Vertical synchronous lifting type gravity flow energy storage system

Abstract

The utility model discloses a vertical synchronous lifting type gravity flow energy storage system, and relates to the technical field of gravity energy storage. Comprising two vertical lifting units, an energy storage device, a driving device and a power generation device, the driving device is connected with the vertical lifting units so as to drive the carrying cables of the two vertical lifting units to operate synchronously, then all the carrying devices are driven to operate, and therefore the multiple energy storage devices are continuously and vertically lifted so that electric energy can be converted into gravitational potential energy to be stored. The multiple carrying devices loaded with the energy storage devices walk downwards under the action of gravity to form continuous gravity flow, and meanwhile the carrying cables of the two vertical lifting units are driven to operate synchronously so as to drive the power generation device to generate power. The utility model provides a vertical synchronous lifting type gravity flow energy storage system, and aims to solve the technical problems in the prior art that intermittent load is generated due to the fact that a single energy storage block is lifted in a steel wire rope winding / friction mode, or the bearing capacity is limited and the effective load is reduced due to the fact that a chain structure is used as a main carrying device of the energy storage block.

Description

Technical Field

[0001] The utility model relates to the technical field of gravity energy storage, and particularly relates to a vertical synchronous lifting type gravity flow energy storage system. Background Art

[0002] Renewable energy represented by wind energy and solar energy has grown rapidly, and its volatility and intermittency pose challenges to the stability of the power grid. Energy storage technology has become a key means to balance supply and demand and ensure the stability of the power grid. Electrochemical energy storage (such as lithium-ion batteries) has problems of raw material dependence (such as lithium resources) and safety risks; pumped-storage energy storage is limited by geographical conditions and water resources and is difficult to be popularized in water-scarce and complex terrain areas. In this context, gravity energy storage based on height difference has gradually attracted attention due to its advantages such as not relying on water resources, flexible siting, and long service life (for example, up to 50 years). As a form of gravity energy storage, vertical lifting energy storage realizes energy storage and release through the vertical lifting of heavy objects, and vertical lifting energy storage does not need to rely on natural water bodies or complex terrains and can be deployed in abandoned mines, urban underground spaces or ground structures, especially suitable for water-scarce areas in northern China and urban microgrid scenarios, which can expand the coverage of energy storage. Although the existing vertical lifting energy storage systems have verified the technical feasibility, there are still the following technical problems: One type of vertical lifting energy storage system uses a wire rope winding type / friction type lifting device to lift single energy storage blocks successively, but the intermittent load generated by successively lifting the energy storage blocks easily leads to discontinuous charge and discharge; another type uses a chain structure as the main carrier device for the energy storage blocks, but the mechanical strength of the chain structure limits its load-bearing capacity, and the self-weight of the chain structure is relatively large, which reduces the effective load for lifting the energy storage blocks to a certain extent, thus limiting the power generation efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a vertical synchronous lifting type gravity flow energy storage system to solve, to a certain extent, the technical problems in the prior art that intermittent load is generated by using a wire rope winding type / friction type to lift a single energy storage block, or the load-bearing capacity is limited and the effective load is reduced when using a chain structure as the main carrier device for the energy storage blocks.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A vertical synchronous lifting type gravity flow energy storage system includes two vertical lifting units, and also includes an energy storage device, a driving device and a power generation device;

[0006] Each of the vertical lifting units includes a carrier cable, a first steering structure, a second steering structure, and a carrier device; in a single vertical lifting unit, the second steering structure is located above the first steering structure, the carrier cable circulates between the first steering structure and the second steering structure, and a plurality of the carrier devices are fixedly connected to the carrier cable;

[0007] The corresponding carrier devices of the two vertical lifting units can be detachably connected to the same energy storage device respectively;

[0008] The driving device is connected to the vertical lifting unit to be able to drive the carrier cables of the two vertical lifting units to rotate synchronously, and then drive all the carrier devices to rotate, so as to continuously vertically lift a plurality of the energy storage devices to convert electrical energy into gravitational potential energy for storage;

[0009] The power generation device is connected to the vertical lifting unit; a plurality of the carrier devices loaded with the energy storage devices walk downward under the action of gravity to form a continuous gravity flow, and at the same time drive the carrier cables of the two vertical lifting units to rotate synchronously to drive the power generation device to generate electricity, so as to convert the continuous gravity flow into a continuous energy flow, thereby realizing continuous discharge.

[0010] In any of the above technical solutions, optionally, the two vertical lifting units are located on both sides of the same energy storage device;

[0011] The rotation directions of the carrier cables of the two vertical lifting units are opposite;

[0012] A single vertical lifting unit includes at least two carrier cables;

[0013] All the carrier cables are arranged in parallel;

[0014] The carrier devices of the two vertical lifting units are arranged at intervals.

[0015] In any of the above technical solutions, optionally, in a single vertical lifting unit, the carrier device includes a carrier frame, a connecting frame, a fixed connection device, and a rope connection structure; the carrier device has a first direction, a second direction, and a third direction that intersect pairwise;

[0016] The carrier frame includes at least two carrier sub-frames; all the carrier sub-frames are arranged at intervals in sequence along the first direction; each carrier sub-frame is connected with at least two rope connection structures arranged along the second direction; the rope connection structures are fixedly connected to the carrier cable;

[0017] Along the third direction, the connecting frame and the carrying cable are respectively located on both sides of the carrying frame; each of the carrying sub-frames is respectively connected to the connecting frame, and the fixed connection device is connected to the connecting frame;

[0018] The energy storage device is detachably connected to the fixed connection device.

[0019] In any of the above technical solutions, optionally, the number of the carrying sub-frames is two, namely a first carrying sub-frame and a second carrying sub-frame;

[0020] The number of the rope connection structures on the first carrying sub-frame, the number of the rope connection structures on the second carrying sub-frame and the number of the carrying cables are the same; along the first direction, the rope connection structures on the first carrying sub-frame and the rope connection structures on the second carrying sub-frame are respectively fixedly connected to the corresponding carrying cables;

[0021] The connecting frame includes a pull rod and a connecting support rod; the first end of the pull rod is pivotally connected to the first carrying sub-frame, and the corresponding second end is pivotally connected to the connecting support rod; the first end of the connecting support rod is fixedly connected to the second carrying sub-frame, and the corresponding second end is connected to the fixed connection device; the second end of the pull rod is located between the first end and the second end of the connecting support rod;

[0022] The fixed connection device and / or the connecting support rod support and connect the energy storage device so that the energy storage device is located above the connecting support rod.

[0023] In any of the above technical solutions, optionally, the connecting frame further includes a reinforcing rod; the first end of the reinforcing rod is fixedly connected to the second carrying sub-frame, and the corresponding second end is connected to the connecting support rod; the fixed connection device, the second end of the reinforcing rod, the second end of the pull rod and the first end of the connecting support rod are arranged in sequence along the axial direction of the connecting support rod;

[0024] The fixed connection devices of the two vertical lifting units are respectively connected to the corresponding two ends of the energy storage device.

[0025] In any of the above technical solutions, optionally, the pull rod includes two pull rod parts; the lengths of the two pull rod parts are the same and they are hinged to each other; the plane formed by the first carrying sub-frame and the second carrying sub-frame can form a right triangle with the connecting support rod and the pull rod in the first direction;

[0026] The length between the second end of the drawbar and the first end of the connecting support rod is a, and the included angle between the drawbar and the connecting support rod is α. Then the length of the drawbar is a / cosα, and the vertical distance between the centers of the first carrying carriage and the second carrying carriage is y: y = a·tanα;

[0027] The radii of both the first steering structure and the second steering structure are r. When the carrying device runs to the first steering structure or the second steering structure, the central angle corresponding to y is 2β, and the included angle between the drawbar part and the tangent of the outer circumferential surface of the first steering structure or the second steering structure is θ; then

[0028] ;

[0029] If 90° < θ, then y is greater than

[0030] .

[0031] In any of the above technical solutions, optionally, the drawbar includes at least two drawbar parts, and the multiple drawbar parts are sequentially hinged; the hinge axes of all the drawbar parts, the pivot axis of the connecting support rod and the drawbar, and the pivot axis of the drawbar and the first carrying carriage are parallel.

[0032] In any of the above technical solutions, optionally, the drawbar includes two drawbar parts;

[0033] When the first carrying carriage is parallel to the second carrying carriage, the plane where the first carrying carriage and the second carrying carriage are located is perpendicular to the connecting support rod.

[0034] In any of the above technical solutions, optionally, the rope connection structure includes a cable clip, a locking part and a fastening part; the cable clip includes an end part and a screw part which are fixedly connected;

[0035] At least one of the end part of the cable clip and the locking part has a cable groove for accommodating the carrying cable;

[0036] The screw part of the cable clip is sequentially sleeved with the locking part, the fastening part, the carrying carriage and the fastening part; the fastening part between the locking part and the carrying carriage is used to clamp and fix the carrying cable by the locking part and the cable clip; the fastening part on the side of the carrying carriage away from the locking part is used to fasten the rope connection structure on the carrying carriage.

[0037] In any of the above technical solutions, optionally, the end part of the cable clip includes a flat part and a transition part;

[0038] Axially along the cable groove, both ends of the straight portion are fixedly connected with the transition portion; the outer diameter of the transition portion gradually decreases, the large-diameter end of the transition portion is connected with the straight portion, and the outer diameter of the straight portion is a constant value;

[0039] Both the cable clamping member and the locking member are provided with cable grooves;

[0040] The cable groove penetrates through the straight portion and the transition portion.

[0041] In any of the above technical solutions, optionally, the driving device is connected to the first steering structure and / or the second steering structure to be able to drive the carrier cable to operate;

[0042] The power generation device is connected to the first steering structure and / or the second steering structure;

[0043] The axis of the first steering structure and the axis of the second steering structure are both parallel to the horizontal direction;

[0044] The first steering structure and the second steering structure are respectively a steering wheel or a drum;

[0045] When the first steering structure or the second steering structure is a steering wheel, the number of the steering wheels of the first steering structure or the second steering structure is the same as the number of the carrier cables, and the steering wheel is provided with a wheel groove matching with the carrier cable; all the steering wheels of the first steering structure or the second steering structure are connected through a coupling, and the driving device or the power generation device is respectively connected to the coupling;

[0046] When the first steering structure or the second steering structure is a drum, the drum is provided with wheel grooves with the same number as all the carrier cables, and the driving device or the power generation device is respectively connected to the drum shaft;

[0047] Both the first steering structure and the second steering structure are connected to the support;

[0048] The driving device and the power generation device are an electric generator, or the driving device and the power generation device are independent of each other.

[0049] In any of the above technical solutions, optionally, the two vertical lifting units are jointly connected to the corresponding driving device, or the two vertical lifting units are respectively connected to different driving devices;

[0050] The two vertical lifting units are jointly connected to the corresponding power generation device, or the two vertical lifting units are respectively connected to different power generation devices;

[0051] In a single vertical lifting unit, the number of the carrier cables is two, and the carrier cables and the energy storage device are located on both sides of the carrier device;

[0052] The first steering structure is located at a low altitude position, and the second steering structure is located at a high altitude position opposite to the low altitude position; the vertically synchronized lifting gravity flow energy storage system further includes a transfer device; the transfer device is provided at both the low altitude position and the high altitude position; the energy storage device is reciprocally transported between the stacking yard and the carrier device through the transfer device.

[0053] Adopting the above technical solution, the beneficial effects of the present utility model are mainly as follows:

[0054] The vertically synchronized lifting gravity flow energy storage system provided by the present utility model drives and bears the movement of the carrier device through the carrier cables of two vertical lifting units, and thus can drive and bear the movement of the energy storage device, effectively improving the stability and safety of the energy storage device during movement; compared with the chain structure, the carrier cable has a stronger bearing capacity and a relatively smaller self-weight, effectively improving the bearing capacity and load utilization rate of the vertically synchronized lifting gravity flow energy storage system; compared with the intermittent lifting of a single energy storage device by a wire rope winding / friction type lifting structure, the vertically synchronized lifting gravity flow energy storage system can continuously transport multiple energy storage devices through the cyclic operation of the carrier cable between the first steering structure and the second steering structure, not only improving the system transport capacity, but also providing a continuous gravity flow, which can be converted into a continuous energy flow by a power generation device, thereby realizing continuous power discharge.

[0055] In order to make the above objects, features and advantages of the present application more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. Description of the Drawings

[0056] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0057] Figure 1 It is the first structural schematic diagram of the vertically synchronized lifting gravity flow energy storage system provided by the embodiment of the present utility model;

[0058] Figure 2 and Figure 3 is Figure 1 the partial enlarged view of the vertically synchronized lifting gravity flow energy storage system shown;

[0059] Figure 4 For Figure 1 The partial enlarged view of area A of the vertical synchronous lifting gravity flow energy storage system shown;

[0060] Figure 5 For Figure 1 The structural schematic diagram of the second steering structure, driving device and power generation device shown;

[0061] Figure 6 For Figure 1 The structural schematic diagram of the carrier device shown;

[0062] Figure 7 For Figure 6 The structural schematic diagram of another perspective of the carrier device shown;

[0063] Figure 8 For Figure 6 The structural schematic diagram of the rope connection structure shown;

[0064] Figure 9 This is the second structural schematic diagram of the vertical synchronous lifting gravity flow energy storage system provided by the embodiment of the present utility model;

[0065] Figure 10 And Figure 11 For Figure 9 The partial enlarged view of the vertical synchronous lifting gravity flow energy storage system shown;

[0066] Figure 12 For Figure 9 The structural schematic diagram of the second steering structure, driving device and power generation device shown.

[0067] Icon: 120 - Carrier cable; 130 - First steering structure; 140 - Second steering structure; 150 - Steering wheel; 160 - Drum; 200 - Carrier device; 210 - Carrier frame; 211 - First carrier sub-frame; 212 - Second carrier sub-frame; 220 - Connecting frame; 222 - Pull rod; 224 - Connecting support rod; 225 - Reinforcing rod; 240 - Rope connection structure; 241 - Cable clamping member; 2411 - Cable groove; 2412 - Straight part; 2413 - Transition part; 242 - Locking member; 243 - Fastening member; 250 - Fixed connection device; 300 - Energy storage device; 400 - Driving device; 500 - Power generation device; 600 - Transfer equipment. Detailed implementation manners

[0068] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Components of the embodiments of the present utility model described and illustrated herein generally may be arranged and designed in a variety of different configurations.

[0069] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0070] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0071] In the description of the present utility model, 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 drawings or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0072] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0073] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0074] The following will describe in detail some embodiments of the present utility model with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0075] Embodiment

[0076] This embodiment provides a vertically synchronized lifting gravity flow energy storage system, which can be used to store electric energy, especially the unstable electric energy generated by power generation technologies such as wind power and photovoltaic power, and can also be used to generate continuous discharge.

[0077] See Figures 1 - 12 As shown, the vertically synchronized lifting gravity flow energy storage system includes two vertical lifting units, and also includes an energy storage device 300, a driving device 400, and a power generation device 500.

[0078] Each vertical lifting unit includes a carrier cable 120, a first steering structure 130, a second steering structure 140, and a carrier device 200; in a single vertical lifting unit, the second steering structure 140 is located above the first steering structure 130, the carrier cable 120 circulates between the first steering structure 130 and the second steering structure 140, and a plurality of carrier devices 200 are fixedly connected to the carrier cable 120. For example, the second steering structure 140 is located directly above or a position similar to directly above the first steering structure 130. For example, the first steering structure 130 is located at a low altitude, and the second steering structure 140 is located at a high altitude opposite to the low altitude. In this embodiment, the altitude of the high altitude is higher than that of the low altitude. In one embodiment, the vertically synchronized lifting gravity flow energy storage system further includes a transfer device 600; transfer devices 600 are provided at both the low altitude and the high altitude; the energy storage device 300 is reciprocally transported between the stacking yard and the carrier device 200 through the transfer device 600 to achieve charging energy storage and discharging; wherein, the stacking yard is used to store the energy storage device 300; optionally, stacking yards are provided at both the low altitude and the high altitude.

[0079] The corresponding carrier devices 200 of the two vertical lifting units can be detachably connected to the same energy storage device 300 respectively; that is, the energy storage device 300 is supported and connected by the carrier devices 200 of the two vertical lifting units to continuously transport a plurality of energy storage devices 300 to a high position or a low position to achieve charging energy storage and discharging.

[0080] The driving device 400 is connected to the vertical lifting units so as to be able to drive the carrier cables 120 of the two vertical lifting units to rotate synchronously, and further drive all the carrier devices 200 to operate, so as to continuously vertically lift a plurality of energy storage devices 300 to store electrical energy as gravitational potential energy, realizing the charging function. Optionally, the driving device 400 is connected to the first steering structure 130 and / or the second steering structure 140 so as to be able to drive the carrier cable 120 to operate. Among them, the driving device 400 being connected to the first steering structure 130 and / or the second steering structure 140 specifically means that the driving device 400 is connected to the first steering structure 130, or the driving device 400 is connected to the second steering structure 140, or the driving device 400 is connected to both the first steering structure 130 and the second steering structure 140. Optionally, the two vertical lifting units are jointly connected to the corresponding driving device 400. For example, the driving device can drive the first steering structures 130 or the second steering structures 140 of the two vertical lifting units to rotate synchronously; or, the two vertical lifting units are respectively connected to different driving devices 400. For example, the first steering structures 130 or the second steering structures 140 of each vertical lifting unit are connected to their respective driving devices 400 to make the carrier cables 120 of the two vertical lifting units rotate synchronously.

[0081] The power generation device 500 is connected to the vertical lifting units; a plurality of carrier devices 200 loaded with energy storage devices 300 walk downward under the action of gravity to form a continuous gravity flow, while driving the carrier cables 120 of the two vertical lifting units to rotate synchronously, so as to drive the power generation device 500 to generate electricity, so as to convert the continuous gravity flow into a continuous energy flow, thereby realizing continuous discharging. Optionally, the power generation device 500 is connected to the first steering structure 130 and / or the second steering structure 140. Specifically, the power generation device 500 is connected to the first steering structure 130, or the power generation device 500 is connected to the second steering structure 140, or the power generation device 500 is connected to both the first steering structure 130 and the second steering structure 140. Optionally, the two vertical lifting units are jointly connected to the corresponding power generation device 500. For example, the power generation device 500 can be connected to the first steering structures 130 or the second steering structures 140 of the two vertical lifting units at the same time; or, the two vertical lifting units are respectively connected to different power generation devices 500. For example, the first steering structures 130 or the second steering structures 140 of each vertical lifting unit are connected to their respective power generation devices 500.

[0082] Optionally, the two vertical lifting units are located on both sides of the same energy storage device 300; the rotation directions of the carrier cables 120 of the two vertical lifting units are opposite; by arranging the two vertical lifting units on both sides of the same energy storage device 300, it is beneficial to the stability of the energy storage device 300 during lifting, and further guarantees the stability of the operation of the vertical synchronous lifting type gravity flow energy storage system to a certain extent.

[0083] Optionally, a single vertical lifting unit includes at least two load-carrying cables 120; for example, in some embodiments, in a single vertical lifting unit, the number of load-carrying cables 120 is two, and the load-carrying cables 120 and the energy storage device 300 are located on both sides of the load-carrying device 200; by arranging the load-carrying cables 120 and the energy storage device 300 on both sides of the load-carrying device 200, the stability of the operation of the vertically synchronous lifting gravity flow energy storage system is ensured to a certain extent.

[0084] Optionally, all the load-carrying cables 120 are arranged in parallel.

[0085] Optionally, the load-carrying devices 200 of two vertical lifting units are arranged at intervals to avoid interference between the load-carrying devices 200 of the two vertical lifting units during operation.

[0086] Optionally, both the first steering structure 130 and the second steering structure 140 are connected to the support. For example, the support is connected to the ground, a building, etc., and both the first steering structure 130 and the second steering structure 140 are supported by the support.

[0087] In the vertically synchronous lifting gravity flow energy storage system described in this embodiment, the load-carrying device 200 is towed and carried by the load-carrying cables 120 of two vertical lifting units, and thus the energy storage device 300 can be towed and carried to move, effectively improving the stability and safety of the energy storage device 300 during movement; compared with the chain structure, the load-carrying cable 120 has a stronger load-bearing capacity and a relatively smaller self-weight, effectively improving the load-bearing capacity and load utilization rate of the vertically synchronous lifting gravity flow energy storage system; compared with the intermittent lifting of a single energy storage device by a wire rope winding / friction type lifting structure, the vertically synchronous lifting gravity flow energy storage system can continuously transport multiple energy storage devices 300 through the cyclic operation of the load-carrying cable 120 between the first steering structure 130 and the second steering structure 140 by driving the load-carrying device 200 by the driving device 400, not only improving the system transportation capacity, but also providing a continuous gravity flow, and the continuous gravity flow can be converted into a continuous energy flow by the power generation device 500, so as to achieve continuous discharging.

[0088] See Figure 6 and Figure 7 As shown, in the optional solution of this embodiment, in a single vertical lifting unit, the load-carrying device 200 includes a load-carrying frame 210, a connecting frame 220, a fixed connection device 250, and a rope connection structure 240; the load-carrying device 200 has a first direction, a second direction, and a third direction that intersect pairwise; the first direction is, for example, the vertical direction, and the second direction is, for example, parallel to the axial directions of the first steering structure 130 and the second steering structure 140. Optionally, the first direction, the second direction, and the third direction are pairwise perpendicular to each other.

[0089] In a single vertical lifting unit, the carrier frame 210 includes at least two carrier sub-frames; all the carrier sub-frames are arranged at intervals in a first direction in sequence; each carrier sub-frame is connected to the carrier cable 120 through a cable connection structure 240. For example, each carrier sub-frame is connected with at least two cable connection structures 240 arranged in a second direction, and the cable connection structure 240 is fixedly connected to the carrier cable 120. Correspondingly, the number of the carrier cables 120 is multiple; in the first direction, at least some of the cable connection structures 240 corresponding to the carrier sub-frames are connected to the same carrier cable 120; optionally, in the first direction, all the cable connection structures 240 corresponding to the carrier sub-frames are connected to the same carrier cable 120.

[0090] In a single vertical lifting unit, in a third direction, the connecting frame 220 and the carrier cable 120 are respectively located on two sides of the carrier frame 210; each carrier sub-frame is respectively connected to the connecting frame 220, and a fixed connection device 250 is connected to the connecting frame 220; the energy storage device 300 is detachably connected to the fixed connection device 250. That is, the carrier cable 120 and the energy storage device 300 are located on two sides of the carrier device 200. By arranging the connecting frame 220 and the carrier cable 120 on two sides of the carrier frame 210, it can effectively avoid the interference between the energy storage device 300 and the carrier cable 120 during movement, and to a certain extent, ensure the stability of the operation of the vertical synchronous lifting type gravity flow energy storage system.

[0091] Optionally, in a single vertical lifting unit, the number of the carrier sub-frames is two, which are respectively a first carrier sub-frame 211 and a second carrier sub-frame 212. The number of the cable connection structures 240 on the first carrier sub-frame 211, the cable connection structures 240 on the second carrier sub-frame 212 and the carrier cable 120 is the same; and in the first direction, the cable connection structures 240 on the first carrier sub-frame 211 and the cable connection structures 240 on the second carrier sub-frame 212 are respectively fixedly connected to the corresponding carrier cables 120.

[0092] Optionally, the connecting frame 220 includes a pull rod 222 and a connecting support rod 224; the first end of the pull rod 222 is pivotally connected to the first carrier sub-frame 211, and the corresponding second end of the pull rod 222 is pivotally connected to the connecting support rod 224; the first end of the connecting support rod 224 is fixedly connected to the second carrier sub-frame 212, and the corresponding second end of the connecting support rod 224 is connected to the fixed connection device 250; wherein, the second end of the pull rod 222 is located between the first end and the second end of the connecting support rod 224. The fixed connection device 250 and / or the connecting support rod 224 support and connect the energy storage device 300, so that the energy storage device 300 is located above the connecting support rod 224, so that the connecting support rod 224 bears the energy storage device 300.

[0093] In the vertical synchronization lifting gravity flow energy storage system described in this embodiment, the first carrying trolley 211, the second carrying trolley 212, the pull rod 222 and the connecting support rod 224 can form a triangular structure, which helps to improve the stability of the carrying device 200 and the energy storage device 300 during movement, and also helps to improve the load-bearing capacity of the carrying device 200; the first end of the pull rod 222 is pivotally connected to the first carrying trolley 211, and the second end of the pull rod 222 is pivotally connected to the connecting support rod 224, so that the carrying device 200 can turn through the first steering structure 130 and the second steering structure 140, which is beneficial to the turning of the carrying device 200.

[0094] In some embodiments, the connecting frame 220 further includes a reinforcing rod 225; the first end of the reinforcing rod 225 is fixedly connected to the second carrying trolley 212, and the corresponding second end of the reinforcing rod 225 is connected to the connecting support rod 224; the fixing connection device 250, the second end of the reinforcing rod 225, the second end of the pull rod 222 and the first end of the connecting support rod 224 are arranged in sequence along the axial direction of the connecting support rod 224; through the reinforcing rod 225, the load-bearing capacity of the connecting support rod 224 is further improved.

[0095] Optionally, the fixing connection devices 250 of the two vertical lifting units are respectively connected to the corresponding two ends of the energy storage device 300 to improve the stability of the energy storage device 300 during operation to a certain extent.

[0096] See Figure 6 and Figure 7 As shown, in the optional solution of this embodiment, the pull rod 222 includes two pull rod parts; the lengths of the two pull rod parts are the same and they are hinged to each other; the plane formed by the first carrying trolley 211 and the second carrying trolley 212 can form a right triangle with the connecting support rod 224 and the pull rod 222 in the first direction. By forming a right triangle with the first carrying trolley 211, the second carrying trolley 212, the connecting support rod 224 and the pull rod 222 in the first direction, it helps to improve the stability of the carrying device 200 and the energy storage device 300 during movement, and also helps to improve the load-bearing capacity of the carrying device 200.

[0097] For example, the length between the second end of the pull rod 222 and the first end of the connecting support rod 224 is a, that is, the length between the pivoting point of the pull rod 222 and the connecting support rod 224 and the first end of the connecting support rod 224 is a;

[0098] The included angle between the pull rod 222 and the connecting support rod 224 is α, then the length of the pull rod 222 is a / cosα, and the vertical distance between the centers of the first carrying trolley 211 and the second carrying trolley 212 is y: y = a·tanα.

[0099] The radii of both the first steering structure 130 and the second steering structure 140 are r. When the carrier device 200 runs to the first steering structure 130 or the second steering structure 140, the central angle corresponding to y is 2β, and the angle between the tie rod portion and the tangent of the outer circumferential surface of the first steering structure 130 or the second steering structure 140 is θ; then

[0100] ;

[0101] If 90° < θ, then y is greater than

[0102] .

[0103] When the carrier device 200 runs to the top or bottom of the carrier cable 120, that is, when the carrier device 200 reaches the top of the second steering structure 140 or the bottom of the first steering structure 130, the relative relationship between the first carrier sub-frame 211 and the second carrier sub-frame 212 reaches the limit. At this time, the arc length occupied by the carrier device 200 on the outer circumferential surface of the first steering structure 130 or the second steering structure 140 is a·tanα, that is, the arc length occupied by the carrier device 200 on the outer circumferential surface of the first steering structure 130 or the second steering structure 140 is y, and the central angle corresponding to y is 2β, then 2β = a·tanα / r. According to the geometric configuration, the angle θ between the tie rod portion (that is, the length of the tie rod portion, which is half of the length of the tie rod 222) and the tangent of the outer circumferential surface of the first steering structure 130 or the second steering structure 140 can be deduced:

[0104] .

[0105] Since the maximum limit of the tie rod portion can only be tangent to the outer circumferential surface of the first steering structure 130 or the second steering structure 140, so 90° < θ. Therefore, it can be deduced that the vertical distance y between the centers of the first carrier sub-frame 211 and the second carrier sub-frame 212 should satisfy: y >

[0106] .

[0107] Refer to Figure 6 and Figure 7 As shown, in an alternative solution of this embodiment, the tie rod 222 includes at least two tie rod portions, and the multiple tie rod portions are sequentially hinged; the hinge axes of all the tie rod portions, the pivot axis of the connecting support rod 224 and the tie rod 222, and the pivot axis of the tie rod 222 and the first carrier sub-frame 211 are parallel; with the above design, it helps to improve the flexibility of the carrier device 200 and facilitates the steering of the carrier device 200 on the first steering structure 130 and the second steering structure 140.

[0108] Optionally, the first carrier carriage 211 is provided with a support pivotally connected to a pull rod 222; optionally, the connecting support rod 224 is provided with a support pivotally connected to a pull rod 222.

[0109] In some embodiments, the pull rod 222 includes two pull rod portions; when the first carrier carriage 211 is parallel to the second carrier carriage 212, the plane where the first carrier carriage 211 and the second carrier carriage 212 are located is perpendicular to the connecting support rod 224.

[0110] See Figure 8 As shown, in an alternative embodiment of the present embodiment, the rope connection structure 240 includes a cable clip 241, a locking fastener 242, and a fastening member 243; the cable clip 241 includes an end portion and a screw portion fixedly connected.

[0111] Optionally, at least one of the end portion of the cable clip 241 and the locking fastener 242 has a cable groove 2411 for receiving the carrier cable 120. Optionally, both the cable clip 241 and the locking fastener 242 are provided with a cable groove 2411 to reduce or avoid possible damage to the carrier cable 120 when the cable clip 241 and the locking fastener 242 are fastened.

[0112] Optionally, the screw portion of the cable clip 241 is sequentially sleeved with a locking fastener 242, a fastening member 243, a carrier carriage, and a fastening member 243; the fastening member 243 between the locking fastener 242 and the carrier carriage is used to clamp and fix the carrier cable 120 between the locking fastener 242 and the cable clip 241; the fastening member 243 on the side of the carrier carriage away from the locking fastener 242 is used to fasten the rope connection structure 240 to the carrier carriage.

[0113] See Figure 8 As shown, in an alternative embodiment of the present embodiment, the end portion of the cable clip 241 includes a flat portion 2412 and a transition portion 2413.

[0114] Along the axial direction of the cable groove 2411, both ends of the flat portion 2412 are fixedly connected with a transition portion 2413; the outer diameter of the transition portion 2413 gradually decreases, the large-diameter end of the transition portion 2413 is connected to the flat portion 2412, and the outer diameter of the flat portion 2412 is a constant value; through the transition portion 2413, the contact between the carrier device 200 and the first steering structure 130 and the second steering structure 140 is transitioned and buffered, which is beneficial for the carrier device 200 to turn on the first steering structure 130 and the second steering structure 140, and can effectively improve the working life of the carrier device 200 and the carrier cable 120.

[0115] Optionally, both the cable clip 241 and the locking fastener 242 are provided with a cable groove 2411; the cable groove 2411 penetrates through the flat portion 2412 and the transition portion 2413.

[0116] In an alternative solution of this embodiment, the axial directions of both the first steering structure 130 and the second steering structure 140 are parallel to the horizontal direction.

[0117] In an alternative solution of this embodiment, in a single vertical lifting unit, the first steering structure 130 and the second steering structure 140 are respectively a steering wheel 150 or a winding drum 160, that is, the first steering structure 130 is a steering wheel 150 or a winding drum 160, and the second steering structure 140 is a steering wheel 150 or a winding drum 160.

[0118] See Figures 1 - 3 As shown, optionally, in a single vertical lifting unit, when the first steering structure 130 or the second steering structure 140 is a steering wheel 150, the number of the steering wheels 150 of the first steering structure 130 or the second steering structure 140 is the same as the number of the load-carrying cables 120, and the steering wheels 150 are provided with grooves that cooperate with the load-carrying cables 120; all the steering wheels 150 of the first steering structure 130 or the second steering structure 140 are connected by couplings, and the driving device 400 or the power generation device 500 is respectively connected to the couplings, so that the driving device 400 or the power generation device 500 respectively drives all the steering wheels 150 of the first steering structure 130 or all the steering wheels 150 of the second steering structure 140 through the couplings, so that all the steering wheels 150 of the first steering structure 130 rotate synchronously or all the steering wheels 150 of the second steering structure 140 rotate synchronously.

[0119] See Figures 9 - 11 As shown, optionally, in a single vertical lifting unit, when the first steering structure 130 or the second steering structure 140 is a winding drum 160, the winding drum 160 is provided with grooves having the same number as all the load-carrying cables 120, and the driving device 400 or the power generation device 500 is respectively connected to the barrel shaft of the winding drum 160; that is, the first steering structure 130 is provided with a winding drum 160 for rotatably connecting with all the load-carrying cables 120; the second steering structure 140 is also provided with a winding drum 160 for rotatably connecting with all the load-carrying cables 120. In this embodiment, the first steering structure 130 or the second steering structure 140 is provided with grooves to increase the friction between the load-carrying cable 120 and the first steering structure 130 and the second steering structure 140, and can also prevent the load-carrying cable 120 from detaching from the first steering structure 130 and the second steering structure 140.

[0120] In this embodiment, the driving device 400 can be arranged at a low altitude to drive and connect the first steering structure 130, or at a high altitude to drive and connect the second steering structure 140, or driving devices 400 can be arranged at both low and high altitudes to drive and connect the first steering structure 130 and the second steering structure 140. When the driving device 400 is at a high altitude, the load during the energy storage process can be reduced; when it is at a low altitude, it is convenient for the installation of the driving device 400. The specific installation position of the driving device 400 can be determined according to the on-site situation.

[0121] In this embodiment, the power generation device 500 can be arranged at a low altitude to drive and connect the first steering structure 130, or at a high altitude to drive and connect the second steering structure 140, or power generation devices 500 can be arranged at both low and high altitudes to connect the first steering structure 130 and the second steering structure 140. When the power generation device 500 is at a high altitude, the load during the energy storage process can be reduced; when it is at a low altitude, it is convenient for the installation of the power generation device 500. The specific installation position of the power generation device 500 can be determined according to the on-site situation.

[0122] In some embodiments, the driving device 400 and the power generation device 500 can be integrated or separated. Optionally, the driving device 400 and the power generation device 500 are motor-generators, or the driving device 400 and the power generation device 500 are independent of each other. Among them, a motor-generator (English name: Motor-Generator) refers to a device that can not only act as a motor to convert electrical energy into gravitational potential energy, but also act as a generator to convert gravitational potential energy into electrical energy in this embodiment, and it has a two-way energy conversion function.

[0123] The vertical synchronous lifting gravity flow energy storage system provided in this embodiment has the following beneficial effects compared with the prior art:

[0124] 1. Using the carrier cable 120 to replace the chain to transport the energy storage device 300: The strength of the carrier cable (such as a steel wire rope or a high-strength composite material rope) is much higher than that of the traditional chain, and it can carry a larger mass of the energy storage device 300, which can increase the power generation per unit time. At the same time, the material density of the carrier cable is smaller, the weight is lighter, and the energy loss during lifting is less.

[0125] 2. Two vertical lifting units synchronously lift multiple energy storage devices 300: Compared with the intermittent lifting of a single energy storage device by means of a wire rope winding / friction structure, the vertical synchronous lifting type gravity flow energy storage system in this embodiment can continuously transport multiple energy storage devices 300 by using the method of lifting by two vertical lifting units (for example, using a four-corner lifting method). This not only improves the system's transport capacity but also provides a continuous gravity flow, which can be converted into a continuous energy flow by the power generation device 500, thus realizing continuous power discharge. In addition, the two vertical lifting units drive multiple transport devices 200 to operate, which is beneficial to the precise motion control of the energy storage device 300 with a large load, especially suitable for scenarios that require frequent lifting and lowering or have high requirements for docking accuracy. The two vertical lifting units can adopt a scheme controlled by multiple driving devices 400 respectively, and are synchronously adjusted through a PLC or a servo system to achieve higher-precision positioning.

[0126] 3. Use multiple transport ropes 120 to transport the energy storage device 300: Multiple transport ropes simultaneously pull and drive the energy storage device 300 to move and bear the load of the energy storage device 300. The multi-rope system reduces the load borne by a single rope, ensuring the safety and reliability of the system. The reduction of the rope load means that more energy storage devices 300 can be transported synchronously, improving the system's transport capacity and ensuring the high-efficiency operation of the energy storage and power generation states, and enabling high-power storage / discharge of electric energy.

[0127] 4. The unique structure of the transport device 200 innovates the way the transport device 200 passes through the drum: The transport device 200 adopts a method of arranging two upper and lower transport sub-frames in parallel, that is, the first transport sub-frame 211 and the second transport sub-frame 212 are arranged in parallel up and down. The two transport sub-frames are connected by two groups of tie rods 222 and connecting struts 224 to form a triangular structure. A rope connection structure 240 is arranged on each transport sub-frame for fixedly connecting with the transport rope 120. A fixed connection device 250 is connected to each connecting strut 224 for fixing the energy storage device 300 during transportation. When transporting the energy storage device 300, the transport devices 200 of the two vertical lifting units jointly lift an energy storage device 300. At this time, under the action of an external force, the two tie rod parts are pulled into a straight line. When the energy storage device 300 is released, the transport device 200 needs to turn after passing through the drum. When the transport device 200 passes through the drum, the two transport sub-frames are not completely in the same plane. At the same time, due to the disappearance of the external force, an angle exists between the two tie rod parts, thus ensuring that the transport device 200 can pass through the drum "flexibly".

[0128] 5. When the first steering structure 130 or the second steering structure 140 is the drum 160, compared with the first steering structure 130 or the second steering structure 140 being the steering wheel 150, the drum 160 also increases the contact area with the carrier cable 120, thereby increasing the friction between the drum 160 and the carrier cable 120. Furthermore, to a certain extent, the charging / discharging efficiency is improved, and high-power storage / discharge of electric energy can be achieved. In addition, the drum 160 can also provide a more uniform contact force with the carrier cable 120, effectively reducing the wear of the carrier cable 120 and extending the service life of the carrier cable 120. At the same time, the drum 160 is less likely to slip, which is more beneficial to the stability of the vertical synchronous lifting gravity flow energy storage system.

[0129] 6. By changing the gravity flow lifting speed or changing the gravity flow magnitude, the power consumption or power generation of the real-time state can be arbitrarily adjusted; the energy storage device 300 is safely and economically stored and accessed efficiently and quickly.

[0130] To more clearly understand the vertical synchronous lifting gravity flow energy storage system described in this embodiment, the following briefly describes the energy storage method:

[0131] During energy storage charging, the energy storage device 300 is located at a low altitude. The driving device 400 is driven by electric energy to drive the rotation of the first steering structure 130 and the second steering structure 140 of the two vertical lifting units, so as to drive the carrier cable 120 to operate, and then drive all the carrier devices 200 to move under the traction of the carrier cable 120; a plurality of energy storage devices 300 are continuously assembled on the carrier device 200 and continuously transported to the upper storage yard at a high altitude and unloaded, thereby converting electric energy into gravitational potential energy for storage; when approaching the upper storage yard, the energy storage device 300 is separated from the carrier device 200, and the energy storage device 300 is sent into the upper storage yard and quickly transported away by a transfer vehicle for storage. The carrier device 200 continuously travels along the carrier cable 120 and finally returns to the lower storage yard again, ready to start a new round of transportation tasks for the energy storage device 300.

[0132] During discharging, the energy storage device 300 is located at the upper storage yard at a high altitude. Multiple energy storage devices 300 are continuously assembled on the carrier device 200 and walk under the action of gravity to the lower storage yard at a low altitude and are unloaded, while driving the carrier cable 120 to operate; the carrier cable 120 drives the first steering structure 130 and the second steering structure 140 of the two vertical lifting units to operate, so as to drive the corresponding power generation device 500 to generate electricity continuously, thereby converting gravitational potential energy into continuous electrical energy, so that the gravitational flow formed by the continuous on-line walking of several energy storage devices 300 is converted into continuous energy flow, thereby realizing continuous charging and discharging. Among them, when approaching the lower storage yard, the energy storage device 300 is separated from the carrier device 200, and the energy storage device 300 is sent to the lower storage yard and transported away by a transfer vehicle for storage; while the carrier device 200 continues to travel along the carrier cable 120; finally, the carrier device 200 returns to the upper storage yard to prepare for a new round of energy storage device 300 transportation tasks.

[0133] In one embodiment, multiple energy storage devices 300 are assembled on the carrier device 200 one by one at a preset interval, so that the energy storage devices 300 are continuously carried. Among them, the preset interval is, for example, one energy storage device 300 is assembled on each carrier device 200, or one energy storage device 300 is assembled on every other carrier device 200, or one energy storage device 300 is assembled on every two carrier devices 200, etc.

[0134] The traveling speed and interval of the energy storage device 300 are adjusted in real time according to requirements to change the magnitude of the gravitational flow, so as to adjust the energy flow as needed, and then realize the functions of "slow charge and fast discharge" or "charge and discharge as needed". Adjusting the traveling speed of the energy storage device 300 can be adjusted, for example, by adjusting the speed of the driving device 400 and the power generation device 500. By adjusting the traveling speed and interval of the energy storage device 300 in real time according to requirements to change the magnitude of the gravitational flow, the adaptability of the vertical synchronous lifting type gravitational flow energy storage system is wider.

[0135] In one embodiment, the number of vertical synchronous lifting type gravitational flow energy storage systems is multiple; multiple vertical synchronous lifting type gravitational flow energy storage systems are installed side by side in the horizontal direction according to the terrain of the vertical structure, and larger-scale energy storage can be realized. The vertical structure is, for example, an abandoned mine, a specific building, etc.

[0136] Example of the power generation amount of the vertical synchronous lifting type gravitational flow energy storage system described in this embodiment:

[0137] The energy storage device 300 has a reinforced concrete material as the main body, with a density of 2500 kg / m 3 . The outer shape is a cuboid with a length of 1.2 m × a width of 1.2 m × a height of 1.0 m and weighs 3.6 tons. Assuming a vertical lift of 200 m, lifting a single energy storage device 300 from the lower storage yard (i.e., low altitude) to the upper storage yard (i.e., high altitude), the stored energy E = mgh = 3.6×103 kg×9.8m / s 2 ×200m = 7,056,000J ≈ 1.96kWh. Referring to the operating speeds of equipment such as mine hoists, cranes, and elevators, if the speed is 8 m / s, it can travel 28.8 km per hour. Assuming that the energy storage devices 300 are arranged at intervals of 15 m, then 1920 energy storage devices 300 can be transported to the upper storage yard per hour, and 1920 × 1.96 kWh / device = 3763.2 kWh ≈ 3.8 MWh of energy can be stored per hour. To improve the power generation capacity, multiple systems can be arranged side by side in multiple rows on the terrain; or the speed of the carrier cable 120 can be increased or the spacing of the energy storage devices 300 can be reduced to expand the energy storage scale.

[0138] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. 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. A vertical synchronous lifting gravity flow energy storage system, characterized in that: It comprises two vertical lifting units, an energy storage device (300), a driving device (400) and a power generation device (500); Each of the vertical lifting units comprises a carrying rope (120), a first steering structure (130), a second steering structure (140) and a carrying device (200); in a single vertical lifting unit, the second steering structure (140) is located above the first steering structure (130), the carrying rope (120) circulates between the first steering structure (130) and the second steering structure (140), and a plurality of the carrying devices (200) are fixedly connected to the carrying rope (120); The corresponding carrying devices (200) of the two vertical lifting units can be respectively detachably connected to the same energy storage device (300); The driving device (400) is connected to the vertical lifting unit so as to drive the carrying ropes (120) of the two vertical lifting units to operate synchronously, thereby driving all the carrying devices (200) to operate, thereby continuously lifting the plurality of energy storage devices (300) vertically to convert electrical energy into gravitational potential energy for storage; The power generation device (500) is connected to the vertical lifting unit; The plurality of carriers (200) loaded with the energy storage devices (300) move downward under the action of gravity to form a continuous gravity flow, and at the same time drive the carrier ropes (120) of the two vertical lifting units to operate synchronously to drive the power generation device (500) to generate electricity, so as to convert the continuous gravity flow into a continuous energy flow, thereby achieving continuous discharge.

2. The vertical synchronous lifting gravity flow energy storage system according to claim 1 is characterized in that: The two vertical lifting units are located on both sides of the same energy storage device (300); The carrying ropes (120) of the two vertical lifting units run in opposite directions; A single vertical lifting unit comprises at least two carrying ropes (120); All the carrying ropes (120) are arranged in parallel; The carrying devices (200) of the two vertical lifting units are arranged at intervals.

3. The vertical synchronous lifting gravity flow energy storage system according to claim 1 is characterized in that: In a single vertical lifting unit, the carrier (200) comprises a carrier frame (210), a connecting frame (220), a fixed connecting device (250) and a rope connecting structure (240); the carrier (200) has a first direction, a second direction and a third direction which intersect each other; The transport rack (210) comprises at least two transport small racks; all the transport small racks are sequentially arranged at intervals along the first direction; each of the transport small racks is connected to at least two rope connection structures (240) arranged along the second direction; the rope connection structure (240) is fixedly connected to the transport rope (120); Along the third direction, the connecting frame (220) and the carrying rope (120) are respectively located on both sides of the carrying frame (210); each of the small carrying frames is respectively connected to the connecting frame (220), and the fixed connection device (250) is connected to the connecting frame (220); The energy storage device (300) is detachably connected to the fixed connection device (250).

4. The vertical synchronous lifting gravity flow energy storage system according to claim 3 is characterized in that: The number of the transport racks is two, namely a first transport rack (211) and a second transport rack (212); The number of the rope connection structures (240) on the first transport frame (211), the number of the rope connection structures (240) on the second transport frame (212), and the transport ropes (120) are the same; along the first direction, the rope connection structures (240) on the first transport frame (211) and the rope connection structures (240) on the second transport frame (212) are respectively fixedly connected to the corresponding transport ropes (120); The connecting frame (220) comprises a pull rod (222) and a connecting support rod (224); a first end of the pull rod (222) is pivotally connected to the first transport frame (211), and a corresponding second end is pivotally connected to the connecting support rod (224); a first end of the connecting support rod (224) is fixedly connected to the second transport frame (212), and a corresponding second end is connected to the fixed connection device (250); the second end of the pull rod (222) is located between the first end and the second end of the connecting support rod (224); The fixed connection device (250) and / or the connecting support rod (224) support and connect the energy storage device (300), so that the energy storage device (300) is located above the connecting support rod (224).

5. The vertical synchronous lifting gravity flow energy storage system according to claim 4 is characterized in that: The connecting frame (220) further comprises a reinforcing rod (225); a first end of the reinforcing rod (225) is fixedly connected to the second transport frame (212), and a corresponding second end is connected to the connecting support rod (224); the fixed connection device (250), the second end of the reinforcing rod (225), the second end of the pull rod (222) and the first end of the connecting support rod (224) are arranged in sequence along the axial direction of the connecting support rod (224); The fixed connection devices (250) of the two vertical lifting units are respectively connected to corresponding two ends of the energy storage device (300).

6. The vertical synchronous lifting gravity flow energy storage system according to claim 4 is characterized in that: The pull rod (222) comprises two pull rod parts; the two pull rod parts have the same length and are hinged to each other; a plane formed by the first transport frame (211) and the second transport frame (212), the connecting support rod (224) and the pull rod (222) can form a right triangle in the first direction; The length between the second end of the pull rod (222) and the first end of the connecting support rod (224) is a, and the angle between the pull rod (222) and the connecting support rod (224) is α. Then, the length of the pull rod (222) is a / cosα, and the vertical distance between the centers of the first transport rack (211) and the second transport rack (212) is y: y=a·tanα; The radii of the first steering structure (130) and the second steering structure (140) are both r, and when the carrier (200) runs to the first steering structure (130) or the second steering structure (140), the central angle corresponding to y is 2β, and the angle between the pull rod portion and the tangent line of the outer circumferential surface of the first steering structure (130) or the second steering structure (140) is θ; then ； If 90°<θ, then y is greater than 。 7. The vertical synchronous lifting gravity flow energy storage system according to claim 4, characterized in that: The pull rod (222) comprises at least two pull rod parts, and the plurality of pull rod parts are hinged in sequence; the hinge axes of all the pull rod parts, the pivot axis between the connecting rod (224) and the pull rod (222), and the pivot axis between the pull rod (222) and the first transport frame (211) are parallel.

8. The vertical synchronous lifting gravity flow energy storage system according to claim 7 is characterized in that: The pull rod (222) comprises two pull rod parts; When the first small transport rack (211) and the second small transport rack (212) are parallel, the plane where the first small transport rack (211) and the second small transport rack (212) are located is perpendicular to the connecting support rod (224).

9. The vertical synchronous lifting gravity flow energy storage system according to claim 3, characterized in that: The rope connection structure (240) comprises a rope clamping member (241), a locking member (242) and a fastener (243); the rope clamping member (241) comprises a fixedly connected end portion and a screw rod portion; At least one of the end of the cable clamping member (241) and the locking member (242) has a cable groove (2411) for accommodating the carrying cable (120); The screw portion of the cable clamping member (241) is sleeved with the locking member (242), the fastener (243), the small transport frame and the fastener (243) in sequence; the fastener (243) between the locking member (242) and the small transport frame is used to enable the locking member (242) and the cable clamping member (241) to clamp and fix the transport rope (120); the fastener (243) on the side of the small transport frame away from the locking member (242) is used to fasten the rope connection structure (240) to the small transport frame.

10. The vertical synchronous lifting gravity flow energy storage system according to claim 9, characterized in that: The end of the cable clamp (241) comprises a straight portion (2412) and a transition portion (2413); Along the axial direction of the cable groove (2411), both ends of the straight portion (2412) are fixedly connected to the transition portion (2413); the outer diameter of the transition portion (2413) gradually decreases, the large diameter end of the transition portion (2413) is connected to the straight portion (2412), and the outer diameter of the straight portion (2412) is a constant value; The cable clamping member (241) and the locking member (242) are both provided with a cable groove (2411); The cable groove (2411) passes through the straight portion (2412) and the transition portion (2413).

11. The vertical synchronous lifting gravity flow energy storage system according to claim 1, characterized in that: The driving device (400) is connected to the first steering structure (130) and / or the second steering structure (140) so as to be able to drive the carrying rope (120) to operate; The power generation device (500) is connected to the first steering structure (130) and / or the second steering structure (140); The axial direction of the first steering structure (130) and the axial direction of the second steering structure (140) are both parallel to the horizontal direction; The first steering structure (130) and the second steering structure (140) are steering wheels (150) or reels (160) respectively; When the first steering structure (130) or the second steering structure (140) is a steering wheel (150), the number of the steering wheels (150) of the first steering structure (130) or the second steering structure (140) is consistent with the number of the carrying ropes (120), and the steering wheels (150) are provided with wheel grooves that match the carrying ropes (120); all the steering wheels (150) of the first steering structure (130) or the second steering structure (140) are connected via a coupling, and the driving device (400) or the power generation device (500) is respectively connected to the coupling; When the first steering structure (130) or the second steering structure (140) is a drum (160), the drum (160) is provided with wheel grooves having the same number as that of all the carrying ropes (120), and the driving device (400) or the power generation device (500) is respectively connected to the drum shaft of the drum (160); The first steering structure (130) and the second steering structure (140) are both connected to a support; The driving device (400) and the power generation device (500) are electric generators, or the driving device (400) and the power generation device (500) are independent of each other.

12. The vertical synchronous lifting gravity flow energy storage system according to claim 1, characterized in that: The two vertical lifting units are commonly connected to the corresponding driving device (400), or the two vertical lifting units are respectively connected to different driving devices (400); The two vertical lifting units are connected to the corresponding power generation device (500) together, or the two vertical lifting units are connected to different power generation devices (500) respectively; In a single vertical lifting unit, the number of the transport cables (120) is two, and the transport cables (120) and the energy storage device (300) are located on both sides of the transport device (200); The first steering structure (130) is located at a low altitude position, and the second steering structure (140) is located at a high altitude position opposite to the low altitude position; the vertical synchronous lifting gravity flow energy storage system further comprises a transfer device (600); the transfer device (600) is provided at both the low altitude position and the high altitude position; and the energy storage device (300) is transported back and forth between a storage yard and the carrier (200) via the transfer device (600).

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