the inner wall surface of the weight guide rail 25; the weight guide mechanism 13 includes a connecting frame 130 and a plurality of rolling parts arranged on the connecting frame 130 and located in the guide space, the plurality of rolling parts include a first rolling part 131 and two second rolling parts 132 respectively located on opposite sides of the first rolling part 131; the rotation axis of the first rolling part 131 is parallel to the first guide surface 251 and the outer peripheral surface of the first rolling part 131 is in rolling contact with the first guide surface 251, and the rotation axes of the two second rolling parts 132 are both parallel to the second guide surface 252 and the outer peripheral surface of each second rolling part 132 is in rolling contact with the corresponding second guide surface 252. In this way, the weight guide rail 25 and the weight guide mechanism 13 form rolling friction during the movement of the weight body 11, so as to play a limiting role in the first horizontal direction perpendicular to the first guide surface 251 and the second horizontal direction perpendicular to the second guide surface 252.

[0059] Specifically, the rolling part is a cam bearing follower.

[0060] The energy storage device of the present invention includes a buffer component 4, which is arranged below the weight component 1 to buffer the weight component 1 that moves close to the supporting base surface to avoid collision between the weight component 1 and the supporting base surface, thereby preventing the weight component 1 from damaging the supporting base surface, and solving the problem in the prior art that the gravity energy storage device is prone to collision with the ground foundation when descending.

[0061] like Figure 4 , Figure 6 and Figure 7 As shown, the weight assembly 1 also includes a tray 12 disposed below the weight body 11 and fixedly connected to the weight body 11, the tray 12 is used to contact the buffer assembly 4 when the weight assembly 1 moves downward to approach the buffer assembly 4; and / or the buffer assembly 4 includes a compression spring.

[0062] like Figure 4 , Figure 6 and Figure 7 As shown, the weight assembly 1 includes a weight body 11 and a hanging frame 14 fixedly arranged above or on the side of the weight body 11 , and the hanger assembly 3 is connected to the weight body 11 via the hanging frame 14 .

[0063] like Figure 4 In the first embodiment of the weight assembly of the energy storage device of the present invention shown in the figure, the weight body 11 is a complete rectangular structure, the tray 12 is fixedly installed below the weight body 11 for contacting with the buffer assembly 4, and the hanging frame 14 is fixedly installed above the weight body 11, so as to drive the weight body 11 to move by hanging the hanging frame 14, thereby driving the tray 12 to move; wherein, each weight guide mechanism 13 is arranged on the peripheral side of the weight body 11 and is fixedly connected to the weight body 11.

[0064] like Figure 6 and Figure 7 In the second embodiment of the weight assembly of the energy storage device of the present invention shown in FIG, the weight body 11 is a rectangular structure formed by stacking a plurality of separate rectangular blocks (such as bricks), a tray 12 is arranged below the weight body 11 to support the weight body 11 and contact the buffer assembly 4, a plurality of hanging frames 14 are arranged at intervals around the circumferential side of the weight body 11, and each hanging frame 14 is connected to the tray 12, so that the tray 12 can be driven to move by lifting the hanging frame 14, thereby driving the weight body 11 to move; wherein each weight guide mechanism 13 is arranged on the hanging frame 14 and fixedly connected to the corresponding hanging frame 14.

[0065] like Figure 3 As shown, the support assembly 2 also includes a weight support mechanism 26 arranged at the upper end of the lifting channel 20, the weight support mechanism 26 includes a support position for supporting the weight assembly 1 when the weight assembly 1 moves upward to the highest position and a avoidance position for avoiding the weight assembly 1 when the weight assembly 1 moves downward, and the weight support mechanism 26 is switchably arranged between the support position and the avoidance position.

[0066] like Figure 1 , Figure 2 , Figure 5 , Figure 8 , Fig.12 and Fig.13 As shown, the energy storage device includes a sling assembly 3, which is located on the support assembly 2 and at least a portion of the sling assembly 3 is movably arranged relative to the support assembly 2. The sling assembly 3 is used to connect with the weight assembly 1 to drive a portion of the sling assembly 3 to move downward through the weight assembly 1 or to drive the weight assembly 1 to move upward through the sling assembly 3.

[0067] like Figure 5 and Figure 8As shown, the sling assembly 3 includes a sling 31, a sling rope 32 and a pulley assembly 33. The sling 31 is used to sling the weight assembly 1. The pulley assembly 33 is movably arranged relative to the support assembly 2. The upper end of the sling rope 32 is used to connect to the pulley assembly 33, and the lower end of the sling rope 32 is used to connect to the sling 31.

[0068] Specifically, the sling 31 is a gripper-type sling with an automatic opening and closing function. The gripper-type sling can automatically grab or release the sling frame 14 after moving into position to drive the heavy object body 11 to be lifted to the top of the lifting channel 20 .

[0069] Specifically, the sling assembly 3 includes: a connecting rod 34 and a sling guide mechanism 35 arranged on the outside of the connecting rod 34, and the two ends of the connecting rod 34 are respectively connected to the sling 31 and the sling rope 32; the support assembly 2 includes a sling guide rail, and the sling guide rail is spaced apart from the sling assembly 3; the sling guide mechanism 35 is arranged corresponding to the sling guide rail to guide the movement of the connecting rod 34 through the cooperation between the sling guide rail and the sling guide mechanism 35.

[0070] Preferably, the sling guide rail is the weight guide rail 25 in the support assembly 2, and the sling guiding mechanism 35 is used in conjunction with the weight guide rail 25 in the support assembly 2 to ensure the accuracy of the position of the sling 31 during the movement, to avoid the inability to grasp the lifting frame 14 due to excessive swinging, and at the same time, it also saves the cost of setting up an additional sling guide rail; wherein, the structure of the sling guiding mechanism 35 is similar to that of the weight guide mechanism 13, so as to form rolling friction with the weight guide rail 25 during the movement of the sling 31, so as to limit the sling assembly 3 in the first horizontal direction perpendicular to the first guide surface 251 and in the second horizontal direction perpendicular to the second guide surface 252.

[0071] like Figure 5 The first embodiment of the spreader assembly 3 is shown, and the spreader assembly 3 is used to grab Figure 4 In the heavy object assembly 1 shown, the number of the connecting rod 34 and the sling 31 in the sling assembly 3 are both one, and a plurality of sling guide mechanisms 35 are arranged around the circumference of the connecting rod 34. The sling rope 32, the connecting rod 34 and the sling 31 are connected in sequence along the vertical direction, and the sling 31 is used to grab the sling frame 14 located above the heavy object body 11.

[0072] like Figure 8 The second embodiment of the spreader assembly 3 shown is used to grab Figure 6 and 7In the shown heavy object assembly 1, there are multiple connecting rods 34 and slings 31 in the sling assembly 3, and a sling guide mechanism 35 is provided on the outer side of each connecting rod 34. The multiple slings 31 are respectively connected to the lower ends of the multiple connecting rods 34 in a one-to-one correspondence, and the upper ends of the multiple connecting rods 34 are connected by an intermediate cross bar, and the middle part of the intermediate cross bar is connected to the lower end of the sling rope 32. The multiple slings 31 are respectively used to grab the multiple sling frames 14 arranged at intervals on the circumferential side around the heavy object body 11.

[0073] like Figure 1 , Figure 2 , Figures 11 to 13 As shown, the energy storage device includes a hanger assembly 5 , which is arranged above the support assembly 2 for installing the hanger assembly 3 .

[0074] like Figure 1 As shown, the support assembly 2 includes a plurality of lifting channels 20, and the energy storage device includes a plurality of weight assemblies 1, and the plurality of weight assemblies 1 are arranged one by one in the plurality of lifting channels 20; the hanger assembly 5 is movably arranged on the support assembly 2 to drive the sling assembly 3 to move above different weight assemblies 1 to lift different weight assemblies 1.

[0075] Specifically, an energy storage unit in the energy storage device of the present invention is composed of a weight component 1, a lifting channel 20 and a buffer component 4. The energy storage device of the present invention can be a large-scale gravity energy storage device composed of multiple independent energy storage units according to the size of the site, so as to flexibly set the energy storage capacity of the energy storage device, thereby flexibly configuring the number of energy storage units according to the energy storage capacity. It has a simple structure, is easy to modularize and replicate, and has a wide range of applications. Under the premise of low requirements on the geographical environment in which it is constructed, it realizes the wide application of large-scale energy storage in renewable energy power generation, which is beneficial to the storage and utilization of gravitational potential energy.

[0076] When the number of energy storage units is increased, all energy storage units can share a support assembly 2 including multiple lifting channels 20, and multiple energy storage units located in the same row can share a sling assembly 3, a hanger assembly 5, a transmission assembly 6 and an electric generator 7. The combination of a sling assembly 3 and a hanger assembly 5 can move between multiple energy storage units in the same row under the drive of a transmission assembly 6 and an electric generator 7 to reach above the lifting channel 20 of any energy storage unit to lift the corresponding weight assembly 1 and move synchronously with it.

[0077] In this way, since the longitudinal and lateral expansion of the steel frame structure increases the overall projected area of ​​the steel structure, the rigidity and stability of the steel frame structure are increased, which can achieve the effect of saving steel. When the number of energy storage units is expanded in the same row, there is no need to increase the number of hanger assemblies 3, hanger assemblies 5, transmission assemblies 6 and electric generators 7, thereby achieving the purpose of reducing production costs and reducing the complexity of the energy storage device.

[0078] For example, when the energy storage device includes sixteen energy storage units, and these sixteen energy storage units are arranged in a 4X4 matrix form, it is only necessary to set up a support assembly 2 including 16 lifting channels 20, four hoisting assemblies 3, four hanger assemblies 5, four transmission assemblies 6 and four electric generators 7.

[0079] Specifically, the hanger assembly 5 includes a hanger body 51 and a horizontal driving component 52 disposed on the hanger body 51, and the horizontal driving component 52 is drivingly connected to the hanger body 51 to drive the hanger body 51 to move horizontally above the support assembly 2 to above different weight assemblies 1. In this way, the hanger assembly 5 is installed above the support assembly 2 along a predetermined horizontal direction, and can drive the sling assembly 3 to move forward and backward along a predetermined horizontal direction to the top of the lifting channel 20 of each energy storage unit, so that the sling assembly 3 can lift different weights.

[0080] The horizontal driving component 52 is a motor.

[0081] like Fig.11 As shown, a slider 53 is provided below the hanger body 51, and a linear guide rail 27 is provided above the support assembly 2, which is slidably connected to the slider 53 and extends along the movement direction of the hanger body 51, so as to guide the movement of the hanger body 51 through the sliding connection between the slider 53 and the linear guide rail 27.

[0082] like Figure 1 , Figure 2 , Fig.12 and Fig.13 As shown, the electric generator 7 is arranged on the supporting base surface of the supporting assembly 2 or on the supporting assembly 2, and the energy storage device includes a transmission assembly 6, which is located between the electric generator 7 and the sling assembly 3 to connect the two through transmission.

[0083] Among them, the transmission assembly 6 includes a winch 63 and a rope 61, a part of the rope 61 is wound around the winch 63, the free end of the rope 61 is connected to the sling assembly 3, the electric generator 7 is driven and connected to the winch 63 to drive the winch 63 to rotate, and the rope 61 needs to use a rope with a safety factor as large as possible to avoid failure.

[0084] Specifically, a reducer 62 is provided between the electric generator 7 and the winch 63. The reducer 62 and the winch 63 may be directly connected without other transmission mechanisms or may be connected through transmission mechanisms such as chain drive or belt drive.

[0085] like Figure 1 As shown, the electric generator 7 is arranged on the supporting base surface of the supporting assembly 2, and a cloth storage mechanism 65 and a plurality of fixed pulleys are arranged on the moving path of the rope 61. The cloth storage mechanism 65 is used to ensure that the rope 61 is always in a straightened state. The plurality of fixed pulleys include a first fixed pulley 64 and a second fixed pulley 66. The first fixed pulley 64 is located between the winch 63 and the cloth storage mechanism 65, and the second fixed pulley 66 is located between the cloth storage mechanism 65 and the sling assembly 3.

[0086] like Fig.12 As shown, when the electric generator 7 is arranged on the supporting base surface of the supporting assembly 2, the pulley assembly 33 of the sling assembly 3 includes a sling movable pulley 331 and a sling fixed pulley 332, the sling fixed pulley 332 is fixed above the hanger assembly 5, the sling movable pulley 331 is movably arranged below the sling fixed pulley 332, the first end of the sling rope 61 is fixed on the capstan 63, the second end of the sling rope 61 is fixed on the hanger assembly 5 after passing around the sling fixed pulley 332 and the sling movable pulley 331, and the rotating shaft of the sling movable pulley 331 is connected to the sling rope 32 so as to move up and down synchronously with the sling rope 32.

[0087] like Fig.13 As shown, when the electric generator 7 is arranged above the hanger assembly 5, the pulley assembly 33 of the hanger assembly 3 includes a hanger movable pulley 331, and the hanger movable pulley 331 is movably arranged below the electric generator 7. The first end of the rope 61 is fixed on the capstan 63, and the second end of the rope 61 is fixed on the hanger assembly 5 after passing around the hanger movable pulley 331. The rotating shaft of the hanger movable pulley 331 is connected to the rope 32 so as to move up and down synchronously with the rope 32.

[0088] like Figure 1 As shown, the two energy storage units share a sling assembly 3, a hanger assembly 5, a transmission assembly 6 and an electric generator 7. At this time, the sling assembly 3 needs to move a distance L and position it in order to lift the heavy component 1 of the two energy storage units. In order to ensure the constant position of the sling 31 and the smooth operation of the hanger assembly 5 and to ensure that the tension of the rope 61 is relatively stable during the movement of the hanger assembly 5 and will not fluctuate greatly or even cause looseness, a cloth storage mechanism 65 needs to be added to ensure that the rope 61 is always in a straightened state.

[0089] like Fig.14In the first embodiment of the cloth storage mechanism 65 shown, the transmission assembly 6 includes at least one cloth storage mechanism 65, which includes: a cloth storage rack 650, which is arranged on the movement path of the rope 61; a plurality of rollers 651, which are arranged on the cloth storage rack 650 at intervals along a first predetermined direction, and each roller 651 can be rotatably arranged to allow the rope 61 to pass around; a buffer roller 652, which is located between any two adjacent rollers 651 among the plurality of rollers 651, and the buffer roller 652 is rotatable and reciprocatably arranged on the cloth storage rack 650 along a second predetermined direction to allow the rope 61 to pass around; an actuator 653, which is drivingly connected to the buffer roller 652 to drive the buffer roller 652 to move in the second predetermined direction, so that when the hanger assembly 3 moves with the hanger assembly 5, the actuator 653 also drives the buffer roller 652 to move, so that the rope 61 is always in a straightened state; wherein the first predetermined direction and the second predetermined direction are perpendicular to each other.

[0090] Optionally, the actuator 653 is an air cylinder, an oil cylinder, a linear motor, etc. The actuator 653 and the buffer roller 652 can be directly connected or connected through a gear rack mechanism and a lead screw mechanism.

[0091] Specifically, a detection component for detecting the movement position and movement distance of the hanger component 5 is provided on the support component 2. The detection component transmits the detection result to the controller. When the controller determines that the hanger component 5 moves a predetermined distance, it will send an instruction to the actuator 653 to drive the buffer roller 652 to move half of the predetermined distance, so that the rope 61 is always in a straightened state.

[0092] like Fig.15 In the second embodiment of the cloth storage mechanism 65 shown in FIG. 1 , the transmission assembly 6 includes at least one cloth storage mechanism 65, which includes: a cloth storage rack 650, which is arranged on the moving path of the rope 61; a plurality of rollers 651, which are arranged on the cloth storage rack 650 at intervals along a first predetermined direction, and each of the rollers 651 can be rotatably arranged to allow the rope 61 to pass around; a plurality of buffer rollers 652, which are arranged on the cloth storage rack 650 at intervals along the first predetermined direction, and each of the buffer rollers 652 is located between two adjacent ones. Between the rollers 651, each buffer roller 652 is rotatable and reciprocatingly arranged along the second predetermined direction; multiple actuators 653 are driven and connected with the multiple buffer rollers 652 in a one-to-one correspondence to drive the corresponding buffer rollers 652 to move along the second predetermined direction, so that when the sling assembly 3 moves with the hanger assembly 5, the multiple actuators 653 also drive the multiple buffer rollers 652 to move respectively, so that the rope 61 is always in a straightened state; wherein the first predetermined direction and the second predetermined direction are perpendicular to each other.

[0093] Specifically, the first predetermined direction is a horizontal direction, and the second predetermined direction is a vertical direction; or, the first predetermined direction is a vertical direction, and the second predetermined direction is a vertical-horizontal direction.

[0094] In addition, when there are a large number of energy storage units in the same row, the moving distance of the hanger assembly 5 is large, and one cloth storage mechanism 65 is difficult to achieve the long-distance cloth storage function, multiple cloth storage mechanisms 65 can be connected in series to increase the buffer distance.

[0095] The working principle of the energy storage device of the present invention is as follows:

[0096] Energy storage process: that is, the process of converting electrical energy into gravitational potential energy when electricity consumption is low or power generation is excessive. The specific process is that the sling assembly 3 grabs the hanging frame 14 of the heavy object assembly 1 on the buffer assembly 4 at the bottom of the lifting channel 20, and the electric generator 7 is started as a motor to drive the grabbed heavy object assembly 1 to rise in the lifting channel 20 through the transmission assembly 6 and the sling assembly 3. When the heavy object assembly 1 rises, the electrical energy consumed by the electric generator 7 will be converted into the gravitational potential energy of the heavy object assembly 1 for energy storage. When the heavy object assembly 1 reaches the top of the lifting channel 20, the heavy object support mechanism 26 will switch to the supporting position to support the heavy object assembly 1; then the sling 31 of the sling assembly 3 releases the hanging frame 14 of the heavy object assembly 1, and the hanger assembly 5 drives the sling assembly 3 to move horizontally to the top of the lifting channel 20 of the next energy storage unit. The electric generator 7 drives the sling assembly 3 to move downward to the top of the corresponding heavy object assembly 1 through the transmission assembly 6, and repeats the above energy storage action.

[0097] Power generation process: that is, the process of converting the stored gravitational potential energy into electrical energy during peak electricity consumption. The specific process is that the sling assembly 3 grabs the lifting frame 14 of the weight assembly 1 on the weight support mechanism 26 at the top of the lifting channel 20, the weight support mechanism 26 switches to the avoidance position, the electric generator 7 switches to the generator mode, and the weight assembly 1 moves downward under the action of gravity to drive the generator to rotate to convert the gravitational potential energy into electrical energy for power generation; then the sling 31 of the sling assembly 3 releases the lifting frame 14 of the weight assembly 1, the electric generator 7 drives the sling assembly 3 to move upward to the top of the lifting channel 20 through the transmission assembly 6, and the hanger assembly 5 drives the sling assembly 3 to move horizontally to the top of the lifting channel 20 of the next energy storage unit, and repeats the above energy storage action.

[0098] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0099] The energy storage device of the present invention comprises: a weight assembly 1; a support assembly 2, which is arranged on a support base, the support assembly 2 comprises a lifting channel 20 surrounded by a plurality of support columns 21, and the weight assembly 1 is arranged to be movable up and down in the lifting channel 20; an electric generator 7, which is arranged on the support assembly 2 or on the support base, and the electric generator 7 is connected to the weight assembly 1 to act as an electric motor to drive the weight assembly 1 to move upward or to act as a generator to generate electricity during the downward movement of the weight assembly 1; wherein the weight assembly 1 comprises a weight body 11 and a plurality of weight guide mechanisms 13 arranged at intervals around the circumference of the weight body 11, and the support assembly 2 comprises a plurality of weight guide mechanisms 13 arranged at intervals around the circumference of the weight body 11, and a plurality of weight guide mechanisms 13 are ... A plurality of weight guide rails 25 are arranged in intervals in the lifting passage 20 and around the circumference of the lifting passage 20, and a plurality of weight guide mechanisms 13 are arranged one-to-one with the plurality of weight guide rails 25, so as to guide the movement of the weight body 11 through the cooperation between the weight guide mechanism 13 and the weight guide rails 25, thereby avoiding the shaking of the weight assembly 1 due to vibration or external interference during the up and down movement, ensuring the position accuracy of the weight assembly 1 during the movement, and preventing the weight body 11 from shaking or vibrating, which may cause the sling assembly 3 to have inaccurate positioning when grasping and releasing the weight body 11, thereby increasing the stability and reliability of the energy storage device. In addition, the energy storage device of the present invention has low requirements for the natural geographical environment, does not need to rely on the regulation of mountains and water sources, and can be flexibly set in any open environment.

[0100] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0101] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0102] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0103] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0104] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy storage device, characterized in that: include: A weight assembly (1) comprises a weight body (11) and a plurality of weight guide mechanisms (13) arranged at intervals around the circumference of the weight body (11); A support assembly (2) is arranged on a support base, the support assembly (2) comprises a lifting channel (20) surrounded by a plurality of support columns (21), the weight assembly (1) is arranged in the lifting channel (20) to be movable up and down, and the support assembly (2) comprises a plurality of weight guide rails (25) located in the lifting channel (20) and arranged at intervals around the circumference of the lifting channel (20); The support assembly (2) further comprises a weight support mechanism (26) arranged at the upper end of the lifting channel (20), the weight support mechanism (26) comprising a support position for supporting the weight assembly (1) when the weight assembly (1) moves upward to the highest position and a avoidance position for avoiding the weight assembly (1) when the weight assembly (1) moves downward, and the weight support mechanism (26) is switchably arranged between the support position and the avoidance position; A sling assembly (3), the sling assembly (3) being located on the support assembly (2) and at least a portion of the sling assembly (3) being movably arranged relative to the support assembly (2), the sling assembly (3) being used to be connected to the weight assembly (1) so as to drive a portion of the sling assembly (3) to move downwards through the weight assembly (1) or to drive the weight assembly (1) to move upwards through the sling assembly (3); The sling assembly (3) comprises a sling (31), a sling rope (32) and a pulley assembly (33); the sling (31) is used to sling the weight assembly (1); the pulley assembly (33) is movably arranged relative to the support assembly (2); the upper end of the sling rope (32) is used to connect to the pulley assembly (33); and the lower end of the sling rope (32) is used to connect to the sling (31); The sling assembly (3) comprises: a connecting rod (34) and a sling guide mechanism (35) arranged outside the connecting rod (34), and two ends of the connecting rod (34) are respectively connected to the sling (31) and the sling rope (32); The support assembly (2) comprises a hanger guide rail, and the hanger guide rail is spaced apart from the hanger assembly (3); The hanger guide mechanism (35) is arranged corresponding to the hanger guide rail, so as to guide the movement of the connecting rod (34) through the cooperation between the hanger guide rail and the hanger guide mechanism (35); The energy storage device comprises a hanger assembly (5), wherein the hanger assembly (5) is arranged above the support assembly (2) and is used for installing the hanger assembly (3); The support assembly (2) comprises a plurality of lifting channels (20), the energy storage device comprises a plurality of weight assemblies (1), and the plurality of weight assemblies (1) are arranged in a one-to-one correspondence in the plurality of lifting channels (20); The hanger assembly (5) is movably arranged on the support assembly (2) to drive the hanger assembly (3) to move above different weight assemblies (1) to hang different weight assemblies (1); an electric generator (7) disposed on the support assembly (2) or on the support base surface, the electric generator (7) being connected to the weight assembly (1) so as to act as a motor to drive the weight assembly (1) to move upward or to act as a generator to generate electricity when the weight assembly (1) moves downward; The plurality of weight guide mechanisms (13) and the plurality of weight guide rails (25) are arranged in one-to-one correspondence, so as to guide the movement of the weight body (11) through the cooperation between the weight guide mechanisms (13) and the weight guide rails (25).

2. The energy storage device according to claim 1, characterized in that: The weight guide rail (25) comprises a first guide surface (251) and two second guide surfaces (252) respectively located on opposite sides of the first guide surface (251) and connected to the first guide surface (251), each of the second guide surfaces (252) being perpendicular to the first guide surface (251) so as to jointly enclose a guide space with a rectangular cross section; The heavy object guiding mechanism (13) comprises a connecting frame (130) and a plurality of rolling parts arranged on the connecting frame (130) and located in the guiding space, wherein the plurality of rolling parts comprises a first rolling part (131) and two second rolling parts (132) respectively located on opposite sides of the first rolling part (131); The rotation axis of the first rolling part (131) is parallel to the first guide surface (251) and the outer peripheral surface of the first rolling part (131) is in rolling contact with the first guide surface (251); the rotation axis of each second rolling part (132) is parallel to the corresponding second guide surface (252) and the outer peripheral surface of each second rolling part (132) is in rolling contact with the corresponding second guide surface (252).

3. The energy storage device according to claim 1, characterized in that: The energy storage device comprises a buffer component (4), which is arranged below the weight component (1) and is used to buffer the weight component (1) moving close to the support base surface, so as to avoid collision between the weight component (1) and the support base surface.

4. The energy storage device according to claim 3, characterized in that: The weight assembly (1) further comprises a tray (12) disposed below the weight body (11) and fixedly connected to the weight body (11), wherein the tray (12) is used to contact the buffer assembly (4) when the weight assembly (1) moves downward to approach the buffer assembly (4); and / or The buffer assembly (4) comprises a compression spring.

5. The energy storage device according to claim 1, characterized in that: The hanger assembly (5) comprises a hanger body (51) and a horizontal driving component (52) arranged on the hanger body (51), wherein the horizontal driving component (52) is drivingly connected to the hanger body (51) so as to drive the hanger body (51) to move horizontally above the support assembly (2) to above different weight assemblies (1).

6. The energy storage device according to claim 5, characterized in that: A slider (53) is provided below the hanger body (51), and a linear guide rail (27) slidably connected to the slider (53) is provided above the support assembly (2), so that the movement of the hanger body (51) is guided by the slider (53) and the linear guide rail (27).

7. The energy storage device according to claim 1, characterized in that: The electric generator (7) is arranged on the supporting base surface of the supporting assembly (2) or on the supporting assembly (2), and the energy storage device includes a transmission assembly (6), and the transmission assembly (6) is located between the electric generator (7) and the sling assembly (3) to connect the two.

8. The energy storage device according to claim 7, characterized in that: The transmission assembly (6) comprises a winch (63) and a rope (61), a portion of the rope (61) is wound around the winch (63), a free end of the rope (61) is connected to the sling assembly (3), and the electric generator (7) is drivingly connected to the winch (63) to drive the winch (63) to rotate.

9. The energy storage device according to claim 8, characterized in that: The transmission assembly (6) comprises at least one cloth storage mechanism (55), and the cloth storage mechanism (55) comprises: A cloth storage rack (650) is arranged on the movement path of the twisted rope (61); a plurality of rollers (651), the plurality of rollers (651) being arranged on the cloth storage rack (650) at intervals along a first predetermined direction, and each of the rollers (651) being rotatably arranged to allow the twisted rope (61) to pass around; a buffer roller (652), the buffer roller (652) being located between any two adjacent rollers (651) among the plurality of rollers (651), the buffer roller (652) being rotatable and reciprocatable along a second predetermined direction and arranged on the cloth storage rack (650) so as to allow the twisted rope (61) to pass around; an actuator (653) drivingly connected to the buffer roller (652) to drive the buffer roller (652) to move along the second predetermined direction, so that when the hanger assembly (3) moves with the hanger assembly (5), the actuator (653) also drives the buffer roller (652) to move, so that the rope (61) is always in a straightened state; The first predetermined direction and the second predetermined direction are perpendicular to each other.

10. The energy storage device according to claim 8, characterized in that: The transmission assembly (6) comprises at least one cloth storage mechanism (55), and the cloth storage mechanism (55) comprises: A cloth storage rack (650) is arranged on the movement path of the twisted rope (61); a plurality of rollers (651), the plurality of rollers (651) being arranged on the cloth storage rack (650) at intervals along a first predetermined direction, and each of the rollers (651) being rotatably arranged to allow the twisted rope (61) to pass around; A plurality of buffer rollers (652) and a plurality of over rollers (651) are arranged on the cloth storage rack (650) at intervals along a first predetermined direction, each of the buffer rollers (652) is located between two adjacent over rollers (651), and each of the buffer rollers (652) is rotatable and reciprocatingly movable along a second predetermined direction; a plurality of actuators (653), wherein the plurality of actuators (653) are connected to the plurality of buffer rollers (652) in a one-to-one driving manner so as to drive the corresponding buffer rollers (652) to move along the second predetermined direction, so that when the sling assembly (3) moves along with the hanger assembly (5), the plurality of actuators (653) also drive the plurality of buffer rollers (652) to move respectively, so that the rope (61) is always in a straightened state; The first predetermined direction and the second predetermined direction are perpendicular to each other.

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